三相无轴承异步电机的解耦控制系统

Decoupling control system of three-phase bearingless induction motor

为适应无轴承运行控制技术走向高速大功率领域的需要,对三相无轴承异步电机的控制模型、策略和系统进行研究和设计。经理论解析推导出激磁电感模型、基于转矩系统气隙磁链的可控磁悬浮力模型和不稳定单边磁拉力解析式,给出单边磁拉力前馈补偿方法,详细介绍四极转矩控制系统和二极磁悬浮控制系统的结构和控制原理;针对样机进行磁悬浮解耦控制系统的仿真分析和实验研究。仿真和实验结果表明,在加速起动过程和稳态运行状态中,都能实现可靠的悬浮运行。所给出的三相无轴承异步电机解耦控制模型、策略和系统是实用可行的。

To satisfy the need of walking up to super-speed and high power kingdom of bearingless drive technology,the control model and control strategy of three-phase bearingless induction motor were researched,and the decoupling control system was designed.By theory parsing,excited inductance model,controllable magnetic suspension force model of three-phase bearingless induction motor based air-gap flux of torque system were derived.The unstable unilateral magnetic pull model and its compensation method were presented,the configuration and control principles of four-pole torque control system and two-pole magnetic suspension decouple control system were introduced in detail.At the end,aiming at the bearingless induction prototype motor,simulation and experiment were made.Simulation and experiment results indicate that not only in acceleration,but also in steady operation,reliable suspension control has been achieved.Feasibility and practicability of designed decoupling control system of three-phase bearingless induction motor are validated.