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Switched reluctance motor torque control system based on improved PID control

A switched reluctance motor, torque control technology, applied in general control systems, control/regulation systems, adaptive control, etc., can solve the problems of reducing torque ripple and large torque ripple of switched reluctance motors

Active Publication Date: 2019-02-15
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to design a switched reluctance motor torque control system with improved PID control for the problem of large torque ripple in the low-speed running state of the switched reluctance motor. On the basis of the direct instantaneous torque control system, according to the single The characteristics of neuron PID and switched reluctance motor, using differential first to replace the original differential, that is, differential first single neuron PID speed controller; and further introducing fuzzy control to adjust the output gain of differential first single neuron PID, that is, fuzzy — Differential first neuron PID speed controller, this system has better control performance, effectively reduces the torque ripple of the switched reluctance motor, the torque ripple rate is less than 2%, and the system dynamic performance is good

Method used

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  • Switched reluctance motor torque control system based on improved PID control
  • Switched reluctance motor torque control system based on improved PID control
  • Switched reluctance motor torque control system based on improved PID control

Examples

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Embodiment 1

[0049] The microprocessor of embodiment 1 of the switched reluctance motor control system with improved PID control is equipped with a program memory and a data memory, and the program memory contains a speed and torque data acquisition module, an analog-to-digital conversion module, a speed controller, and a torque distribution module , Torque hysteresis controller, power converter and the rotor speed sensor and torque sensor installed on the switched reluctance motor, the output signal lines of each sensor are connected to the speed controller through the analog-to-digital conversion module, and the speed controller according to the given Speed ​​ω * and the actual speed ω to get the reference torque T ref , the reference torque T ref with measured torque T e The difference is taken as the total torque deviation ΔT ref Connect to the torque distribution module, obtain the torque deviation of each phase of the switched reluctance motor through the torque distribution funct...

Embodiment 2

[0077] The overall block diagram of the system in this example is as follows figure 1 As shown, the speed controller in this example is a fuzzy-differential prior single-neuron PID speed controller.

[0078] like Figure 4 As shown, this example introduces the classic fuzzy control module and the integral calculation module in parallel to form the integral fuzzy control module, and its output is used to dynamically adjust the output gain KK of the differential-first single-neuron PID speed controller. The classical fuzzy control module and the differential-first single-neuron The unit PID together constitutes the fuzzy-differential preceding single neuron PID speed controller.

[0079] The classic fuzzy control module in the integral fuzzy control module takes the speed deviation e(k) and the speed deviation increment Δe(k)=e(k)-e(k-1) as input, and its output is U PD . The integral calculator performs an integral calculation on the deviation e(k), and its output is x 2 (k...

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Abstract

The invention relates to a switched reluctance motor torque control system based on improved PID control. Based on a direct instantaneous torque control system, a differential calculation module of aforward channel in a single neuron PID speed controller is moved to a feedback channel of speed to constitute a differential advanced single neuron PID speed controller. Furthermore, a classical fuzzycontrol module and an integral calculation module are introduced to constitute an integral fuzzy control module through parallel connection, and the output gain of differential advanced single neuronPID is adjusted in real time to constitute a fuzzy-differential advanced single neuron PID controller. The control performance of the system is good. The torque ripple of switched reluctance motors is reduced, and the torque ripple rate is less than 2%. The dynamic performance of the system is good.

Description

technical field [0001] The invention relates to the control field of electric vehicle motors, in particular to an improved PID controlled switched reluctance motor torque control system. Background technique [0002] Switched Reluctance Motor (Switched Reluctance Motor), referred to as SRM, has the advantages of wide speed range, high efficiency, firm structure and low cost, and has become one of the first choices for new energy vehicle drive systems. However, the double-saliency structure of SRM and the switching power supply method cause large torque ripple, which limits the application and development of SRM in new energy vehicles. [0003] The commonly used SRM direct instantaneous torque control system is based on the fact that the SRM speed deviation is proportional to the torque variation, and the purpose of reducing torque ripple is achieved through speed control. The block diagram of the SRM direct instantaneous torque control system is as follows: figure 1 shown....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/041G05B13/042
Inventor 党选举经本钦彭慧敏姜辉伍锡如张向文李晓李珊唐士杰刘帆
Owner GUILIN UNIV OF ELECTRONIC TECH
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