US 12,224,695 B2
Motor control device for achieving safe and efficient braking and motor braking method thereof
Chien-Tsung Hung, Hsinchu (TW); Yu-Kai Wong, Hsinchu (TW); and Meng-Che Tsai, Hsinchu (TW)
Assigned to WELTREND SEMICONDUCTOR INC., Hsinchu (TW)
Filed by WELTREND SEMICONDUCTOR INC., Hsinchu (TW)
Filed on Mar. 20, 2023, as Appl. No. 18/123,340.
Claims priority of application No. 111149379 (TW), filed on Dec. 22, 2022.
Prior Publication US 2024/0213895 A1, Jun. 27, 2024
Int. Cl. H02P 3/18 (2006.01)
CPC H02P 3/18 (2013.01) 9 Claims
OG exemplary drawing
 
1. A method for braking a motor, the motor being coupled to a motor control device, the motor control device comprising a set of high-side switches, a set of low-side switches, a capacitor and a controller, the set of high-side switches and the set of low-side switches being coupled to the motor, the capacitor being coupled to the set of high-side switches, the controller being coupled to the capacitor, the set of high-side switches and the set of low-side switches, the method comprising:
after the motor is disconnected from an external power supply, the controller receiving a supply voltage from the capacitor, turning on the set of low-side switches, and turning off the set of high-side switches;
determining whether the supply voltage is less than a first target voltage; and
if the supply voltage is less than the first voltage, the controller turning off the set of low-side switches and turning off the set of high-side switches.