Power Electronic Control of AC Motors |
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Page 80
... phase - controlled converter , there is no overlap and the dc current , I , transfers instantaneously from phase to phase at each commutation . If the transformer has a leakage inductance per phase , L , as in Fig . 3.12 ( a ) , the ...
... phase - controlled converter , there is no overlap and the dc current , I , transfers instantaneously from phase to phase at each commutation . If the transformer has a leakage inductance per phase , L , as in Fig . 3.12 ( a ) , the ...
Page 82
... phase - controlled converter with a greater than 90 degrees , all the equations derived in Section 3.3.2 are valid for inverter operation . Figure 3.14 shows the anode - cathode voltage of a thyristor in an inverter circuit , assuming ...
... phase - controlled converter with a greater than 90 degrees , all the equations derived in Section 3.3.2 are valid for inverter operation . Figure 3.14 shows the anode - cathode voltage of a thyristor in an inverter circuit , assuming ...
Page 159
... phase diode bridge rectifier con- nected in parallel with the CSI across the motor terminals and feeding a series string of Zener diodes that determine the ... phase ac network Id T Phase- controlled converter DC - AC INVERTER CIRCUITS 159.
... phase diode bridge rectifier con- nected in parallel with the CSI across the motor terminals and feeding a series string of Zener diodes that determine the ... phase ac network Id T Phase- controlled converter DC - AC INVERTER CIRCUITS 159.
Common terms and phrases
ac supply adjustable-frequency adjustable-speed adjustable-speed drive airgap flux amplitude Appl applications armature brushless dc motor capacitor characteristics component Conf constant copper loss current waveforms cycloconverter dc link voltage device diode drive system electrical Equation fundamental gate gate turn-off thyristors half-cycle harmonic currents IEEE IEEE Ind IEEE Trans increased induction motor induction motor drive inductor input inverter drive junction load current maximum modulation modulation index MOSFET motor current motor operation motor torque n-p-n transistor on-state output voltage per-unit permanent magnet phase current phase-controlled phasor pole voltage positive power factor power semiconductor pulse PWM inverter rated rectifier reduced reluctance motor reverse rotation rotor servo shaft shown in Fig signal sine wave single-phase sinusoidal slip frequency snubber speed control static stator current stator voltage supply frequency supply voltage switching synchronous motor three-phase thyristor tion torque torque angle torque-speed transistor turn-off vector voltage and current voltage waveform volts/hertz winding zero