초록 ▼

The motor braking system for use with an alternating 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 operation, discharges when the motor is turned off and thus provides a pulse of energizing cu

The motor braking system for use with an alternating 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 operation, 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.

대표청구항 ▼

An electronic braking system for supplying a DC braking current to an AC induction motor for a predetermined amount of time after said motor is disconnected from an electric power source, said system providing mechanical braking to said motor when said braking current is terminated, said system comp

An electronic braking system for supplying a DC braking current to an AC induction motor for a predetermined amount of time after said motor is disconnected from an electric power source, said system providing mechanical braking to said motor when said braking current is terminated, said system comprising: a power circuit for connection to said power source to provide DC braking current to said motor; means for rapidly connecting said power circuit between said motor and said electric power source in response to an energizing current; means for generating a pulse of energizing current when said motor is disconnected from said power source; means for supplying an energizing current for a predetermined time; and means for providing mechanical braking of said motor when said DC braking current is terminated.