Accession Number:

ADD007907

Title:

D. C. - A. C. Inverter Protection.

Descriptive Note:

Patent Application,

Corporate Author:

DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s):

Report Date:

1980-10-01

Pagination or Media Count:

11.0

Abstract:

The A.C. synthesizer is a unit developing several hundred watts at 60 Hz by pulse-width modulation techniques, with an 8 KHz sawtooth oscillator modulating a 60 Hz reference. Several failure modes common to electronic equipment caused the output stages designed for a pulse rate of 8 KHz to experience inputs from 60 Hz to as low as D.C., which inputs destroy expensive transistors. The addition of a retriggerable one-shot monostable multivibrator to inhibit the pulse width modulator output if not retriggered each 8 KHz cycle eliminates the catastrophic effect of most failure modes, allowing the output stage to reject low frequency pulses. Author

Subject Categories:

  • Electrical and Electronic Equipment
  • Electric Power Production and Distribution

Distribution Statement:

APPROVED FOR PUBLIC RELEASE