Apparatus for protecting power transistors in an H configuration

Details Apparatus for protecting power transistors in an H configuration Apparatus for protecting power transistors in an H configuration

1978-06-12

1979-03-27

Mullins, James B.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

318563, 318681, 330146, 330298, 361 33, G05B 902, H03K 1760

Patent

active

041468015

ABSTRACT:
This invention relates to the protection of power transistors in an H configuration power amplifier which drives a D.C. motor. When the amplifier is switched off, it may be possible for the base terminals of the transistors to be turned "on" which results in the transistors conducting. If two series transistors conduct, the resulting short circuit may damage or destroy the transistors. This invention provides an easy and economical apparatus for protecting the transistors in the power amplifier by grounding the base input terminals of the power transistors during all times when the transistors are switched "off."

REFERENCES:
patent: 3413520 (1968-11-01), Westbrook

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