Title :
Simplified measuring technique for the fundamental output voltage of the PWM inverter
Author :
Morimoto, Masayuki ; Sumito, Kiyotaka ; Sato, Sinji ; Hoshino, Akihiro ; Oshitani, Katsumi
Author_Institution :
Mitsubishi Heavy Ind. Ltd., Yokohama, Japan
Abstract :
The variable-voltage variable-frequency (VVVF) drive of an induction motor requires careful designing of the output voltage of a voltage source inverter, especially the fundamental component of the output voltage. A simplified measuring technique for obtaining the fundamental component of the output voltage is presented. The mean value of the PWM waveform is used for the purpose. It is found that the fundamental component of the PWM waveform can be expressed by the contents of zero vectors in the space vector expression. The analysis of this space vector voltage equation makes it possible to use the mean value of the voltage as the fundamental component. Experimental results show that the indicated value of the rectifier-type voltmeter approximates the RMS-value of the fundamental component.<>
Keywords :
electric drives; induction motors; invertors; pulse width modulation; voltage measurement; PWM inverter; RMS-value; drive; fundamental output voltage; induction motor; rectifier-type voltmeter; space vector expression; space vector voltage equation; variable-frequency; variable-voltage; voltage measurement; voltage source inverter; zero vectors; Bridge circuits; Drives; Functional analysis; Insulation; Pulse width modulation; Pulse width modulation inverters; Voltage;
Conference_Titel :
Industry Applications Society Annual Meeting, 1990., Conference Record of the 1990 IEEE
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-87942-553-9
DOI :
10.1109/IAS.1990.152209
