We get a representative waveform by magnetic flux linkage's vector transform, when one IGBT is in circumstances of short circuit or open circuit in voltage source inverting three-phase circuit. 当逆变电路中一个IGBT出现短路和断路故障时电机的电流参数的变化,尤其是电机矢量变换后磁链的变化。
By analysis and comparison of motor rotating speed and stator magnetic flux linkage diagram under direct self control at different rotor resistance, the conclusion is shown that the rotor resistance variation will exert no influence on the direct self control for ac asynchronous motor. 通过对不同转子电阻在直接转矩控制下得到的电机转速和定子磁链图形的分析比较,得出了转子电阻变化对交流异步电机直接转矩控制没有影响的结论。
According to the magnetic couplings of the double-rotor electric machine, its equivalent magnetic circuits is presented in this paper, its equations for voltage, flux linkage, electromagnetic torque and motions are presented also. 本文给出了具有磁场耦合的同心式双转子机电能量变换器的等效磁路,给出了线性磁路条件下的电磁方程和运动方程。
Based on the physical model of Permanent Magnet Synchronous Motor, the paper establishes the simulation model of direct torque control, and studies the effect of zero-voltage vector to the torque and magnetic flux linkage. 根据永磁同步电机的数学模型,建立了直接转矩控制仿真模型,并在此模型基础上研究了零矢量对转矩和磁链的影响。
The motor and PWM inverter are seemed as one controlled object, so that the motor can obtain a constant magnetic field similar to the ideal circle and at last, solving the problems of torque, current, flux linkage ripple and inconstant switching frequency. 把电动机和PWM逆变器看成一体,使电动机获得赋值恒定的近似理想的圆形磁场,解决其转矩、电流、磁链脉动大,开关频率不恒定的问题。