What To Do If The Bridge Crane Motor Heats Up!

Dec 15, 2022

Regardless of the lifting capacity of the bridge crane is 5 ton, 10 ton, 20 ton, 50 ton, 100 ton, 500 ton, its electrical part mainly includes the motor of each mechanism, brake electromagnet, operating electrical appliances and protective electrical appliances, etc. It is the control system that directs the work of each mechanism of the bridge crane.

The motor is the main driving part of the Dejun bridge crane, and the AC motor is generally used.

Because the AC motor can directly obtain electric energy from the grid, the operation is simple, the maintenance is easy, the weight of the unit is light, and the work is reliable.

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When selecting the type of bridge crane motor, it is necessary to calculate the drive power of the motor, the overload capacity of the motor, and the heat generation calibration, etc., and consider a certain margin. Therefore, under normal use of the crane, the heat generated by the motors of each mechanism will not exceed the standard requirements.


If the motor is found to be overheated during use, it needs to be carefully analyzed, and the fault can be eliminated before continuing to use, otherwise it will easily cause accidents such as motor burnout.


First of all, check whether it is overloaded. Overloading will cause the motor to heat up. Long-term overloading will burn the motor.

If the motor is still hot if it is not overloaded, it is necessary to check whether the motor itself is faulty.

For example, check whether the motor bearing is damaged, etc.


Secondly, it is necessary to check whether the working system of the bridge crane motor matches the level of the crane working mechanism. If the working system of the motor cannot reach the frequency and time interval of continuous work of the bridge crane mechanism, it is also one of the reasons for the motor to heat up. Work in strict accordance with the motor duty system.


Finally, it is necessary to check whether the brake used with the motor can be fully opened. If the brake gap is too small when the motor is running, it cannot be completely disengaged, which will generate a lot of friction. The friction and heat are also equivalent to an additional load. The speed of the motor decreases, the current becomes larger and generates heat. At this time, the work should be stopped and the brake clearance should be readjusted.


Through the above inspections, the fault of overheating of the bridge crane motor can basically be solved. If it still cannot be ruled out, please contact us in time to send professionals to deal with it.

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