A high efficiency mosfet transformerless inverter for nonisolated microinverter applications
To Get this projects Call : 9566355386 / 99625 88976
Visit : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
Universiti Kuala Lumpur, British Malaysian Institute
The document proposes designing an extension cable that can provide AC power from a solar power system. It involves a solar panel charging a battery via a solar charging controller. An inverter would convert the DC battery power to AC power that can be delivered to devices via the extension cable. The system aims to provide a low-cost way to generate electricity from solar energy for household or industrial use, reducing dependence on fossil fuels.
Nonisolated high step up dc–dc converters adopting switched-capacitor cellLeMeniz Infotech
The document discusses high step-up DC-DC converters used to boost the output voltages of photovoltaic (PV) cells and fuel cells. It proposes a new converter design that combines switched capacitor and switching mode converter topologies. This allows increasing the voltage gain while maintaining high efficiency. The design introduces multiple capacitors charged in parallel and discharged in series to boost output voltage. It can provide regulated voltage and infinitely scale voltage gain as needed for applications like powering grid-connected PV and fuel cell inverters.
ABB Training Colombia Inverters - Focus on residential and commercial solutio...Jesús Leyton P
Esta presentación pertenece a Marco Trova:
Director de Ventas y Servicio Técnico División de Energías Renovables.
Ingeniero Electrónico del Politécnico de Milán,Italia. Desde el 2003 Marco Trova se integró a la División de Energías Renovables y trabajó en el diseño e introducción al mercado de la línea de Inversores Solares AURORA®. En el 2007 fue nombrado como Director de Ventas y Servicio Técnico.
Marco Trova es miembro del IEC TC82 (Comité Técnico IEC 82: "Solar Photovoltaic Energy Systems”) en la rama italiana CEI, en el cual participa activamente en los grupos de trabajo encargados de la elaboración de nuevas normas, incluidos los nuevos códigos de red de baja y media tensión para sistemas conectados a la red.
The document summarizes the design and implementation of a solar integrated smart street lighting system. It includes:
1. An introduction to smart street lighting systems and their benefits over traditional systems like energy savings.
2. Details of the primary electrical components required like solar panels, batteries, LED lights, and circuits for light detection and power control.
3. Explanations and diagrams of the implementation of the control circuits for charging, light detection, alternative power supply, and voltage regulation.
4. A conclusion that such smart solar street lighting systems are more efficient and environmentally friendly than traditional systems and have promising applications for the future.
PV Connections offers the complete range of DC isolators, Solar PV DC isolators switch and weatherproof DC isolation switch. Buy DC isolators online today.
A solar inverter, or PV inverter, converts the direct current (DC) output of a photovoltaic solar panel into a utility frequency alternating current (AC) that can be fed into a commercial electrical grid or used by a local, off-line electrical network.
This document describes a student project to design and implement an automatic street light controller. It aims to save electricity by detecting vehicles and only turning street lights on fully when a vehicle is present. The project uses light dependent resistors, a power supply, relays, timers, and infrared sensors. It discusses the circuit designs and components in detail across multiple chapters. The conclusion states that automatic street lighting can significantly reduce energy consumption compared to manual control.
IRJET- Battery Management System by using PWM Charge ControllerIRJET Journal
This document describes a battery management system that uses a pulse width modulation (PWM) charge controller to regulate the charging of batteries from renewable energy sources like solar panels and wind turbines. The system aims to store excess energy generated during the day from solar panels to power loads when solar generation drops off. It uses a PWM controller to vary the duty cycle of charging to maintain a constant voltage and efficiently charge sealed lead-acid batteries based on their state of charge. The document provides details on the hardware components in the system, including solar panels, wind turbines, batteries, charge controller, and step-down transformer. It concludes that the system can be used to power loads in rural areas lacking reliable energy access while improving battery performance and efficiency through PWM
Universiti Kuala Lumpur, British Malaysian Institute
The document proposes designing an extension cable that can provide AC power from a solar power system. It involves a solar panel charging a battery via a solar charging controller. An inverter would convert the DC battery power to AC power that can be delivered to devices via the extension cable. The system aims to provide a low-cost way to generate electricity from solar energy for household or industrial use, reducing dependence on fossil fuels.
Nonisolated high step up dc–dc converters adopting switched-capacitor cellLeMeniz Infotech
The document discusses high step-up DC-DC converters used to boost the output voltages of photovoltaic (PV) cells and fuel cells. It proposes a new converter design that combines switched capacitor and switching mode converter topologies. This allows increasing the voltage gain while maintaining high efficiency. The design introduces multiple capacitors charged in parallel and discharged in series to boost output voltage. It can provide regulated voltage and infinitely scale voltage gain as needed for applications like powering grid-connected PV and fuel cell inverters.
ABB Training Colombia Inverters - Focus on residential and commercial solutio...Jesús Leyton P
Esta presentación pertenece a Marco Trova:
Director de Ventas y Servicio Técnico División de Energías Renovables.
Ingeniero Electrónico del Politécnico de Milán,Italia. Desde el 2003 Marco Trova se integró a la División de Energías Renovables y trabajó en el diseño e introducción al mercado de la línea de Inversores Solares AURORA®. En el 2007 fue nombrado como Director de Ventas y Servicio Técnico.
Marco Trova es miembro del IEC TC82 (Comité Técnico IEC 82: "Solar Photovoltaic Energy Systems”) en la rama italiana CEI, en el cual participa activamente en los grupos de trabajo encargados de la elaboración de nuevas normas, incluidos los nuevos códigos de red de baja y media tensión para sistemas conectados a la red.
The document summarizes the design and implementation of a solar integrated smart street lighting system. It includes:
1. An introduction to smart street lighting systems and their benefits over traditional systems like energy savings.
2. Details of the primary electrical components required like solar panels, batteries, LED lights, and circuits for light detection and power control.
3. Explanations and diagrams of the implementation of the control circuits for charging, light detection, alternative power supply, and voltage regulation.
4. A conclusion that such smart solar street lighting systems are more efficient and environmentally friendly than traditional systems and have promising applications for the future.
PV Connections offers the complete range of DC isolators, Solar PV DC isolators switch and weatherproof DC isolation switch. Buy DC isolators online today.
A solar inverter, or PV inverter, converts the direct current (DC) output of a photovoltaic solar panel into a utility frequency alternating current (AC) that can be fed into a commercial electrical grid or used by a local, off-line electrical network.
This document describes a student project to design and implement an automatic street light controller. It aims to save electricity by detecting vehicles and only turning street lights on fully when a vehicle is present. The project uses light dependent resistors, a power supply, relays, timers, and infrared sensors. It discusses the circuit designs and components in detail across multiple chapters. The conclusion states that automatic street lighting can significantly reduce energy consumption compared to manual control.
IRJET- Battery Management System by using PWM Charge ControllerIRJET Journal
This document describes a battery management system that uses a pulse width modulation (PWM) charge controller to regulate the charging of batteries from renewable energy sources like solar panels and wind turbines. The system aims to store excess energy generated during the day from solar panels to power loads when solar generation drops off. It uses a PWM controller to vary the duty cycle of charging to maintain a constant voltage and efficiently charge sealed lead-acid batteries based on their state of charge. The document provides details on the hardware components in the system, including solar panels, wind turbines, batteries, charge controller, and step-down transformer. It concludes that the system can be used to power loads in rural areas lacking reliable energy access while improving battery performance and efficiency through PWM
STREET LIGHT THAT GLOWS ON DETECTING VEHICLE MOVEMENTm sivareddy
This document describes a street light system that detects vehicle movement and automatically turns lights on and off to save energy. It uses a microcontroller, light dependent resistors as sensors, and a driver IC to control the street lights. When a vehicle is detected by the changing light levels sensed by the LDRs, the microcontroller turns on lights ahead of the vehicle. As the vehicle passes, the trailing lights are turned off. This allows energy to be saved by only illuminating the portion of the street currently in use. The system provides energy savings for street and highway lighting applications.
street light intensity control using micro-controller krunal103
This document describes an automatic street lighting system that uses an LDR sensor, infrared sensors, and a microcontroller to intelligently control street lights. The system turns lights on when it detects vehicles using infrared sensors and turns them off during the day based on light levels measured by the LDR sensor. This allows energy to be saved by only powering lights when needed. The system aims to reduce energy costs, greenhouse gas emissions, and maintenance costs compared to a conventional street lighting system.
This document describes an automatic street light control system that uses a light dependent resistor and op-amp circuit to switch street lights on and off automatically based on light levels. It aims to reduce energy consumption by preventing lights from staying on during the day or taking too long to turn on at night. The system detects darkness and uses a relay to switch on lights without manual operation. It is powered by a 12V DC supply and can be modified to charge during the day using solar energy.
1) The document describes a Rogowski coil, which is an air-cored toroidal coil that can be placed around a conductor to measure current without breaking the circuit.
2) When current flows through the conductor, it induces a voltage in the coil through electromagnetic induction, proportional to the rate of change of current.
3) This induced voltage is passed through an integrator circuit using an op-amp to obtain the current value. The Rogowski coil allows for continuous current monitoring in industries with high currents, providing safety benefits over other current measurement methods.
Benefits: 20-30% extra energy, Ease of Installation & Expandable, No Single Point of Failure, Improved Safety, Low Space & No Heating, Longer Life, Silent
An inverter converts direct current (DC) from a solar panel into alternating current (AC) that can power household appliances and be fed into the electric grid. There are different types of inverters - string inverters connect multiple solar panels in series, microinverters convert power from individual panels, and central inverters are large units used for large commercial arrays. Inverters use maximum power point tracking technology to optimize power output from solar panels and may include additional functions like battery charging. Grid-tied inverters synchronize with utility power while off-grid inverters operate independently without grid connection.
PV inverter's instruction by thinkpowerChengdong Li
The document discusses Thinkpower's on-grid inverter product series for household use ranging from 1.5-5kw. It provides an overview of the key features and specifications of the T series and S series inverters, including dimensions, weight, power output, and efficiency ratings. It also describes the technological characteristics of Thinkpower inverters, such as their modular design, innovative cooling system, digital control system, use of high-quality components, and multiple protection features. Finally, it discusses the remote monitoring capabilities of Thinkpower inverters using wireless communication and data management through their online monitoring platform.
Ultra sparse ac link converters
To Get this projects Call : 9566355386 / 99625 88976
Visit : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
Reducing the wastage of power
Reducing physical efforts
Improve the system in our daily life
Light falls on LDR, it shows its minimum resistance and voltage drops across LDR less than VBE of Transistor Q1.
So, no current will go from the collector to the emitter and transistor remains turn off.
Delta RPI M10A Three Phase Commercial InverterShane Arnold
This document provides information on Delta's 10kW grid-connect PV inverter. Key details include:
- Delta offers a 5-year warranty as the world's largest power electronics company.
- The inverter has a transformerless design, dual MPP trackers, wide voltage range, high efficiency rating, and IP65 protection.
- Delta is a leading manufacturer of power electronics with over 40 years of experience and global operations.
- The document provides specifications for the inverter's inputs, outputs, monitoring capabilities, certifications and dimensions.
The document discusses advancements in inverter technology. It provides background on inverters and their standard functions of converting DC to AC and integrating distributed energy resources. It then describes advanced inverter functions like reactive power control and voltage/frequency ride-through that provide grid support benefits. Challenges to adoption include developing interoperability standards and ensuring safety. Advancements in PV inverters include the shift from string to micro inverters. Other applications of inverter technology include air conditioners, microwaves, welding equipment and electric vehicles.
Small wind electric systems can provide homeowners with renewable energy and lower electricity bills. They generally consist of a rotor, generator, tower, and other balance of system components like batteries or connections to the electric grid. The size of the turbine's rotor determines how much power it can produce, with systems ranging from under 1 kW for battery charging up to 300 kW for institutional use. Taller towers capture higher wind speeds but also increase costs and risk damage in hurricanes. Successful small wind projects in India have shown that depending on wind resources, homeowners can reduce their electricity bills by 50-90% with these systems.
Muhammad Usman is an electrical engineer with over 7 years of experience in electrical maintenance of power generation equipment, including generators, transformers, switchgears, and circuit breakers. He has worked on projects for KAPCO Power Company and Ali Murtaza Associates Pvt Ltd, maintaining and testing electrical systems. Usman holds a B.E. in Electrical Engineering from Hajvery University Lahore and is registered with the Pakistan Engineering Council.
SOLAR STREET LIGHTING SYSTEM SHOULD BE USED TO DECREASE THE ENERGY DEMAND IN HIGHWAYS ALSO RENEWABLE ENERGY SOURCES CAN BE UTILIZED MORE AND MORE TO REDUCE THE MASSIVE USES OF FOSSIL FUELS WHICH ARE EXTINGUISHABLE.
Learn what is a contactor, its components, types and working principle. A contactor is an electrical device that is used to turn on and off an electrical circuit. It is regarded as a unique sort of relay.
Solar powered automatic street light controller reportAmar Gupta
The document is a project report on a solar energy based automatic street light controller submitted by Amar Gupta, Manisha Bagani, and Varun Shah. It describes the controller's use of a 555 timer IC wired as a monostable multivibrator to automatically turn street lights on at dusk when detected by an LDR light sensor, and off at dawn. When dark, the LDR increases resistance to trigger the 555 IC and relay to power the lights from the solar panel energy storage. It saves around 40% of electricity costs compared to regular street lights.
Project 6: Automatic Street Light ControllerParesh Goel
This document describes a project to build an automatic street light controller. It uses a light dependent resistor (LDR) and Arduino board to sense light levels and control an LED. When the LDR senses darkness, the circuit powers an LED. In daylight, the LED turns off. This automatic system saves time and electricity compared to manual control, and ensures lights are always operated punctually. The parts list and 8 steps show how to assemble the circuit on a breadboard and program the Arduino board to read the LDR sensor and control the LED.
The document discusses different types of solar inverters used in photovoltaic power plants. It describes string inverters, central inverters, microinverters, and battery inverters. For each type, it provides details on how they work and their advantages and disadvantages. The document also discusses factors to consider when selecting an appropriate inverter, such as power rating and efficiency.
STREET LIGHT THAT GLOWS ON DETECTING VEHICLE MOVEMENTm sivareddy
This document describes a street light system that detects vehicle movement and automatically turns lights on and off to save energy. It uses a microcontroller, light dependent resistors as sensors, and a driver IC to control the street lights. When a vehicle is detected by the changing light levels sensed by the LDRs, the microcontroller turns on lights ahead of the vehicle. As the vehicle passes, the trailing lights are turned off. This allows energy to be saved by only illuminating the portion of the street currently in use. The system provides energy savings for street and highway lighting applications.
street light intensity control using micro-controller krunal103
This document describes an automatic street lighting system that uses an LDR sensor, infrared sensors, and a microcontroller to intelligently control street lights. The system turns lights on when it detects vehicles using infrared sensors and turns them off during the day based on light levels measured by the LDR sensor. This allows energy to be saved by only powering lights when needed. The system aims to reduce energy costs, greenhouse gas emissions, and maintenance costs compared to a conventional street lighting system.
This document describes an automatic street light control system that uses a light dependent resistor and op-amp circuit to switch street lights on and off automatically based on light levels. It aims to reduce energy consumption by preventing lights from staying on during the day or taking too long to turn on at night. The system detects darkness and uses a relay to switch on lights without manual operation. It is powered by a 12V DC supply and can be modified to charge during the day using solar energy.
1) The document describes a Rogowski coil, which is an air-cored toroidal coil that can be placed around a conductor to measure current without breaking the circuit.
2) When current flows through the conductor, it induces a voltage in the coil through electromagnetic induction, proportional to the rate of change of current.
3) This induced voltage is passed through an integrator circuit using an op-amp to obtain the current value. The Rogowski coil allows for continuous current monitoring in industries with high currents, providing safety benefits over other current measurement methods.
Benefits: 20-30% extra energy, Ease of Installation & Expandable, No Single Point of Failure, Improved Safety, Low Space & No Heating, Longer Life, Silent
An inverter converts direct current (DC) from a solar panel into alternating current (AC) that can power household appliances and be fed into the electric grid. There are different types of inverters - string inverters connect multiple solar panels in series, microinverters convert power from individual panels, and central inverters are large units used for large commercial arrays. Inverters use maximum power point tracking technology to optimize power output from solar panels and may include additional functions like battery charging. Grid-tied inverters synchronize with utility power while off-grid inverters operate independently without grid connection.
PV inverter's instruction by thinkpowerChengdong Li
The document discusses Thinkpower's on-grid inverter product series for household use ranging from 1.5-5kw. It provides an overview of the key features and specifications of the T series and S series inverters, including dimensions, weight, power output, and efficiency ratings. It also describes the technological characteristics of Thinkpower inverters, such as their modular design, innovative cooling system, digital control system, use of high-quality components, and multiple protection features. Finally, it discusses the remote monitoring capabilities of Thinkpower inverters using wireless communication and data management through their online monitoring platform.
Ultra sparse ac link converters
To Get this projects Call : 9566355386 / 99625 88976
Visit : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
Reducing the wastage of power
Reducing physical efforts
Improve the system in our daily life
Light falls on LDR, it shows its minimum resistance and voltage drops across LDR less than VBE of Transistor Q1.
So, no current will go from the collector to the emitter and transistor remains turn off.
Delta RPI M10A Three Phase Commercial InverterShane Arnold
This document provides information on Delta's 10kW grid-connect PV inverter. Key details include:
- Delta offers a 5-year warranty as the world's largest power electronics company.
- The inverter has a transformerless design, dual MPP trackers, wide voltage range, high efficiency rating, and IP65 protection.
- Delta is a leading manufacturer of power electronics with over 40 years of experience and global operations.
- The document provides specifications for the inverter's inputs, outputs, monitoring capabilities, certifications and dimensions.
The document discusses advancements in inverter technology. It provides background on inverters and their standard functions of converting DC to AC and integrating distributed energy resources. It then describes advanced inverter functions like reactive power control and voltage/frequency ride-through that provide grid support benefits. Challenges to adoption include developing interoperability standards and ensuring safety. Advancements in PV inverters include the shift from string to micro inverters. Other applications of inverter technology include air conditioners, microwaves, welding equipment and electric vehicles.
Small wind electric systems can provide homeowners with renewable energy and lower electricity bills. They generally consist of a rotor, generator, tower, and other balance of system components like batteries or connections to the electric grid. The size of the turbine's rotor determines how much power it can produce, with systems ranging from under 1 kW for battery charging up to 300 kW for institutional use. Taller towers capture higher wind speeds but also increase costs and risk damage in hurricanes. Successful small wind projects in India have shown that depending on wind resources, homeowners can reduce their electricity bills by 50-90% with these systems.
Muhammad Usman is an electrical engineer with over 7 years of experience in electrical maintenance of power generation equipment, including generators, transformers, switchgears, and circuit breakers. He has worked on projects for KAPCO Power Company and Ali Murtaza Associates Pvt Ltd, maintaining and testing electrical systems. Usman holds a B.E. in Electrical Engineering from Hajvery University Lahore and is registered with the Pakistan Engineering Council.
SOLAR STREET LIGHTING SYSTEM SHOULD BE USED TO DECREASE THE ENERGY DEMAND IN HIGHWAYS ALSO RENEWABLE ENERGY SOURCES CAN BE UTILIZED MORE AND MORE TO REDUCE THE MASSIVE USES OF FOSSIL FUELS WHICH ARE EXTINGUISHABLE.
Learn what is a contactor, its components, types and working principle. A contactor is an electrical device that is used to turn on and off an electrical circuit. It is regarded as a unique sort of relay.
Solar powered automatic street light controller reportAmar Gupta
The document is a project report on a solar energy based automatic street light controller submitted by Amar Gupta, Manisha Bagani, and Varun Shah. It describes the controller's use of a 555 timer IC wired as a monostable multivibrator to automatically turn street lights on at dusk when detected by an LDR light sensor, and off at dawn. When dark, the LDR increases resistance to trigger the 555 IC and relay to power the lights from the solar panel energy storage. It saves around 40% of electricity costs compared to regular street lights.
Project 6: Automatic Street Light ControllerParesh Goel
This document describes a project to build an automatic street light controller. It uses a light dependent resistor (LDR) and Arduino board to sense light levels and control an LED. When the LDR senses darkness, the circuit powers an LED. In daylight, the LED turns off. This automatic system saves time and electricity compared to manual control, and ensures lights are always operated punctually. The parts list and 8 steps show how to assemble the circuit on a breadboard and program the Arduino board to read the LDR sensor and control the LED.
The document discusses different types of solar inverters used in photovoltaic power plants. It describes string inverters, central inverters, microinverters, and battery inverters. For each type, it provides details on how they work and their advantages and disadvantages. The document also discusses factors to consider when selecting an appropriate inverter, such as power rating and efficiency.
Leakage current in transformerless PV invetersSuresh Sunny
This document discusses leakage current in transformerless PV inverters. It first explains the importance of transformerless PV inverters, noting their high conversion efficiency, small size, low leakage current, and other advantages. It then discusses sources of leakage current such as parasitic capacitance between PV panels and ground. Various inverter topologies that provide high efficiency and low leakage current are presented, including isolated designs that reduce leakage current during zero voltage intervals. Analysis of leakage current in different topologies is also covered through equivalent circuit models. Standards for maximum allowable leakage current are mentioned for safety reasons.
The document discusses which media institution would be best for distributing a new horror film product aimed at a British audience. It suggests that British institutions like Film 4, Channel 4 or Channel 5 would be more suitable than global companies because the film is targeting a British viewership. Film 4 is identified as the best option as it solely focuses on films, frequently shows horror genres, is a successful British institution with 18 million subscribed households, and allows free access for young target audiences.
A nonisolated three port dc–dc converter and three-domain control method for ...LeMeniz Infotech
A nonisolated three port dc–dc converter and three-domain control method for pv-battery power systems
Do Your Projects With Technology Experts...
To Get this projects Call : 9566355386 / 99625 88976
Visit : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
Ethereum: A decentralized software platform for people and thingsAlexander Hirner
Blockchain 2.0 technologies promise to be the new layer for federated and accountable networks. At the Global IoT day 2015, I presented the motivation for decentralized but data-based business models and where / where not Ethereum fits into this picture.
Video: https://youtu.be/EGrFZuTrVKg?t=39s
This document discusses using technology to support inquiry-based learning. It provides goals of understanding inquiry-based learning and providing technology tools to support it. Some ways technology can be used include engaging students inside and outside the classroom, flipped learning, communication, supplemental resources, creative projects, teaching 21st century skills, and making inquiry-based lessons. Technology should support, not replace, content. Inquiry-based learning involves asking questions, including "ungoogleable" questions students generate. Videos, pictures and discussions can inspire essential questions to drive student research and projects on topics. Students may create video essays demonstrating their research.
Este documento menciona diferentes sistemas operativos y navegadores web, incluyendo Windows, IOS, Linux, Unix, Ubuntu y Android, así como navegadores como Chromium y Konqueror.
Miss Robinson Eng AA Art Interpretations MissRobinson
This document lists the names of 6 artists from different time periods, including Frank Dicksee and William Hatherell from the late 1800s/early 1900s, Hand Makart from the 1800s, and Kyle Walters and two unknown artists from unknown time periods.
Strong Nuclear Force and Quantum Vacuum as Gravity (FUNDAMENTAL TENSOR)SergioPrezFelipe
Publication at ccsenet. Gravity explained by a new theory, ‘Superconducting String Theory (SST)’, completely opposite from current field emission based and inspired on originals string theories. Strengths are decomposed to make strings behave as one-dimensional structure with universe acting as a superconductor where resistance is near 0 and the matter moves inside. Strong nuclear force, with an attraction of 10.000 Newtons is which makes space to curve, generating acceleration, more matter more acceleration. Electromagnetic moves in 8 decimals, gravity is moved to more than 30 decimals to work as a superconductor.
Customer Experiences with Soul - Sustainable Cosmetics KeynoteHolonomics
Companies believe they provide superior customer experiences, but only 8% of customers agree. When customers are aware of sustainability programs, the Net Promoter Score doubles. Great companies design customer experiences with soul by connecting their organization's soul to each part of the customer experience, creating living, authentic brands.
Sản xuất thiết bị điện công nghiệp vattuthietbidien.vn ống luồn dây điện thé...nguyencvl
1. The document provides information on colored and steel conduit products from Cat Van Loi including specifications, sizes, and standards.
2. Product information is given for electrical metallic tubing (EMT), intermediate metal conduit (IMC), and various screwed conduit types from standards like BS31, BS4568, and JISC8305.
3. Details are also provided on conduit bending machines that can bend the listed conduit sizes.
Grid current-feedback active damping for lcl resonance in grid-connected volt...LeMeniz Infotech
Grid-Current-Feedback Active Damping for LCL Resonance in Grid-Connected Voltage-Source Converters
This paper investigates active damping of LCL-filter resonance in a grid-connected voltage-source converter with only grid-current feedback control. Basic analysis in the s-domain shows that the proposed damping technique with a negative high-pass filter along its damping path is equivalent to adding a virtual impedance across the grid-side inductance. This added impedance is more precisely represented by a series RL branch in parallel with a negative inductance. The negative inductance helps to mitigate phase lag caused by time delays found in a digitally controlled system. The mitigation of phase-lag, in turn, helps to shrink the region of nonminimum-phase behavior caused by negative virtual resistance inserted unintentionally by most digitally implemented active damping techniques. The presented high-pass-filtered active damping technique with a single grid-current feedback loop is thus a more effective technique, whose systematic design in the z-domain has been developed in this paper. For verification, experimental testing has been performed with results obtained matching the theoretical expectations closely.
Web : http://www.lemenizinfotech.com
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Web : http://www.lemenizinfotech.com/power-system-ieee-projects-2016-2017/
Web : http://ieeemaster.com/power-system-ieee-projects-2016-2017/
Address: 36, 100 Feet Road(Near Indira Gandhi Statue), Natesan Nagar, Pondicherry-605 005
Contact numbers: +91 95663 55386, 99625 88976 (0413) 420 5444
Mail : projects@lemenizinfotech.com
Mobile : 9566355386 / 9962588976
Highly reliable transformerless photovoltaic inverters with leakage current a...LeMeniz Infotech
Highly Reliable Transformerless Photovoltaic Inverters With Leakage Current and Pulsating Power Elimination
This paper presents a transformerless inverter topology, which is capable of simultaneously solving leakage current and pulsating power issues in grid-connected photovoltaic (PV) systems. Without adding any additional components to the system, the leakage current caused by the PV-to-ground parasitic capacitance can be bypassed by introducing a common-mode (CM) conducting path to the inverter. The resulting ground leakage current is therefore well controlled to be below the regulation limit. Furthermore, the proposed inverter can also eliminate the well-known double-line-frequency pulsating power that is inherent in single-phase PV systems. By properly injecting CM voltages to the output filter capacitors, the pulsating power can be decoupled from the dc-link. Therefore, it is possible to use long-lifetime film capacitors instead of electrolytic capacitors to improve the reliability of the PV system. The mechanism of leakage current suppression and the closed-loop control of pulsating power decoupling are discussed in this paper in detail. A 500-W prototype was also built and tested in the laboratory, and both simulation and experimental results are finally presented to show the excellent performance of the proposed PV inverter.
Web : http://www.lemenizinfotech.com
Web : http://ieeemaster.com
Web : http://www.lemenizinfotech.com/power-system-ieee-projects-2016-2017/
Web : http://ieeemaster.com/power-system-ieee-projects-2016-2017/
Address: 36, 100 Feet Road(Near Indira Gandhi Statue), Natesan Nagar, Pondicherry-605 005
Contact numbers: +91 95663 55386, 99625 88976 (0413) 420 5444
Mail : projects@lemenizinfotech.com
Mobile : 9566355386 / 9962588976
Wave 3 - When Did We Start Trusting Strangers | UM | Social Media TrackerUM Wave
Wave 3 - When did we Start Trusting Strangers charted the democratisation of influence, how social media was driving greater means and opportunity for consumers to influence their peers.
Find the latest Wave, "Wave 7 - Cracking the Social Code" here http://www.slideshare.net/Wave7
Topology review and derivation methodology of single phase transformerless ph...LeMeniz Infotech
This document discusses transformerless photovoltaic inverters for leakage current suppression. It analyzes the generation and suppression of leakage current in single-phase transformerless PV inverters. It also surveys and compares state-of-the-art transformerless inverter topologies. Additionally, it proposes both DC-based and AC-based decoupling networks to establish innovative inverter topologies and derives a family of clamped highly efficient and reliable inverter concept-based designs. The document provides background on existing half-bridge converter topologies and describes the proposed system, advantages, applications, block diagram, and design tools.
A novel switched coupled-inductor dc–dc step-up converter and its derivativesLeMeniz Infotech
This document describes a novel switched-coupled-inductor DC-DC step-up converter that uses a coupled inductor to efficiently increase voltage conversion ratio. It proposes a design with a coupled inductor, voltage lift circuit, and single active switch to transfer energy both when the switch is on and off. This recycles leakage energy and avoids voltage spikes. The converter is intended for applications like DC drives and battery charging systems.
An isolated three port bidirectional dc-dc converter for photovoltaic systems...LeMeniz Infotech
This document discusses a proposed three-port bidirectional DC-DC converter for photovoltaic systems with energy storage. The converter uses an inductor-capacitor-inductor resonant circuit to achieve zero-current switching and reduce losses. It integrates a photovoltaic panel, battery storage, and load. A maximum power point tracking algorithm controls the photovoltaic panel and a charge/discharge controller manages the battery to provide or absorb surplus power. The converter aims to improve efficiency through lower component counts and voltage stresses compared to separate converters for each power source.
Efficient single phase transformerless inverter for grid tied pvg system with...LeMeniz Infotech
This document describes a proposed transformer-less inverter topology for grid-tied photovoltaic systems. The existing dual-parallel buck converter topology has issues where the grid can short circuit if there is no dead time between switches. The proposed topology addresses this by using six MOSFET switches and six diodes in a configuration that allows reactive power injection while overcoming reliability issues. It has advantages like utilizing only MOSFET switches, low leakage current, and not requiring PWM dead times. The proposed single-phase inverter is intended for grid-tied PV applications.
Minimization of the dc component in transformerless three phase grid-connecte...LeMeniz Infotech
Minimization of the dc component in transformerless three phase grid-connected photovoltaic inverters
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Dc–dc converter for dual voltage automotive systems based on bidirectional hy...LeMeniz Infotech
Dc–dc converter for dual voltage automotive systems based on bidirectional hybrid switched-capacitor architectures
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A single stage ccm zeta microinverter for solar photovoltaic ac moduleLeMeniz Infotech
A single stage ccm zeta microinverter for solar photovoltaic ac module
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Steady state analysis of a zvs bidirectional isolated three phase dc-dc conve...LeMeniz Infotech
Steady state analysis of a zvs bidirectional isolated three phase dc-dc converter using dual phase-shift control with variable duty cycle
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Single inductor dual buck full bridge inverter
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Three port dc–dc converter for stand-alone photovoltaic systemsLeMeniz Infotech
Three port dc–dc converter for stand-alone photovoltaic systems
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Discontinuous modulation scheme for a differential mode cuk inverterLeMeniz Infotech
Discontinuous modulation scheme for a differential mode cuk inverter
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A high gain input parallel output-series dcdc converter with dual coupled ind...LeMeniz Infotech
A high gain input parallel output-series dcdc converter with dual coupled inductors
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Resonance analysis and soft switching design of isolated boost converter with...LeMeniz Infotech
Resonance analysis and soft switching design of isolated boost converter with coupled inductors for vehicle inverter application
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Analysis of the interleaved isolated boost converter with coupled inductorsLeMeniz Infotech
Analysis of the interleaved isolated boost converter with coupled inductors
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This document proposes a multicell switched-inductor/switched-capacitor combined active network converter (MSL/SC-ANC) for high step-up voltage conversion with high efficiency. The MSL/SC-ANC structure combines the advantages of switched inductor cells, switched capacitor cells, and active networks to provide high voltage gain with low voltage and current stress on devices. It can achieve flexible voltage conversion by adjusting the number of switched inductor and capacitor cells. The proposed converter has applications in photovoltaics, fuel cells, and other areas requiring high voltage step-up conversion.
A cascade point of load dc dc converter with a novel phase shifted switched c...LeMeniz Infotech
A cascade point of load dc dc converter with a novel phase shifted switched capacitor converter output stage
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A novel high step up dcdc converter based on integrating coupled inductor and...LeMeniz Infotech
This document proposes a novel high step-up DC/DC converter for renewable energy applications. The proposed converter uses a coupled inductor and two voltage multiplier cells to achieve high voltage gain. It also uses a capacitor to store additional energy from the coupled inductor during the switch-off period, further increasing voltage transfer. A passive clamp circuit recycles energy from the leakage inductor. This reduces voltage stress on the main switch and allows use of a lower resistance switch to reduce conduction losses. The converter is suitable for applications like photovoltaics, fuel cells, and wind power.
Reliability evaluation of conventional and interleaved dc–dc boost convertersLeMeniz Infotech
Reliability evaluation of conventional and interleaved dc–dc boost converters
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Hybrid transformer zvszcs dc–dc converter with optimized magnetics and improv...LeMeniz Infotech
Hybrid transformer zvszcs dc–dc converter with optimized magnetics and improved power devices utilization for photovoltaic module applications
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Similar to A high efficiency mosfet transformerless inverter for nonisolated microinverter applications (20)
A fast acquisition all-digital delay-locked loop using a starting-bit predict...LeMeniz Infotech
A Fast-Acquisition All-Digital Delay-Locked Loop Using a Starting-Bit Prediction Algorithm for the Successive-Approximation Register
This brief presents a fast-acquisition 11-bit all-digital delay-locked loop (ADDLL) using a novel starting-bit prediction algorithm for the successive-approximation register (SBP-SAR). It can effectively eliminate the harmonic lock and the false lock. The achievable acquisition time is within 17.5-23.5 or 17.5-32.5 clock cycles when the ADDLL works at the low or high clock rate, respectively. The digital-controlled delay line and the SBP-SAR of the ADDLL chip are synthesized using Taiwan Semiconductor Manufacturing Company's (TSMC's) 0.18-μm CMOS cell library. The proposed ADDLL can operate at a clock frequency from 60 MHz to 1.1 GHz.
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A fast fault tolerant architecture for sauvola local image thresholding algor...LeMeniz Infotech
This document describes a proposed stochastic implementation of the Sauvola local image thresholding algorithm to reduce area, power consumption, and faults compared to a conventional implementation. The stochastic implementation converts pixel values and intermediate results to stochastic bit streams, uses stochastic multiplying counters (SMCs) to calculate averages and standard deviations in parallel, and a stochastic comparator to determine binary output values. Experimental results using Xilinx 14.2 show the stochastic implementation requires less time, area and power while being more fault tolerant.
A dynamically reconfigurable multi asip architecture for multistandard and mu...LeMeniz Infotech
A Dynamically Reconfigurable Multi-ASIP Architecture for Multistandard and Multimode Turbo Decoding
The multiplication of wireless communication standards is introducing the need of flexible and reconfigurable multistandard baseband receivers. In this context, multiprocessor turbo decoders have been recently developed in order to support the increasing flexibility and throughput requirements of emerging applications. However, these solutions do not sufficiently address reconfiguration performance issues, which can be a limiting factor in the future. This brief presents the design of a reconfigurable multiprocessor architecture for turbo decoding achieving very fast reconfiguration without compromising the decoding performances.
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Interleaved digital power factor correction based on the sliding mode approachLeMeniz Infotech
Interleaved Digital Power Factor Correction Based on the Sliding-Mode Approach
This study describes a digitally controlled power factor correction (PFC) system based on two interleaved boost converters operating with pulsewidth modulation (PWM). Both converters are independently controlled by an inner control loop based on a discrete-time sliding-mode (SM) approach that imposes loss-free resistor (LFR) behavior on each cell. The switching surface implements an average current-mode controller so that the power factor (PF) is high. The SM-based digital controller is designed to operate at a constant switching frequency so that the interleaving technique, which is recommended for ac-dc power conversion systems higher than 1 kW, can be readily applied. An outer loop regulates the output voltage by means of a discrete-time proportional-integral (PI) compensator directly obtained from a discrete-time small-signal model of the ideal sliding dynamics. The control law proposed has been validated using numerical simulations and experimental results in a 2-kW prototype.
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Bumpless control for reduced thd in power factor correction circuitsLeMeniz Infotech
Bumpless Control for Reduced THD in Power Factor Correction Circuits
It is well known that power factor correction (PFC) circuits suffer from two fundamentally different operating modes over a given AC input cycle. These two modes, continuous conduction mode (CCM) and discontinuous conduction mode (DCM), have very different frequency-response characteristics that can make control design for PFC circuits challenging. The problem is exacerbated by attempts to improve efficiency by dynamically adjusting the PWM switching frequency based on the load. Adjusting the PWM frequency based on the load limits controller bandwidth and restricts dynamic performance. Prior work has made use of multiple controllers, however, they have not addressed the discontinuity (bump) that exists when switching between controllers. In this paper, bumpless controllers will be synthesized for a 750 watt, semi-bridgeless PFC for the CCM-DCM operating modes.
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A bidirectional single stage three phase rectifier with high-frequency isolat...LeMeniz Infotech
A bidirectional single-stage three-phase Rectifier with high-frequency Isolation and power factor Correction
This paper proposes a single-stage three-phase rectifier with high-frequency isolation, power factor correction, and bidirectional power flow. The presented topology is adequate for dc grids (or smart-grids), telecommunications (telecom) power supplies, and more recent applications such as electric vehicles. The converter is based on the three-phase version of the dual active bridge (DAB) associated with the three-state-switching cell (3SSC), whose power flow between the primary and secondary sides is controlled by the phase-shift angle. A theoretical analysis is presented and validated through simulation and experimental.
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A bidirectional three level llc resonant converter with pwam controlLeMeniz Infotech
A Bidirectional Three-Level LLC Resonant Converter With PWAM Control
This paper proposes a bidirectional three-level LLC resonant converter with a new pulse width and amplitude modulation control method. With different control signals, it has three different operation modes with different voltage gains. Therefore, it can achieve wide voltage gain range by switching among these three modes, which is attractive for energy storage system applications needing wide voltage variation. The proposed topology operates with constant switching frequency, which is easy to implement with digital control, and it can achieve soft switching for all the switches and diodes in the circuit as a conventional LLC resonant converter. The performance of the proposed converter is validated by the experimental results from a 1-kW prototype with 20 A maximum output current.
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Delay dependent stability of single-loop controlled grid-connected inverters ...LeMeniz Infotech
Delay-Dependent Stability of Single-Loop Controlled Grid-Connected Inverters with LCL Filters
LCL filters have been widely used for grid-connected inverters. However, the problem that how time delay affects the stability of digitally controlled grid-connected inverters with LCL filters has not been fully studied. In this paper, a systematic study is carried out on the relationship between the time delay and stability of single-loop controlled grid-connected inverters that employ inverter current feedback (ICF) or grid current feedback (GCF). The ranges of time delay for system stability are analyzed and deduced in the continuous s-domain and discrete z-domain. It is shown that in the optimal range, the existence of time delay weakens the stability of the ICF loop, whereas a proper time delay is required for the GCF loop. The present work explains, for the first time, why different conclusions on the stability of ICF loop and GCF loop have been drawn in previous studies. To improve system stability, a linear predictor-based time delay reduction method is proposed for ICF, while a time delay addition method is used for GCF. A controller design method is then presented that guarantees adequate stability margins. The delay-dependent stability study is verified by simulation and experiment.
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Connection of converters to a low and medium power dc network using an induct...LeMeniz Infotech
Connection of Converters to a Low and Medium Power DC Network Using an Inductor Circut
This paper describes an alternative to connect power converters to a direct-current network with an inductor circuit. The circuit allows the connection of converters through a coil and avoids short-circuit currents with different instantaneous values of voltage output. A description of the calculation and the choice of components together with a real implemented example in a dc network within Smart City project (Endesa Utility) is presented
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Sbvlc secure barcode based visible light communication for smartphonesLeMeniz Infotech
This document summarizes a research paper that proposes SBVLC, a secure system for barcode-based visible light communication between smartphones. It analyzes the security of transmitting barcode streams between device screens and cameras. Three secure data exchange schemes are developed to encode information in barcode streams. The system achieves high security and throughput comparable to NFC. It can enable private information sharing, secure device pairing and contactless payments. Rigorous geometric models were used to examine the system's security, making it the first work to formally study security of VLC and barcode communication between smartphones.
Read2 me a cloud based reading aid for the visually impairedLeMeniz Infotech
Read2Me A Cloud based Reading Aid for the Visually Impaired
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Pass byo bring your own picture for securing graphical passwordsLeMeniz Infotech
This document describes PassBYOP, a new graphical password scheme that uses live video of a physical token (such as a photo on a mobile phone) rather than static digital images. Three feasibility studies examine its reliability, usability, and security against observation attacks. Results found passwords based on image features to be viable, with task times and error rates comparable to prior schemes. Using a user-owned physical token increased security against observation without additional user burden, showing promise for more secure graphical passwords.
The document discusses analyzing ad library updates in Android apps. It finds that almost half of Android apps underwent ad library updates over a 12 month period, where an ad library was added, removed, or updated. For nearly 14% of app updates with an ad library update, no changes were made to the app's core functionality, suggesting maintaining ad libraries requires substantial effort. The proposed system compares how apps are updated over time to determine if an update includes ad library changes, core changes, or both.
Context based access control systems for mobile devicesLeMeniz Infotech
Context based access control systems for mobile devices
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Android security a survey of issues, malware penetration, and defensesLeMeniz Infotech
Android security a survey of issues, malware penetration, and defenses
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A location and diversity-aware news feed system for mobile usersLeMeniz Infotech
A location and diversity-aware news feed system for mobile users
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Walmart Business+ and Spark Good for Nonprofits.pdfTechSoup
"Learn about all the ways Walmart supports nonprofit organizations.
You will hear from Liz Willett, the Head of Nonprofits, and hear about what Walmart is doing to help nonprofits, including Walmart Business and Spark Good. Walmart Business+ is a new offer for nonprofits that offers discounts and also streamlines nonprofits order and expense tracking, saving time and money.
The webinar may also give some examples on how nonprofits can best leverage Walmart Business+.
The event will cover the following::
Walmart Business + (https://business.walmart.com/plus) is a new shopping experience for nonprofits, schools, and local business customers that connects an exclusive online shopping experience to stores. Benefits include free delivery and shipping, a 'Spend Analytics” feature, special discounts, deals and tax-exempt shopping.
Special TechSoup offer for a free 180 days membership, and up to $150 in discounts on eligible orders.
Spark Good (walmart.com/sparkgood) is a charitable platform that enables nonprofits to receive donations directly from customers and associates.
Answers about how you can do more with Walmart!"
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Chapter wise All Notes of First year Basic Civil Engineering.pptxDenish Jangid
Chapter wise All Notes of First year Basic Civil Engineering
Syllabus
Chapter-1
Introduction to objective, scope and outcome the subject
Chapter 2
Introduction: Scope and Specialization of Civil Engineering, Role of civil Engineer in Society, Impact of infrastructural development on economy of country.
Chapter 3
Surveying: Object Principles & Types of Surveying; Site Plans, Plans & Maps; Scales & Unit of different Measurements.
Linear Measurements: Instruments used. Linear Measurement by Tape, Ranging out Survey Lines and overcoming Obstructions; Measurements on sloping ground; Tape corrections, conventional symbols. Angular Measurements: Instruments used; Introduction to Compass Surveying, Bearings and Longitude & Latitude of a Line, Introduction to total station.
Levelling: Instrument used Object of levelling, Methods of levelling in brief, and Contour maps.
Chapter 4
Buildings: Selection of site for Buildings, Layout of Building Plan, Types of buildings, Plinth area, carpet area, floor space index, Introduction to building byelaws, concept of sun light & ventilation. Components of Buildings & their functions, Basic concept of R.C.C., Introduction to types of foundation
Chapter 5
Transportation: Introduction to Transportation Engineering; Traffic and Road Safety: Types and Characteristics of Various Modes of Transportation; Various Road Traffic Signs, Causes of Accidents and Road Safety Measures.
Chapter 6
Environmental Engineering: Environmental Pollution, Environmental Acts and Regulations, Functional Concepts of Ecology, Basics of Species, Biodiversity, Ecosystem, Hydrological Cycle; Chemical Cycles: Carbon, Nitrogen & Phosphorus; Energy Flow in Ecosystems.
Water Pollution: Water Quality standards, Introduction to Treatment & Disposal of Waste Water. Reuse and Saving of Water, Rain Water Harvesting. Solid Waste Management: Classification of Solid Waste, Collection, Transportation and Disposal of Solid. Recycling of Solid Waste: Energy Recovery, Sanitary Landfill, On-Site Sanitation. Air & Noise Pollution: Primary and Secondary air pollutants, Harmful effects of Air Pollution, Control of Air Pollution. . Noise Pollution Harmful Effects of noise pollution, control of noise pollution, Global warming & Climate Change, Ozone depletion, Greenhouse effect
Text Books:
1. Palancharmy, Basic Civil Engineering, McGraw Hill publishers.
2. Satheesh Gopi, Basic Civil Engineering, Pearson Publishers.
3. Ketki Rangwala Dalal, Essentials of Civil Engineering, Charotar Publishing House.
4. BCP, Surveying volume 1
Main Java[All of the Base Concepts}.docxadhitya5119
This is part 1 of my Java Learning Journey. This Contains Custom methods, classes, constructors, packages, multithreading , try- catch block, finally block and more.
Temple of Asclepius in Thrace. Excavation resultsKrassimira Luka
The temple and the sanctuary around were dedicated to Asklepios Zmidrenus. This name has been known since 1875 when an inscription dedicated to him was discovered in Rome. The inscription is dated in 227 AD and was left by soldiers originating from the city of Philippopolis (modern Plovdiv).
How to Setup Warehouse & Location in Odoo 17 InventoryCeline George
In this slide, we'll explore how to set up warehouses and locations in Odoo 17 Inventory. This will help us manage our stock effectively, track inventory levels, and streamline warehouse operations.
Philippine Edukasyong Pantahanan at Pangkabuhayan (EPP) CurriculumMJDuyan
(𝐓𝐋𝐄 𝟏𝟎𝟎) (𝐋𝐞𝐬𝐬𝐨𝐧 𝟏)-𝐏𝐫𝐞𝐥𝐢𝐦𝐬
𝐃𝐢𝐬𝐜𝐮𝐬𝐬 𝐭𝐡𝐞 𝐄𝐏𝐏 𝐂𝐮𝐫𝐫𝐢𝐜𝐮𝐥𝐮𝐦 𝐢𝐧 𝐭𝐡𝐞 𝐏𝐡𝐢𝐥𝐢𝐩𝐩𝐢𝐧𝐞𝐬:
- Understand the goals and objectives of the Edukasyong Pantahanan at Pangkabuhayan (EPP) curriculum, recognizing its importance in fostering practical life skills and values among students. Students will also be able to identify the key components and subjects covered, such as agriculture, home economics, industrial arts, and information and communication technology.
𝐄𝐱𝐩𝐥𝐚𝐢𝐧 𝐭𝐡𝐞 𝐍𝐚𝐭𝐮𝐫𝐞 𝐚𝐧𝐝 𝐒𝐜𝐨𝐩𝐞 𝐨𝐟 𝐚𝐧 𝐄𝐧𝐭𝐫𝐞𝐩𝐫𝐞𝐧𝐞𝐮𝐫:
-Define entrepreneurship, distinguishing it from general business activities by emphasizing its focus on innovation, risk-taking, and value creation. Students will describe the characteristics and traits of successful entrepreneurs, including their roles and responsibilities, and discuss the broader economic and social impacts of entrepreneurial activities on both local and global scales.
Leveraging Generative AI to Drive Nonprofit InnovationTechSoup
In this webinar, participants learned how to utilize Generative AI to streamline operations and elevate member engagement. Amazon Web Service experts provided a customer specific use cases and dived into low/no-code tools that are quick and easy to deploy through Amazon Web Service (AWS.)