适用于无轴承开关磁阻电机的功率变换器设计

 无轴承开关磁阻电机不仅具有开关磁阻电机的优点，而且拓宽了无轴承技术的应用范围。而功率变换器是无轴承开关磁阻电机的重要组成部分，其向电机绕组提供电流，以产生所需转矩和悬浮力，对电机旋转和悬浮性能有重要影响。根据无轴承开关磁阻电机电磁转矩和悬浮力控制原理，详细分析了其对功率变换器的要求，提出了主绕组功率变换器和悬浮绕组功率变换器的设计原则，并分析了其各种工作模式和数学模型。最后通过对实验样机的调试，给出了实验结果，实现了无轴承开关磁阻电机的稳定悬浮。

Design of Power Converters Applied to Bearingless Switched Reluctance Motors

Bearingless switched reluctance motors, which have characteristics of a switched reluctance motor, broaden in the applications of the bearingless technology. The converter is one of the important components in bearingless switched reluctance motors. They provide motor’s windings with the needed currents to satisfy the requirements of the torque and levitated forces. Therefore they mostly influence the rotation and levitation of bearingless motor. In view of the control characteristics of electromagnetic torque and radial force, the requirements of the converter are analyzed. The designed principles of the converters of both main winding and levitated winding are presented. The mathematical model and all work modes of the converter are introduced. Test results of an experimental prototype show the good performance of the suspension.