Circuit arrangement of a self protecting power switch

Details Circuit arrangement of a self protecting power switch Circuit arrangement of a self protecting power switch

1987-11-10

1989-09-12

Jennings, Derek S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

261 93, 261101, 261103, H02H 320

Patent

active

048665568

ABSTRACT:
In power switches, conductive coupling of the control signal inputs to the power switching stage, and to the load to be switched, can result in impairment of control function. Moveover these power switches known in the art, have the disadvantage that the drive circuit and power switching stage must lie at the same potential. An improved self protecting power switch includes a first drive unit and a second drive circuit that are connected together via a pulse transformer. The first drive unit generates successive pulse trains in response to a control signal. A second drive unit regenerates square wave signals for the control of the power switching stage.

REFERENCES:
patent: 4449157 (1984-05-01), Chew
patent: 4602308 (1986-07-01), Montague
patent: 4727448 (1988-02-01), Hanguda et al.
patent: 4750079 (1988-06-01), Foy et al.
"GESmart Module Simplifies Motor Drive Design", Donald J. MacIntyre Jr., General Electric Company, 11/85.
"Smarte Power-Module", Klaus-Dieter Tetzlaff, Markt&Technik Nr. 15, vom. 11, Apr. 1986, pp. 78, 83-84.
"MOSFET Measures Current with No Loss", Frank Goodenough, Electronic Design, Feb. 20, 1986, pp. 59-60.
Travis; "Power-MOSFET Sense Terminal Allows No-Loss Load Sensing"; EDN, Jul. 10, 1986; p. 56.

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