摘要
针对五相感应电机在传统变极方法控制时,变极过程中电机转矩急剧下降和转速波动明显的问题,利用多相电机具有多个控制平面的特点,在五相感应电机转子磁场定向矢量控制的基础上,提出了一种基于转矩跟踪的电子变极方法。利用多相系统变换理论,把五相感应电机分解为1对极和2对极两个控制平面,在执行1对极和2对极间的变极调速中,采用转矩跟踪的方法控制,通过转子磁场定向矢量控制同时产生1对极和2对极的驱动电流,控制变极暂态过程中转矩的变化,实现转矩与转速均平稳的电子变极调速。通过实验验证了所提出的方法能够在不停电的情况下实现平滑的电子变极调速,减小了转矩的下降和转速的波动。
To resolve the torque drop and speed fluctuation problem of five-phase induction machine （ IM） during the process of electronic pole-change （ EPC） when adopting the traditional EPC control method, the electronic pole-changing methods of five-phase induction machine based on torque tracking was pro-posed. Different plane harmonic currents generated by the rotor field oriented vector control （ RFOVC） can make motor rotate smoothly without power off to realize EPC. The proposed method was verified by an EPC experiment of a 5-phase induction machine and the experimental results of EPC between 1-pair poles and 2-pair poles based on RFOVC were given. The experimental results of double planes vector control, current control based EPC and torque tracking control based EPC show that the method proposed is feasi-ble to achieve smooth pole-changing without power off by reducing torque and speed fluctuations.
出处
《电机与控制学报》
EI
CSCD
北大核心
2015年第1期1-7,共7页
Electric Machines and Control
基金
国家自然科学基金(51177150)
国家重点基础研究发展计划(973计划)(2013CB035604)
航空科学基金(2013ZB76004)
浙江省自然科学基金(LY14E070004)
关键词
多相电机
转矩跟踪
电子变极
矢量控制
转矩波动
multiphase induction machine
torque tracking control
electronic pole-changing
vector control
torque ripple
