Three phase asynchronous motor three-phase no-load current is greater than the normal value how to deal with?

Three phase asynchronous motor is by a motor and access 380V three-phase AC power supply (phase difference of 120 degrees) power supply, due to the three-phase asynchronous motor rotor and the stator rotating magnetic field in the same direction, different speed rotation, the presence of slip, so called three-phase asynchronous motor.

The reason of three phase asynchronous motor three phase load current is more than normal:

The less the number of turns of the coil 1 when rewinding;

2 star connection method for triangle connection;

3 power supply voltage is too high;

4 motor assembly (such as the rotor installed anti -, stator core is not aligned, end cover screws fixed asymmetry, so that the end of cover deflection or loosening, etc.);

5 air gap is not uniform or increase;

6 stitches when burning core, reducing the magnetic properties;

7 power grid frequency reduction or 60Hz motor used in 50Hz power supply.

Fault handling method:

1 rewinding coil, increasing the number of turns;

2 correct wiring;

3 measure the supply voltage, and try to reduce the voltage;

4 check the assembly quality and eliminate the failure;

5 adjust the air gap, so that the uniform, a large air gap can adjust the number of coils;

6 core repair, or increase the number of turns of the coil winding;

7 check the quality of the power supply, and the motor nameplate consistent. .