US 12,438,418 B2
Dual motor actuator and method of controlling the same
Jung Jin Lee, Sejong-si (KR)
Assigned to KOREA AEROSPACE RESEARCH INSTITUTE, Daejeon (KR)
Filed by KOREA AEROSPACE RESEARCH INSTITUTE, Daejeon (KR)
Filed on Jun. 7, 2023, as Appl. No. 18/330,700.
Claims priority of application No. 10-2022-0075689 (KR), filed on Jun. 21, 2022.
Prior Publication US 2023/0412048 A1, Dec. 21, 2023
Int. Cl. H02K 7/10 (2006.01); H02K 7/116 (2006.01); H02K 7/20 (2006.01); H02P 5/48 (2016.01)
CPC H02K 7/20 (2013.01) [H02K 7/116 (2013.01); H02P 5/48 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A dual motor actuator comprising:
a main motor actuator outputting a torque to a main output shaft by comprising a main motor and a main reduction gear;
an auxiliary motor actuator outputting a torque to an auxiliary output shaft by comprising an auxiliary motor and an auxiliary reduction gear; and
a clutch connecting the main output shaft and the auxiliary output shaft to each other,
wherein the clutch comprises a fixed clutch connected to the main output shaft and a movable clutch coupled to or released from the fixed clutch and connected to the auxiliary output shaft, and
the dual motor actuator further comprises an output unit connected to the movable clutch and transmitting an output from the main motor actuator or the auxiliary motor actuator;
wherein a capacity of the main motor is greater than a capacity of the auxiliary motor, and
wherein a torque output of the main motor and a torque output of the auxiliary motor are set according to a equation below,
T1=T2+(JC+J2)ω
where, T1: a torque output of the main motor actuator, T2: a torque output of the auxiliary motor actuator, JC: a mass moment of inertia of the clutch, and, J2: a mass moment of inertia of the auxiliary reduction gear.