Pulse width modulated inverter with high-to-low frequency output

Details Pulse width modulated inverter with high-to-low frequency output Pulse width modulated inverter with high-to-low frequency output

1988-06-03

1989-10-31

Beha, Jr, William H.

Electric power conversion systems

Cascaded or combined, diverse conversions in which the...

Current and frequency

363 41, 363160, H02M 527

Patent

active

048781630

ABSTRACT:
In a power conversion system, a DC voltage of a DC power supply is converted into a predetermined high-frequency voltage by an inverter, and a high-frequency low voltage generated from the inverter is converted into a high-frequency high voltage by a transformer. A high-frequency high voltage generated from a secondary winding of the transformer is converted into a predetermined low-frequency voltage by a frequency changing circuit. The commutating operation of the frequency changing circuit is performed by a control circuit in response to the output current of the frequency changing circuit and in synchronism with the starting time of the short-circuiting prevention period of the inverter. As a result, the converted output of the power conversion system is prevented from decreasing.

REFERENCES:
patent: 4479175 (1984-10-01), Gille et al.
patent: 4706178 (1987-11-01), Hayashi

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