Title :
Eliminate the adverse effects of PWM operation [in AC motor drives]
Author :
Chambers, Derek ; Jouanne, Annette Von ; Wallace, Alan ; Dai, Shaoan ; Baker, Richard H.
Author_Institution :
Spellman High Voltage, Hauppauge, NY, USA
Abstract :
The increased application of PWM ASDs for efficient speed/torque control of AC motors has resulted in a growing number of costly motor-drive-related process failures. This paper presents a novel resonant converter ASD that is designed to provide sinusoidal voltages and currents at controlled slip for speed and torque control of AC motors. The approach inherently eliminates the adverse effects of PWM ASDs including overvoltages, shaft voltage/bearing currents and EMI. This resonant power converter technology employs isolated series resonant inverters and a reverse power circuit to generate fast response variable amplitude/frequency sine wave currents and voltages. A description of the power converter configuration, control circuits and simulation results are presented.
Keywords :
AC motor drives; AC-DC power convertors; DC-AC power convertors; PWM invertors; PWM power convertors; electric current control; electromagnetic interference; harmonic distortion; harmonics suppression; machine control; power conversion harmonics; rectifying circuits; resonant power convertors; torque control; variable speed drives; velocity control; voltage control; EMI elimination; PWM ASD; adjustable speed drives; control circuits; controlled slip; isolated series resonant inverters; motor-drive-related process failures; overvoltages elimination; power converter configuration; resonant converter ASD; resonant power converter technology; reverse power circuit; shaft voltage/bearing currents elimination; simulation results; sinusoidal currents; sinusoidal voltages; speed control; torque control; AC motors; Electromagnetic interference; Pulse width modulation; Resonance; Shafts; Surges; Torque control; Torque converters; Variable speed drives; Voltage control;
Conference_Titel :
Industry Applications Conference, 2001. Thirty-Sixth IAS Annual Meeting. Conference Record of the 2001 IEEE
Conference_Location :
Chicago, IL, USA
Print_ISBN :
0-7803-7114-3
DOI :
10.1109/IAS.2001.955907
