Cooling motor in energy conversion, there is always a small part of the loss is converted into heat, it must be through the motor shell and the surrounding medium will continue to heat is emitted out, the heat dissipation process, we'll call for cooling. Cooling medium: a gas or liquid medium that transfers heat. A gas or liquid medium in which the temperature is lower than a part of a motor, which is in contact with the part of the motor and is taken away by the heat. Secondary cooling medi

The end cover is connected with the rotor and frame structure parts. On the one hand, it plays a protective role in the motor, on the other hand, the relative position of the stator and rotor is guaranteed by the rolling bearings installed in the end.The end cover is a connecting piece between the motor stator and the rotor. It is mainly the surface: fit with the stand stop mouth and face, and a rotating shaft and bearing with the shaft hole, a bearing chamber in the holes and the end surface. T

To ensure the accuracy of the size of the core file, otherwise affect the wear axis. Bearing gear size accuracy to meet the requirements of the drawings, or the impact of assembly, bearing diameter is too small to make the bearing loose, too general assembly difficulties or parts damaged or temperature rise too high. Bearing block and shaft gear are coaxial, will produce vibration and noise should not exceed the difference degree of symmetry. Otherwise it will cause the difficulty of assembling

(1) bearing radial clearance size. (2) the end cover and frame stiffness. Motor stator and rotor and the end cover is composed of a vibration system, poor axial rigidity of bearing and an end cover will be with the vibration of the motor system occurred tuning, causing large amplitude axial vibration is through a bearing reached the end cover and the motor and resonance noise, also electromagnetic noise of motor will through a bearing reached the end cap and the motor. (3) axial movement. Due to

Motor starting, including the motor access to the power from the rotor to reach the full speed of the whole process. Motor should be with a sufficiently large locked rotor torque and minimum torque and to drive mechanical load quickly starting, and reaches the rated speed and normal work; at the same time should have sufficient for the maximum torque, to ensure certain overload capacity. And for blocking the current (or blocking to the power), should be limited, so as to avoid the power supply h

Possible causes of failure of winding to ground:1 the winding is affected with damp, the insulation material loses the insulation function2 Motor long-term overload, insulation aging, cracking, shedding3 the insulation is damaged when the wire is embedded.4 stator and rotor rub, causing insulation burned out5 end winding end cap6 lead wire connection insulation damage and the case of contact

(1) long-term motor over load operation, winding current long-term and excessive, make insulation aging Jiaocui, loss of insulating effect or shaken and crack and fall off.(2) the winding insulation is affected with damp, without drying, direct access to the power supply, the power supply voltage causes insulation breakdown.(3) the insulation of the coil group of the stator winding or lead wire is broken or damaged, or when the connection is careless, one or a few coils are short.(4) for embedde

The electromagnetic noise radiation of the motor depends on the vibration response of the electromagnetic excitation force (Jing Xiangli), the vibration response of the motor structure and the surface acoustic radiation characteristics of the motor. Therefore, the method of reducing the noise of the motor can be attributed to:(1) reducing the electromagnetic vibration force and increasing the number of its force wave.(2) reducing the surface vibration of the motor.(3) reducing the acoustic radia

When the rotor core is pressed into the rotating shaft, the outer circle of the rotor core is also required to be refined, and the main processing technology is as follows: the outer circle of the rotor and the bearing file should be in the coaxial line, otherwise it will cause the eccentricity. The size precision and finish of the outer circle of the rotor should be in accordance with the requirements of the drawings, otherwise it will cause the air gap is too large or too small, which affects

The ventilation noise of the motor is mainly the following three kinds of components:(1) when the blades rotate, the blades of the vortex fan make the vortex flow, which is caused by the viscous force, and they break down into a series of small vortices, which cause the air to be disturbed. In addition, in the corner of the airflow movement, if there is a large cavity, it will produce a vortex sound. Vortex sound is a random steady noise of broadband. (2) the monotonous sound (Qi Disheng) is gen