Method and device for controlling electric drive system torque

A technology of electric drive system and torque control, which is applied in electric vehicles, control drive, electric energy management, etc., and can solve the problem of low control accuracy

Inactive Publication Date: 2018-06-29
重庆长安新能源汽车科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method and device for torque control of an electric drive system, which has solved the problem of low torque control accuracy of the electric drive system in the prior art

Method used

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  • Method and device for controlling electric drive system torque
  • Method and device for controlling electric drive system torque
  • Method and device for controlling electric drive system torque

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Embodiment Construction

[0028] The core of the present invention is to provide a method and device for torque control of an electric drive system, which can improve the torque control accuracy of an electric drive system assembly of a pure electric vehicle.

[0029] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but 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.

[0030] Please refer to figure 1 , figure 1 It is a flow chart of the first specific embodiment of the method for torque control of the electric drive system provided by the pr...

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Abstract

The invention discloses a method and device for controlling an electric drive system torque. The method comprises the steps that a current temperature of lubricating oil of a reducer is obtained, according to a mapping relation between a preset temperature and a reducer efficiency coefficient, the reducer efficiency coefficient under the current temperature is obtained; according to a mapping relation among a preset reducer lubricating oil temperature, an assembly requirement torque, a motor rotating speed and reducer efficiency, a reducer efficiency corresponding to a current assembly requirement torque and a current motor rotating speed is obtained; according to the reducer efficiency coefficient, the reducer efficiency, the current assembly requirement torque and the transmission ratioof the reducer, a motor output torque is determined so as to achieve the control on the electric drive system torque. The provided method and device can improve the control precision of electric drivesystem assembly torques of battery electric vehicles.

Description

technical field [0001] The invention relates to the field of electric drive system assembly, in particular to a method and device for torque control of an electric drive system. Background technique [0002] With the continuous depletion of chemical energy and the aggravation of environmental pollution, the use of electric vehicles in daily life is becoming more and more widespread. As the core component of electric vehicles, the electric drive system provides driving force for the whole vehicle. Faced with the multiple pressures of cost, miniaturization, and light weight, the electric drive system assembly with a highly integrated motor controller, drive motor, and reducer has become an important trend in the development of new energy power systems in the future. [0003] The torque control method of the pure electric vehicle electric drive system in the prior art is: the electric drive system uses the torque at the output end of the drive motor as the target control torqu...

Claims

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Application Information

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IPC IPC(8): B60L15/20B60W10/08B60W40/00
CPCB60L15/20B60W10/08B60W40/00Y02T10/72
Inventor 刘帅陈健范旭红苏岭陈兴财
Owner 重庆长安新能源汽车科技有限公司
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