Inverter circuit with symmetry control

Details Inverter circuit with symmetry control Inverter circuit with symmetry control

1981-12-24

1984-01-31

Wong, Peter S.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363 98, 363 17, 363 56, H02M 7537

Patent

active

044293593

ABSTRACT:
An inverter circuit having transistor switches connected to alternately and repetitively apply a-c electrical energy to a load such as a fluorescent lamp. An oscillator control circuit supplies control pulses to the transistor switches in a manner to control their switching to insure a symmetrical waveform at the load. D-C power for the oscillator control circuit is obtained by rectification of the a-c load energy, and the oscillator frequency is adjustable by means of a control voltage.

REFERENCES:
patent: 2928994 (1960-03-01), Widakowich
patent: 3146406 (1964-08-01), Wilting
patent: 3155875 (1964-11-01), Wenrich et al.
patent: 3414801 (1968-12-01), Bishop et al.
patent: 3611021 (1971-10-01), Wallace
patent: 3723848 (1973-03-01), Miller
patent: 3859586 (1975-01-01), Wadlington
patent: 4042855 (1977-08-01), Buenzli
patent: 4053813 (1977-10-01), Kornrumpf
patent: 4060751 (1977-11-01), Anderson

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