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Integrated optimization algorithm for dual-motor coupling driving system of electric bus

A coupling drive and system integration technology, applied in the fields of electric power plant, design optimization/simulation, constraint-based CAD, etc., can solve problems such as access, low system power requirements, and failure to consider the influence of control strategy efficiency

Active Publication Date: 2021-08-31
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0003] The current common parameter matching methods include: matching the motor power and gear transmission ratio according to the vehicle dynamic requirements, and designing the coupling device from the matched parameter value range. This method is the simplest, but does not consider the system parameters. The impact of matching on the efficiency of the coupling device is not suitable for electric buses, which have low requirements on system power and higher requirements on system economy; based on energy management, optimization algorithms are used to match and optimize system parameters. Although this optimization method considers the influence of the coupling device system parameters on the efficiency of the drive system, it does not take into account the influence of the control strategy on the efficiency, which will lead to a large discrepancy between the experimental results and the actual results

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  • Integrated optimization algorithm for dual-motor coupling driving system of electric bus
  • Integrated optimization algorithm for dual-motor coupling driving system of electric bus
  • Integrated optimization algorithm for dual-motor coupling driving system of electric bus

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[0061] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are 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.

[0062] The integrated optimization algorithm for the dual-motor coupling drive system provided by the present invention, such as figure 1 As shown, it specifically includes the following steps:

[0063] Step 1. Select the system parameters to be optimized in the drive system as the particle coordinates, including the respective rated power of the two motors and the transmission ratio of the transmission gear, and set the corresponding value range to complete the initialization of the particle swarm algorithm; ...

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Abstract

The invention provides an integrated optimization algorithm for a dual-motor coupling driving system of an electric bus. An upper layer algorithm and a lower layer algorithm are respectively constructed by using a particle swarm optimization algorithm and a dynamic programming algorithm. According to the particle swarm optimization, particle coordinates represent to-be-optimized system parameters, the dynamic programming algorithm is used as a control strategy optimization algorithm under each particle, system power loss is used as a target function to optimize a control strategy of the coupling driving system, and it is guaranteed that each particle operates with the optimal control strategy. The obtained particles can reach the minimum power loss, weighted summation is carried out on the power loss and the power level to serve as an objective function of the particle swarm algorithm, and the particle coordinate corresponding to the minimum value of the objective function is sought by the particle swarm algorithm to serve as the optimal system parameter.

Description

technical field [0001] The invention belongs to the technical field of parameter matching of a dual-motor coupling drive system, and in particular relates to the integrated optimization of system parameters and control strategies of a dual-motor coupling drive system. Background technique [0002] Dual-motor coupling drive system is an emerging drive system mainly for large-scale load or passenger electric vehicles with heavy load and high output power requirements. Its main advantage is that it can improve the The load rate of the motor in the entire operating condition, thereby improving the drive efficiency. The dual-motor coupling drive system has a variety of topological structures. Parameters such as motor power and transmission gear ratio play an important role in different topological structures. Whether the topology and system parameters are selected properly will greatly affect the efficiency of the coupling device. play. [0003] The current common parameter mat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F30/25G06N3/00B60K1/02G06F111/04G06F119/06G06F119/14
CPCG06F30/15G06F30/25G06N3/006B60K1/02G06F2111/04G06F2119/06G06F2119/14
Inventor 张硕宿玉康张承宁
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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