Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Patent
1978-12-27
1980-12-09
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
315224, 315290, 315DIG7, 323 22T, H05B 41392
Patent
active
042387108
ABSTRACT:
A gas discharge lamp is connected across an inductor and in series with a solid state switching device and a resistor, and this combination is connected across a voltage source. This switching device is controlled by a monostable multivibrator, the input of which is connected to the output of a comparator amplifier sensing the difference between the voltage drop across the above-mentioned resistor and a reference voltage which may be changed to vary light intensity. A supply voltage feedback control loop uses a power oscillator to maintain the voltage supplied to the inductor and the lamp at a level corresponding to a symmetrical voltage wave form in the lamp in order to maximize lamp efficiency. A reference voltage feedback control loop controls the reference voltage supplied to the comparator amplifier in order to minimize the effect of power line variations on lamp intensity while allowing controlled variations in intensity by the user. The supply voltage feedback control loop provides an input impedance to a 60-Hertz power source which is exclusively resistive and non-reactive, thereby maximizing efficiency of the power supply.
REFERENCES:
patent: 3486070 (1969-12-01), Engel
patent: 3906302 (1975-09-01), Wijsboom
patent: 4004187 (1977-01-01), Walker
patent: 4039897 (1977-08-01), Dragoset
patent: 4121136 (1978-10-01), Fournier et al.
Datapower, Inc.
LaRoche Eugene R.
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