Temperature protection control method for driving motor used for pure electric car
A pure electric vehicle and drive motor technology, applied in the direction of electric vehicles, control drives, control devices, etc., can solve the problems of "sawtooth" output, affecting the comfort of the vehicle, and occasional zero-torque output, etc., to reduce hysteresis, The effect of reducing the probability of over-temperature zero torque output and improving comfort
Active Publication Date: 2020-02-21
ZHEJIANG UFO AUTOMOBILE MFG CO LTD +2
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Problems solved by technology
This method will cause problems such as "sawtooth" output of motor speed and occasional zero torque output when the driving motor is running continuously, which will affect the comfort of the vehicle
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[0035] The present invention will be described in detail below, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0036] The present invention provides a kind of driving motor temperature protection control method for pure electric vehicles through improvement, such as Figure 1-Figure 3 shown, including the following steps:
[0037] Step S1: Preset the temperature alarm value TE W , the vehicle controller according to the current operating temperature TE of the driving motor fed back by the motor controller C and the current speed n of the motor to calculate the maximum allowable torque T a...
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The invention relates to the technical field of electric cars, in particular to a temperature protection control method for a driving motor used for a pure electric car. The method comprises the following steps that S1: a temperature warning value TE<W> is preset, and current temperature maximum allowable torque T<TEC_max> is calculated by a vehicle control unit; S2: the vehicle control unit takesthe temperature warning value TE<W> as a target, and according to a temperature-torque double closed-loop control mode, driving motor output torque is maintained to be similar to maximum allowable torque T<TEC_max>; and S3: when the vehicle control unit receives a situation that the current working temperature TE<C> of the driving motor is lower than a preset hysteresis temperature lower limit value TE<CL> of the driving motor or when required torque T<demand> is not greater than the maximum allowable torque T<TEC_max> under a TE<C> condition, the temperature-torque double closed-loop controlmode stops, wherein situation is fed back by a motor controller. When the temperature limit value of the driving motor can not drive the motor to carry out large-torque output and a motor system meets a situation that a current temperature does not exceed the warning value, given output torque is maintained at a maximum value, and the motor system is maintained to stably operate under an excessive load.
Description
technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a method for temperature protection and control of a drive motor for pure electric vehicles. Background technique [0002] Under the trend of accelerating the development of the global automobile industry towards intelligence and electrification, more and more electric vehicles appear in people's real life. The motor system for electric vehicles must not only meet the requirements of running on flat roads, but also must be able to meet complex conditions such as different mountain roads, bumps, frequent start and stop, etc. If it is not good, it will seriously affect the reliability and life of the drive motor. At present, the temperature protection control of the drive motor for electric vehicles is mainly carried out by setting the temperature protection limit method for temperature protection. When the temperature of the drive motor is greater than the alarm value, ...
Claims
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IPC IPC(8): B60L15/20
CPCB60L15/20B60L2240/421B60L2240/425Y02T10/72
Inventor 邵明新张顺
Owner ZHEJIANG UFO AUTOMOBILE MFG CO LTD