电工电气杂志社

基于改进模型预测的BLDCM转矩脉动抑制研究

来源：电工电气发布时间：2024-11-04 14:04 浏览次数：219

基于改进模型预测的BLDCM转矩脉动抑制研究

王雷，崔玉鑫，王育安，史国航

(河北科技大学电气工程学院，河北石家庄 050018)

摘要：由于电机结构设计和控制方法等因素，无刷直流电机(BLDCM)在运行过程中会产生转矩脉动，引起电机在全速运行时出现抖动。分析了换相转矩脉动产生的原因，结合占空比预测方法提出一种改进的模型预测控制方法，使用占空比预测替代传统的电流环 PI 控制器，并将预测的占空比用于 PWM_ON_PWM 调制波的生成，避免了传统 PI 控制复杂的参数设置，有效减少了部分转矩波动。推导了在换相过程中插入单管调制和三管调制对非换相相电流的抑制作用，并设计了新型代价函数，实现了最优开关状态插入的模型预测控制。在电流预测过程中，提出一种动态反馈修正方法，消除了因电机运行参数变化带来的预测值偏移问题。通过仿真实验验证了所提控制策略在不同转速下对减小换相转矩脉动的有效性，并显著提高了无刷直流电机控制系统的控制性能。

关键词： 无刷直流电机；转矩脉动；模型预测；动态修正；占空比；代价函数

中图分类号：TM33 文献标识码：A 文章编号：1007-3175(2024)10-0008-06

Research on BLDCM Torque Ripple Suppression Based on

Improved Model Prediction

WANG Lei, CUI Yu-xin, WANG Yu-an, SHI Guo-hang

（School of Electrical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China）

Abstract: Due to factors such as the structural design of the motor and control methods, brushless direct current motors (BLDCM) generates torque ripple during operation, causing the motor to vibrate during full-speed operation. In this paper, the causes of commutation torque ripple are analyzed, and an improved model predictive control method is proposed in combination with the duty cycle prediction method, which replaces the traditional current loop PI controller with duty cycle prediction, and uses the predicted duty cycle for the generation of PWM_ON_PWM modulation waves, which avoids the complex parameter settings of the traditional PI control and effectively reduces part of the torque fluctuation. In the process of current prediction, a dynamic feedback correction method is proposed to eliminate the prediction value offset problem caused by changes in motor operating parameters. Finally, simulation experiments verified the effectiveness of the proposed control strategy in reducing commutation torque ripple at different speeds, and significantly improved the control performance of the brushless DC motor control system.

Key words: brushless direct current motor; torque ripple; model prediction; dynamic correction; duty cycle; cost function

参考文献

[1] 张琛. 直流无刷电动机原理及应用[M] .2 版. 北京：机械工业出版社，2004.

[2] PILLAY P, KRISHNAN R.Application Characteristics of Permanent Magnet Synchronous and Brushless DC Motors for Servo Drives[J].IEEE Transactions on Industry Applications，1991，27(5) ：986-996.

[3] PARK J H, LEE D H.Simple commutation torque ripple reduction using PWM with compensation voltage[J].IEEE Transactions on Industry Applications，2020，56(3) ：2654-2662.

[4] 李珍国，王江浩，高雪飞，等. 一种合成电流控制的无刷直流电机转矩脉动抑制系统[J]. 中国电机工程学报，2015，35(21) ：5592-5599.

[5] JIANG W, LIAO Y, WANG J, et al.Improved control of BLDCM considering commutation torque ripple andcommutation time in full speed range[J].IEEE Transactions on Power Electronics，2018，33(5) ：4249-4260.

[6] XIA C, XIAO Y, CHEN W, et al.Torque ripple reduction in brushless DC drives based on reference current optimization using integral variable structure control[J].IEEE Transactions on Industrial Electronics，2014，61(2) ：738-752.

[7] 戈小中. 晶圆清洗机无刷电机及其控制策略研究[D] .武汉：湖北工业大学，2010．

[8] 张雷，李航，宋晓娜. 无刷直流电机直接转矩控制系统的优化设计[J] . 电机与控制学报，2019，23(10) ：110-119．

[9] XIA C, WANG Y, SHI T.Implementation of Finite-State Model Predictive Control for Commutation Torque Ripple Minimization of Permanent-Magnet Brushless DC Motor[J].IEEE Transactions on Industrial Electronics，2013，60(3) ：896-905.

[10] KIM G H, KANG S J, WON J S.Analysis of the commutation torque ripple effect for BLDCM fed by HCRPWM-VSI(brushless DC motors)[C]//7th Annual Applied Power Electronics Conference and Exposition，1992.

[11] 杨进，杨向宇. 一种减小无刷直流电机纹波转矩的新方法[J]. 微电机，2005，38(1) ：9-11.

[12] 林平，韦鲲，张仲超. 新型无刷直流电机换相转矩脉动的抑制控制方法[J] . 中国电机工程学报，2006，26(3) ：153-158.

[13] WANG Dafang, BU Deming, ZHU Cheng, et al. A Modulation Method to Decrease Commutation Torque Ripple of Brushless DC Motors[J].Transactions of China Electrotechnical Society，2014，29(5) ：160-166.

[14] 韦鲲，胡长生，张仲超. 一种新的消除无刷直流电机非导通相续流的 PWM 调制方式[J]. 中国电机工程学报，2005，25(7) ：104-108.

返回索引列表

Article retrieval

文章检索

基于改进模型预测的BLDCM转矩脉动抑制研究