Circuit for detecting a malfunction in a self-commutating...

Details Circuit for detecting a malfunction in a self-commutating... Circuit for detecting a malfunction in a self-commutating...

G - Physics

01

R

324/58

G01R 31/02 (2006.01) H02H 7/122 (2006.01) H02M 7/515 (2006.01)

Patent

CA 1080805

A CIRCUIT FOR DETECTING A MALFUNCTION IN A SEIF-COMMUTATING INVERTER ABSTRACT OF THE DISCLOSURE A circuit for detecting a malfunction in an inverter. The circuit includes means coupled to the center tap of a commutating interval current limiting reactor which is connected in series with and interposed between a pair of gate controlled rectifiers for generating a first signal upon detecting and for the duration of an interval when both of the rectifiers are ON. The circuit further provides means, responsive to a first pulse used to initiate an interval when either of the pair of rectifiers is to be "ON", for generating a second signal having a duration greater than the normal duration of the first signal. Also provided is a means responsive to the first and second signals for generating a control signal to cause cessation of the operation of the inverter, if the second signal is absent during the occurrence of the first signal.

285544

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