Power Semiconductor Controlled DrivesA study of power semiconductor controlled drives that contain dc, induction and synchronous motors. Discusses the dynamics of motor and load systems; open and closed-loop drives; and thyristor, power transistor, and GTO converters. Also reviews arc drives, brushless and commutatorless dc drives, and rectifier controlled dc drives. Annotation copyrighted by Book News, Inc., Portland, OR |
Contents
DC MOTORS | 35 |
RECTIFIER CONTROL OF DC MOTORS | 65 |
CHOPPER CONTROL OF DC DRIVES | 145 |
Copyright | |
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3-phase air-gap angle control armature current back emf base speed Calculate capacitor chopper circuit of figure closed-loop constant flux controlled flywheeling controlled rectifier copper loss core loss current control current source inverter cycloconverter dc link dc motor decrease diode bridge discontinuous conduction dynamic braking equivalent circuit field current firing angle full-load fully-controlled rectifier fundamental harmonic Hence increase induction motor load commutated load torque machine magnet margin angle mode motor current motor drives motor speed motor torque motoring operation negative no-load obtained output voltage phasor power factor pulse-width modulation quadrant R₁ rad/sec rated torque ratio reactance reduced regenerative braking reverse ripple rotor resistance S₁ separately excited motor shown in figure sinusoidal slip speed snubber source voltage speed control speed-torque curves stator switch synchronous motor synchronous speed T₁ thyristor torque angle transistor V₁ variable frequency voltage control voltage source waveform zero