Patent ID: 11967917
Assignee: EATON INTELLIGENT POWER LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 23:
24. A motor starter comprising:
a plurality of switches configured to selectively connect phases of an AC power source to phases of motor; and
a control circuit configured to operate the plurality of switches to connect pairs of phases of an AC power source to pairs of phases of the motor in a first sequence to thereby drive the motor, to operate the plurality of switches to disconnect all of the phases of the motor from the AC power source for a predetermined dwell interval having a duration greater than a time constant of the motor after terminating the first sequence, and to operate the plurality of switches to connecting pair of phases of the AC power source to pairs of phases of the motor in a second sequence that is reversed with respect to the first sequence to thereby brake the motor after the dwell interval, wherein the control circuit is configured to incrementally increase conduction intervals of the plurality of switches in the second sequence until a current provided to the motor reaches a predetermined limit and to limit the conduction intervals responsive to the current reaching the predetermined limit.