US 11,658,589 B2
Electrically commutated motor driving device and control method thereof
Yu-Wei Lee, Taoyuan (TW); Shang-Wen Hsu, Taoyuan (TW); and Wei-Shuo Tseng, Taoyuan (TW)
Assigned to DELTA ELECTRONICS, INC., Taoyuan (TW)
Filed by Delta Electronics, Inc., Taoyuan (TW)
Filed on Sep. 14, 2021, as Appl. No. 17/474,898.
Application 17/474,898 is a continuation of application No. 16/156,315, filed on Oct. 10, 2018, abandoned.
Claims priority of application No. 201711249935.3 (CN), filed on Dec. 1, 2017.
Prior Publication US 2021/0408947 A1, Dec. 30, 2021
Int. Cl. H02P 6/17 (2016.01); H02P 6/28 (2016.01); H02H 7/08 (2006.01); G01R 19/165 (2006.01); H02P 29/024 (2016.01); H02H 7/09 (2006.01); H02P 6/12 (2006.01); H02H 7/093 (2006.01)
CPC H02P 6/17 (2016.02) [G01R 19/16528 (2013.01); H02H 7/0833 (2013.01); H02H 7/09 (2013.01); H02P 6/28 (2016.02); H02P 29/027 (2013.01); H02H 7/093 (2013.01); H02P 6/12 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An electrically commutated motor driving device for driving a motor, comprising:
a voltage detector, detecting a supply voltage to generate a voltage detection signal;
an electrically commutated motor driver, supplied by the supply voltage and generating an operating current according to an electrically commutated signal to drive the motor;
a current detector, detecting the operating current to generate a current detection signal;
a voltage converter, converting the supply voltage into an internal voltage;
a controller, supplied by the internal voltage and generating the electrically commutated signal according to a plurality of control parameters, wherein when the controller determines, according to the control parameters, that a specific event has occurred, the controller first stops generating the electrically commutated signal and then stores the control parameters prior to the moment at which the specific event is occurred, wherein when the controller receives a shutdown instruction from a host, the controller first stops generating the electrically commutated signal and then stores the control parameters,
a storage device, configured to store the control parameters, wherein the storage device and the controller are physically separated, wherein the control parameters comprise a rotating-speed value of the motor, a current value of the operating current, and a voltage value of the supply voltage; and
an energy storage device, coupled to the internal voltage, wherein when the controller determines, according to the voltage detection signal, that the supply voltage is less than a predetermined voltage, the controller determines that the voltage abnormal event has occurred, wherein the energy storage device maintains the internal voltage for a predetermined period so that the controller stops generating the electrically commutated signal and stores the control parameters in the storage device during the predetermined period.