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Control of the Third Harmonics Injected PWM Inverter in Over Modulation Mode  

김영렬 (안양대학교 전기공학과)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.7, no.1, 2002 , pp. 101-110 More about this Journal
Abstract
A method to control the inverter output voltage lineally in over modulation mode of the third harmonics injected PWM inverter is proposed. The third harmonics injected PWM has a extended linear region compared with the sine PWM. But it still has a maximum voltage about 90% compared with the six step inverter. Therefore, to control the output voltage linearly in over modulation mode, analyzing the relationship between the modulation index and the peak of the fundamental component of the modified reference voltage, we can settle the problem in over modulation mode without iteration. Then we can increase the maximum fundamental component of the third harmonics injected PWM inverter comparative to six-step inverter continuously in over modulation mode. The simulation results of the inverter-induction motor system shows the validity of this method and experimental results prove it.
Keywords
PWM Inverter; Over Modulation; Third Harmonic;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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