PWM inverter system

Details PWM inverter system PWM inverter system

1988-05-19

1989-07-11

Wong, Peter S.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 98, 363132, H02M 112

Patent

active

048477435

ABSTRACT:
A PWM inverter system which eliminates a switching loss and minimizes the distortion ratio of the output voltage thereof. The PWM inverter system includes a first means for producing switching signals for 3-phase modulation by which switching elements for each phase make a switching operation, a second means for producing switching signals for 2-phase modulation by which a switching operation for one phase is unnecessary, and a change-over for changing over the two means in response, for example, to a magnitude value of the inverter output voltage.

REFERENCES:
patent: 4312031 (1982-01-01), Kudor
patent: 4617675 (1986-10-01), Ashikaga et al.
patent: 4720777 (1988-01-01), Yokoi
patent: 4729082 (1988-03-01), Sato
patent: 4763060 (1988-08-01), Takahashi
"Inverter Application Manual", pp. 28-34, Sep. 7, 1985.

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