Vibration is one of the relatively strictly controlled performance parameters during motor operation. Especially for some precision equipment, the requirements for motor vibration performance are even stricter. In order to ensure that the motor performance meets the requirements, necessary measures will be taken in the specific parts processing during the motor production and manufacturing process.
Rotor dynamic balance is the key to ensuring the vibration performance of the motor. In addition to the design symmetry control of the rotor body, it is particularly important to carry out the necessary balance control through the rotor dynamic balance test link. For application conditions that do not require very demanding vibration performance, most of them are a specific turn The rotor is dynamically balanced at a high speed and controlled according to the final allowable unbalance amount that is different for each manufacturer; for pole-changing speed regulation or stepless speed regulation motors with changing speeds, the evaluation and evaluation must be done by adjusting the speed of the speed balancing machine. Verify the impact of rotor balancing effect on motor vibration performance.
Bearing system quality control is also a key link in motor vibration control. According to our national standards, motor products should use bearings with vibration acceleration no less than Z1. For occasions with higher vibration performance requirements, Z2 or even Z3 low-noise bearings should be used. . Regarding the vibration performance of the bearing body, the bearings of international brands have met the low-noise requirements, so there is no corresponding labeling in the bearing labeling; in addition, for motors with relatively slow motor speeds, it is not appropriate to use motors with large radial clearance. Bearings, such as: 2 to 8-pole motors mostly use C3 clearance bearings, while 10-pole and slower motors should use the basic set of clearance bearings.
In addition to the above factors, the impregnation effect of the winding and the coaxiality of the stator and rotor are important factors in controlling the electromagnetic vibration of the motor. If the impregnation is not good, there will be obvious vibration problems, and the stator and rotor will not be concentric, resulting in Uneven air gaps between the stator and rotor will also cause obvious low-frequency electromagnetic sound in the motor, which is naturally the result of electromagnetic vibration.
In addition to the production and processing process, the control of electromagnetic vibration requires more control through the design process. Necessary design improvements will suppress the generation of motor vibration.
Post time: Jan-23-2025