Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Fuzzy Neural Network Control System for Permanent Magnet Synchronous Motor Used in Electric Vehicles

A technology of fuzzy neural network and permanent magnet synchronous motor, which is applied in motor generator control, motor control, electronic commutation motor control, etc. It can solve the problems of restricting nonlinear mapping ability, unsatisfactory learning speed and accuracy, and high cost.

Active Publication Date: 2019-03-01
XI AN JIAOTONG UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the parameters of the traditional Sigmoidal activation function of the BP network are fixed, and its mapping range, slope and position are immutable.
There is an irreconcilable contradiction between the learning ability of the traditional BP neural network and the complexity of the network, which restricts its nonlinear mapping ability, and the learning speed and accuracy are not ideal
Therefore, in the past ten years, researchers have done in-depth research on the shortcomings of the traditional BP neural network algorithm, and proposed many improved algorithms, such as the method of using momentum to speed up offline training, and the method of normalized weight update technology. , fast propagation algorithm, extended Kalman filter method, second-order optimization and optimal filter method, etc., although the network performance has been improved, but in the network training process, the activation function can only adjust the weight, and cannot automatically find the optimal function body
Therefore, the neural network is easy to fall into a local minimum point, the convergence speed is slow, and the generalization ability is weak.
[0004] The accurate acquisition of the rotor position and speed is the key to the stable and fast operation of the motor. At present, the sampling of rotor information in most motor control systems relies on mechanical position sensors such as resolvers and photoelectric encoders. The cost is high, and the occupied area and the inertia of the bearing Big

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Fuzzy Neural Network Control System for Permanent Magnet Synchronous Motor Used in Electric Vehicles
  • A Fuzzy Neural Network Control System for Permanent Magnet Synchronous Motor Used in Electric Vehicles
  • A Fuzzy Neural Network Control System for Permanent Magnet Synchronous Motor Used in Electric Vehicles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0098] The present invention will be further described in detail below in conjunction with the accompanying drawings. All similar structures and similar changes of the present invention should be included in the protection scope of the present invention.

[0099] Such as figure 1 Shown, a kind of permanent magnet synchronous motor fuzzy neural network control system of the present invention comprises fuzzy neural network control unit (specifically see figure 2 ), sensorless unit (see Figure 5 ), flux linkage and current calculation unit (see Figure 7 ), double current loop vector control unit (see Figure 4 ) and control object unit (see Figure 9 ).

[0100] The fuzzy neural network control unit includes a rule base module, a fuzzy module, a fuzzy reasoning module, a defuzzification module, a parameter learning algorithm module, a neural network module, and a speed controller module; the sensorless unit includes a phase-locked loop module and a new type of sliding mode...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention discloses a permanent magnet synchronous motor fuzzy neural network control system for an electric car, relates to an electrical transmission and control technology field, and provides a speed controller based on the fuzzy mathematics and neural network theory and a novel sliding-mode observer based on a tracking differentiator. The system comprises a fuzzy neural network control unit, a sensorless unit, a flux linkage and current calculation unit, a dual- current-loop vector control unit and a control object unit, can realize parameter autotuning of the permanent magnet synchronous motor and high-precision speed regulation in the condition without a mechanical speed sensor, can be applied on an electric car taking the permanent magnet synchronous motor as a power device, and is simple in structure and reliable in operation. Compared to a traditional PID speed controller and a sliding-mode observer, the permanent magnet synchronous motor fuzzy neural network control system for an electric car is higher in tracking precision, stronger in robustness and smaller in counter electromotive force buffeting; and when parameter perturbation of the controller or load disturbance, the permanent magnet synchronous motor fuzzy neural network control system for the electric car also can perform online regulation of parameters of the controller and accurately estimate the position and the speed of a motor rotor.

Description

technical field [0001] The invention belongs to the technical field of electric transmission and control, in particular to a fuzzy neural network control system for a permanent magnet synchronous motor used in an electric vehicle. Background technique [0002] The permanent magnet synchronous motor is a multi-variable, strongly coupled nonlinear dynamic system with simple structure, small size, light weight, low loss, low moment of inertia, high power density, high power factor, high efficiency and other physical characteristics, and it is easy to achieve high-speed operation , braking, forward and reverse switching, wide range of speed regulation, good dynamic response performance, and are widely used in the field of electric vehicles. During its operation, there is interference from external disturbances of sudden load changes; with the change of motor operating status, motor parameters will also change to a certain extent; there are also problems such as limited detection...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00
CPCH02P21/001H02P21/0014H02P2205/01
Inventor 刘凌杨航王悍枭张诚常雪剑胡全龙
Owner XI AN JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products