US 12,261,553 B2
Motor and method of controlling the same
Hyung Kwan Jang, Uijeongbu-si (KR); Hoo Dam Lee, Seongnam-si (KR); Gyeong Sik Choe, Seoul (KR); Jun Hyeok Choi, Suwon-si (KR); Byung Ho Min, Suwon-si (KR); and Tae Gyu Lee, Seoul (KR)
Assigned to HYUNDAI MOTOR COMPANY, Seoul (KR); and KIA CORPORATION, Seoul (KR)
Filed by HYUNDAI MOTOR COMPANY, Seoul (KR); and KIA CORPORATION, Seoul (KR)
Filed on Nov. 30, 2022, as Appl. No. 18/072,259.
Claims priority of application No. 10-2022-0061172 (KR), filed on May 19, 2022.
Prior Publication US 2023/0370005 A1, Nov. 16, 2023
Int. Cl. H02P 21/10 (2016.01); H02K 55/04 (2006.01); H02P 21/00 (2016.01); H02P 21/22 (2016.01)
CPC H02P 21/10 (2013.01) [H02K 55/04 (2013.01); H02P 21/0089 (2013.01); H02P 21/22 (2016.02); H02P 2207/05 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of controlling a motor, the motor including a stator on which an armature coil is wound, a rotor positioned rotatably inside the stator, and on which a superconducting field coil is wound, and a controller configured to control the motor, the controller being configured to control an armature current supplied to the armature coil and a field current supplied to the field coil, the method comprising:
comparing, by the controller, a target speed and a rated speed of the motor;
charging, by the controller, the field coil before starting the motor in response to determining that the target speed is less than or equal to the rated speed; and
driving, by the controller, the motor upon determining that a certain ratio of the field coil is charged, wherein the controller is configured to apply at least one of the field current or the armature current to the motor based on a state of the motor during driving of the motor; and
performing, by the controller, a control operation so that field magnetic flux generated by the field coil decreases in response to determining that the target speed changes and exceeds the rated speed during driving of the motor.