Study and development of test-bed for brushless DC hub-motor used in EV

DONG Zhu-rong1，2， LIANG Song-feng1， TIAN Chao-he2
（1.  Department of Automotive and Transportation Engineering， Shenzhen Polytechnic， Shenzhen 518055， China；
2. School of Mechanical， Electronic and Control Engineering，Beijing Jiaotong University， Beijing 100044， China）

Abstract： In order to solve the problems of performance testing and regenerative braking experiment for hub-motor of electric vehicle（EV），the virtual instrument technology was applied to design the test-bed for hub-motor of EV. After the analysis of the composition of the test-bed and the theory of constitution of the observer and control system，the peripheral circuit was designed. Computational formula for motor rev，motor torque，electric current，electric tension was deduced. The method of regenerative braking experiment and computational formula was presented. On this basis，LabVIEW was presented to develop software for the observer and control system. The experimental data results show that the design of the test-bed is reasonable. Hub-motor performance test and motor regenerative braking test are realized on this test-bed. It can meet the demand of experiments of hub-motor of EV.
Key words： electric vehicle（EV）； brushless hub-motor； test-bed； performance test； regenerative braking