提出了一种磁通记忆式双凸极非稀土永磁电机(doubly salient permanent magnet motor with non-rare-earth flux memory,FM-DSPM),采用了可在线调节永磁体磁化强度和工作点的磁化绕组,为电机的可靠运行以及容错能力增添了新的自由度。...提出了一种磁通记忆式双凸极非稀土永磁电机(doubly salient permanent magnet motor with non-rare-earth flux memory,FM-DSPM),采用了可在线调节永磁体磁化强度和工作点的磁化绕组,为电机的可靠运行以及容错能力增添了新的自由度。针对该类电机最常见的单相断路故障,提出了电枢磁场重构容错控制策略,即通过改变电机的励磁磁动势与电枢磁动势,来实现单相故障下的容错运行。通过仿真研究对比分析了该控制策略中的两种方案:单一电枢磁场重构容错控制、增磁无刷直流(brushless DC,BLDC)容错控制。两种方案均可在单相故障时,实现磁场重构,进而获得近似相等的转矩和容错运行能力。最后通过实验研究,验证了所提容错控制方法的正确性和可靠性。展开更多
U. S. missile actuators employ REPM (rare earth permanent magnet) BLDCM (brushless D. C. motor). We are the first in China to propose square - wave REPM BLDCM for Chinese missile actuator.We found it necessary to desi...U. S. missile actuators employ REPM (rare earth permanent magnet) BLDCM (brushless D. C. motor). We are the first in China to propose square - wave REPM BLDCM for Chinese missile actuator.We found it necessary to desisn such square - wave motor with a method different from traditional ones. Traditionai methods for designing permanent - msanet BLDCM are based on sinusoidal gap magnetic density distribution and sinusoidal winding back EMF(electromotive force). They are not suitable for REPM square - wave motor which has square gap magnetic density distribution and trapezoidal winding back EMF. Table 1 gives for comparison the design formulas of inductive potential, armature current, electromagnetic torque, and no - load speed of REPM square - wave motor and of traditional permanent magnet BLDCM respectively. It is important to note that the elechromagnetic torque coefficient of REPM square - wave motor is about 5% higher than that of traditional BLDCM.We developed a prototroe of REPM square - wave motor. Its specifiations are: rated power = 30W, rated D. C. voltage = 48V, rated speed = 1000r/min. Its operation pattern is star - form three - phase six - state.Fig.1a shows test curves relating current I and efficiency n to output torque T respectively. Fig. 1b shows test curves relating input power P1 tal output power P2 to T respectively. The desisn error of rated torque is within 1. 7%. The prototype also achieves 17 500r/s2 starting acceleration and 0. 154 W/g power density and thus actuator performance is improved. All these indicate that our proposed design method is valid.展开更多
文摘提出了一种磁通记忆式双凸极非稀土永磁电机(doubly salient permanent magnet motor with non-rare-earth flux memory,FM-DSPM),采用了可在线调节永磁体磁化强度和工作点的磁化绕组,为电机的可靠运行以及容错能力增添了新的自由度。针对该类电机最常见的单相断路故障,提出了电枢磁场重构容错控制策略,即通过改变电机的励磁磁动势与电枢磁动势,来实现单相故障下的容错运行。通过仿真研究对比分析了该控制策略中的两种方案:单一电枢磁场重构容错控制、增磁无刷直流(brushless DC,BLDC)容错控制。两种方案均可在单相故障时,实现磁场重构,进而获得近似相等的转矩和容错运行能力。最后通过实验研究,验证了所提容错控制方法的正确性和可靠性。
文摘U. S. missile actuators employ REPM (rare earth permanent magnet) BLDCM (brushless D. C. motor). We are the first in China to propose square - wave REPM BLDCM for Chinese missile actuator.We found it necessary to desisn such square - wave motor with a method different from traditional ones. Traditionai methods for designing permanent - msanet BLDCM are based on sinusoidal gap magnetic density distribution and sinusoidal winding back EMF(electromotive force). They are not suitable for REPM square - wave motor which has square gap magnetic density distribution and trapezoidal winding back EMF. Table 1 gives for comparison the design formulas of inductive potential, armature current, electromagnetic torque, and no - load speed of REPM square - wave motor and of traditional permanent magnet BLDCM respectively. It is important to note that the elechromagnetic torque coefficient of REPM square - wave motor is about 5% higher than that of traditional BLDCM.We developed a prototroe of REPM square - wave motor. Its specifiations are: rated power = 30W, rated D. C. voltage = 48V, rated speed = 1000r/min. Its operation pattern is star - form three - phase six - state.Fig.1a shows test curves relating current I and efficiency n to output torque T respectively. Fig. 1b shows test curves relating input power P1 tal output power P2 to T respectively. The desisn error of rated torque is within 1. 7%. The prototype also achieves 17 500r/s2 starting acceleration and 0. 154 W/g power density and thus actuator performance is improved. All these indicate that our proposed design method is valid.
