輪轂電機(jī)驅(qū)動(dòng)車輪不平衡電磁力分析
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中圖分類號(hào)：U469.72；TB115.1 文獻(xiàn)標(biāo)志碼：B
Analysis of electromagnetic force causing wheel imbalance in hub motor drive
QI Shiyin， SHAN Yingchun， LIU Xiandong （School of Transportation Science and Engineering，Beihang University，Beijing 1O22OO，China）
Abstract：In order to analyze the influence of factors such as motor slot shape，pole pairs，and different types of eccentricity on the unbalanced electromagnetic force of hub motors，a finite element model of surface-mounted outer-rotor permanent magnet synchronous hub motors isestablished. Based on electromagnetic simulation，the magnetic flux density distributions at air gap are obtained.The research results indicate that the slot opening size，symmetry of slots，and use of filets in slots all affct the numerical values of unbalanced electromagnetic forces.Changing the number of pole pairs significantly affects the distribution of the motor’s overall magnetic flux density；as the number of pole pairs increases，the magnetic flux density at the air gap increases significantly，leading to an exponential increase in unbalanced electromagnetic forces and a more uniform distribution.Diffrent types of eccentricities increase unbalanced electromagnetic forces，where dynamic eccentricity and mixed eccentricity result in complex harmonic generation，with multiples of the fundamental period correlating with the number of pole pairs.
Key words： surface-mounted permanent magnet synchronous hub motor；unbalanced electromagnetic force；slot structure；pole pair number；eccentricity
0引言
輪轂電機(jī)驅(qū)動(dòng)將電機(jī)直接安裝在汽車車輪內(nèi)部，通過(guò)直接驅(qū)動(dòng)車輪旋轉(zhuǎn)提供動(dòng)力。（剩余6956字）