Noninteractive heater power supply

Details Noninteractive heater power supply Noninteractive heater power supply

1977-09-02

1980-03-18

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307296A, 307240, 323 18, 219 1055B, 307311, H03K 342, H05B 906

Patent

active

041941608

ABSTRACT:
A high efficiency regulated heater power supply which avoids the interactive effects of varying magnetic field around the heater on tube operating parameters. The technique employed is to "chop" the low frequency (typically, 60 Hz) supply at a high frequency 10 kHz, for example, rate. Regulation is accomplished by sensing RMS voltage across the heater (filament) and adjusting the "chopping" duty cycle to maintain constant RMS heater voltage. The aforementioned magnetic field effects are prevented by synchronizing the "chopping" frequency with the tube pulse rate, such that the tube heater (filament) is actually deenergized and operating on thermal inertia only during tube pulsed operation.

REFERENCES:
patent: 4005370 (1977-01-01), Kusunoki et al.
patent: 4023004 (1977-05-01), Burke

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