This paper develops a novel pulse-width modulation (PWM) strategy for application in uninterruptible power supply (UPS) and ac motor drive systems. The voltage/current harmonic spectra and other properties of this PWM scheme are thoroughly investigated. This modulation strategy is compared with other modulation techniques, especially with the commonly used sinusoidal modulation scheme, from the standpoints of simplicity, inverter switching losses, motor losses, and other output performance features. This novel modulation scheme produces an acceptable motor current waveform while keeping the number of inverter communications low. Implementation of this scheme is quite simple in hardware-based as well as microprocessor-based systems. A 5-hp prototype induction motor drive system has been built to implement this improved PWM scheme. Motor performance is quite satisfactory and confirms theoretical predictions.
Improved PWM control strategy for inverters and induction motor drives
Eine neue Methode der Pulsmodulation fuer Netzgeraete und Asynchronmaschinenantriebe
IEEE Transactions on Industrial Electronics ; 31 , 1 ; 43-50
1984
8 Seiten, 11 Bilder, 1 Tabelle, 13 Quellen
Aufsatz (Zeitschrift)
Englisch
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