基于逆变器开关状态的无轴承异步电机悬浮系统独立控制

无轴承异步电机悬浮系统的独立控制是实现其高速运转的有效工作方式。无轴承异步电机实现悬浮工作客观要求准确控制转矩绕组气隙磁场信息，因此对转矩绕组气隙磁链的幅值和相位的辨识是实现独立控制的关键。本文提出了基于逆变器开关状态的转矩绕组气隙磁链幅值和相位的辨识方法，并应用这种方法实现了悬浮子系统的独立控制。文中对无轴承电机径向悬浮力控制、基于逆变器开关状态的转矩绕组气隙磁辨识进行了分析，实验结果表明此系统较好地满足了径向悬浮的稳、动态性能要求，验证了分析的正确性，系统在实现悬浮工作的前提下保持了电机旋转控制策略的灵活性。

Levitation System Independent Control of Bearingless Induction Motors Based on Inverter Switching States

The independent control of suspension system is an effec tive way of high speed operation for bearingless induction motors. Because the i nformation of the air gap field is necessary to levitation ope-ration of the be aringless motor, identifying the magnitude and phase of air gap flux of motor to rque winding is the key to independent control. This paper presents a way for id entifying the magnitude and phase of air gap flux based on the inverter switchin g states and the independent control of levitation subsystem is achieved. The pr inciples of the radial suspended force control and the way to identify the air g ap flux based on the inverter switching states are introduced. Experiment shows that the methed has a good levitation performance. The system keeps the control project of the motor flexible realizing the le-vitation operation of the beari ngless motor.