Power Electronics Full Premium Lecture Notes

Hand Written Materials from Reputed Institutions and Faculties - Power Electronics Full Premium Lecture Notes. Useful for Electrical Engineers , Specially for Candidates Appearing for GATE Exams.

• Power semiconductor devices
• 1. Power Diode
• 2. V-I characteristic of power diode
• 3. Significant of drift region
• SCR ( silicon controlled rectifier )
• Forward blocking mode
• Forward conducting mode
• Significance of gate
• Reverse blocking mode
• Significance of latching current
• Significance of holding current
• Definitions of holding current 
• Switching characteristic of SCR ( or) Dynamic characteristic 
• Triggering method of SCR
• a. Forward voltage triggering method
• b. Dv/ dt triggering
• c. Light triggering
• d. Thermal triggering
• e. Gate triggering
• Commutation techniques
• a. Natural commutation
• b. Forced commutation
• Classification of commutation techniques
• a. Class A Commutation technique
• b. Class B Current commutation
• c. Class C Complementary commutation / impulse
• d. Class D Voltage commutation
• Firing circuit
• Gate turn on Voltage
• UJT ( Unijunction transistor )
• 1. UJT : Working as relaxation oscillator
• 2. Synchronized UJT firing CKT
• Protection of Thyristors
• 1. Over Current protection 
• 2. Over voltage protection
• 3. Dv/dt protection
• 4. Dia/dt protection
• 5. Thermal protection
• 6. Gate protection
• Some special device
• GTO (Gate turn off Thyristor )
• ASCR ( Asymmetrical silicon controlled rectifier )
• RCT ( Reverse conducting Thyristors )
• TRIAC
• TRIAC firing CKT using a DIAC
• Power BJT
• Characteristic of power BJT
• Power MOSFET
• Ø HWR - One Pulse Converter
• RE load ( Charging Battery )
• 1-Ø FWR ( 2- pulse converter )
• 1-ø Half controlled rectifier
• Semi converter
• Harmonic analysis on AC side of converters
• Harmonic analysis on DC side of converters
• Performance of semi conductors
• Draw backs
• Three phase semi conductors
• Representation of converters
• Application
• Dual converters
• 1. Non-circulating current type
• 2. Circulating current type dual converters
• Effect of source inductance
• Inductance voltage regulation
• INVERTERS
• Classification of inverters
• 1. Voltage source inverters
• a. Single phase half bridge inverters
• b. Two phase full bridge inverters
• c. Three phase VSI
• 2. Current source inverters
• 3. Series inverters
• 4. Parallel inverters
• Harmonic analysis
• Draw backs
• Rating of thyristors
• Current source inverters (CSI)
• Harmonic analysis
• Advantage of CSI
• Disadvantage
• Auto sequential commutation inverters (ASCI)
• Series inverters
• Resonant converters
• Voltage control of inverters
• Types
• Advantages
• Disadvantages
• Application
• Types of PWM techniques
• CHOPPERS
• Stepdown choppers
• RLE loads
• Duty cycle
• Step up choppers
• CHOPPERS WITH FILTERS
• Buck regulators
• Critical inductance
• Critical capacitance
• BOOST regulators
• BUCK regulators
• BUCK-BOOST regulators
• Classification
• 1. First quardrant chopper
• 2. Second quardrant choppers
• AC voltage controllers
• Application
• Drawbacks
• Cycloconverters
• AC drives
• Slip power recovery method
• Scherbius drive
• Application
• Features
• HVDC
• Types of HVDC
• SMPS