Temperature rise is a critical performance indicator for electric motor products. There are many factors that affect the temperature rise of electric motors.
Some are design factors, which means that during the product design stage, due to various considerations, the temperature rise margin of the product may be designed to be smaller.
Others are related to manufacturing processes and other aspects, such as poor insulation treatment process for motor windings, failure to follow standardized operating procedures, and incorrect use of components during production.
For strictly controlled and qualified motor products that have already left the factory, it is sometimes found that there is a significant increase in temperature rise during use. One undeniable factor contributing to this issue is the misalignment of the electric motor's rotation direction.
The likely cause of this problem is that the wind path of the electric motor is asymmetric. Some electric motors use centrifugal fans, which require a specific direction of rotation to form a good ventilation and heat dissipation system with other components of the electric motor.
If the direction of the motor is changed, it naturally changes the wind path of the motor, directly leading to poorer ventilation conditions for the electric motor and possibly serious consequences such as rapid temperature rise in the winding within a short period of time.
Therefore, for motors with specific requirements for rotation, their rotational requirements will be clearly stated when they leave the factory, and users should follow the instructions provided to use them properly.
In addition to the steering requirements of the electric motor body, some refrigeration devices, such as axial flow fans, centrifugal fans, air-air coolers, and other refrigeration devices used in conjunction with motors, also have special requirements for the direction of the matching electric motor.
These requirements will be specifically marked on their products. The installation and use of electric motors should be strictly operated and verified according to these requirements to prevent unexpected temperature rise issues.
Especially for three-phase motors, most electricians know how to adjust the motor's direction.
For electric motors that can rotate forward and backward, they can be adjusted according to the actual operational needs of the equipment.
However, for electric motors with fixed directional requirements, caution should be exercised.
