A VFD can be used to control both the speed and torque of a standard induction AC electric motor.
It varies both the frequency and voltage of the AC waveform being delivered to the motor saving money in electricity.
A variable-frequency drive (VFD) or adjustable-frequency drive (AFD), variable-voltage/variable-frequency (VVVF) drive, variable speed drive (VSD), AC drive, micro drive or inverter drive is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.
A VFD can be used to control both the speed and torque of a standard induction AC electric motor.
It varies both the frequency and voltage of the AC waveform being delivered to the motor saving money in electricity.
A variable-frequency drive (VFD) or adjustable-frequency drive (AFD), variable-voltage/variable-frequency (VVVF) drive, variable speed drive (VSD), AC drive, micro drive or inverter drive is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.
A Variable Frequency Drive (VFD) is a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to the electric motor. Other names for a VFD are variable speed drive, adjustable speed drive, adjustable frequency drive, or an AC drive.
Variable frequency drive working and operationSai Kumar
this presentation describes about the working of the variable frequency drives and its applications explained in detail. go through and have a clear idea of variable frequency drive....hope you will like it. thank you
Energy Savings with Variable Frequency DrivesAzizah Kassim
To understand what is VFD / VSD / ASD / Inverter and what does it do.
To understand what is System Curve, Pump & Fan Curve and also Affinity Law
To understand how VFD saves AC motor ‘s energy
To estimate energy savings by using VFD to control speed of motor driving pumps / fans
To demonstrate few VFD’s applications in building and how it can save the energy
Energy efficient motors use less electricity, run cooler, and often last longer than NEMA (National Electrical Manufacturers Association) B motors of the same size.This presentation is on ' ENERGY EFFICIENT INDUCTION MOTOR ' which is mostly use in industries.
three level diode clamp inverter. that converts any type of DC ( rectified, PV cell, battery etc.) to AC supply. we made by mosfet and ardiuno . in this ppt we present the Simulink model of a three-level inverter and the hardware presentation of the inverter.
A Variable Frequency Drive (VFD) is a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to the electric motor. Other names for a VFD are variable speed drive, adjustable speed drive, adjustable frequency drive, or an AC drive.
Variable frequency drive working and operationSai Kumar
this presentation describes about the working of the variable frequency drives and its applications explained in detail. go through and have a clear idea of variable frequency drive....hope you will like it. thank you
Energy Savings with Variable Frequency DrivesAzizah Kassim
To understand what is VFD / VSD / ASD / Inverter and what does it do.
To understand what is System Curve, Pump & Fan Curve and also Affinity Law
To understand how VFD saves AC motor ‘s energy
To estimate energy savings by using VFD to control speed of motor driving pumps / fans
To demonstrate few VFD’s applications in building and how it can save the energy
Energy efficient motors use less electricity, run cooler, and often last longer than NEMA (National Electrical Manufacturers Association) B motors of the same size.This presentation is on ' ENERGY EFFICIENT INDUCTION MOTOR ' which is mostly use in industries.
three level diode clamp inverter. that converts any type of DC ( rectified, PV cell, battery etc.) to AC supply. we made by mosfet and ardiuno . in this ppt we present the Simulink model of a three-level inverter and the hardware presentation of the inverter.
ENERGY MODELING OF THE PYROPROCESSING OF CLINKER IN A ROTARY CEMENT KILNISA Interchange
This paper highlights the efforts taken by the author in developing an Energy Model for the pyro-processing of Clinker production in a dry-process rotary cement kiln. In this paper this Energy Model is applied to a state of the art cement plant in a Far East Asian country. However this Energy Model is also applicable to all the modern dry process cement kilns. This model is based on actual field input data and site observations.
Speed Control of Induction Motor using Variable Frequency DriveSandeep Kaushal
Induction motor is constant speed motor at a particular frequency and consumes almost same power irrespective of load demand. Let's talk about two different load one is high load and other low load. AT low load motor is delivering the load with some current and thereby torque is maintained. If load goes high, to maintain the same speed and developed torqued, motor will draw extra current and will corresponds to more losses. If speed of motor is reduced corresponding too low load and is increased corresponding to high load, then substantial amount of power can be saved. And speed can be changed by changing the frequency of input supply.
Manufacture of Value Added Products from Rice Husk (Hull) and Rice Husk Ash (...Ajjay Kumar Gupta
Manufacture of Value Added Products from Rice Husk (Hull) and Rice Husk Ash (RHA): (Precipitated Silica, Activated Carbon, Cement, Electricity, Ethanol, Hardboard, Oxalic Acid, Paper, Particle Board, Rice Husk Briquettes, Rice Husk Pellet, Silicon, Sodium Silicate Projects)
Rice hulls (or rice husks) are the hard protecting coverings of grains of rice. In addition to protecting rice during the growing season, rice hulls can be put to use as building material, fertilizer, insulation material, or fuel. Rice hulls are the coatings of seeds, or grains, of rice. The husk protects the seed during the growing season, since it is formed from hard materials, including opaline silica and lignin. The hull is mostly indigestible to humans.
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Energy Audit & Energy Conservation Opportunities in Electrical Equipments ...Manohar Tatwawadi
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Learn how a new energy efficiency product gets made, from opportunity to concept, design, validation and production, with this free presentation from the 73rd Indonesia National Electricity Day & POWER-GEN Asia. #PGASIA
These slides presents an overview of different wind generator systems and their comparisons. Later of the slides the modelling and control strategies of wind generators will be discussed.
Ceiling fan is mostly driven by the single induction motor with an efficiency of 30%.
The BLDC motor is popular now a days for a high efficiency, compactness and controllability.
Bangladesh Power Stations & Power Plants OverviewRidwanul Hoque
It is a presentation about Bangladesh power stations and power plants such as: Energypac Engineering Ltd, DESCO,Dockyard & Engineering Works LTD ,RPCL, APSCL.
* We have a technology called the VIRTUAL PIPELINE TECHNOLOGY (VPT) - captures flared gas, stranded gas, associate gas (dry or wet - explained in the slide) at any given pressure, processes it, transport and supply the gas at the preferred discharge pressure. Our tubes carries a minimum of 550mscf (could carry more if the road is good and can take the weight). It can also pick up gas from existing pipelines and deliver gas to pipeline disconnected areas.
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INSIGHT: building a gigantic MW plants that will take 4 - 5 years to achieve also not considering where the source of feedstock is has been a major problem in West Africa.
Meanwhile, TEI can build modular plants (1.5MW each) 6MW plants + VPT within 6 - 9 months and could have 100 different locations (600MW) over a period of time serving numerous locations, and make the return on your investments within a year or 16 - 18 months as the case may be (depending on the distance from feedstock and discharge pressure) yet achieving the same purpose (or even more) in a significant less amount of time as any stand alone 500MW which will just be concluded in the 4th or 5th year talk less of when the breakeven point will be.
Also, if one station goes out, it does not affect the other 99 plants/stations hence providing light/electricity to a wider range. Another better advantage of our VPT and modular plants and why we are better than any product on earth as of today. So robust, you can deploy in the rural areas.
* Modular Gas Storage - For contingent supplies, we can build modular storage facility (such as a farm tanks) with storage capacity of 7.5mmscf/d and could increase in the same module. It is very scalable in that, other than the fact that we can move it from a location to another, we could also convert the modules to a gas transportation/supply cylinders attached to trucks.
* Modular Gas Separator - used to extract by-products of natural gas in small quantities. Methane to power turbines, Propane for cooking, Butane, LNG, etc. are other by-products we can help monitize...
These are reasons why we are a SOLUTION to the Gas, Power and Energy sectors and looking forward to providing a solution to the existing problems.....
LA HUG - Video Testimonials with Chynna Morgan - June 2024Lital Barkan
Have you ever heard that user-generated content or video testimonials can take your brand to the next level? We will explore how you can effectively use video testimonials to leverage and boost your sales, content strategy, and increase your CRM data.🤯
We will dig deeper into:
1. How to capture video testimonials that convert from your audience 🎥
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3. How you can capture more CRM data to understand your audience better through video testimonials. 📊
B2B payments are rapidly changing. Find out the 5 key questions you need to be asking yourself to be sure you are mastering B2B payments today. Learn more at www.BlueSnap.com.
Enterprise Excellence is Inclusive Excellence.pdfKaiNexus
Enterprise excellence and inclusive excellence are closely linked, and real-world challenges have shown that both are essential to the success of any organization. To achieve enterprise excellence, organizations must focus on improving their operations and processes while creating an inclusive environment that engages everyone. In this interactive session, the facilitator will highlight commonly established business practices and how they limit our ability to engage everyone every day. More importantly, though, participants will likely gain increased awareness of what we can do differently to maximize enterprise excellence through deliberate inclusion.
What is Enterprise Excellence?
Enterprise Excellence is a holistic approach that's aimed at achieving world-class performance across all aspects of the organization.
What might I learn?
A way to engage all in creating Inclusive Excellence. Lessons from the US military and their parallels to the story of Harry Potter. How belt systems and CI teams can destroy inclusive practices. How leadership language invites people to the party. There are three things leaders can do to engage everyone every day: maximizing psychological safety to create environments where folks learn, contribute, and challenge the status quo.
Who might benefit? Anyone and everyone leading folks from the shop floor to top floor.
Dr. William Harvey is a seasoned Operations Leader with extensive experience in chemical processing, manufacturing, and operations management. At Michelman, he currently oversees multiple sites, leading teams in strategic planning and coaching/practicing continuous improvement. William is set to start his eighth year of teaching at the University of Cincinnati where he teaches marketing, finance, and management. William holds various certifications in change management, quality, leadership, operational excellence, team building, and DiSC, among others.
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In this masterclass, presented at the Global HR Summit on 5th June 2024, Luan Wise explored the essential features of social media platforms that support talent acquisition, including LinkedIn, Facebook, Instagram, X (formerly Twitter) and TikTok.
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Sustainability has become an increasingly critical topic as the world recognizes the need to protect our planet and its resources for future generations. Sustainability means meeting our current needs without compromising the ability of future generations to meet theirs. It involves long-term planning and consideration of the consequences of our actions. The goal is to create strategies that ensure the long-term viability of People, Planet, and Profit.
Leading companies such as Nike, Toyota, and Siemens are prioritizing sustainable innovation in their business models, setting an example for others to follow. In this Sustainability training presentation, you will learn key concepts, principles, and practices of sustainability applicable across industries. This training aims to create awareness and educate employees, senior executives, consultants, and other key stakeholders, including investors, policymakers, and supply chain partners, on the importance and implementation of sustainability.
LEARNING OBJECTIVES
1. Develop a comprehensive understanding of the fundamental principles and concepts that form the foundation of sustainability within corporate environments.
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3. Identify and define best practices and critical success factors essential for achieving sustainability goals within organizations.
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Digital Transformation and IT Strategy Toolkit and TemplatesAurelien Domont, MBA
This Digital Transformation and IT Strategy Toolkit was created by ex-McKinsey, Deloitte and BCG Management Consultants, after more than 5,000 hours of work. It is considered the world's best & most comprehensive Digital Transformation and IT Strategy Toolkit. It includes all the Frameworks, Best Practices & Templates required to successfully undertake the Digital Transformation of your organization and define a robust IT Strategy.
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2. Contents
• Importance and purpose
• Cement processing equipments
• Functional working of an electric drive system
• Applications
• Slip power recovery
• AC drives control method
• Motor control through VFD
• Reasons of using drives and case example
3. 1. Energy Conservation and its Management has become a prime
factor for the nation, society and individual due to high cost and
non availability of energy.
Why Important?
2. Non awareness of latest technologies and methods, non-
conventional energy sources and renewable energy sources and
how to run the plant and equipment in an energy efficient manner.
4. Our Concern
1. Electrical motors when not selected properly can cause energy
losses as high as 25% to 30%.
2. The motors designed in lower frame might not be properly selected
and have lower margins when operated at abnormal operating
conditions run with very low power factor and efficiency and result
in to high losses and consumption
5. The Purpose
1. Energy savings on most pump and fan applications.
2. Better process control and regulation.
3. Speeding up or slowing down a machine or process.
4. Inherent power-factor correction
5. Emergency bypass capability
6. Protection from overload currents
7. Safe Acceleration
6. Introduction to cement industry
1. Cement production is an energy intensive process
2. The industry has been accused of wasting energy
3. Demand for technologies driving higher energy efficiency in the
cement industry.
4. The deterioration of the basic process equipment – rotating kilns,
raw and cement mills has reached a critical level of 85 – 90 %
5. The power-intensive wet process of cement manufacturing prevails
6. High power consumption, defined not only by the process of
manufacturing but also technically obsolete equipment
7. Cement Processing Equipment
• Crushers
– Powers of the drives typically vary from 500 kW to 3000 kW.
– a very high start-up torque.
– The drive is typically supported by a flywheel in the drive train.
• Separators
−2.8 – 3.8 kWh electric energy per tonne of raw material can be saved.
– Motors are often used in braking mode to guarantee fast and accurate
speed control and also during stopping of the rotating separator.
7
8. • Conveyors
– a cost-efficient alternative for transportation
– not only for transportation of limestone but they are
also needed for transportation of stones, raw meals.
8
9. • Mills
1. Tube Mill (or Ball Mill)
– Over 95% of the energy input to the machines ends
up as heat. Only 1 to 2 % of the input power is used
to create new material surface.
9
10. • Fans
– used practically in all stages of the producing
cement and consume 30% of all electric energy
– Typical motor powers vary between 20kW and
2000kW.
– Fans can be propelled by a constant speed motor
with damper or vane or by a variable speed drive
10
11. Electric power consumption in a
cement plant
Quarrying & preblending 6 kWh/tonne 5 %
Raw milling 28 kWh/tonne 24 %
Blending 7 kWh/tonne 6 %
Burning & cooling 25 kWh/tonne 22 %
Finish milling 44 kWh/tonne 38 %
Conveying,
packing & loading
6 kWh/tonne 5 %
total 116 kWh/tonne
11
14. Induced Draft Fan for Cement Kiln
• The induced draft fan induces kiln air flow, which must be
continuously controlled to match the process requirements. Because
cement making is a thermal and a chemical process, both air volume
and mass flow must be controlled.
• Advantage of using VFD for induced draft fan of Cement Kiln:
• Maintenance of uniform working temperature, reduced fan noise
and saving of valuable floor space in the plant.
• The ID fan power can be several thousand hp and using a drive to
control air flow can result in considerable energy savings
• VFD optimises the fan RPM in such a manner that it precisely
matches the system operating conditions.
15. The input power decreases significantly as the speed is decreased to
reduce flow rate.
The power of a fan is proportional to the cube of the mechanical
angular frequency
Pfan ≈k Ω3
16. • To reduce the flow rate, the vane is partially
closed .
• Speed can be controlled by varying the
frequency, which controls the synchronous
speed
• Therefore, in comparison with a vane to control
the flow rate, a variable-speed fan can result in
significant energy saving in cases where
reduced flow rates are required for long periods
of time.
16
18. Cement Kiln Speed and Torque Control
Requirement of kiln drive are for
1.Motor current limit protection during starting stage.
2.High starting torque. A special design requirement is the
starting torque.It is typically 250 percent of full load torque
for the first three to five seconds before dropping to around
200 percent and gradually reducing further during the next 15
to 20 seconds at the end of which period the full speed is
attained.
20. Mills
# In cement production, mills are process critical. Reliable and precise
control has a high impact on production throughput and operating
costs. Controlling them with VSD’s results in
#Energy savings: Grinding mills can consume more than 60 percent of
the plant’s total electrical energy. Controlling them with VFD’s result in
significant energy savings .
21. AC drives control methods
Scalar Control Method
• The main task of scalar control is to form a phase voltage
based on preset values of amplitude and frequency
• Scalar control methods of an AC-motor can be generally
realized with voltage-fed inverters, current-fed inverters
and slip power recovery control.
• Usual speed control methods are U/ f = constant and U/f
2 = constant.
• The U/f 2 = constant method is often used in centrifugal
pump and fan drives.
21
22. Generalised motor control through VFD
• Power circuit consists of a phase-controlled rectifier with
• a single- or three-phase AC supply,LC filter, and inverter
• The frequency WC is the speed command variable
• Rectifier voltage command is generated directly from the
• frequency signal through a U/f = constant gain constant
24. In pumps and fans using constant speed motor with conventional control, variation in flow is
achieved by means of throttling valve or damper. The Power consumed=P Q H/ (m xp)
Where Q = Delivery of pump in m3/sec
H = pressure head (m)
m = motor efficiency
p = pump efficiency
Variable Speed Drives
Q-H characteristics of pump
0
100
200
300
400
500
600
0 1 2 3 4 5 6
Discharge(Q) in m3/sec
Pressure(H)inmmofwater
H
Hr1
Hr2
25. Q-H Curve with variable speed motor
0
100
200
300
400
500
600
0 1 2 3 4 5 6
Discharge(Q) in m3/sec
Pressure(H)inmmofwater
H1
H2
Hr
26. Reasons for variable AC DRIVES in
cement industry
1. Soft starting and reversing of motor
2. Accurate speed Regulation
3. Dynamic torque Regulation
4. High power factor
5. Regenerative braking
6. Flying start
7. Considerable maintenance savings and
increased productivity.
26