Electronic motor braking system

Details Electronic motor braking system Electronic motor braking system

H - Electricity

02

P

318/84

H02P 3/24 (2006.01) H02P 3/26 (2006.01)

Patent

CA 1167098

ABSTRACT OF THE DISCLOSURE The motor braking system for use with an alter- nating current motor and an AC power source includes a power circuit for supplying a DC braking current to the motor. A capacitor which was charged during motor opera- tion, discharges when the motor is turned off and thus provides a pulse of energizing current to a contactor which quickly connects the power circuit to the motor and starts the electric braking cycle as soon as the AC source is disconnected from the motor. A timing circuit is also started and maintains the energizing current for a predetermined amount of time while the motor is coming to a stop. A mechanical brake may also be used to complete the stopping sequence if desired, with the mechanical brake being engaged when the braking current is terminated.

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