US 11,807,250 B2
Control apparatus for electric motor and vehicle
Sho Okazaki, Toyota (JP); Takumu Honda, Okazaki (JP); Toshinori Okochi, Toyota (JP); Yasutaka Tsuchida, Toyota (JP); Yoshinori Ogami, Kariya (JP); and Hiroki Nakane, Kariya (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Apr. 22, 2022, as Appl. No. 17/660,311.
Claims priority of application No. 2021-073551 (JP), filed on Apr. 23, 2021.
Prior Publication US 2022/0340147 A1, Oct. 27, 2022
Int. Cl. H02K 9/19 (2006.01); H02K 11/215 (2016.01); H02K 11/25 (2016.01); B60W 40/12 (2012.01); B60W 30/18 (2012.01); B60W 40/105 (2012.01)
CPC B60W 40/12 (2013.01) [B60W 30/18018 (2013.01); B60W 40/105 (2013.01); B60W 2510/087 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A control apparatus for controlling an electric motor mounted on a vehicle, the control apparatus comprising:
a rotor temperature estimation unit estimating a temperature of a rotor based on stator temperature information from a stator temperature identification unit for identifying a temperature of a stator, refrigerant temperature information from a refrigerant temperature identification unit for identifying a temperature of refrigerant used to cool the electric motor, and rotation speed information about the rotor from a rotation speed identification unit for identifying a rotation speed of the rotor;
a control unit controlling at least one of an output characteristic and a drive condition of the electric motor based on the temperature of the rotor estimated by the rotor temperature estimation unit;
an electric power source cutoff time identification unit identifying electric power source cutoff time during which an electric power source for the vehicle is cut off; and
a start-up temperature estimation unit estimating a temperature of the rotor at the time of energizing the vehicle for which the electric power source cutoff time has ended, based on the electric power source cutoff time and a temperature of the rotor, estimated by the rotor temperature estimation unit, immediately before cutting off the electric power source.