Why is a single-phase motor strong in reverse and not in forward rotation?
First of all, if there is no centrifugal switch, start the motor to see if the motor in the cooling fan is weak, the load is large or the motor capacity is not enough, the centrifugal switch is not reset, resulting in a smaller current, but the fan does not rotate, and other objects are the same. After the motor is started, when the speed reaches the rated speed, the centrifugal switch is turned on, and the phase sequence of the power supply to the motor winding will also generate a rotating magnetic field. The rotor of the motor rotates in the direction of this rotating magnetic field. It does not move, which leads to the appearance of the motor reversal.
Let's first judge whether the starting winding is short-circuited, causing the motor not to rotate, that is, to protect the motor, check the starting winding, if it is not burned out, if it is to protect the motor, just start it in this direction, because this is a direct start, if If it does not work, the motor is still connected to the running winding. If it does not work, the coil winding should be short-circuited. If the starting winding is short-circuited, the motor will be powered on and run without short-circuiting.
If it is overloaded and burnt out, the running winding will be notified, and the surface road conditions are normal. If it is overloaded, the running winding will be notified. The same as the surface ambient temperature, if the allowable temperature rise is exceeded, this is also the reason for heat dissipation.
If it is running the winding, then the high-voltage winding heating rod should be used. If the high-voltage winding heating rod is used, it will be faster and the cooling fan will be colder. When the high-voltage motor is overloaded, the heat needs to be dissipated. If it is due to long-term operation, the temperature of the motor will decrease. If the insulation level of the motor is too high, the insulation level of the motor winding will drop.
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