Electric automobile double-motor driving system and power coupling comprehensive control method thereof

A dual-motor drive, electric vehicle technology, applied in electric vehicles, control drives, control devices, etc., can solve the problems of large changes in the working range of the motor and low power system efficiency.

Inactive Publication Date: 2020-02-25
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The driving method of single motor plus single-stage reducer will cause the working range of the motor to vary greatly with the driving conditions, and cannot be concentrated in the high-efficiency range, resulting in low efficiency of the power system under comprehensive working conditions

Method used

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  • Electric automobile double-motor driving system and power coupling comprehensive control method thereof
  • Electric automobile double-motor driving system and power coupling comprehensive control method thereof
  • Electric automobile double-motor driving system and power coupling comprehensive control method thereof

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Embodiment Construction

[0039] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0040] Such as figure 1 , 2 As shown, a dual-motor drive system for electric vehicles designed in the present invention includes a vehicle controller, and the vehicle controller includes a torque speed demand calculation module, and the torque speed demand calculation module is used to receive vehicle state information (vehicle speed , slope), motor status information (speed, torque) and battery status and other information; the output end of the torque speed demand calculation module is connected to the work mode determination module, and the output end of the work mode determination module is co...

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Abstract

The invention discloses an electric automobile double-motor driving system and a power coupling comprehensive control method thereof. The electric automobile double-motor driving system is adopted, through a power coupling mode of a planetary gear mechanism, torque and rotational speed coupling under different working conditions of the electric automobile driving system is achieved, the double-motor driving system has a power-split type transmission regulating function capable of realizing continuous speed regulation and torque regulation, working states of electric automobile motors can be effectively adjusted, the motor efficiency is improved, according to the power coupling comprehensive control method, a working mode is matched under the condition that a demand rotating speed and torque are certain, an economy control strategy is established, rotating speeds and torque of the double motors are distributed, the double motors can work in a high energy efficiency state, and a comprehensive shifting control strategy of medium-low load economical shifting and medium-high load power shifting is realized.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle transmission drive control, in particular to an electric vehicle dual-motor drive system and a power coupling comprehensive control method thereof. Background technique [0002] Improving the energy efficiency of electric vehicle motors during driving can effectively increase the cruising range of electric vehicles. According to the distribution of motor efficiency, the efficiency of the motor is higher near its rated speed, and the efficiency is lower in the high-speed and low-speed ranges. The difference The maximum can reach about 30%, so the energy efficiency of the motor can be effectively improved by adjusting the working range of the motor. [0003] The patent application number 201710095652.1 describes a dual-motor drive system and control method for electric vehicles, including a vehicle signal unit, a vehicle controller, a first motor controller, a second motor controller, a low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/28B60L15/38
CPCB60L15/28B60L15/38B60L2240/423Y02T10/72
Inventor 田晋跃盛家炜
Owner JIANGSU UNIV
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