Patent ID: 11884162
Assignee: HYUNDAI MOTOR COMPANY
Field: Transport (Mechanical engineering)
Classification: CPC B  Y | IPC B  G

Claim 7:
8. A motor control method for a commercial vehicle having an electric axle, the method comprising:
detecting, by an accelerator position sensor, a degree to which an accelerator is depressed;
detecting, by a wheel speed sensor, a wheel speed change;
determining, by a controller, a driver's required torque based on detection signals of the accelerator position sensor and the wheel speed sensor, respectively; and
upon determining the driver's required torque, controlling, by the controller, a first motor torque of a first motor disposed in a rear-wheel electric axle to approach a target torque for satisfying the driver's required torque, according to a magnitude of the determined driver's required torque while either controlling a second motor torque of a second motor disposed in the rear-wheel electric axle to a level that compensates for a torque error of the first motor or controlling the first motor torque and the second motor torque at alternating fixed duty ratios,
wherein, when the first motor torque and the second motor torque are controlled at the alternating fixed duty ratios, a maximum-torque period for the first motor and a maximum-torque period for the second motor are determined as being shorter than a time taken for a temperature of each motor to reach a maximum reference temperature.