CAJ | 학술논문

提出一种混合永磁可变磁通记忆电机，研究了永磁体不同磁化状态下的静态特性。基于有限元法，对施加不同去磁电流时的电机磁场分布进行了分析，并观察永磁体内的磁密变化，计算了不同永磁磁化状态下的气隙磁密、永磁磁链、反电动势及每极气隙磁通等电机主要参数。制作一台样机，并进行实验研究，实验结果与有限元计算结果吻合较好。研究表明，永磁体的充磁比去磁要困难，当磁化电流为2倍的定子额定电流时，能将磁体去磁90％，而仅能充磁到饱和时的30％：与基本结构记忆电机相比，该混合永磁记忆电机具有更高的气隙磁密。该类电机在宽调速驱动系统中具有应用前景。
제출일충혼합영자가변자통기억전궤，연구료영자체불동자화상태하적정태특성。기우유한원법，대시가불동거자전류시적전궤자장분포진행료분석，병관찰영자체내적자밀변화，계산료불동영자자화상태하적기극자밀、영자자련、반전동세급매겁기극자통등전궤주요삼수。제작일태양궤，병진행실험연구，실험결과여유한원계산결과문합교호。연구표명，영자체적충자비거자요곤난，당자화전류위2배적정자액정전류시，능장자체거자90％，이부능충자도포화시적30％：여기본결구기억전궤상비，해혼합영자기억전궤구유경고적기극자밀。해류전궤재관조속구동계통중구유응용전경。
A hybrid permanent magnet （PM） variable flux memory motor （VFMM） was presented and its static characteristics under different magnetizations were investigated numerically and experimentally. Using the finite element method （FEM）, the magnetic field distributions of the motor under different magnetization currents were analyzed, and the flux density in the PMs were particularly observed. The no-load air-gap flux density waveforms, phase flux-linkages, phase back electromotive force （EMF） and air-gap flux per pole were calculated based on the FEM analysis. A prototype was fabricated and some experiments were performed. Good agreement between calculated and measured results was achieved. It is shown that the PM remagnetization is more difficult than demagnetization, and about 2 times rated current of motor can demagnetize the PM to 90 percent, but only remagnetize the PM to 30 percent. Compared with the basic VFMM, the hybrid VFMM has more air gap fluxes and the power density will become larger. This kind of hybrid VFMM can be potentially used in the drive system with wide speed adjusting.