电工技术学报  2025, Vol. 40 Issue (2): 587-597    DOI: 10.19595/j.cnki.1000-6753.tces.232105
电器装备及智能化 |
耐高温电机用微弧氧化陶瓷电磁线特性
付东山1, 王连可2,3, 王祥瑞1, 向波1, 雷厉3, 伍小杰1
1.中国矿业大学电气工程学院 徐州 221116;
2.西安交通大学电气工程学院 西安 710049;
3.诸暨市中俄联合材料实验室 诸暨 311899
The Characteristics of Micro-Arc Oxidation Ceramic Magnetic Wire for High Temperature Motor
Fu Dongshan1, Wang Lianke2,3, Wang Xiangrui1, Xiang Bo1, Lei Li3, Wu Xiaojie1
1. School of Electrical Engineering China University of Mining and Technology Xuzhou 221116 China;
2. School of Electrical Engineering Xi'an Jiaotong University Xi'an 710049 China;
3. Kunshan Sino-Russian Joint Zhuji Sino-Russian Joint Material Laboratory Zhuji 311899 China
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摘要 电机有机绝缘电磁线的绝缘材料高温下易分解,耐热等级有限,而外包陶瓷电磁线和阳极氧化电磁线柔韧性差,弯曲变形后电性能劣化。针对上述问题,该文提出基于微弧氧化陶瓷电磁线电机绕组方案。该陶瓷电磁线具有耐热等级高、柔韧性良好、弯曲变形后可维持电性能等特点,将其作为绕组应用于电机中可使电机工作温度达到350℃,突破传统有机绝缘电机温度的限制。首先介绍了微弧氧化陶瓷电磁线的形成机理、结构特点和高温下的物理特性;然后分析了微弧氧化陶瓷电磁线应用于电机中的电学特性,给出微弧氧化陶瓷电磁线应用于电机中的制作工艺和绝缘方式;最后研制一台基于微弧氧化陶瓷电磁线的电机样机,并对其进行了高温烘烤测试和动态性能测试实验,验证了微弧氧化陶瓷电磁线应用于高温电机的有效性和可行性。
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付东山
王连可
王祥瑞
向波
雷厉
伍小杰
关键词 微弧氧化陶瓷电磁线绝缘高温电机    
Abstract:The maximum tolerance temperature of the motor limits the winding current, thereby constraining the power density of the motor. The thermal resistance of a motor is influenced by the withstand temperature of the electrical insulation system (EIS). Insulating materials used in organic insulated magnetic wires for motors have limited thermal resistance levels and tend to decompose at high temperatures. Traditional ceramic and anodized magnetic wires exhibit poor flexibility, and their electrical properties deteriorate rapidly when bent or deformed. This paper proposes a motor winding scheme using micro-arc oxidation (MAO) ceramic magnetic wire. This wire is characterized by high-temperature resistance and excellent flexibility, maintaining electrical properties after deformation.
The formation mechanism of MAO ceramic magnetic wire is described, and its main characteristics are explained. MAO ceramic magnetic wire has discharge channels, micropores, and cracks in its film layer to release deformation stress. The base metal and the film layer constitute a typical laminated composite structure, providing the magnetic wire with good mechanical toughness while maintaining the properties of the raw material. The high-temperature physical and insulation properties of the samples are tested. The samples can maintain reliable performance after baking at high temperatures and bending, indicating good temperature resistance and stable insulation performance.
The wire is applied to a flux-switching motor to validate its feasibility in a high-temperature (HT) motor. The surface of the magnetic wire is first treated to increase its wear resistance and flexibility. The prototype stator undergoes baking in a high-temperature oven, with resistance and inductance changes measured at different temperatures and within seven days of baking at 350℃. Insulation resistances of interphases and phase-motor casing are measured at room temperature and 400℃. After baking, the resistance and inductance of the motor stator winding remain stable, and the insulation of the prototype exhibits a positive temperature coefficient characteristic. At high temperatures, insulation resistances of interphases and phase-motor casing are higher than those at room temperature. The results indicate that the motor winding based on MAO ceramic magnetic wire can operate stably in a high-temperature environment for an extended period. The high-temperature resistance of the assembled prototype is tested. After two hours of baking the motor in a 400℃ muffle furnace, the motor is cooled to room temperature for an operational test. The motor runs normally after baking, confirming the suitability of the MAO ceramic wire prototype in high-temperature environments.
The results demonstrate that MAO ceramic magnetic wire exhibits stable insulation under twisting and high-temperature conditions. It also has good mechanical toughness while maintaining the properties of the raw materials. After surface treatment, the MAO ceramic magnetic wire can be wound into motor windings and applied in motors. Using the high-temperature resistance of MAO ceramic magnetic wires, motors can surpass the limitations of traditional motor temperatures.
Key wordsMicro-arc oxidation    ceramic magnetic wire    insulation    high-temperature motor   
收稿日期: 2023-12-19     
PACS: TM304  
基金资助:国家重点研发计划(2023YFE0115900)/中国博士后科学基金项目(2024M753517)/江苏省自然科学基金项目(BK20231077)和电力设备电气绝缘国家重点实验室(西安交通大学)开放基金项目(EIPE23212)资助
通讯作者: 付东山 男,1990年生,博士,讲师,研究方向为电机系统及其控制。E-mail: fuds@cumt.edu.cn   
作者简介: 王连可 男,1995年生,博士研究生,研究方向为新型高温陶瓷绝缘电磁线。E-mail: wang.lianke@xjtu-sh.cn
引用本文:   
付东山, 王连可, 王祥瑞, 向波, 雷厉, 伍小杰. 耐高温电机用微弧氧化陶瓷电磁线特性[J]. 电工技术学报, 2025, 40(2): 587-597. Fu Dongshan, Wang Lianke, Wang Xiangrui, Xiang Bo, Lei Li, Wu Xiaojie. The Characteristics of Micro-Arc Oxidation Ceramic Magnetic Wire for High Temperature Motor. Transactions of China Electrotechnical Society, 2025, 40(2): 587-597.
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