__EE3591__

__POWER ELECTRONICS__

**COURSE OBJECTIVES:**

•
To understand the various applications of power electronic devices for
conversion, control and conditioning of the electrical power and to get an
overview of different types of power semiconductor devices and their dynamic
characteristics.

•
To understand the operation, characteristics and performance parameters of controlled
rectifiers.

•
To study the operation, switching techniques and basic topologies of DC-DC
switching regulators.

•
To learn the different modulation techniques of pulse width modulated inverters
and to understand harmonic reduction methods.

•
To study the operation of AC voltage controller and various configurations of
AC voltage controller.

**UNIT I**

**SWITCHING POWER SUPPLIES**

MOSFET
dynamic behavior - driver and snubber circuits - low power high switching
frequency per circuit switching Power supplies, buck, boost, buck-boost
converters - Isolated topologies - resonant converters - switching loss
calculations and thermal design.

**UNIT II**

**INVERTERS**

IGBT:
Static and dynamic behavior - single phase half bridge and full bridge
inverters - VSI (1phase and three phase inverters square wave operation) -
Voltage control of inverters single, multi pulse, sinusoidal, space vector
modulation techniques- various harmonic elimination techniques-CSI

**UNIT III**

**UNCONTROLLED RECTIFIERS**

Power
Diode - half wave rectifier - mid-point secondary transformer based full wave
rectifier - bridge rectifier - voltage doubler circuit - distortion factor -
capacitor filter for low power rectifiers - LC filters - Concern for power
quality - three phase diode bridge.

**UNIT IV **

**CONTROLLED RECTIFIERS**

SCR-Two
transistor analogy based turn- ON turn ON losses thermal protection -
controlled converters (1 pulse, 2 pulse, 3 pulse, 6 pulse) - displacement
factor - ripple and harmonic factor - power factor mitigation, performance
parameters - effect of source inductance - inverter angle limit.

**UNIT V**

**AC PHASE CONTROLLERS**

TRIAC
triggering concept with positive and negative gate pulse triggering, TRIAC
based phase controllers - various configurations for SCR based single and three
phase controllers.

**COURSE OUTCOMES:**

Upon
the successful completion of the course, students will be able to:

**CO1:**
Understand the operation of semiconductor devices and dynamic characteristics
and to design &analyze the low power SMPS

**CO2:**
Analyze the various uncontrolled rectifiers and design suitable filter circuits

**CO3:**
Analyze the operation of the n-pulse converters and evaluate the performance parameters

**CO4:**
Understand various PWM techniques and apply voltage control and harmonic
elimination methods to inverter circuits.

**CO5:**
Understand the operation of AC voltage controllers and its applications.

**TOTAL:
45 PERIODS**

**TEXT BOOKS:**

1.
Ned Mohan, T.M.Undeland, W.P.Robbins, "Power Electronics: Converters,
applications and design", John Wiley and Sons, 3rd Edition (reprint), 2009

2.
Rashid M.H., Power Electronics Circuits, Devices and Applications, Prentice
Hall India, 3rd Edition, New Delhi, 2004.

**REFERENCES:**

1.
Cyril. W. Lander, Power Electronics, McGraw Hill International, Third Edition,
1993.

2.
P.S.Bimbhra, Power Electronics, Khanna Publishers, Third Edition 2003

3.
Philip T.Krein, Elements of Power Electronics, Oxford University Press, 2013.

4.
P.C.Sen, Power Electronics, Tata McGraw-Hill, 30th reprint, 2008.