Method and device for determining output torque of motor and electric vehicle

Abstract

The invention provides a motor output torque determination method and device and an electric automobile, and relates to the technical field of electric automobiles, the determination method comprises the following steps: obtaining an external characteristic torque value corresponding to a current power output type according to a pre-stored external characteristic curve graph; according to a pre-stored energy recovery curve graph, an energy recovery torque value corresponding to the current energy recovery mode is obtained; acquiring an accelerator coefficient factor value corresponding to the current power output type according to a pre-stored accelerator characteristic curve graph; and according to the external characteristic torque value, the energy recovery torque value and the accelerator coefficient factor value, the current motor output torque value of the vehicle is determined. According to the scheme, the motor output torque corresponding to the combination of different power output types and different energy recovery modes is fitted through the three-dimensional curve graph, the whole vehicle calibration complexity is reduced, the occupied memory capacity is reduced through the pre-stored three-dimensional curve graph, and the cost of a whole vehicle electronic control unit is reduced.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and in particular relates to a method and a device for determining the output torque of a motor and an electric vehicle. Background technique [0002] With the rapid development of pure electric vehicles, in order to achieve a better user experience, most electric models provide different power output types. For example, sports power output, comfortable power output and economic power output will reflect different acceleration performance and dynamic response performance; The output torque and the motor output torque rate of change are reflected; and the different motor output power and motor output torque are determined according to the electronically controlled pedal map. [0003] On this basis, in order to meet the requirements of different users for vehicle battery life and braking experience, most electric models will also provide different energy recovery modes, such as weak ener...

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Problems solved by technology

[0005] The purpose of the embodiment of the present invention is to provide a method and device for determining the output torque of the motor and an electric vehicle, so as to solve the problem of obtaining the motor output corresponding to the combination of different power output types and different energy recovery modes in the prior art by using the electric control pedal map Torque will occupy too much memory capacity of the vehicle's electronic control unit

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