Inverter having forced turn-off

Details Inverter having forced turn-off Inverter having forced turn-off

H - Electricity

02

M

321/55

H02M 1/08 (2006.01) H02M 7/537 (2006.01) H02M 7/538 (2006.01)

Patent

CA 1062331

ABSTRACT OF THE DISCLOSURE An electrical inverter circuit is provided for converting a DC electrical input into an AC electrical output. Alternately-switching semiconductor switches in the primary winding circuit of an output transformer are controlled by a control semiconductor. The control semiconductor is in circuit with the semiconductor switches and also carries primary winding current. A control circuit synchronously increases the electrical impedance of the control semiconductor during at least a portion of each switching transition of the semi- conductor switches to aid the switching action. A circuit is included for detecting the switching point as a function of primary winding current and controlling the switching transition of the semiconductor switches during the time of increased electrical impedance of the control semiconductor.

237421

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