电动车辆转速闭环转差频率调速控制系统的实现  

Design of Closed-loop Slip Frequency Speed Control System for Electric Vehicle

作　　者：石停停[1] 叶桦[1] 冒建亮[1] 

机构地区：[1]东南大学自动化学院,江苏南京210096

出　　处：《电气传动》2015年第10期3-6,共4页Electric Drive

摘　　要：针对转速开环变压变频(VVVF)调速系统的调速范围有限、精度受负载影响的问题,对电动车辆采用了转速闭环转差频率调速控制方法。结合空间矢量脉宽调制(SVPWM)技术,在开环调速的基础之上增加测速环节,并与给定转速相比较,输出转差频率对应的输出值,经过比例积分(PI)控制调节,输出转速,最终控制电机的转速。利用Simulink进行仿真分析,在干扰信号作用下转速迅速调节并最终保持不变,由此可知该闭环控制系统具有较好的抗扰动的性能,进而在实际电动车辆控制器DSP中进行了实现与验证。实验结果表明,转速闭环转差频率调速控制具有较高的转速精度和稳定性,可在干扰信号下实现较为精确的变频调速。To solve the problem of the limited speed range for the open-loop speed variable voltage variable frequency（VVVF） speed control system, and the impact of the load for the accuracy, the speed of the closed-loop slip frequency speed control was put forward for the frequency control system for electric vehicle. Combining with the space vector pulse width modulation（SVPWM） technology, an speed link was used to compare with a given speed, based t^n the open- loop speed control. Then the output value of the difference frequency was given, through a proportion integration （PI） regulator, the output speed was given too, and ultimately we could control the motor speed. The algorithm was simulated by Simuink, it was found that the speed adjusted quickly when the interference signal was applied and finally unchanged , which proved that the closed-loop control system has better performance against disturbance. Then it was carried out in practical electric vehicle DSP controller. The experimental results show that the speed of the closed-loop slip frequency speed control has high speed accuracy and stability, enabling more precise frequency control with interference signal.

关 键 词：变压变频 空间矢量脉宽调制 转差频率控制 SIMULINK 数字信号处理器 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]