The power causes overheat the motor has the following kinds

A the power supply voltage is too high,when the supply voltage is too high,counter electromotive

force of the motor,the magnetic flux and magnetic flux density increase.Due to the size of the iron loss and magnetic flux density is proportional to square of iron loss increase,lead to core overheating.And magnetic flux increasing,and the excitation current component has increased dramatically,due three phase induction motor to the stator winding copper loss increase,make the winding overheating.Therefore,the power supply voltage exceeds the rated voltage of the wholesalemotor.blogspot.com motor,motor overheating.

B,power supply voltage is too low,the power supply voltage is too low,if the electromagnetic torque of the motor remains unchanged,flux will reduce,the rotor current increases accordingly,load power component in stator current increase,caused by winding the copper loss increase,cause,rotor winding overheating.C,asymmetric motor power supply voltage,the motor when the ac geared motor power cord a phase circuit,the fuse fuse,or knife starting equipment led to a phase Angle head burns impassability,will cause single-phase,three-phase motor which run by large current of two phase winding overheating,and burned.D,unbalanced three-phase power supply,when unbalanced three-phase power,can make the unbalanced three phase current of the motor,causing winding overheating.From the above,when motor overheating,should first consider the power of reason.Confirm the power 220v ac electric motors aspects have no problem,then to consider other factors.