摘要
针对无轴承永磁薄片电机因绕组或功率开关故障导致电机无法正常工作的问题,以六相单绕组无轴承永磁薄片电机为例,提出定子电流重构原则的缺相故障控制方法。该方法以电机的悬浮力和转矩数学模型为基础,结合功率最优约束条件,给出了更具通用性的定子电流缺相控制模型。通过对缺相后剩余定子电流及其产生的悬浮力脉动进行分析,得到可保证电机稳定运行的缺相形式,即任意一相绕组相邻两相和相对两相绕组故障可实现缺相控制,而对于相隔一个定子齿的两相绕组故障及缺相绕组个数大于2的故障形式无法实现缺相控制。最后,在一台原理样机上实现了任意一相和相对两相故障的缺相控制。
There always exists a problem towards bearingless slice motor that the faults of windings or power switches would lead to the motor＇s abnormal running. Aimed at solving the problem above, a lacking-phase fault control strategy was presented based on the stator-current reconfiguration principle and experimented on a six-phases single-winding bearingless slice motor. The method put forward a more general stator-current lacking-phase control model, which was based on the mathematical model of motor＇s levitation force and torque combined with the power-optimal constraints. Moreover, certain lacking-phase states under which motor＇s running could be assured steady were concluded through the analysis about remains lacking-phase currents and its corresponding levitation force＇s Pulse. The lacking-phase control was implemented under random one-phase, adjacent or opposed two-phases fault states and could not be implemented for apart two-phases or more then two-phases fault states. Finally, a single-winding bearingless slice prototype motor was applied to achieve the fault-tolerance control under the random one-phase and opposed two-phase fault states.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2010年第12期69-75,共7页
Proceedings of the CSEE
基金
国家自然科学基金项目(50977043)~~
关键词
无轴承
薄片电机
单绕组
缺相控制
悬浮力脉动
bearingless
slice motor
single-winding
fault control
levitation forces＇s pulse
