The main reasons for the difficulty of shaded pole motors in starting are as follows:

1. Overload or stall

If the motor encounters too large a load at startup, or the rotor is stuck and cannot rotate, it will cause the motor to start with difficulty or even fail to start. This may be caused by mechanical failure of the equipment or improper load design.

2. Insufficient power supply

The motor requires a higher current at startup. If the power supply system capacity is insufficient, the power supply voltage will drop severely, thus limiting the motor starting. This may be caused by a small power supply line or insufficient power transformer capacity.

3. Winding failure

If there is a short circuit or broken wire in the motor stator winding, the electromagnetic force of the motor will be severely reduced, making it difficult to overcome the load to start. The insulation state and wiring of the winding need to be checked.

4. Bearing failure

Severe wear or stuck bearings will increase the mechanical resistance of the motor, limit the rotation of the rotor, and cause difficulty in starting. The bearings need to be checked and repaired or replaced.

5. Improper motor design

If the power and torque of the motor are not designed enough, the load is too large or the starting conditions are harsh, it will also cause problems of difficulty in starting. The matching performance of the motor needs to be evaluated.

For the above reasons, the following measures can be taken to eliminate the problem of shaded pole motor starting difficulties:

1. Check and eliminate mechanical faults to ensure normal load.

2. Upgrade the power supply system to ensure stable power supply voltage.

3. Inspect the stator winding and eliminate winding faults.

4. Repair or replace bearings to eliminate mechanical resistance.

5. Re-evaluate motor parameters and select appropriate models.

At the same time, auxiliary starting measures can also be taken, such as using star-delta starting, soft starting and other methods to alleviate the current impact and mechanical load when the motor starts. Through the above analysis and processing, the problem of shaded pole motor starting difficulties can basically be solved.