Electronic ballast with low frequency AC to AC converter

Details Electronic ballast with low frequency AC to AC converter Electronic ballast with low frequency AC to AC converter

1985-06-24

1986-09-30

Dixon, Harold

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

315171, 315176, 315226, 315DIG7, H05B 3702

Patent

active

046148981

ABSTRACT:
A gas discharge lamp is started with a high frequency AC signal from an oscillator and then operates on a low frequency AC signal provided by an AC to AC converter synchronously with the AC supply line. The low voltage switching devices of the converter are protected from the high voltages of the high frequency oscillator by locking the converter in a single phase during starting.

REFERENCES:
patent: 3896336 (1975-07-01), Schreiner et al.
patent: 4170747 (1979-10-01), Holmes
patent: 4350930 (1982-09-01), Peil et al.
patent: 4484107 (1984-11-01), Kaneda et al.
patent: 4567404 (1986-01-01), Flugan
U.S. patent application Ser. No. 562,919, to Flugan, filed Dec. 19, 1983.

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