File Name: Thyristor Controlled Power For Electric Motors
File Type: PDF
Pages: 233
File Size: 6616 KB

Content

• Power Electronics And Rotating Electric Drives
• Introduction
• Power Electronics
• The Thyristor
• Rotating Electric Drives
• The Direct Current Drive
• The Alternating Current Drive
• Choice Of Drive And Control System
• References And Bibliography
• The Thyristor
• Introduction
• Semiconductors
• The Diode
• The Transistor
• Cutoff
• Linear Region
• Saturation
• The Thyristor
• The Diode Model Of The Thyristor
• The Two Transistor Model Of The Thyristor
• Thyristor Characteristics

The Thyristor Reverse Biased

Intermittent Ratings

• Thyristor Manufacture
• Thyristors In Circuits
• Thyristors In Series
• Thyristors In Parallel
• Circuits To Turn On Thyrsitors
• Direct Current Firing Signals
• Pulse Firing Signals
• Alternating Current Firing Signals
• Circuits To Turnoff Thyristors
• Self Commutation By Resonance
• Auxiliary Resonant Turnoff
• Parallel Capacitance Turnoff
• Series Capacitance Turnoff
• Thyristor Protection Circuits
• Overvoltage
• Voltage Surges
• Relative Merits Of Thyristors
• The Bidirectional Triode Thyristor
• Summary
• Worked Examples

References And Bibliography

• Problems
• Induction Motor Control
• Introduction
• Induction Motor Starting
• Induction Motor Speed Control
• Thyristor Systems For Speed Control
• Thyristor Controlled Power For Electric Motors
• The Alternating Current Switch
• Worked Example
• Inverters
• Inverter Classification
• A C Inverter For A Single Phase Induction Motor
• Analysis Of A C Inverter With Resistive
• Load
• A Class Inverter For A Three Phase Induction
• Motor
• Inverter Commutation
• The Mc Mu “Ay Inverter
• Worked Example
• The Mc Murray Bedford Inverter
• Auxiliary Commutating Supply

Voltage Proportional To Frequency

• Variable Ratio Transformer
• Variable Voltage Converter
• Inverter Voltage Control
• Harmonic Elimination
• Multiple Pulse Width Control
• Selected Harmonic Reduction
• Harmonic Neutralization By Wave Synthesis
• Appraisal Of Thyristor Three Phase Inverters
• Inverters In The Induction Motor Rotor Circuit
• References
• Problems
• Direct Current Motor Control
• Introduction
• Starting Direct Current Motors
• Thyristors And The Resistance Starter
• Thyristor Controlled Power For Electric Motors
• Thyristor Starting Without Resistance
• Speed Control Of Direct Current Motors
• Thyristor Speed Control

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