Electronic ballast with trapezoidal voltage waveform

Details Electronic ballast with trapezoidal voltage waveform Electronic ballast with trapezoidal voltage waveform

1993-04-27

1994-08-23

Mis, David

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

315 58, 315226, 315307, 315DIG5, H05B 4129, H05B 4136

Patent

active

053410670

ABSTRACT:
An electronic ballast is connected with the AC power line voltage of an ordinary electric utility power line and powers a fluorescent lamp with a substantially sinusoidal current of frequency substantially higher than that or the AC power line voltage. Within the electronic ballast is a half-bridge inverter, whose output voltage exhibits a substantially trapezoidal waveshape. The inverter is powered from a substantially constant DC voltage whose absolute magnitude if substantially higher than the absolute peak magnitude of the AC power line voltage.

REFERENCES:
patent: 5047690 (1991-09-01), Nilssen
patent: 5164637 (1992-11-01), Nilssen
patent: 5166578 (1992-11-01), Nilssen
patent: 5233270 (1993-08-01), Nilssen

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