Metadata
Author: ParaCrawl Corpus
Data
English[en]
When the drag system of large inertia, the motor speed drop will keep pace with synchronous speed of the decline, the actual speed of the motor is higher than the synchronous speed, the motor rotor winding cutting the direction of the rotating magnetic field lines and constant speed motor run time on the contrary, the direction of the induced electromotive force and current of the rotor winding are also on the contrary, the electromagnetic torque and motor rotate in opposite directions, there will be a negative torque motor, this motor for generator, actual regenerative braking system, will drag the kinetic energy of the system back to the inverter dc bus, make dc bus voltage rising, even near the point of risk (frequency converter damage, etc.).
Chinese[zh]
当拖动系统的惯性较大,电机的转速的下降将跟不上电机 同步转速 的下降,即电机的实际速度比其同步速度高,此时 电机转子 绕组 切割旋转磁场磁力线的方向和电机恒速运行时正好相反, 转子绕组 的 感应电动 势 和电流的方向也都相反,所产生的 电磁转矩 也就和电机旋转方向相反, 电动机 将出现负转矩,此时的电动机实际为发电机,系统处于 再生制动 状态,将拖动系统的动能回馈到 变频器 直流母线 上,使直流母线电压不断上升,甚至达到危险的地步(变频器损坏等 ) 。 用途: