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 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...
Cage asynchronous motors are inductive loads in which the current in the stator coil windings lags behind the voltage. If the working voltage of the motor is constant, when the load is light, the power factor is low, and when it is under heavy load, ...
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 aerodynamic noise of the motor is caused by the flow and change of the rotating rotor and the cooling fan rotating with the shaft. It increases with the increase of the speed of the fan and the rotor. The faster and the more the flow, the more th...
The low-frequency noise generated by the vibration of the magnetic field in the air gap of the motor caused by the vibration of the stator, the rotor and the whole motor structure is electromagnetic noise. From the perspective of the influence of the...
The friction, impact, unbalance and structural resonance of the motor running part will produce mechanical noise. The mechanical noise of the aluminum shell motor is relatively large, usually about 10%-15%. The mechanical noise includes bearing noi...
