Study on Magnetic Properties of High Performance NdFeB Magnets for NEVs under Extreme Working Conditions
The long-lived changes of magnetic properties of high-performance NdFeB magnets for New Energy Vehicles(NEVs)under extreme conditions were studied through a series of experiments including high temperature storage test,ther-mal shock test,high temperature and humidity storage test,highly accelerated stress test.It indicates that the changes of mag-netic properties are mainly affected by high temperature under the condition of good coating protection of high-performance Nd-FeB magnets.When the maximum designed operating temperature of the magnet is higher than the actual,the irreversible magnetic loss is less than 1％after long-term extreme working conditions,which is helpful for the subsequent service evalua-tion of high-performance NdFeB and possesses a positive guiding significance to improve the evaluation standards of NdFeB.
NEVshigh performance NdFeB magnetextreme working conditionsmagnetic properties,evaluation method
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