Tuned oscillator ballast circuit

Details Tuned oscillator ballast circuit Tuned oscillator ballast circuit

H - Electricity

05

B

315/37

H05B 41/285 (2006.01) H02M 5/458 (2006.01) H02M 7/5383 (2006.01)

Patent

CA 1079344

TUNED OSCILLATOR BALLAST CIRCUIT ABSTRACT OF THE DISCLOSURE A fluorescent lamp ballast circuit includes a tuned oscillator coupled to a pulsed DC potential source and to a transformer having a first winding directly connected to the oscillator and in series connection with a capacitor to form a series resonant circuit. A second winding of the transformer induc- tively couples the first winding of the transformer to the oscillator, a third winding inductively couples a load across the capacitor of the series resonant circuit, and a fourth winding is inductively coupled to the first winding of the transformer and clamps the DC potential source to a given potential level. Also, protection for open circuits, short circuits, and temperature change due to changed ambient conditions or increased current flow is provided.

272089

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