Sinusoidal wave oscillator ballast circuit

Details Sinusoidal wave oscillator ballast circuit Sinusoidal wave oscillator ballast circuit

1976-12-20

1978-02-21

Smith, Alfred E.

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

315DIG2, 315DIG5, 315239, 315278, 315205, 315265, 315 97, H05B 3702, H05B 3904, H05B 4136

Patent

active

040754766

ABSTRACT:
A sinusoidal wave oscillator ballast circuit includes a tuned oscillator coupled to a DC rectifier means coupled by a power factor correction circuit to an AC potential source. The oscillator is coupled to an inductor means including a first and second transformer means with the secondary winding of the first transformer means coupled to the oscillator, the primary of the first transformer means in series connection with a capacitor and the primary winding of the second transformer means to form a resonant circuit, a first secondary winding of the second transformer means coupled to a lamp circuit to form a load circuit shunting the capacitor of the resonant circuit and a second secondary winding of the second transformer means having opposite ends connected by clamping diodes to the DC rectifier means. Means for compensating for "storage time" of the transistor of the oscillator and for conditioning the line to transients and radio frequency interference (RFI) are also provided.

REFERENCES:
patent: 3754160 (1973-08-01), Jensen
patent: 3769545 (1973-10-01), Crane
patent: 4045711 (1977-08-01), Pitel

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