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MotorIn the process of work development, different conditions of excessively high temperatures continue to occur, which will make the operation of the motor unstable and even cause it to fail to improve its work.The motor is an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction.Frequency conversion speed motorA general term for motors driven by frequency converters.In fact, the motor designed for the frequency converter is a special frequency conversion motor. The motor can achieve different speeds and torques under the drive of the frequency converter to adapt to the changes in the demand of the load.Explosion-proof motorsA type of motor that can be used in flammable and explosive plants, and it does not generate sparks during operation.Explosion-proof motors are mainly used in coal mines, oil and gas, petrochemical and chemical industries.In addition, it is also widely used in sectors such as textiles, metallurgy, city gas, transportation, grain and oil processing, papermaking, and medicine.There are many reasons why the temperature of the motor is too high. Our teachers can analyze and deal with them according to their own methods to avoid its impact on production.

As shown in Figure 1, when the instantaneous voltage exceeds 10% of the rated voltage of the motor, immediately or when the motor voltage ratio exceeds 5% of the rated voltage, it will cause the rated load to heat the motor and increase the temperature. In this case, the voltage should be checked and adjusted.

2. The unbalanced development of the three-phase power supply voltage technology of the motor will also cause the motor to heat up. This is because when the three-phase power supply input voltage unbalance exceeds 5%, it will easily cause the unbalance of the three-phase current. Ways to deal with it It is inspection and adjustment as well as voltage.

3. The contact problem of the motor power switch, the single-phase fuse break, will cause the lack of phase operation, and cause the temperature of the motor to rise.The solution is to repair or replace damaged parts.

The wiring of the motor windings is incorrect, causing the motor to run under the rated load to overheat. The solution is to correct the wiring of the windings.

As shown in Figure 5, the stator winding of the motor is sometimes opened in the short-circuit or grounding phase. This situation will lead to an increase in the current generated at the motor temperature. The solution is to increase the insulation for the center winding or directly replace it.

6. The cage rotor of the motor is broken or the wound rotor is loosened through the coil, which will cause the current of the maintenance network to increase and produce different temperature rises. The way to deal with it is to repair or replace a rotor.

As shown in Figure 7, when the motor bearing is worn severely, there will be a greater amount of heat generated by the wear. The solution is to check whether there is a loose bearing, if the stator and rotor have a bad match.

8. The excessive load of the motor is also the reason for the development of economic overheating. We can reduce the load or replace the high-power motor to solve the overheating problem.

9. The motor starts too frequently, the use environment temperature is too high, the ventilation is not smooth, etc. will also cause the motor temperature to be too high, reducing the number of starts, lowering the ambient temperature, ensuring unobstructed air ducts, eliminating dust and oil, and keeping the fan running well. To solve similar overheating problems.