When the three-phase brake motor is started, because the rotation is stationary, the rotating magnetic field cuts the rotating magnetic field at a relative speed, so that the rotating magnetic field senses a high potential and flows a large current. The current creates magnetic energy that resists the stator's magnetic field. In order to keep the supply voltage compatible with the original magneto-current flow, the stator will also be increased, even up to the rated current4to7Times, the large current is called the starting current.
The influence of the starting current of the three-phase brake motor may cause the output voltage of the power supply device to fluctuate or trigger overcurrent protection, resulting in the failure to start normally.Three-phase brake motorAfter starting, as the motor speed increases, the stator current will quickly stabilize. It works within the rated current range, and chooses a larger power supply to avoid the shock of the starting current, which will cause waste.
An effective way to deal with the effects of starting currents is to use three phasesBrake motorSoft start, by slowly increasing the operating voltage of the motor to achieve the speed, and gradually reaching the expected set value, can significantly reduce the motor starting current to ensure that the test is carried out normally.
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