十五相异步电机建模及稳态仿真研究

为研究变频供电多相异步电机的稳态性能,依据电机多回路理论,采用广义坐标变换矩阵,建立了正交坐标系下十五相(3组五相移12°)异步电机的数学模型。在分析归纳以三相和五相为单元的2类典型多相电机状态变量对称性的基础上,给出了十五相异步电机的稳态仿真算法。对方波变频供电五相和十五相(3组五相移12°)两台异步电机的定子电流、转子电流和电磁转矩进行了仿真计算和分析比较。仿真计算结果表明,方波供电时十五相电机稳态定子电流谐波含量高于五相电机,稳态转矩脉动和转子侧电流谐波含量低于五相电机。

Modeling and steady-state simulation for fifteen phases asynchronous motor

In order to research the steady state performance of multiphase asynchronous motor fed by variable frequency power supply,according to multi loop principles of electrical machine,the generalized coordinate transformation was adopted,and a mathematical model of fifteen phases (3 groups five phase moved 12 degrees) asynchronous motor in the orthogonal coordinate system was established.Based on analyzing and concluding the symmetry of state variables for two kinds of typical multi-phase electrical machine composed with three phases and five phases,the steady-state simulation algorithm for fifteen phases asynchronous motor was given.Simulation calculation and analysis comparison was made for the stator & rotor current and electromagnetic torque of a five phases and a fifteen phases (3 groups five phase moved 12 degrees) asynchronous motor fed by inverter,a comparison to a five phases and a fifteen phases asynchronous motor was made.The simulation results show that the steady-state stator harmonic current content of fifteen phases motor is higher than the five phases motor,while the steady-state rotor harmonic current content and the electromagnetic torque of fifteen phases motor is lower than the five phases motor powered by square wave.