Analysis and Improvement of Axial Vibration in Battery Cooling Fan for New Energy Vehicle
Journal Title: 河南科技大学学报（自然科学版） - Year 2017, Vol 38, Issue 4
Abstract
In order to solve the problem of large axial vibration in battery cooling fan for new energy vehicle froma Fuzhou company, the technology of vibration reduction for cooling fan systems was studied. Affecting factors of the axial vibration of fan were analyzed. Through the vibration testing of fan prototype conducted by using INV3160 intelligent signal acquisition instrument and DASP data acquisition analysis software ( engineering edition) , it was obtained that the main affecting factors of the axial vibration of fan were commutation ripple and cogging ripple of brushless motor. Furthermore, the fan vibration damper was designed and improved, and the external rotor motor was tooth surface. The improved results were compared with original results through test. The test results show that improving the damping structure decreases power spectrum amplitude of commutation ripple and cogging ripple of brushless direct current motor at low speed by more than 50%. Slotting on the motor tooth surface can decrease harmonic amplitude of axial vibration by 45. 8%, which can effectively reduce the effect of high frequency torque ripple on fan vibration for brushless direct current motor.
Authors and Affiliations
Jinbo REN, Xiang ZHANG, Huojie SHI
Keywords
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