US 11,942,881 B2
Motor parameter measuring device and method
Jae Sang Park, Yongin-si (KR)
Assigned to HL MANDO CORPORATION, Gyeonggi-Do (KR)
Filed by HL MANDO CORPORATION, Pyeongtaek-si (KR)
Filed on Jun. 2, 2022, as Appl. No. 17/831,161.
Claims priority of application No. 10-2021-0074007 (KR), filed on Jun. 8, 2021.
Prior Publication US 2022/0393628 A1, Dec. 8, 2022
Int. Cl. H02P 21/22 (2016.01); H02P 21/14 (2016.01); H02P 27/06 (2006.01)
CPC H02P 21/22 (2016.02) [H02P 21/14 (2013.01); H02P 27/06 (2013.01); H02P 2207/05 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A motor parameter measuring device, comprising:
a torque receiver receiving a motor torque of a motor rotated by an external force;
a motor constant calculator calculating a motor constant based on the motor torque; and
a parameter calculator controlling an inverter connected with the motor to form a closed circuit, in which multiple phases of the motor are connected to each other, by simultaneously turning on a high-side switching element or a low-side switching element for each phase of the inverter, and calculating a parameter of the motor based on a current generated by the rotating motor in the closed circuit, in which the multiple phases of the motor are connected to each other,
wherein the motor constant calculator calculates the motor constant with a synchronous coordinate system d-axis current fixed to 0.