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Novel improved speed controller of permanent magnet synchronous motor control system of electric vehicle, and dynamic performance optimization method and system

A permanent magnet synchronous motor and speed controller technology, applied in motor generator control, motor control, AC motor control, etc., can solve the problem of limited control performance improvement, enhance achievability, reduce hardware computing burden, and respond to fast effect

Pending Publication Date: 2021-12-28
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some scholars have designed an integral fuzzy sliding mode speed controller and introduced it into the vector control system, which improves the tracking response speed of the motor speed, but the sliding mode control introduces many new parameters
Moreover, the current loop still adopts the PID control method, and the control performance improvement is very limited.

Method used

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  • Novel improved speed controller of permanent magnet synchronous motor control system of electric vehicle, and dynamic performance optimization method and system
  • Novel improved speed controller of permanent magnet synchronous motor control system of electric vehicle, and dynamic performance optimization method and system
  • Novel improved speed controller of permanent magnet synchronous motor control system of electric vehicle, and dynamic performance optimization method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] An improved speed controller for a new electric vehicle permanent magnet synchronous motor control system, characterized in that:

[0083] The speed controller in the motor control system uses an improved speed controller with a new type of exponential reaching law. The dynamic model of the electric vehicle and the dynamic mathematical model of the permanent magnet motor of the electric vehicle in the synchronous rotating coordinates are as follows:

[0084] When the pure electric vehicle is in a free state and starts on a slope, the control force F t It is necessary to overcome the effects of rolling resistance, slope resistance and air resistance, so the pure electric vehicle driving equation is shown in equation (1):

[0085]

[0086] In the formula, ∑F is the sum of the running resistance of the vehicle, λ is the conversion coefficient of the vehicle rotating mass; m is the mass of the vehicle, b is the longitudinal acceleration of the vehicle, T e is the motor ...

Embodiment 2

[0113] Such as Figure 1-2 , a new dynamic performance optimization method for electric vehicle permanent magnet synchronous motor control system. This method takes the electric vehicle permanent magnet synchronous Introduced into the speed loop of the control system to replace the traditional PID speed controller. Secondly, a new type of proportional resonant controller is used to replace the current controller in the traditional vector control system to reduce the number of coordinate rotations. Specifically, the dynamic performance optimization method of electric vehicle permanent magnet synchronous motor with new exponential reaching law and proportional resonance strategy is as follows:

[0114] Traditional PID control can meet the control requirements within a certain range, but when the internal parameters of the motor change or the system is disturbed by external nonlinear and time-varying characteristics, it is difficult for PID control to meet the needs of high-perf...

Embodiment 3

[0161] A dynamic performance optimization system for a new type of electric vehicle permanent magnet synchronous motor control system, including a new type of exponential reaching law improved speed controller and a new type of proportional resonance controller; the implementation of the two has been clearly stated in Embodiment 2 .

[0162] The following is an example

[0163] Example 1

[0164] Taking a 30kW electric vehicle permanent magnet motor as an example, its experimental parameters are shown in Table 1. Under complex operating conditions such as start-up, sudden increase and decrease of load, and sudden acceleration, the dynamic performance optimization method of electric vehicle permanent magnet motor using the new exponential reaching law and proportional resonance strategy proposed by the present invention is used to compare and analyze the speed response of the motor Such as Figures 3a-5b shown. It can be seen that the rotational speed response performance o...

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Abstract

The invention discloses a novel improved speed controller for a permanent magnet synchronous motor control system of an electric vehicle, and a dynamic performance optimization method and system. A novel exponential reaching law improved speed controller is firstly provided, and the novel exponential reaching law improved speed controller is introduced into a speed ring of the permanent magnet synchronous motor control system of the electric vehicle to replace a PID speed controller in a traditional scheme, so the response speed and the anti-disturbance performance of a control system are effectively improved. Compared with a traditional exponential reaching law controller, unknown new parameters are not added, the complexity of parameter setting is reduced, and the buffeting of the system is reduced while the far-end reaching speed is increased. Secondly, the novel proportional resonance controller is used for replacing a current controller in a traditional scheme, the number of times of coordinate rotation of the vehicle control system is reduced, and the robust performance of the vehicle control system is further improved.

Description

technical field [0001] The invention belongs to the field of dynamic performance analysis and optimization of an electric vehicle control system, and in particular relates to an improved speed controller, a dynamic performance optimization method and a system of a new electric vehicle permanent magnet synchronous motor control system. Background technique [0002] Advantages of electric vehicles compared to internal combustion engine vehicles include zero emissions, greater efficiency, and significant potential for reducing greenhouse gas emissions when combined with a low-carbon electricity sector. Electric motors are a central component of electric vehicle control systems, and their performance It directly determines the dynamic performance of the vehicle. Permanent magnet synchronous motors occupy a mainstream position in electric vehicle motors due to their small size, strong overload capacity, and high efficiency during acceleration and deceleration. A high-performance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14H02P21/18H02P21/20H02P21/22H02P25/022H02P27/12
CPCH02P21/0003H02P21/0007H02P21/14H02P21/18H02P21/20H02P21/22H02P25/022H02P27/12H02P2207/05
Inventor 张冬冬张汉权郭平辉李深旺乙加伟解浩男朱虹谕江美慧武新章
Owner GUANGXI UNIV
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