utilizing the proper stator coil pitch is additionally important.our company is professional hydraulic motor,piston motor,pg电子下载-pg电子游戏 ,gearbox,pg电子下载-pg电子游戏 supplier providing customers from domestic zhongyiyepk and overseas the best and reliable hydraulic products. the stator coil pitch ratio should be selected to give small pitch factors for lower order of air gap harmonics. the motor designer will need to keep this in mind when designing the winding.
skewing of either rotor or stator slots is another way to reduce motor noise and provide smooth acceleration. the degree of skew also affects motor performance, therefore the skew is limited to performance parameters such as breakdown torque, starting torque and starting currents.
bearing noise
bearing noise can be influenced by several factors such as preload, shaft to bearing fits/tolerances, and bearing to bore fits/tolerances. the decision to which bearing to use should always depend on the application of the motor. it is highly recommended to involve bearing manufactures when choosing the bearing.
proper preloading is required to ensure the bearings run smooth. too much preloading will damage the bearings. same philosophy goes with the bearing fits to the motor shaft and housing and end bell bores. bearing manufactures have recommended fits/tolerances to implement during the mechanical design of the motor.
unbalance noise
unbalance noise is created by an unequal weight distribution of the rotor assembly around the motor axis of rotation. it has been found that vacuum impregnation and/or encapsulation of motor stator windings has also helped in coil vibration and noise. there are many ways to reduce motor noise. all motor parameters must be taken into account when designing the unit.
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