摘要
研究了转子初始位置、通电时刻对自起动永磁电机动态起动性能的影响。以一台22kW永磁电机为例,通过理论分析和时步有限元计算揭示了起动冲击转矩、冲击电流与转子初始位置及通电时刻的关系。结果发现,当定子电流非周期分量产生的静止磁场对永磁体磁场产生增磁作用时,可能出现十几倍的起动冲击转矩和冲击电流。通过不同初始状态下的起动电流和转矩的实测分析,验证了该结论的正确性。
The effect of the initial rotor position and electrifying moment on starting performance of line-start permanent magnet （PM） motor was studied. The relationship,which was starting inrushing current and torque changed with initial rotor position and electrifying moment,was revealed through theoretical analysis and time-stepping finite element calculation. It was shown that the starting inrushing current and torque may be ten times than normal ones when the static magnetic field produced by the non-periodic component of stator current increases the magnetic field of the permanent magnet. The correctness of the above conclusion was verified by testing on a 22 kW PM motor.
出处
《电机与控制应用》
北大核心
2010年第8期10-13,共4页
Electric machines & control application
基金
国家科技支撑计划项目(2008BAF34B02)
关键词
自起动永磁电机
初始状态
冲击转矩
冲击电流
时步有限元
line-start permanent magnet motor
initial state
inrushing current
impact torque
timestepping finite element
