SVPWM过调制中控制角算法的分析与应用  

Control angle algorithm of SVPWM over modulation analysis and application

作　　者：王旭东[1] 张思艳[1] 余腾伟[1] 

机构地区：[1]哈尔滨理工大学电气与电子工程学院,黑龙江哈尔滨150080

出　　处：《电机与控制学报》2010年第12期63-67,74,共6页Electric Machines and Control

基　　金：黑龙江省教育厅科技研究项目(11551075)

摘　　要：针对高速弱磁下低压电动机的高功率输出时由于电源内阻的影响,母线电压会随着输出功率的上升而下降的问题,提出了一种基于面积等效原理的空间矢量脉宽过调制中控制角的算法,算法简单、准确,占用内存小,程序执行时间短,移植性强,能够完成调制比从0至1的线性调制到过调制中六阶梯波工作状态的平滑过渡,并具有良好的线性增益。仿真及实验结果表明,该算法控制下的低压电动机运行稳定,提高了直流母线电压利用率,此应用是扩展电机转速范围、增加最大输出转矩的一种有效方法。For low voltage motor applications,due to the impact of power supply resistance,bus voltage will decline with the rise of power output which is bad for high-power output under the high-speed.A new algorithm about the control angle of the space vector PWM over modulation based on the principle of area equivalence was proposed.The advantages were easy-to-compute,accurate,easy-to-programmed,with short program execution time,and small memory,strong transplantation.Modulation ratio from 0 to 1 smooth transition corresponding linear modulation to the six-step stage in over-modulation and good linear gain were achieved.The simulation and experimental results show that the control angle algorithm can make the low-voltage motor work stable and improve the DC bus voltage utilization.It can be concluded that this application is an effective method to extend the scope of the motor speed and the maximum output torque.

关 键 词：过调制 控制角 电压利用率 

分 类 号：TM921[电气工程—电力电子与电力传动]