无轴承电机悬浮控制系统的设计

Design on Suspension Control System of Bearingless Motor

无轴承电机是利用磁悬浮轴承和交流电机结构的相似性,将产生磁悬浮力的磁悬浮轴承绕组置入电机定子,省去了专门的磁悬浮轴承。通过对转矩绕组和悬浮力绕组的解耦控制,使电机的转子同时具有产生转矩和自悬浮的功能。无轴承电机能够实现高速、无摩擦等优良性能,是当前研究的热点之一,无轴承电机悬浮控制系统设计是该研究的关键。介绍了无轴承电机悬浮控制的基本原理,设计出了基于转矩绕组转子磁场定向的悬浮控制系统。

Bearingless motor combines structure characteristics of AC motor and magnetic suspension bearing, sets the magnetic suspension bearing windings which producing magnetic suspension force into the stator of motor, and omits the special magnetic suspension bearing. Through decoupling control of the torque windings and suspending force windings, the rotor of motor simultaneously have functions of producing torque and self-suspension. The bearingless motor can realize the fine function of high speed and does not have friction, it is one of research hot spot at present. The design of suspension control system is the key on research of bearingless motor. This paper introduces the basic principle for suspension control of bearingless motor. The suspension control system based on magnetic field direction detection of torque winding rotor is designed also.