磁悬浮轴承五相六桥臂开关功放的单周期控制算法改进

Improved One-Cycle Control Algorithm in Five-Phase Six-Leg Switching Power Amplifiers for Magnetic Suspension Bearing

将单周期控制算法应用于磁悬浮轴承五相六桥臂开关功放系统中,具有易于实现和智能响应快的突出优点。本文考虑磁悬浮轴承中线圈电阻压降的影响,对单周期控制算法进行改进,推导出改进后算法的数学模型。将改进后的算法与改进前的算法进行比较。仿真与实验的结果表明,改进后的算法能有效降低输出电流的纹波,实现对给定电流的良好跟踪,提高了控制精度,验证了该方法的有效性和优越性。

For the advantages of easy realization and rapidly intelligent response,the one-cycle control was applied in five-phase six-leg switching power amplifier for magnetic bearing.This paper improves the one-cycle control considering resistance voltage drop and derives its mathematical models.The improved algorithm is compared with the former one.The simulation and experimental results show that the improved algorithm can effectively reduce the output current ripple,achieve good tracking of the given current,improve the control accuracy,and verify the effectiveness and superiority of the method.