Patent ID: 11923794
Assignee: DELTA ELECTRONICS, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A method of operating a motor control apparatus, the motor control apparatus receiving a DC power source through a DC terminal and coupled to a motor; the motor control apparatus comprising a brake, an inverter, and a power supply coupled to the DC terminal; the brake comprising an energy-consuming component and a switch component coupled between a high-voltage terminal and a low-voltage terminal of the DC terminal; the switch component is a three-way switch having a first contact, a second contact, a third contact, and a magnet-exciting coil; a state between the first contact and the second contact is a normally-open state, and a state between the second contact and the third contact is a normally-closed state; the first contact is coupled to the high-voltage terminal or the low-voltage terminal, and the second contact is coupled to the inverter; the third contact is coupled to the energy-consuming component, and the magnet-exciting coil is coupled to the power supply, the method comprising steps of:
controlling the inverter to convert the DC power source into an output power source to drive the motor,
determining whether the DC power source is interrupted to decide whether to stop controlling the inverter,
stopping controlling the inverter when the DC power source is interrupted, and
self-driven turning on the switch component when the DC power source is interrupted so that a back electromotive force generated by the motor is consumed through the energy-consuming component.