An optimization method of zero-crossing torque shock of motor for new energy vehicles

Abstract

A method for optimize that zero-crossing torque shock of a motor of a new energy vehicle settles a problem of vehicle impact caused by the change of front and rear abutment surfaces of driving gears in the driving process of new energy vehicle, and the abutment impact of driving gears is reduced. The method comprises the steps of detecting the zero crossing torque of motor; wherein the zero crossing torque of motor includes zero crossing from positive torque to negative torque and zero crossing from negative torque to positive torque, and detecting a zero crossing point of torque by means of azero crossing detection algorithm; after the zero crossing point of torque is detected, limiting the slope of the rising or falling torque to change the original change trajectory of torque so as toachieve the purpose of reducing the zero crossing impact of torque and improving the driving comfort.

Description

technical field

[0001] The invention relates to a vehicle impact resistance method, in particular to an optimization method for motor torque zero-crossing impact. Background technique

[0002] At present, with the serious problem of environmental pollution, the state has issued a series of policies to encourage the development and development of new energy vehicle technology. Since the new energy vehicle is driven by a motor, there is an energy recovery condition during the motor drive process, the driving torque in the forward direction of the vehicle is positive, and the recovery torque is negative. When the driver steps on the accelerator, the positive torque drives the motor to rotate forward. When the driver releases the accelerator, it is in the energy recovery condition. The motor responds to the negative torque to recover energy, resulting in positive and negative changes in the motor torque, and the torque crosses zero. When the positive and negative torque of the ...

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