Electricity: motive power systems – Motor-reversing
Patent
1981-04-27
1984-10-16
Weldon, Ulysses
Electricity: motive power systems
Motor-reversing
318293, 318345B, 318345F, H02P 122
Patent
active
044777515
ABSTRACT:
A motor brake device comprises a plurality of transistors for shunting a circuit loop through which a back electromotive force current caused by an inertia rotation of the motor flows, in which some of these transistors are operated as an inversed transistor (a transistor operated in a state where the collector and the emitter are interchanged with each other). The brake current for the motor flows through the collector-emitter paths of the transistor and the reversed transistor, each of which exhibits a small voltage drop. Therefore, the electromagnetic brake may effectively be applied to the motor even at a considerably low back electromotive force of the motor.
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Olympus Optical Co,. Ltd.
Weldon Ulysses
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