There are many reasons for the occurrence of reversing sparks. It is necessary to find the main reason among many factors in order to discharge faults and improve commutation. Check the method of the cause of the deterioration of the commutation. Nor...
The soft starter connected in series between the power supply and the controlled motor is used to control the conduction angle of the internal thyristor, so that the input voltage of the motor gradually rises from zero with a preset function relation...
When the motor is stopped, the traditional control method is completed by an instantaneous power failure. However, there are many applications that do not allow the motor to shut down instantaneously. For example, the high-rise building, the pump sys...
Conventional decompression starting methods for cage motors include Y-q starting, auto-decompression starting, and reactor starting. These starting methods are all graded decompression starting, and there are obvious disadvantages, that is, secondary...
The soft starter is a novel motor control device that integrates motor soft start, soft stop, light load energy saving and various protection functions. It is called Soft Starter in foreign countries. Its main component is a three-phase parallel thyr...
1. Phase loss operation. At this time, the noise of the motor is very large, and it is severely heated. This is also a deadly killer of the three-phase asynchronous motor, which usually burns out after ten minutes of operation. If the entire power su...
As an engineer and related technicians, how to choose an electric motor? 1. The type of power supply for the motor, such as single phase, three phase, direct current, etc. 2, the working environment of the motor, whether the workplace has special cha...
There are two possibilities. One is that the brush contact is not properly installed. The second is the rotor short circuit. Usually the brush unit pressure is too high, the brush wear is intensified, the unit pressure is too small, the contact is un...
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