Three-phase asynchronous motors can take measures to reduce the starting current of the motor?


   To start using the drive, the drive can be selected by the acceleration mode, such as a straight line, s curve.

   If asynchronous motors at rated voltage direct start, starting current will reach 6-8 times the rated current, the larger the motor capacity does not allow such a situation, you need to install the soft-start measures.

   The so-called soft start the motor, is through a variety of methods to control the stator terminal voltage is gradually increased from zero to the rated value, so that the starting current controlled so as to avoid the impact of electromagnetic torque during startup. Using impact on the grid voltage fluctuation of the motor soft start to avoid the total pressure starts to reduce the high-frequency power oscillations and resonance, while reducing motor insulation life and the hazards and risks to stationary machinery.