ELECTRIC MOTOR WITH VARYING TORQUE EFFICIENCY PROFILE

摘要

An electric motor arrangement comprising an electric motor having a rotor, a stator, a first coil set and a second coil set, wherein the first coil set is arranged to form a first sub motor with a control device being arranged to control current in the first coil set to generate a first torque on the rotor and the second coil set is arranged to form a second sub motor with the control device being arranged to control current in the second coil set to generate a second torque on the rotor, wherein the first sub motor is arranged to have a first torque efficiency profile and the second sub motor is arranged to have a second torque efficiency profile; and a controller for determining a first torque value generated by the first sub motor and a second torque value generated by the second sub motor in response to a requested torque demand based on a required torque efficiency profile for the electric motor.