无轴承开关磁阻电机实验平台的设计与实现

将无轴承技术应用于开关磁阻电机中可充分发挥该电机的高速适应性,并拓宽其在微型和大功率领域中的应用。该文在已有数学模型基础上,针对其电磁转矩和悬浮力的控制特点,设计了以DSP-LF2407A为控制核心的数模混合控制实验平台。实验平台包括无轴承开关磁阻电机本体、DSP数字控制器、电流滞环控制器、PID调节单元、3套功率逆变器、传感器和相关辅助电路,并对其工作原理进行了分析。在此基础上设计了控制系统的软件,并给出了主要子程序的流程图。通过对整个实验平台硬软件的联合调试,实现了无轴承开关磁阻电机的稳定悬浮。

The Design and Realization of Experiment Platform of a Bearingless Switched Reluctance Motor

The bearingless technology has been applied to the switched reluctance motor, which could fully enhance its high-speed performance and broaden its applied fields of miniature and large power. The principles of radial force generation and mathematical model of the bearingless switched reluctance motor are analyzed briefly. In view of the control characteristics of electromagnetic torque and radial force, an experimental platform of digital and analog control system for real-time control is designed based on DSP(TMS320LF2407A). The experimental platform consists of a bearingless switched reluctance prototype motor, DSP digital controller, current hysteresis loop controller, PID controller, power inverter, sensors and correlative assistant circuit, whose principles of work are analyzed. Based on the platform, the system program is designed and program flow charts of most interrupt service routines are given. Test results of an experimental platform including hardware and software show the good performance of the suspension.