Four analysis of servo motor failure

Four analysis of servo motor failure

Third, the motor can not be rotated after power-on, but no abnormal noise, no smell and smoke?

1, the cause of the failure

1 power is not connected (at least two phases are not connected);

2 fuse is blown (at least two phases are blown);

3 overcurrent relay is adjusted too small;

4 Control device wiring error.

2, troubleshooting

1 Check the power circuit switch, whether there is a breakpoint at the fuse and junction box, and repair;

2 Check the fuse type, the cause of the fuse, and replace the fuse;

3 adjust the relay setting value to match the motor;

4 Correct the wiring.

Fourth, the motor is broken

1, the cause of the failure

1 unreasonable mechanical design leads to excessive radial load force;

2 The load end is stuck or severely overloaded;

3 motor and reducer are disassembled when assembling;

2, troubleshooting

1 Check the maximum radial load force that can be withstood in the motor sample and improve the mechanical design;

2 Check the operation of the load end, confirm the actual process requirements and improve them;

3 Check whether the load operation is stable, whether there is vibration, and improve the mechanical assembly accuracy.

5. The motor no-load current is unbalanced, and the three-phase phase difference is large.

1, the cause of the failure

1 winding the first end of the winding is wrong;

2 power supply voltage imbalance;

3 windings have faults such as turn-to-turn short circuit and reverse coil connection.

2, troubleshooting

1 check and correct;

2 measure the power supply voltage and try to eliminate the imbalance;

3 Eliminate winding faults.

Sixth, the motor does not turn after the power is turned on.

1, the cause of the failure

1 The rotor winding has an open circuit (one phase disconnection) or the power supply loses phase;

2 The winding end of the winding lead wire is connected incorrectly or the winding is internally reversed;

3 power circuit contacts are loose, contact resistance is large;

4 the motor load is too large or the rotor is stuck;

5 power supply voltage is too low;

6 small motor assembly is too tight or the grease inside the bearing is too hard;

7 bearings are stuck.

2, troubleshooting

1 identify the breakpoint to be repaired;

2 check the polarity of the winding; determine whether the winding end is correct;

3 Fasten the loose connecting screws and use a multimeter to judge whether the joints are falsely connected and repair them;

4 load shedding or detecting and eliminating mechanical failures;

5 Check whether the specified surface connection method is misconnected; whether the voltage drop is too large due to the power supply wire is too large, and correct it;

6 re-assembly to make it flexible; replace qualified grease;

7 repair bearings.