基于双DSP的异步电机控制系统设计
2021-04-27曹海红
曹海红



摘 要:在电力电子技术不断发展的过程中,电机控制也逐渐朝着更优化、高效的方向发展。为了解决传统变频器中利用二极管不控整流中具有较大的网侧电流谐波含量的问题,设计基于双DSP的嵌入式异步电机控制系统。通过双DSP控制系统辨识电机参数,实现电机矢量控制,对比单DSP控制系统,能够提高计算速度与采样精度,并且提高系统外部拓展的性能。通过试验表示,在闭环调速过程中的效果良好。双DSP系统在电机无速度传感器矢量控制过程中,能够提高速度估算的效率与精准性,对于电机控制较为精准。
关键词:DSP技术;嵌入式;异步电机控制
中图分类号:TM359.9 文献标识码:A 文章编号:1001-5922(2021)08-0143-04
Design of Asynchronous Motor Control System
Based on Dual DSP
Cao Haihong
(School of Automation Engineering, Xi an Aeronautical Polytechnic Institute, Xi an 710089, China)
Abstract:In the process of continuous development of power electronics technology, motor control is also gradually developing towards a more optimized and efficient direction. An embedded asynchronous motor control system based on double DSP is designed to solve the problem of large grid-side current harmonic content in the uncontrolled rectification using diodes in traditional frequency converters. The motor parameters are identified by the dual DSP control system, and the vector control is realized. By comparing the single DSP control system, the calculation speed and sampling accuracy can be improved, and the performance of the external expansion of the system can be improved. It is shown by the test that the effect is good in the closed loop speed regulation process. Double DSP system can improve the efficiency and accuracy of speed estimation during the motor speed sensorless vector control process, and is more accurate for motor control.
Key words:DSP technology; embedded; asynchronous motor control
异步电机为强耦合、多变量、非线性的系统,其控制策略发展包括开环控制、矢量控制、转速闭环滑差频率控制等。文章提出基于双DSP的嵌入式异步电机控制系统,通过TI公司TMS320VC33、TMS320LF2407构成。TMS320LF240x系列电机控制专用DSP集成丰富电机控制专用的外设与通讯功能,但是16位定点处理器核心速度在开发高性能电机控制过程中存在不足,定点CPU结构限制了C语言、浮点算法的使用,导致大量计算编程比较困难。但是TMS320C3x系列DSP为高速32位浮点DSP,集成外围硬件比较少,其运算速度与精度超过16位定点处理器,并且支持C语言编程。文章所提出雙DSP嵌入式异步电机控制平台,使电机控制结合专用DSP与浮点DSP,将其优势充分展现出来,实现复杂系统高性能控制算法,简化电力电子系统研发。
1 系统的构成……p>
