摘要
永磁容错型游标(FTPMV)电机结合了永磁游标电机高转矩密度和永磁容错电机高可靠性的优点,因此成为专家学者研究的热点之一。为了研究此类电机在低速区和高速区的运行性能,对比分析了两种五相电机的结构特性、磁场调制机理和电感特性,并推导了五相电机弱磁情况下的数学模型。其次,基于电压空间矢量脉宽调制(SVPWM)控制方法,建立电机驱动系统。在低速区,采用直轴电流为零的控制策略;在高速区,采用一种基于母线电压和反电动势差值判断弱磁时刻的方法重点研究了电机的弱磁特性。参数计算和仿真结果表明,电机工作在额定电流的情况下,相比传统FTPMV电机,新型FTPMV电机有更好的弱磁能力。最后,通过样机的实验数据验证了理论分析的正确性。
The fault-tolerant permanent magnet vernier（FTPMV） machine combines the advantages of high torque density of the permanent-magnet vernier machine and high reliability of the fault-tolerance permanent-magnet machine. Hence, it has become a hot research topic for experts and scholars. In order to study the operating performances of this kind of machine in low and high speed operation regions, the structure, modulation principle of magnetic fields and inductance characteristics of two five-phase machines are compared and analyzed in this paper. Additionally, the mathematical model of five-phase machines is deduced based on flux-weakening and the drive system is established according to the space vector pulse width modulation（SVPWM） control method. Based on the stage control strategy, in the low speed region, id = 0 control strategy is used. In the high speed region, a kind of flux-weakening control strategy is used and the flux-weakening characteristics of machines are studied importantly, in which the moment of flux-weakening is judged based on the difference between bus-bar voltage and back-EMFs. Moreover, by parameters calculation and simulations, it can be found that the new FTPMV machine possesses better flux-weakening capacity than the conventional FTPMV machine when they works on the condition of rated current. Finally, the theoretical analysis is verified by experimental results.
出处
《电工技术学报》
EI
CSCD
北大核心
2017年第19期52-61,共10页
Transactions of China Electrotechnical Society
基金
国家自然科学基金项目(51422702
51577084)
江苏省"333工程"科研项目(BRA2015302)
江苏省高校自然科学研究重大项目(15KJA470002)
江苏省优势学科资助
关键词
永磁同步电机
游标电机
容错电机
弱磁特性
Permanent magnet synchronous machine
vernier machine
fault-tolerant machine
flux-weakening performance
