H - Electricity – 02 – P
Patent
H - Electricity
02
P
318/57
H02P 7/00 (2006.01)
Patent
CA 1284816
Method of and Arrangement for Controlling an H-Bridge Electric Motor Abstract A method of and an arrangement for controlling the operation of a reversible D.C. electric motor including a winding having two ends each of which is connected to both the positive and negative terminals of an electric current source through respective control switches that can be selectively closed and opened in response to command signals to apply voltage differentials across the winding with attendant electric current flow through the winding in one or the opposite direction for operating the electric motor in one or the other of its senses of rotation with intervening rotation sense reversals utilize the original command signals for deter- mining when the sense of rotation reversal would result in an excessive electric current flow through the winding. In such a case, the original command signals are temporarily replaced by substi- tute command signals of such a character that both of the winding ends are connected through the respective control switches to only one of the electric current source terminals with attendant dynamic braking of the electric motor.
577192
Adams Don L.
Novis Ari M.
Wright Stuart C.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
United Technologies Corporation
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