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Energy consumption-oriented parameter optimization and matching method for dual-motor power system of pure electric vehicle

A technology for pure electric vehicles and power systems, which is applied in the field of parameter optimization and matching of dual-motor power systems of pure electric vehicles, and can solve problems such as inaccurate optimization results.

Inactive Publication Date: 2017-04-26
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the above studies failed to fully consider the distribution of the speed and torque of the two motors under different operating modes in the optimization of the dynamic parameters of the dual motors, resulting in inaccurate optimization results

Method used

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  • Energy consumption-oriented parameter optimization and matching method for dual-motor power system of pure electric vehicle
  • Energy consumption-oriented parameter optimization and matching method for dual-motor power system of pure electric vehicle
  • Energy consumption-oriented parameter optimization and matching method for dual-motor power system of pure electric vehicle

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Embodiment Construction

[0077] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but it should not be understood that the scope of the subject matter of the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various replacements and changes made according to common technical knowledge and conventional means in this field shall be included in the protection scope of the present invention.

[0078] In this example, a certain type of pure electric vehicle from a Chongqing Automobile Co., Ltd. is taken as the research object, and its power index is: the maximum speed v max 120km / h, 100km / h acceleration time a t 18s, the maximum climbing degree I max 30%. The basic parameters of the electric vehicle are shown in Table 1.

[0079] Table 1 vehicle parameters

[0080]

[0081] NEDC operating conditions and required power such as image 3 .

...

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Abstract

The invention aims to seek optimal dual-motor power parameters by considering contradiction between power performance and economical efficiency, and improve the power performance and endurance of a pure electric vehicle by reasonably selecting the dual-motor power parameters, and discloses an energy consumption-oriented parameter optimization and matching method for a dual-motor power system of the pure electric vehicle. The parameter optimization and matching method comprises the following steps of performing preliminary parameter matching on a dual-motor torque and rotary speed coupling structure, which is researched previously and has four working modes, based on an NEDC working condition and the like; next, on the basis of comprehensive consideration of the power performance and the economical efficiency of the electric vehicle, establishing a dual-motor power system parameter optimization model which takes acceleration time in 100 kilometers and specific energy consumption as a target, takes motor power, rotary speed, and transmission ratio as optimization variables, and takes power performance as constraint; and finally, solving the optimization model by a crossed particle swarm optimization, and performing comparison and analysis on an optimization result.

Description

technical field [0001] The invention relates to the field of mechanical transmission, in particular to the optimal matching of parameters of a dual-motor power system of a pure electric vehicle. Background technique [0002] In order to improve the energy utilization rate of electric vehicles during driving, dual-motor power system solutions have been gradually developed, but the immaturity of battery technology restricts the driving range of electric vehicles. [0003] Some scholars have conducted research on optimizing the parameters of a certain component in the powertrain system with the goal of reducing the energy consumption of electric vehicles. Hu Minghui et al. took the power requirements of the whole vehicle as the constraint and the economy as the goal, and matched the parameters of the electric vehicle motor and transmission system in combination with standard working conditions; Wang Xueming matched the parameters of the pure electric vehicle transmission system...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/17G06F2119/06Y02T10/40
Inventor 李聪波胡捷李月赵来杰陈文倩单亚帅杨青山
Owner CHONGQING UNIV
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