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Hangzhou Weigao Transmission Machinery Co., Ltd. What are the primary reasons for the common faults of the speed-regulating motor regulation system? The large body caused by reasons other than the speed-regulating motor itself can be summarized as 1. The hydraulic factor causes the speed pulsation of the turbine due to the pressure pulsation or vibration of the water flow in the water diversion system. However, for a process purpose, it can be achieved through an excessively divergent process method, and within the scope of a unified process method, it is possible to draw up various different process plans. 4 Vector frequency conversion speed control ac vector inverter through complex calculation and transformation to make the AC inverter in accordance with the control method of the DC motor to control the AC motor so as to achieve accurate speed control, torque control, improve output torque and other features.