Cause and processing method of noise in operation of three phase asynchronous motor

The cause of the fault in the operation of three phase asynchronous motor is large:

1 rewinding changing pole number, slot mismatch;

2 rotor rub insulation paper or slot wedge;

3 bearing clearance is too small to wear, bearing failure;

4 fixed rotor iron core loose;

5 power supply voltage is too high or three phase unbalance;

6 stator winding fault;

7 winding faults (such as short circuit, etc.);

The 8 coil rewinding, no phase turns are not;

9 lack of grease;

10 fan touch air cover or air duct blockage;

11 air gap is not uniform, electric rotor phase rub.

Fault handling reason:

1 correction of the positive definite rotor slot;

2 insulation or maintenance slot wedge;

3 maintenance or replacement of new bearings;

4 fastening iron core punching piece or re pack;

5 check cause and process;

6 to use the instrument to check the processing;

7 after checking, the fault coil is processed;

8 re winding, correct the number of turns, so that the number of three-phase winding turns;

9 wash the bearing, fill in the appropriate amount of grease (1/2-1/3 of the bearing chamber);

10 repair the fan and the wind shield, make it a few box size is correct, clean the ventilation duct;

11 adjust air gap and improve assembly quality.