This document discusses microwave power transmission (MPT) as a next generation power transmission system. MPT works by transmitting power via microwaves from one location to another without wires, which could help reduce transmission and distribution losses. Nikola Tesla first conceived of wireless power transmission in the late 19th century. Recent experiments have demonstrated transmitting tens of kilowatts of power wirelessly over distances. MPT uses a microwave generator, transmitting antenna, and receiving antenna called a rectenna which converts the microwaves to DC power. Advantages of MPT include eliminating transmission lines and facilities, increasing transmission efficiency, and providing power access to remote areas.
Wireless Power Transmission using Solar Power Satelliteijtsrd
From this paper we can transfer the power to earth without using any wires using satellite based system.by this satellite solar power based system we can reduce the transmission and distri bution losses .by this system we can get more effi ciency of power for future generations.in this paper we can study the various components of satellite based system and projects this technology as a bulk source of power generation in future. With the help of sps system we can reduce the costs of lines and get more efficiency of power for future resources A. Manikanta | B. Prasad | Ch. Sai Kumar | E. Praveena "Wireless Power Transmission using Solar Power Satellite" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-1 , December 2019, URL: https://www.ijtsrd.com/papers/ijtsrd29846.pdf Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/29846/wireless-power-transmission-using-solar-power-satellite/a-manikanta
Magnetic Shield Influence on Wireless Power DesignsWPEU
Chris Burket presents Magnetic Shield Influence on Low Power Wireless Power Designs as part of the International Wireless Power Summit 2013 in Austin, Texas.
Non-radiative wireless energy transfer with single layer dual-band printed sp...journalBEEI
Accomplishing equilibrium in terms of transfer efficiency for dual-band wireless energy transfer (WET) system remains as one of key concerns particularly in the implementation of a single transmitter device which supports simultaneous energy and data transfer functionality. Three stages of design method are discussed in addressing the aforementioned concern. A single layer dual-band printed spiral resonator for non-radiative wireless energy transfer operating at 6.78 MHz and 13.56 MHz is presented. By employing multi-coil approach, measured power transfer efficiency for a symmetrical link separated at axial distance of 30 mm are 72.34% and 74.02% at the respective frequency bands. When operating distance is varied between 30 mm to 38 mm, consistency of simulated peak transfer efficiency above 50% is achievable.
One of the major issue in power system is the losses occurs during the transmission and distribution of electrical power. As the demand increases day by day, the power generation increases and the power loss is also increased. The major amount of power loss occurs during transmission and distribution. The percentage of loss of power during transmission and distribution is approximated as 26%. The main reason for power loss during transmission and distribution is the resistance of wires used for grid. The efficiency of power transmission can be improved to certain level by using high strength composite overhead conductors and underground cables that use high temperature super conductor. But, the transmission is still inefficient. According to the World Resources Institute (WRI), India’s electricity grid has the highest transmission and distribution losses in the world – a whopping 27%. Numbers published by various Indian government agencies put that number at 30%,40% and greater than 40%. This is attributed to technical losses (grid’s inefficiencies) and theft. Any problem can be solved by state of the art technology. The above discussed problem can be solvedby choose an alternative option for power transmission which could provide much higher efficiency, low transmission cost and avoid power theft. Microwave Power Transmission is one of the promising technologies and may be the righteous alternative for efficient power transmission.
Wireless Power Transmission using Solar Power Satelliteijtsrd
From this paper we can transfer the power to earth without using any wires using satellite based system.by this satellite solar power based system we can reduce the transmission and distri bution losses .by this system we can get more effi ciency of power for future generations.in this paper we can study the various components of satellite based system and projects this technology as a bulk source of power generation in future. With the help of sps system we can reduce the costs of lines and get more efficiency of power for future resources A. Manikanta | B. Prasad | Ch. Sai Kumar | E. Praveena "Wireless Power Transmission using Solar Power Satellite" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-1 , December 2019, URL: https://www.ijtsrd.com/papers/ijtsrd29846.pdf Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/29846/wireless-power-transmission-using-solar-power-satellite/a-manikanta
Magnetic Shield Influence on Wireless Power DesignsWPEU
Chris Burket presents Magnetic Shield Influence on Low Power Wireless Power Designs as part of the International Wireless Power Summit 2013 in Austin, Texas.
Non-radiative wireless energy transfer with single layer dual-band printed sp...journalBEEI
Accomplishing equilibrium in terms of transfer efficiency for dual-band wireless energy transfer (WET) system remains as one of key concerns particularly in the implementation of a single transmitter device which supports simultaneous energy and data transfer functionality. Three stages of design method are discussed in addressing the aforementioned concern. A single layer dual-band printed spiral resonator for non-radiative wireless energy transfer operating at 6.78 MHz and 13.56 MHz is presented. By employing multi-coil approach, measured power transfer efficiency for a symmetrical link separated at axial distance of 30 mm are 72.34% and 74.02% at the respective frequency bands. When operating distance is varied between 30 mm to 38 mm, consistency of simulated peak transfer efficiency above 50% is achievable.
One of the major issue in power system is the losses occurs during the transmission and distribution of electrical power. As the demand increases day by day, the power generation increases and the power loss is also increased. The major amount of power loss occurs during transmission and distribution. The percentage of loss of power during transmission and distribution is approximated as 26%. The main reason for power loss during transmission and distribution is the resistance of wires used for grid. The efficiency of power transmission can be improved to certain level by using high strength composite overhead conductors and underground cables that use high temperature super conductor. But, the transmission is still inefficient. According to the World Resources Institute (WRI), India’s electricity grid has the highest transmission and distribution losses in the world – a whopping 27%. Numbers published by various Indian government agencies put that number at 30%,40% and greater than 40%. This is attributed to technical losses (grid’s inefficiencies) and theft. Any problem can be solved by state of the art technology. The above discussed problem can be solvedby choose an alternative option for power transmission which could provide much higher efficiency, low transmission cost and avoid power theft. Microwave Power Transmission is one of the promising technologies and may be the righteous alternative for efficient power transmission.
Design of wireless power transfer system via magnetic resonant coupling at 13...Ajay Kumar Sah
Design of Wireless Power Transfer System via Magnetic Resonant Coupling at 13.56MHz
Abstract: Power is a must to modern systems. Power transmission through wires is common. But not in every field can wires be used because of certain limitations. The implantable biomedical devices like pacemakers, cardiac defibrillators, and artificial hearts require power supply for long term operation. The required power is supplied by driveline cable or by battery. WPT greatly reduces the risk of infection by eliminating the driveline cable which otherwise needs to puncture the skin to provide power and also saves the valuable space inside a person’s body in case of battery powered. In such fields, what we need is wireless transmission. Wireless transmission is useful in cases where instantaneous or continuous energy transfer is needed, but interconnecting wires are inconvenient, hazardous, or impossible. In this paper, a simple design method of a wireless power transfer system using 13.56 MHz ISM band is proposed. The proposed wireless power transfer system consists of rectifier, oscillator, power amplifier, power coil, load coil and two intermediate coils as transmitter antenna and receiver antenna inserted between power coil and load coil.
Analysis and optimization of wireless power transfer linkAjay Kumar Sah
In this paper, a high efficiency Gallium nitride (GaN), HEMT (High Electron Mobility Transistor) class-E power amplifier for the wireless power transfer link is designed and simulated on PSpice. A four-coil wireless power transfer link is modeled for maximum power transfer efficiency on ADS (Advanced Design System) and frequency splitting phenomenon is demonstrated, explained and analyzed. Two resonant coupling structures, series & mixed, are presented and compared. The efficiency performance of the link is studied using spiral and helical antennas of different wire make. In addition, techniques for improving efficiency of the wireless power transfer systems with changing coupling coefficient viz. frequency splitting phenomenon of the coils are proposed.
Designing an Antenna System That Can Perform Conditional RF to DC Harnessing ...IOSRJECE
Electromagnetic energy or RF energy will play a pivotal role in wireless technology and wireless communication in the impending future. The paper proposes a concept for a patch antenna based system that can harness RF energy upon triggering and can convert the harnessed RF to DC from the radio frequency of 1 GHz to 3 GHz, the design frequency is 2.4GHz. The patch antenna system contains a high gain patch antenna along with a wireless communicating module and a conversion circuit. The return loss of the antenna is approximately 27.1dB. The power gain is 30.1 dBm .The converter circuit is designed in), Multi-Sim to get an output voltage of around 5V that can be used to power a mobile-device or maybe stored in a battery. The triggering part is done with the help of a T-mote which is simulated in a network simulator, Cooja. The patch antenna is simulated in High Frequency Structural Simulator
In general a wireless power system consists of a "transmitter" connected to a source of power such as a mains power line, which converts the power to a time-varying electromagnetic field, and one or more "receiver" devices which receive the power and convert it back to DC or AC electric current which is used by an electrical load.
On the Viability Analysis of HVDC Light for Electrification of Mafia Island b...irjes
HVDC Light systems range from 3MW to about 1000MW transmission technology combining power converters and DC cables. The power converters are based on Voltage Source Converters (VSC) and Pulse Width Modulation (PWM) control. The use of series connection of power semiconductors such as IGBTs is fundamental to the development of the HVDC Light technology. HVDC Light is excellent for underground and under water power transmission. By use of HVDC Light power converters and cables, it is possible to overcome the technical difficulties to connect small loads and small scale generating units to the AC grid and to make the connection economical and environmentally friendly. This paper presents viability analysis of using HVDC Light technology for electrification of Mafia Ireland (Tanzania) from the national grid. In the paper the load demand forecast has been performed to estimate the load for the next 25 years at Mafia Island. HVDC Light model has been developed and simulated using MATLAB/Simulink software. The simulation results show that HVDC Light system performance is capable of delivering reliable and quality power when the Mafia Island is supplied by national grid using HVDC Light system. The benefits include more reliable power supply reduced environmental effects.
A new configuration of patch antenna array for rectenna array applicationsTELKOMNIKA JOURNAL
The performance and advantages of microstrip patch antennas made them a field of interest for wireless power transmission applications, especially for rectenna systems where the choice of the antenna is a crucial step. In this paper, a 5.8 GHz circularly polarized patch antenna has been designed and fabricated, then mounted by using 4 elements to achieve an antenna array to enhance the captured power to be converted by the rectifier circuit. The antenna array is well matched at 5.8 GHz in terms of reflection coefficient and has a directivity of 11 dB and a gain of 6 dB. Results have been confirmed by fabrication.
Challenges and Benefits of Integrating the Renewable Energy Technologies into...Power System Operation
In the recent decent, renewable energy has been becoming one of the independent energy sources in human life, and it will be a major resources for the future generation of power. Today, some people tend to use renewable energy in their home or land such as solar or wind energy. Most of those have two inputs of the power source; the utility power supply and renewable energy power supply, so the integration of renewable technologies variable generation sources within Ac grid has been made, but this connection is not easily reachable. This paper will be reviewed the challenges and benefits of integrating renewable energy into power system grid. A review of the integration process will be introduced. Also, the paper will discuss some difficulties that face the integration such as power quality requirements that must be achieved to get this connection successfully. Forecasting of renewable energy such availability of power at any time, the amount of variation in power output, the speed of variation, and the location of RE source are other challenges that may obstruct the successful incorporation of renewable energy and the grid. In addition, the paper will briefly show a device that can be used in homes to achieve this connection. Finally, advantages of the integration for both the power utility and the green energy owner will be present, and how this integration can affect our environment. Solar energy and wind energy will be used in this paper as examples of renewable energy. Keywords: grid, green energy, integration, global warming, renewable energy RE
Grid Interconnection of Renewable Energy Sources at the Distribution Level Wi...Pradeep Avanigadda
Renewable energy resources (RES) are being increasingly
connected in distribution systems utilizing power electronic
converters. This paper presents a novel control strategy for
achieving maximum benefits from these grid-interfacing inverters
when installed in 3-phase 4-wire distribution systems. The inverter
is controlled to perform as a multi-function device by incorporating
active power filter functionality. The inverter can thus be
utilized as: 1) power converter to inject power generated from
RES to the grid, and 2) shunt APF to compensate current unbalance,
load current harmonics, load reactive power demand and
load neutral current. All of these functions may be accomplished
either individually or simultaneously. With such a control, the
combination of grid-interfacing inverter and the 3-phase 4-wire
linear/non-linear unbalanced load at point of common coupling
appears as balanced linear load to the grid. This new control
concept is demonstrated with extensive MATLAB/Simulink simulation
studies and validated through digital signal processor-based
laboratory experimental results.
Index Terms—Active power filter
Hello Friends,
This PPT is all about terrorism and its roots, causes, effects and effective solution for stopping it. This information is for projects done by students at school.
Thanks for reading!
Design of wireless power transfer system via magnetic resonant coupling at 13...Ajay Kumar Sah
Design of Wireless Power Transfer System via Magnetic Resonant Coupling at 13.56MHz
Abstract: Power is a must to modern systems. Power transmission through wires is common. But not in every field can wires be used because of certain limitations. The implantable biomedical devices like pacemakers, cardiac defibrillators, and artificial hearts require power supply for long term operation. The required power is supplied by driveline cable or by battery. WPT greatly reduces the risk of infection by eliminating the driveline cable which otherwise needs to puncture the skin to provide power and also saves the valuable space inside a person’s body in case of battery powered. In such fields, what we need is wireless transmission. Wireless transmission is useful in cases where instantaneous or continuous energy transfer is needed, but interconnecting wires are inconvenient, hazardous, or impossible. In this paper, a simple design method of a wireless power transfer system using 13.56 MHz ISM band is proposed. The proposed wireless power transfer system consists of rectifier, oscillator, power amplifier, power coil, load coil and two intermediate coils as transmitter antenna and receiver antenna inserted between power coil and load coil.
Analysis and optimization of wireless power transfer linkAjay Kumar Sah
In this paper, a high efficiency Gallium nitride (GaN), HEMT (High Electron Mobility Transistor) class-E power amplifier for the wireless power transfer link is designed and simulated on PSpice. A four-coil wireless power transfer link is modeled for maximum power transfer efficiency on ADS (Advanced Design System) and frequency splitting phenomenon is demonstrated, explained and analyzed. Two resonant coupling structures, series & mixed, are presented and compared. The efficiency performance of the link is studied using spiral and helical antennas of different wire make. In addition, techniques for improving efficiency of the wireless power transfer systems with changing coupling coefficient viz. frequency splitting phenomenon of the coils are proposed.
Designing an Antenna System That Can Perform Conditional RF to DC Harnessing ...IOSRJECE
Electromagnetic energy or RF energy will play a pivotal role in wireless technology and wireless communication in the impending future. The paper proposes a concept for a patch antenna based system that can harness RF energy upon triggering and can convert the harnessed RF to DC from the radio frequency of 1 GHz to 3 GHz, the design frequency is 2.4GHz. The patch antenna system contains a high gain patch antenna along with a wireless communicating module and a conversion circuit. The return loss of the antenna is approximately 27.1dB. The power gain is 30.1 dBm .The converter circuit is designed in), Multi-Sim to get an output voltage of around 5V that can be used to power a mobile-device or maybe stored in a battery. The triggering part is done with the help of a T-mote which is simulated in a network simulator, Cooja. The patch antenna is simulated in High Frequency Structural Simulator
In general a wireless power system consists of a "transmitter" connected to a source of power such as a mains power line, which converts the power to a time-varying electromagnetic field, and one or more "receiver" devices which receive the power and convert it back to DC or AC electric current which is used by an electrical load.
On the Viability Analysis of HVDC Light for Electrification of Mafia Island b...irjes
HVDC Light systems range from 3MW to about 1000MW transmission technology combining power converters and DC cables. The power converters are based on Voltage Source Converters (VSC) and Pulse Width Modulation (PWM) control. The use of series connection of power semiconductors such as IGBTs is fundamental to the development of the HVDC Light technology. HVDC Light is excellent for underground and under water power transmission. By use of HVDC Light power converters and cables, it is possible to overcome the technical difficulties to connect small loads and small scale generating units to the AC grid and to make the connection economical and environmentally friendly. This paper presents viability analysis of using HVDC Light technology for electrification of Mafia Ireland (Tanzania) from the national grid. In the paper the load demand forecast has been performed to estimate the load for the next 25 years at Mafia Island. HVDC Light model has been developed and simulated using MATLAB/Simulink software. The simulation results show that HVDC Light system performance is capable of delivering reliable and quality power when the Mafia Island is supplied by national grid using HVDC Light system. The benefits include more reliable power supply reduced environmental effects.
A new configuration of patch antenna array for rectenna array applicationsTELKOMNIKA JOURNAL
The performance and advantages of microstrip patch antennas made them a field of interest for wireless power transmission applications, especially for rectenna systems where the choice of the antenna is a crucial step. In this paper, a 5.8 GHz circularly polarized patch antenna has been designed and fabricated, then mounted by using 4 elements to achieve an antenna array to enhance the captured power to be converted by the rectifier circuit. The antenna array is well matched at 5.8 GHz in terms of reflection coefficient and has a directivity of 11 dB and a gain of 6 dB. Results have been confirmed by fabrication.
Challenges and Benefits of Integrating the Renewable Energy Technologies into...Power System Operation
In the recent decent, renewable energy has been becoming one of the independent energy sources in human life, and it will be a major resources for the future generation of power. Today, some people tend to use renewable energy in their home or land such as solar or wind energy. Most of those have two inputs of the power source; the utility power supply and renewable energy power supply, so the integration of renewable technologies variable generation sources within Ac grid has been made, but this connection is not easily reachable. This paper will be reviewed the challenges and benefits of integrating renewable energy into power system grid. A review of the integration process will be introduced. Also, the paper will discuss some difficulties that face the integration such as power quality requirements that must be achieved to get this connection successfully. Forecasting of renewable energy such availability of power at any time, the amount of variation in power output, the speed of variation, and the location of RE source are other challenges that may obstruct the successful incorporation of renewable energy and the grid. In addition, the paper will briefly show a device that can be used in homes to achieve this connection. Finally, advantages of the integration for both the power utility and the green energy owner will be present, and how this integration can affect our environment. Solar energy and wind energy will be used in this paper as examples of renewable energy. Keywords: grid, green energy, integration, global warming, renewable energy RE
Grid Interconnection of Renewable Energy Sources at the Distribution Level Wi...Pradeep Avanigadda
Renewable energy resources (RES) are being increasingly
connected in distribution systems utilizing power electronic
converters. This paper presents a novel control strategy for
achieving maximum benefits from these grid-interfacing inverters
when installed in 3-phase 4-wire distribution systems. The inverter
is controlled to perform as a multi-function device by incorporating
active power filter functionality. The inverter can thus be
utilized as: 1) power converter to inject power generated from
RES to the grid, and 2) shunt APF to compensate current unbalance,
load current harmonics, load reactive power demand and
load neutral current. All of these functions may be accomplished
either individually or simultaneously. With such a control, the
combination of grid-interfacing inverter and the 3-phase 4-wire
linear/non-linear unbalanced load at point of common coupling
appears as balanced linear load to the grid. This new control
concept is demonstrated with extensive MATLAB/Simulink simulation
studies and validated through digital signal processor-based
laboratory experimental results.
Index Terms—Active power filter
Hello Friends,
This PPT is all about terrorism and its roots, causes, effects and effective solution for stopping it. This information is for projects done by students at school.
Thanks for reading!
The Fearsome Grip of Terrorism (Causes and Solutions)Karan Khanna
Here is a presentation to give an idea of the current scenario of terrorism, its causes and certain solutions to fight it.Hope that I can successfully express my views on the topic.
This slide has the brief overview regarding the Terrorism In Pakistan.
It's Types,Background,Causes,Effects Measures to stop terrorism & at the end Conclusion.
Made by the great effort plus contains the high quality visual Effects.
Wireless transmission of electricity development & possibilitychandan kumar
One of the major issue in power system is the losses occurs during the transmission and distribution of electrical power.
The percentage of loss of power during transmission and distribution is approximated as 26%.
The main reason for power loss during transmission and distribution is the resistance of wires used for grid.
Any problem can be solved by state–of-the-art technology.
Microwave Power Transmission is one of the promising technologies and may be the righteous alternative for efficient power transmission.
Today we live in a fast changing world. In present modern era power is very important role in our live system. The purpose of this paper practically implement concept of power transmission without wire. Wireless Power Transmission through inductive coupling is one of the new emerging technologies that will bring tremendous change in human life. Wireless power transfer is one of the simplest and inexpensive ways of charging as it eliminate the use of conventional copper cables and current carrying wires. Using inductive coupling concept an alternating current in transmitter coil generates a magnetic field which induces a voltage in the receiver coil. This voltage can be used to power a mobile device or charge a battery etc. Mrs. Jothy Mary Saji "Review Paper on Wireless Power Transfer" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-7 | Issue-4, August 2023, URL: https://www.ijtsrd.com/papers/ijtsrd58616.pdf Paper Url:https://www.ijtsrd.com/engineering/electronics-and-communication-engineering/58616/review-paper-on-wireless-power-transfer/mrs-jothy-mary-saji
Assistive technologies for efficient mid range wireless transmission of elect...eSAT Journals
Abstract The intention of this paper is to assist the understanding of Wireless Power Transmission in terms of the various techniques used to realize it. Regardless of the hardships in consummating this technology in day to day life, scientists have contemplated Wireless Power Transmission due to its benefits. Mid-range Wireless Power Transmission has been targeted in the paper due to its usefulness. This review paper will address the innovations made in the field recently that aided in achieving higher efficiency of transmission and longer ranges comprising the use of different coil shapes, metamaterials, resonator arrays, relays, multiple transmitter-receiver system and optimal antenna designing. Keywords: WPT-Wireless Power Transmission, SPS-Solar Power Satellite, HR-WPT- Highly-Resonant Wireless Power Transmission
Vehicles Charged Via Wireless Technology (Microwave Energy)ijsrd.com
Wireless Power Transmission (WPT) is an inchoate side in every sector of science & technology. In this paper we present a model of Electric Vehicle (EV) charging with the help of renewable energy source using this WPT. We present a configuration, consist of two optimized square loop wire antennas in communication &tuned at mutual frequency with aim of showing the improvement of the size of the batteries & the power efficiency over longer distance. Through this wireless function Electric Vehicle system (EVs) get charged by microwave beam from transmitter & then receiver will capture thus microwave beam. This is then transferred into DC power & electrochemical storage is finally used to store the power. In this Li-ion battery replaces traditional fossil fuel system of automotive vehicles.
Saving of Power in Wireless Power Transmission System using IR Sensor and RelayDr. Amarjeet Singh
As all we know that today’s live is not possible for a moment if we think without electricity after our basic needs that are air, water, food, cloth and shelter. Because without it we can not think about our mobility, But it has also many disadvantages because of the transmission of electricity through wire which cause many time sock due to which living thing may get injured or many time they get unexpected death.
Hence for establishing the transmission of electricity without hazards today’s world started working on the removal of the net of the wires over the world and this is possible only by transmitting electricity wirelessly.
This principle was early given by a charming and mysterious inventor and engineer Nikola Tesla(1891-1898) by inventing Tesla coil. But in wireless electricity transmission, there is a lot of wastage of energy when power is transferred to the load. If there is no loads are available around the receiving antenna(coil), power will be wasted and this is a one of the major disadvantage of this principle.
So by using IR Sensor we can save this power from being waste which will allow the antenna to transmit the power only when the objects are available to receive this transmitted power.
The wireless Power Transmission is a useful and proper technology is used in various fields like electronic devices, implantable medical devices, industry and other fields, and has become a research hotspot at home and abroad. Because it enables the transmission of electrical energy from a power source to an electrical load across an air gap without interconnecting wires. This paper reviews the methods used in the wireless power transmission system, recent technologies, future and its application, merits as well as demerits. Mrs. Yogita Shailesh Kadam "Wireless Power Transmission System- A Review" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-7 | Issue-3 , June 2023, URL: https://www.ijtsrd.com.com/papers/ijtsrd57380.pdf Paper URL: https://www.ijtsrd.com.com/engineering/electrical-engineering/57380/wireless-power-transmission-system-a-review/mrs-yogita-shailesh-kadam
* Provides an overview of the technologies, possibilities and uses of wireless power transmission.
* Presents an overview of past, present and future transmission systems.
* Discusses economical, ecological and social aspects of these systems.
* Focuses on wireless power transmission systems with microwaves in the power range of about 100 W to 100 kW.
* Suggests that further investigation into compatibility and safety is needed.
Builder.ai Founder Sachin Dev Duggal's Strategic Approach to Create an Innova...Ramesh Iyer
In today's fast-changing business world, Companies that adapt and embrace new ideas often need help to keep up with the competition. However, fostering a culture of innovation takes much work. It takes vision, leadership and willingness to take risks in the right proportion. Sachin Dev Duggal, co-founder of Builder.ai, has perfected the art of this balance, creating a company culture where creativity and growth are nurtured at each stage.
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
In this insightful webinar, Inflectra explores how artificial intelligence (AI) is transforming software development and testing. Discover how AI-powered tools are revolutionizing every stage of the software development lifecycle (SDLC), from design and prototyping to testing, deployment, and monitoring.
Learn about:
• The Future of Testing: How AI is shifting testing towards verification, analysis, and higher-level skills, while reducing repetitive tasks.
• Test Automation: How AI-powered test case generation, optimization, and self-healing tests are making testing more efficient and effective.
• Visual Testing: Explore the emerging capabilities of AI in visual testing and how it's set to revolutionize UI verification.
• Inflectra's AI Solutions: See demonstrations of Inflectra's cutting-edge AI tools like the ChatGPT plugin and Azure Open AI platform, designed to streamline your testing process.
Whether you're a developer, tester, or QA professional, this webinar will give you valuable insights into how AI is shaping the future of software delivery.
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
Connector Corner: Automate dynamic content and events by pushing a buttonDianaGray10
Here is something new! In our next Connector Corner webinar, we will demonstrate how you can use a single workflow to:
Create a campaign using Mailchimp with merge tags/fields
Send an interactive Slack channel message (using buttons)
Have the message received by managers and peers along with a test email for review
But there’s more:
In a second workflow supporting the same use case, you’ll see:
Your campaign sent to target colleagues for approval
If the “Approve” button is clicked, a Jira/Zendesk ticket is created for the marketing design team
But—if the “Reject” button is pushed, colleagues will be alerted via Slack message
Join us to learn more about this new, human-in-the-loop capability, brought to you by Integration Service connectors.
And...
Speakers:
Akshay Agnihotri, Product Manager
Charlie Greenberg, Host
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
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1. IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
e-ISSN: 2278-1676 Volume 4, Issue 5 (Jan. - Feb. 2013), PP 24-28
www.iosrjournals.org
www.iosrjournals.org 24 | Page
Microwave Power Transmission – A Next Generation Power
Transmission System
1
M.Venkateswara Reddy, 2
K.Sai Hemanth, 3
CH.Venkat Mohan
M.E,(Ph.D)1
Department of EEE, 2
B.Tech(EEE) student of , 3
B.Tech(EEE) student of Vikas College of Engg
and Tech,India.
Abstract: In this paper, we present the concept of transmitting power without using wires i.e., transmitting
power as microwaves from one place to another is in order to reduce the cost, transmission and distribution
losses. This concept is known as Microwave Power transmission (MPT). We also discussed the technological
developments in Wireless Power Transmission (WPT) which are required for the improment .The components
which are requiredfor the development of Microwave Power transmission(MPT)are also mentioned along with
the performance when they are connected to various devices at different frequency levels . The advantages,
disadvantages, biological impacts and applications of WPT are also presented.
Keywords:Microwave Power transmission (MPT), Nikola Tesla,Rectenna,Solar Power Satellites
(SPS),Wireless Power transmission (WPT).
I. Introduction
One of the major issue in power system is the losses occurs during the transmission and distribution of
electrical power. As the demand increases day by day, the power generation increases and the power loss is also
increased. The major amount of power loss occurs during transmission and distribution. The percentage of loss
of power during transmission and distribution is approximated as 26%. The main reason for power loss during
transmission anddistribution is the resistance of wires used for grid. The efficiency of power transmission can be
improved to certain level by using high strength composite over head conductors and underground cables that
use high temperature super conductor. But, the transmission is still inefficient. According to the World
Resources Institute (WRI), India‟s electricity grid has the highest transmission and distribution losses in the
world – a whopping 27%. Numbers published by various Indian government agencies put that number at 30%,
40% and greater than 40%. This is attributed to technical losses (grid‟s inefficiencies) and theft [1].
Any problem can be solved by state–of-the-art technology. The above discussed problem can be solved
by choose an alternative option for power transmission which could provide much higher efficiency, low
transmission cost and avoid power theft.Microwave Power Transmission is one of the promising technologies
and may be the righteous alternative for efficient power transmission.
Figure1.The 187-foot wardenclyffe tower
2. Microwave Power Transmission – A Next Generation Power Transmission System
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II. Wireless Power Transmission
Nikola Tesla he is who invented radio and shown us he is indeed the “Father of Wireless”. Nikola Tesla is
the one who first conceived the idea Wireless Power Transmission and demonstrated “the transmission of
electrical energy without wires" that depends upon electrical conductivity as early as 1891[2]. In 1893, Tesla
demonstrated the illumination of vacuum bulbs without using wires for power transmission at the World
Columbian Exposition in Chicago. The Wardenclyffe tower shown in Figure 1 was designed and constructed by
Tesla mainly for wireless transmission of electrical power rather than telegraphy [3].
In 1904, an airship ship motor of 0.1 horsepower is driven by transmitting power through space from a
distance of least 100 feet [4]. In 1961, Brown published the first paper proposing microwave energy for power
transmission, and in 1964 he demonstrated a microwave-powered model helicopter that received all the power
needed for flight from a microwave beam at 2.45 GHz [5] from the range of 2.4GHz – 2.5 GHz frequency band
which is reserved 101 for Industrial, Scientific, and Medical (ISM) applications. Experiments in power
transmission without wires in the range of tens of kilowatts have been performed at Goldstone in California in
1975 [6] and at Grand Bassin on Reunion Island in 1997 [7] . The world‟s first MPT experiment in the
ionosphere called the MINIX (Microwave Ionosphere Non-linear Interaction Experiment) rocket experiment is
demonstrated in 1983 at Japan [8]. Similarly, the world‟s first fuel free airplane powered by microwave energy
from ground was reported in 1987 at Canada. This system is called SHARP (Stationary High – Altitude Relay
Platform) [9]. In 2003, Dryden Flight Research Centre of NASA demonstrated a laser powered model airplane
indoors. Japan proposed wireless charging of electric motor vehicles by Microwave Power Transmission in
2004. Powercast, a new company introduced wireless power transfer technology using RF energy at the 2007
Consumer Electronics Show [10]. A physics research group, led byProf. Marin Soljacic, at the Massachusetts
Institute of technology (MIT) demonstrated wireless powering of a 60W light bulb with 40% efficiency at a 2m
(7ft) distance using two 60cm-diameter coils in 2007 [11]. Recently in 2008, Intel reproduced the MIT group's
experiment by wirelessly powering a light bulb with 75% efficiency at a shorter distance [12].
2.2 Wireless Power Transmission System William C. Brown, the pioneer in wireless power transmission
technology, has designed, developed a unit and demonstrated to show how power can be transferred through
free space by microwaves. The concept of Wireless Power Transmission System is explained with functional
block diagram shown in fig 2. In the transmission side, the microwave power source generates microwave
power and the output power is controlled by electronic control circuits. The wave guide ferrite circulator which
protects the microwave source from reflected power is connected with the microwave power source through the
Coax – Waveguide Adaptor.The tuner matches the impedance between the transmitting antenna and the
microwave source. The attenuated signals will be then separated based on the direction of signal propagation by
Directional Coupler. The transmitting antenna radiates the power uniformly through free space to the rectenna.
In the receiving side, a rectenna receives the transmitted power and converts the microwave power into DC
power. The impedance matching circuit and filter is provided to setting the output impedance of a signal source
equal to the rectifying circuit. The rectifying circuit consists of Schottky barrier diodes converts the received
microwave power into DC power
2.3 Components of WPT System
The Primary components of Wireless Power Transmission are Microwave Generator, Transmitting
antenna and Receiving antenna (Rectenna). The components are described in this chapter.
2.3.1 Microwave Generator
The microwave transmitting devices are classified as Microwave Vacuum Tubes (magnetron, klystron,
Travelling Wave Tube (TWT), and Microwave Power Module (MPM)) and Semiconductor Microwave
transmitters (GaAs MESFET, GaN pHEMT, SiC MESFET, AlGaN/GaN HFET, and InGaAS). Magnetron is
widely used for experimentation of WPT. The microwave transmission often uses 2.45GHz or 5.8GHz of ISM
band. The other choices of frequencies are 8.5 GHz [13], 10 GHz[14] and 35 GHz [15]. The highest efficiency
over 90% is achieved at 2.45 GHz among all the frequencies [15].
2.3.2 Transmitting antenna
The slotted wave guide antenna, microstrip patch antenna, and parabolic dish antenna are the most
popular type of transmitting antenna. The slotted waveguide antenna is ideal for power transmission because of
its high aperture efficiency (> 95%) and high power handling capability.
2.3.3 Rectenna
The concept, the name „rectenna‟ and the rectenna was conceived by W.C. Brown of Raytheon Company
in the early of 1960s [16]. The rectenna is a passive element consists of antenna, rectifying circuit with a low
3. Microwave Power Transmission – A Next Generation Power Transmission System
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pass filter between the antenna and rectifying diode. The antenna used in rectenna may be dipole, Yagi –
Uda,microstrip or parabolic dish antenna. The patch dipole antenna achieved the highest efficiency among the
all. The performance of various printed rectenna is shown in Table I. Schottky barrier diodes (GaAs-W, Si, and
GaAs) are usually used in the rectifying circuit due to the faster reverse recovery time and much lower forward
voltage drop and good RF characteristics. The rectenna efficiency for various diodes at different frequency is
shown in Table II.
2.4Types of WPT
2.4.1 Near-field techniques
Inductive Coupling
Resonant Inductive Coupling (RIC)
Air Ionization
Figure2. Block diagram of RIC
2.4.1. Far-field techniques
Microwave Power Transmission (MPT)
LASER power transmission
III. Advantages, Disadvantages, And Biological Impacts Of Wpt
3.1 Advantages Wireless Power Transmission system would completely eliminates the existing high-tension
power transmission line cables, towers and sub stations between the generating station and consumers and
facilitates the interconnection of electrical generation plants on a global scale. It has more freedom of choice of
both receiver and transmitters. Even mobile transmitters and receivers can be chosen for the WPT system. The
cost of transmission and distribution become less and the cost of electrical energy for the consumer alsowould
be reduced. The power could be transmitted to the places where the wired transmission is not possible. Loss of
transmission is negligible level in the Wireless Power Transmission; therefore,the efficiency of this method is
very much higher than the wired transmission. Power is available at the rectenna as long as the WPT is
operating. The power failure due to short circuit and fault on cables would never exist in the transmission and
power theft would be not possible at all.
3.2 Disadvantages
The Capital Cost for practical implementation of WPT seems to be very high and the other disadvantage of
the concept is interference of microwave with present communication systems. Health hazards may occur.
3.3 Biological Impacts
Common beliefs fear the effect of microwave radiation. But the studies in this domain repeatedly proves that
the microwave radiation level would be never higher than the dose received while opening the microwave oven
door, meaning it is slightly higher.
4. Microwave Power Transmission – A Next Generation Power Transmission System
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Table1. Performance of Printed Rectenna
Table 2. Rectenna Efficiency for Various Diodes at Different Frequency
IV. Applications Of Wpt
Generating power by placing satellites with giant solar arrays in Geosynchronous Earth Orbit and
transmitting the power as microwaves to the earth known as Solar Power Satellites (SPS) is the largest
application of WPT. Another application of WPT is moving targets such as fuel free airplanes, fuel free electric
vehicles, moving robots and fuel free rockets. The other applications of WPT are Ubiquitous PowerSource (or)
WirelessPower
Source, Wireless sensors and RF Power Adaptive Rectifying Circuits (PARC).
4.1Near-field energy transfer:
1. Electric and Consumer electronics
2. Industrial purposes
4.2In Far-field energy transfer:
1. Solar Power Satellites
Type of
Rectenna
Operating
Frequency
(GHz)
Measured
Peak
Conversion
Efficiency
(%)
Printed diplomo[9] 2.45 85
Circular Patch[19] 2.45 81
Printed dual
rhombic [22]
5.6 78
Square patch [15] 8.51 66
Frequency
(GHz)
Schottky
Diode
Measured
Efficiency
(%)
Calculated
Efficiency
(%)
2.45[13] GaAs-W 92.5 90.5
5.8[19] Si 82 78.3
8.51[20] GaAs 62.5 66.2
5. Microwave Power Transmission – A Next Generation Power Transmission System
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2. Energy to remote areas
3. Can broadcast energy globally (in future)
V. Conclusion
The concept of Microwave Power transmission (MPT) and Wireless Power Transmission system is
presented. Thetechnological developments in Wireless Power Transmission(WPT), the advantages,
disadvantages, biological impacts and applications of WPT are also discussed.This concept offers greater
possibilities for transmitting power with negligible losses and ease of transmission than any invention or
discovery heretofore made. Dr. Neville of NASA states “You don‟t need cables, pipes, or copper wires to
receive power. We can send it to you like a cell phone call – where you want it, when you want it, in real time”.
We can expect with certitude that in next few years‟ wonders will be wrought by its applications if all the
conditions are favourable.
References
[1] http://cleantechindia.wordpress.com/2008/07/16/indiaselectricity- transmission-and-distribution-losses/
[2] Nikola Tesla, My Inventions, Ben Johnston, Ed., Austin, Hart Brothers, p. 91,1982.
[3] Nikola Tesla, “The Transmission of Electrical Energy Without Wires as a Means for Furthering Peace,” Electrical World and
Engineer. Jan. 7, p. 21, 1905.
[4] The Electrician (London), 1904).
[5] W.C. Brown, J.R. Mims and N.I. Heenan, “An Experimental Microwave-Powered Helicopter”, 965 IEEE International Convention
Record, Vol. 13, Part 5, pp.225-235.
[6] Brown., W. C. (September 1984). "The History of Power Transmission by Radio Waves". Microwave Theory and Techniques,
IEEE Transactions on (Volume: 32, Issue: 9 On page(s): 1230- 1242 + ISSN: 0018-9480).
http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=1132833.
[7] POINT-TO-POINT WIRELESS POWER TRANSPORTATION IN REUNION ISLAND 48th International Astronautical
Congress, Turin, Italy, 6-10 October 1997 - IAF-97- R.4.08 J. D. Lan Sun Luk, A. Celeste, P. Romanacce, L. Chane Kuang Sang, J.
C. Gatina - University of La Réunion - Faculty of Science and Technology.
[8] Matsumoto, H.N. Kaya, I. Kimura, S. Miyatake, M. Nagatomo, and T. Obayashi, MINIX Project toward the Solar Power Satellites -
-- Rocket experiment of microwave energy transmission and associated plasma physics in the ionosphere, ISAS space energy
symposium, pp 69-76, 1986.
[9] J.J. Schelesak, A. Alden and T. Ohno, A microwave powered high altitude platform, IEEE MTT-S Int. Symp. Digest, pp - 283- 286,
1988.
[10] "CES Best of 2007"
[11] "Goodbye wires…MIT News. 2007-06-07. http://web.mit.edu/newsoffice/2007/wireless-0607.html.
[12] www.tgdaily.com
[13] L.W. Epp, A.R. Khan, H.K. Smith, and R.P. Smith, “A compact dual-polarized 8.51 GHz rectenna for high-voltage (50 V) actuator
applications,” IEEE Trans. Microwave Theory Tech., vol. 48, pp. 111-120, 2000.
[14] T-WYoo and K. Chang, “Theoretical and experimental development of 10 and 35 GHz rectennas,” IEEE Trans. Microwave Theory
Tech., vol. 40, pp. 1259-1266, 1992.
[15] P. Koert and J.T. Cha, “35 GHz rectenna development,” in Proc. 1st Annu. Wireless Power Transmission Conf., San Antonio,TX,
1993, pp. 457-466.
[16] Brown, W.C, “The History of the Development of the Rectenna” Proc. Of SPS microwave systems workshop, pp.271- 280, Jan
1980.
[17] www.howstuffworks.com (How Micro Ovens Work – A Cooking Oven for the 21st century. By Gabriel Gache)
[18] J.C. Lin, “Biological aspects of mobile communication fields,” Wireless Networks, vol. 3, pp. 439-453, 1997.
[19] M. Onda,M. Fujita, Y. Fujino, N. Kaya, K. Tomita, andMYamada, “A stratospheric stationary LTAplatform concept and ground-to-
vehiclemicrowave power transmission tests,” in 37th AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, 1999, pp. 1-7.
[20] P. Koert and J.T. Cha, “35 GHz rectenna development,” in Proc.1st Annu. Wireless Power Transmission Conf., San Antonio, TX,
1993, pp. 457-466.
[21] T.-W. Yoo, “Experimental and theoretical study on 35 GHz RF-to-DC power conversion receiver for millimeter-wave beamed
power transmission,” Ph.D. dissertation, Dept. of Electrical Engineering, Texas A&M Univ., Dec. 1993.