8/27/20151 power electronics course outline det 309

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POWER ELECTRONICS

COURSE OUTLINE

DET 309

04/19/23 2

LECTURERSo Mr. Mohammad Faridun Naim bin

Tajuddin

e-mail: [email protected]

Room: 1. KKF 2,Seberang Ramai, Kuala Perlis. 2. KKF 10A, Tmn Kuala Perlis, Kuala Perlis.

TEACHING ENGINEERo Mr. Mohammad Faridun Naim bin

Tajuddin

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Course Synopsis

• This course will introduce the students to the power electronics converters. Firstly, students will be introduced to the power electronics concept and power semiconductor devices. Then types of converters and their circuit implementation such as AC-DC, AC-AC and DC-DC will be introduced to the students. Furthermore, students also will be exposed to the circuit and waveforms analysis for each converters. Lastly students will be introduced to the application of power electronics converters as motor drives.

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Course Contents

Week 1 & 2

Chapter 1: Power Electronics Concept• DESCRIBE the power electronics concept as power conversion.• DESCRIBE the application of power electronics.• DESCRIBE and CALCULATE peak value, rms value and average value.

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Course Contents

Week 3 & 4

Chapter 2: Power Semiconductor Devices

• DESCRIBE the operation and characteristics of Power Diodes or Rectifiers.• DESCRIBE the operation and characteristics of Thyristor such as SCR, Diac and Triac.• DESCRIBE the operation and characteristics of Power Mosfet• DISCUSS the controller circuit requirement for Thyristors and Mosfet and circuit implementation.

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Course Contents

Week 5, 6, 7 & 8

Chapter 3: AC-DC Converters

• DESCRIBE the operation of Half-wave rectifier and Full-wave rectifier by using Power Diodes.• DESCRIBE the operation of Controlled Half-wave rectifier and Full-wave rectifier by using Thyristors.• CALCULATE and SOLVE problems related to the operation of Half-wave rectifier and Full-wave rectifier for both controlled and uncontrolled circuit.• ANALYZE the waveforms of Half-wave rectifier and Full-wave rectifier for both controlled and uncontrolled circuit• ANALYZE the effect of R Load, R-L Load and implementation of Free-wheeling diodes

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Course Contents

Week 8 & 9

Chapter 4: AC-AC Converters

• DESCRIBE and COMPARE method of controlling AC Voltages such as Phase Angle Control, Integral Cycle Control etc and also circuit implementation.• DESCRIBE and COMPARE the operation of AC Voltage Controller by using SCR, Diac and Triac .• CALCULATE and SOLVE problems related to the operation of AC Voltage Controller.'• ANALYZE the waveforms of AC Voltage Controller for R Load and R-L Load.• DISCUSS and ANALYZE the effect of snubber circuit.

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Course Contents

Week 10, 11 & 12

Chapter 5: DC-DC Converter• DESCRIBE the principles of DC-DC Converters by using switch mode.• DESCRIBE types of DC-DC Converters such as Buck, Boost and Buck-Boost, their operation and circuit implementation.• CALCULATE and SOLVE problems related to the operation of DC-DC Converters.• DESCRIBE the effect of the inductor value to the Continous Conduction Mode (CCM) and Discontinues Conduction Mode (DCM)• ANALYZE the waveforms of Buck, Boost and Buck-Boost Converters and COMPARE between CCM and DCM .

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Course Contents

Week 13 & 14

Chapter 6: Power Electronics Converters as Motor Drives

• DESCRIBE the operation and characteristics of AC Motor and DC Motor.• DESCRIBE and COMPARE methods of controlling speed of AC Motor and DC Motor by using power semiconductor devices.• CALCULATE and SOLVE problems related to the controlling speed of AC Motor and DC Motor

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Course Contents

Week 15 & 16

STUDY WEEK (REVISION)

Week 17

FINAL EXAM

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Course Contents

Laboratory

o 4 lab experiments – 3rd week o 1 Lab Testo 1 Mini Project a) Software & Hardware

b) Report & Presentation

Tests & Quizzes

o 2 Tests on 8th & 14th weeko Quiz - anytime

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Course Evaluation

Final Examination – 50%

Course works – 50%o Tests & Quizzes 10 % o Lab experiments 10 % o Lab Test 5 % o 1 Mini Project a) Software 5 % b) Hardware 10 %

c) Report & Presentation 10 %

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List of Textbooks & References

Textbooks1.Mohan, Undeland, Robbins. (2002). Power Electronics: Converters, Application. 3rd ed. John Wiley & Sons.2. Hart. Daniel W. (1997). Introduction to Power Electronics. Prentice Hall.

References1.Muhammad H. Rashid. (2004). Power Electronics: Circuit Devices & Application. 3rd ed. Pearson-Prentice Hall.2. Theodore Wildi. (2006). Electrical Machines, Drives & Power Systems. 6th ed. Prentice Hall.3. Krein. Philip T. (1998). Elements of Power Electronics. Oxford University Press.

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POWER ELECTRONICS

1. POWER ELECTRONICS CONCEPT

DET 309

Prepared by: Mohd Faridun Naim b. Tajuddin

15

definition OF POWER ELECTRONICs

o The task of power electronics is to process and control the flow of electric energy by supplying voltages and currents in a form that is optimally suited for user loads.

Power Processor

Input Power

ss iv ,Source

Controller

Load

Measurement

Reference

Output Power

oo iv ,

Figure 1.1: Block diagram of a power electronic system.


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definition OF POWER ELECTRONICS…cont.

o PE is an interdisciplinary field:

Figure 1.2: Control, energy, and power electronics are related.

POWER ELECTRONICS

SYST

EM &

CO

NTR

OL

Switc

h co

ntro

l,

Feed

back

con

trol

,

Syst

em

PO

WE

R &

EN

ER

GY

Energy Processing,

Power supplies,

Motors and drives

Circuits, Magnetic, Power

semiconductors

ELECTRONICS & DEVICES


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Power Electronics Systemso To convert electrical energy from one form to

another, i.e. from the source to load with: Highest efficiency, Highest availability Highest reliability Lowest cost, Smallest size Least weight.


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Power Electronics Applications

Static Applicationso Involves non-rotating or moving mechanical components

Examples1.Switch-mode (dc) power supplies and uninterruptible power supplies. Advances in microelectronics fabrication technology have led to the development of computers, communication equipment, and consumer electronics, all of which require regulated dc power supplies and often uninterruptible power supplies.2.Electro-technical applications. These include equipment for welding, electroplating, and induction heating.3.Utility-related applications. One such application is in transmission of power over high-voltage dc (HVDC) lines. At the sending end of the transmission line, line-frequency voltages and currents are converted into dc. This dc is converted back into the line-frequency ac at the receiving end of the line. Power electronics is also beginning to play a significant role as electric utilities attempt to utilize the existing transmission network to a higher capacity. Potentially, a large application is in the interconnection of photovoltaic and wind-electric systems to the utility grid.


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Power Electronics Applications

Drive Applicationso Intimately contains moving or rotating components such as motors.

Examples1. Electric trains2. Electric vehicles3. Air-conditioning System4. Pumps, Compressor5. Conveyer Belt (Factory automation).


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Application Examples

Static Application

DC Power Supply

AC DC

Diode Rectifier

Filter

AC Line voltage

3or 1

DC DC

DC-DC Converter

LOAD

Figure 1.3: DC Power Supply System


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Application ExamplesDrive Application

Motor Driven Pump

Conventional Drive Adjustable Speed Drive

o In a conventional pump system, the pump operates at essentially a constant speed, and the pump flow rate is controlled by adjusting the position of the throttling valve. o This procedure results in significant power loss across the valve at reduced flow rates where the power drawn from the utility remains essentially the same as at the full flow rate. o This power loss is eliminated in the system of Adjustable Speed Drive, where an adjustable-speed motor drive adjusts the pump speed to a level appropriate to deliver the desired flow rate.


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Power ProcessorFor a systematic study of power electronics, it is useful to categorize the power processors, shown in the block diagram of Fig. 1.1, in terms of their input and output form or frequency. In most power electronic systems, the input is from the electric utility source. Depending on the application, the output to the load may have any of the following forms:1. DC

(a) regulated (constant) magnitude(b) adjustable magnitude

2. AC(a) constant frequency, adjustable magnitude(b)adjustable frequency and adjustable magnitude

o The utility and the AC load, independent of each other, may be single phase or three phase. o The power flow is generally from the utility input to the output load. o There are exceptions, however. For example, in a photovoltaic system interfaced with the utility grid, the power flow is from the photovoltaics (a DC input source) to the AC utility (as the output load). o In some systems the direction of power flow is reversible, depending on the operating conditions.Prepared by: Mohd Faridun Naim b. Tajuddin

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Power Converterso The power processors of Fig. 1.1 usually consist of more than one power conversion stage (as shown in Fig. 1.3) where the operation of these stages is decoupled on an instantaneous basis by means of energy storage elements such as capacitors and inductors. o Therefore, the instantaneous power input does not have to equal the instantaneous power output. We will refer to each power conversion stage as a converter.o Thus, a converter is a basic module (building block) of power electronic systems.o It utilizes power semiconductor devices controlled by signal electronics (integrated circuits) and possibly energy storage elements such as inductors and capacitors.

Converter 1 Converter 2

Energy Storage Elements

Input Output

Figure 1.4: Power Processor Block DiagramPrepared by: Mohd Faridun Naim b. Tajuddin

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Power Converters…cont.Converters can be divided into the following broad categories:

Filter

AC-DC Rectifier

AC DC

RectifierAC Input

DC output

DC DC

DC-DC Converter DC output

DC input

DC-DC Chopper

LOAD

ACDC

InverterDC Input

AC output

DC-AC Inverter


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Current issues1. Energy scenarioo Need to reduce dependence on fossil fuel

– coal, natural gas, oil, and nuclear power resourceDepletion of these sources is expected.

o Tap renewable energy resources:– solar, wind, fuel-cell, ocean-wave

o Energy saving by PE applications. Examples:– Variable speed compressor air-conditioning system:30% savings compared to thermostat-controlledsystem.– Lighting using electronics ballast boost efficiency offluorescent lamp by 20%.


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Current issues…cont.2. Environment issueso Nuclear safety.

– Nuclear plants remain radioactive for thousands ofyears.

o Burning of fossil fuel– emits gases such as CO2, CO (oil burning), SO2, NOX

(coal burning) etc.– Creates global warming (green house effect), acid rainand urban pollution from smokes.

o Possible Solutions by application of PE. Examples:– Renewable energy resources.– Centralization of power stations to remote non-urbanarea. (mitigation).– Electric vehicles.


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Power Electronics growth

PE rapid growth due to:o Advances in power (semiconductor) switcheso Advances in microelectronics (DSP, VLSI,o Microprocessor/microcontrollero New ideas in control algorithmso Demand for new applications


8/27/20151 power electronics course outline det 309

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