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- 2024-12-20Notes on bearing lubrication
Most small motors have adopted double-sealed bearings (with "ZZ" after the bearing model). This type of bearing is pre-oiled and does not need to be re-oiled. ...
- 2024-12-19Why can't the motor be started frequently?
The starting current of the motor is 4 to 7 times the rated current. Such a large starting current will cause the motor to heat up seriously ...
- 2024-12-18What is the difference between NEMA4 and NEMA4X?
NEMA4 (National Electrical Manufacturers Association 4): outdoor or outdoor installation, dustproof, rainproof, splashing water, water pipe spray and external freezing and other damage. ...
- 2024-12-17Effect of motor speed change on bearing temperature
The heating of motor bearings has a certain relationship with the speed of the motor. When selecting motor bearings, engineering and technical personnel will check the maximum and minimum speeds of the motor bearings. ...
- 2024-12-16Why does the motor shaft breakage problem occur?
Any problem with a product is likely to be related to manufacturing or use. For example, the motor shaft breakage problem: On the one hand, the motor manufacturer will take necessary measures in the shaft design and manufacturing process, bu ...
- 2024-12-13The necessity of grounding three-phase motors
Three-phase motors are motors that use AC power and require three power cords for operation. Under normal circumstances ...
- 2024-12-12Causes and solutions for the spot on the transformer housing
The transformer housing is charged mainly because there is a voltage difference between the housing and the ground, which causes a high potential on the housing. This voltage difference may be caused by insulation damage between the housing ...
- 2024-12-11Common faults of motor cores
1. Short circuit between silicon steel sheets caused by insulation damage; 2. Loose core caused by poor tightening and motor vibration; ...
- 2024-12-10Steps for modifying a single-phase series-excited motor
According to the selected modification plan, make corresponding modifications. For example, if you choose to increase the excitation resistance, you need to add a resistor to the motor winding; if you replace the rotor, you need to remove th ...
- 2024-12-06How to effectively avoid motor burnout?
The technical status of the motor starting equipment plays a decisive role in the normal starting of the motor. Practice has shown that the vast majority of burnt motors are caused by abnormal operation of the starting equipment ...
