| 车用永磁缓速器永磁体高温失磁研究 |
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| 引用本文： | 叶乐志,李德胜.车用永磁缓速器永磁体高温失磁研究[J].机械科学与技术(西安),2010(5). |
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| 作者姓名： | 叶乐志 李德胜 |
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| 作者单位： | 北京工业大学机械工程与应用电子学院; |
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| 基金项目： | 北京市教委科技成果转化基金项目(JP001014200801)资助 |
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| 摘 要： | 作为汽车辅助制动装置的永磁缓速器在工作时产生大量的热能,使转子在较短的时间内出现较大的温升,直接影响缓速器内永磁体的工作性能,严重时会引起永磁体失磁。为分析永磁缓速器中钕铁硼永磁体高温失磁的问题,建立永磁缓速器的数学模型,确定有限元分析边界条件。通过求解涡流去磁场,得到转子涡流场和永磁体比磁导分布情况,结合永磁体不同温度下退磁曲线分析永磁体失磁。试验结果验证了数值分析的正确性,表明在风冷散热条件下,永磁缓速器持续工作超过15 min永磁体会发生严重失磁,降低永磁缓速器的制动性能。
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| 关 键 词： | 辅助制动 高温失磁 有限元 永磁缓速器 |
Demagnetization Characteristic Analysis of Permanent Magnet Retarder in High Temperature |
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| Ye Lezhi,Li Desheng.Demagnetization Characteristic Analysis of Permanent Magnet Retarder in High Temperature[J].Mechanical Science and Technology,2010(5). |
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| Authors: | Ye Lezhi Li Desheng |
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| Affiliation: | College of Mechanical Engineering and Applied Electronics Technology/a>;Beijing University of Technology/a>;Beijing 100124 |
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| Abstract: | As an auxiliary brake,a Permanent Magnet Retarder(PMR) generates much energy and has greater temperature rise when PMR works,so that it has a direct impact on PMR work performance and even causes demagnetization seriously.In order to analyze permanent magnet demagnetization in high-temperature in PMR,PMR mathematical model is established firstly,and the boundary conditions of finite element analysis are determined.Then eddy current field distribution in the rotor is determined by solving eddy current demagn... |
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| Keywords: | auxiliary brake demagnetization on high temperature finite element method permanent magnet retarder |
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