main flux meaning in English

主磁通

The observer makes use of motor parameters to estimate speed , but these parameters ( stator and rotor resistance , magnetizing inductance ) will vary because of the change of environmental temperature , iron loss and main flux saturation . so parameter variation will lead to the error of estimation , the purpose of this paper is to study the influence and the compensation of parameter variation
因为观测器在估计转速时利用的是电机的额定参数，而电机的参数（定子电阻、转子电阻、励磁电感）由于环境温度的变化、铁心损耗和主磁饱和的影响将发生变化，所以必然有估计误差产生。