摘要
多相感应电机具有高效、低转矩脉动,能容错运行以及更易于实现低压大功率等优势,特别适合应用于电动汽车。针对驱动系统常出现的缺相故障,基于故障前后定子磁动势保持不变的原则研究了容错控制策略,并探讨了3次谐波注入后,1、3次谐波之间的磁场耦合及其对电机转矩等性能的影响。为解决滞环控制产生的转矩脉动和效率下降等问题,电流环采用了比例谐振控制方式,利用其谐振点附近的高增益,实现了相坐标系下的无静差控制。构建了一套低直流母线电压供电的五相感应电机控制系统,通过一相和两相绕组断开故障等实验,研究对比了不同控制策略下电机的性能,及各控制策略中谐波耦合的影响。
Muhiphase induction machine drives are suitable in the application of electric vehicle due to their advantages over conventional three phase drives： high power under low voltage, less torque pulsation, higher efficiency, fault tolerance operation, etc. Strategies for fauh-tolerant control of a 5-phase motor were analyzed, based on the principle of maintaining the same magnetic motive force （MMF） after the fault occurrence. And the interaction between 1^st and 3^rd MMF under fault-tolerance operation was investigated. Proportional resonant regulator was adopted to resolve the passive impact of torque ripple and low efficiency caused by hysteresis control, which can achieve zero steady-state error even in the stationary phase frame, because of its large gain at the target electrical frequency. A five-phase induction motor drive system with low DC link was constructed, and experimental results verify the analysis of the fault tolerance control strategies under open phases.
出处
《电机与控制学报》
EI
CSCD
北大核心
2014年第3期1-6,共6页
Electric Machines and Control
基金
国家重点基础研究发展计划项目(973计划项目)(2013CB035604)
浙江科技学院学科交叉项目(2011JC02Y)
关键词
多相电机
电动汽车
磁动势
容错
比例谐振
muhiphase induction motor
electric vehicles
magnetic motive force
fault tolerance
proportional resonant
