三相无轴承异步电机的磁场定向控制

为实现三相无轴承异步电机的高性能悬浮和驱动控制,研究了4极转矩系统和2极磁悬浮系统的磁场定向控制问题.首先对转矩系统的气隙磁场定向和转子磁场定向控制进行了对比分析,然后分析了磁悬浮系统的磁场定向控制策略和非定极转子的感应补偿问题；最后,根据三相无轴承异步电机的运行控制特点,转矩系统采用了转子磁场定向、悬浮系统采用了气隙磁场定向和感应补偿的组合控制策略,对三相无轴承异步电机的控制系统进行了仿真和实验分析.结果表明:在额定转速范围内,可实现可靠的悬浮控制和良好的解耦控制性能.所采用的磁场定向控制策略是可行的.

Flux orientation control of three-phase bearingless induction motor

To realize the high performance magnetic suspension and drive control of three-phase bearingless induction motor,the problems of magnetic field orientation strategies for four-pole torque system and two-pole magnetic suspension system were studied in detail.Firstly,analyses and contrasts between air gap flux orientation and rotor flux orientation strategies of torque system were made.Then,the flux orientation strategy of magnetic suspension system was analyzed,and the induction compensation method for none pole-specific rotor circuits of magnetic suspension system was given.At the end,according to the operation characteristics of three-phase bearingless induction motor,rotor flux orientation strategy for torque system,air gap flux orientation strategy and induction compensation for magnetic suspension system were adopted,and simulation and experimental studies on the decouple control system of three-phase bearingless induction motor were made.Simulation and experimental results show that stable and reliable magnetic suspension control and higher decoupling performances can be achieved.The presented flux orientation strategies are feasible.