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

Claim 0:
1. A motor control apparatus receiving a DC power source through a DC terminal, and coupled to a motor, the motor control apparatus comprising:
a brake comprising an energy-consuming component, a switch component, a first end, and a second end; wherein the first end is coupled to a high-voltage terminal of the DC terminal, and the second end is coupled to a low-voltage terminal of the DC terminal; the energy-consuming component is coupled between the first end and the second end through the switch component,
an inverter coupled to the first end and the second end,
a controller coupled to the DC terminal, and configured to control the inverter to convert the DC power source to drive the motor, and
a power supply, coupled to the DC terminal,
wherein 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,
wherein when the controller determines that the DC power source is interrupted, the controller stops controlling the inverter and the switch component is self-driven turned on so that a back electromotive force generated by the motor is consumed through the energy-consuming component.