US 11,811,225 B2
Motor power supply device
Yutaka Uchida, Kariya (JP); Takanori Suzuki, Kariya (JP); and Kohei Yamazaki, Kariya (JP)
Assigned to AISIN CORPORATION, Aichi (JP)
Filed by AISIN CORPORATION, Aichi (JP)
Filed on Apr. 6, 2022, as Appl. No. 17/714,200.
Claims priority of application No. 2021-066110 (JP), filed on Apr. 8, 2021.
Prior Publication US 2022/0329067 A1, Oct. 13, 2022
Int. Cl. G05B 5/00 (2006.01); H02J 1/10 (2006.01); H02J 7/14 (2006.01); H02P 7/292 (2016.01); H02P 9/30 (2006.01)
CPC H02J 1/108 (2013.01) [H02J 7/1423 (2013.01); H02P 7/292 (2013.01); H02P 9/305 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A motor power supply device comprising:
a first power supply;
a motor that is driven by a power supplied from the first power supply;
a first power supply line that electrically connects the first power supply and the motor;
a first power supply side semiconductor switch that is disposed on a first power supply side on the first power supply line;
a first output side semiconductor switch that is connected in series with the first power supply side semiconductor switch on the first power supply line and that is disposed on an output side of the first power supply line;
a first power supply side voltage detection unit that is disposed on the first power supply side with respect to the first power supply side semiconductor switch on the first power supply line and that is configured to detect a voltage of the first power supply line;
a control unit configured to execute control to determine a state of power supply from the first power supply to the first power supply side semiconductor switch based on a measured value obtained by the first power supply side voltage detection unit; and
an output side voltage detection unit that is disposed on a motor side with respect to the first output side semiconductor switch on the first power supply line and that is configured to detect a voltage of the first power supply line, wherein
the control unit is configured to diagnose, in a first state in which the first power supply side semiconductor switch and the first output side semiconductor switch are turned on, failures of the first power supply side semiconductor switch and the first output side semiconductor switch by comparing the voltage values detected by the first power supply side voltage detection unit and the output side voltage detection unit to a threshold.