Article(id=1192878365968318802, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1192878363166523716, articleNumber=null, orderNo=null, doi=10.16790/j.cnki.1009-9239.im.2025.01.007, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1714320000000, receivedDateStr=2024-04-29, revisedDate=1718208000000, revisedDateStr=2024-06-13, acceptedDate=null, acceptedDateStr=null, onlineDate=1762333965054, onlineDateStr=2025-11-05, pubDate=1737302400000, pubDateStr=2025-01-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1762333965054, onlineIssueDateStr=2025-11-05, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1762333965054, creator=13701087609, updateTime=1762333965054, updator=13701087609, issue=Issue{id=1192878363166523716, tenantId=1146029695717560320, journalId=1149653034449285133, year='2025', volume='58', issue='1', pageStart='1', pageEnd='144', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1762333964387, creator=13701087609, updateTime=1762334342663, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1192879949821395698, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1192878363166523716, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1192879949821395699, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1192878363166523716, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=56, endPage=63, ext={EN=ArticleExt(id=1192878367369216342, articleId=1192878365968318802, tenantId=1146029695717560320, journalId=1149653034449285133, language=EN, title=Research on thermal mechanical stress distribution of motor insulation structure, columnId=1190369198472794288, journalTitle=Insulating Materials, columnName=Insulation Technology, runingTitle=null, highlight=null, articleAbstract=
To explore the thermal mechanical stress distribution of motor insulation structure at high temperatures, we take the insulation structure of organic silicone system as the research object, test its thermal expansion coefficient and elastic modulus at different temperatures, and analyze the influence of thermal stress parameters at different temperatures on the thermal mechanical stress of organic silicone insulation system. The results show that within -50-200℃, the thermal expansion coefficient of insulation structure show a change trend of increases, decreases, and increases again with the increase of temperature, and its value is 0.8×10-5-1.7×10-5 K-1. The elastic modulus increases at first and then decrease with the increase of temperature, and its value is 0.2×103-3×103 MPa. The thermal mechanical stress borne by insulation structures increases linearly with the increase of thermal expansion coefficient and elastic modulus. The thermal mechanical stress of insulation structures firstly increases and then decreases with the increase of temperature, depending on the size of thermal expansion coefficient and elastic modulus at different temperatures. The feasibility of testing parameters and simulation analysis was verified through stress testing of the wire rod and motor, and the deviation between simulation value and testing value is within 15%. The simulation analysis results show that at 120℃, the maximum thermal mechanical stress point of motor insulation is located at the slot insulation, and the maximum stress value is 11.37 MPa. After sealing, the maximum thermal stress value of the slot insulation can be reduced by about 45%.
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为探索电机绝缘结构在高温下的热机械应力分布,本文以有机硅体系绝缘结构为研究对象,测试其在不同温度下的热膨胀系数及弹性模量,分析不同温度下的热应力参数对有机硅绝缘系统热机械应力的影响。结果表明:在温度为-50~200℃内,绝缘结构的热膨胀系数随着温度的升高先增大后减小再增大,其值为0.8×10-5~1.7×10-5 K-1;弹性模量随着温度的升高呈先增大后减小的趋势,其值为0.2×103~3×103 MPa。绝缘结构承受的热机械应力随着热膨胀系数、弹性模量的增加线性增大,绝缘结构的热机械应力随着温度的升高先增大后减小,取决于不同温度下热膨胀系数和弹性模量的大小。通过线棒和电机整机应力测试,验证了测试参数及仿真分析的可行性,仿真值与测试值的偏差在15%以内。仿真分析结果显示:在120℃下,电机绝缘最大热机械应力点位置位于槽口绝缘处,最大值为11.37 MPa,灌封后槽口绝缘最大热机械应力值可降低45%左右。
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李丹(1986-),女(汉族),山东菏泽人,高级工程师,主要从事电机绝缘系统的仿真技术的研究。
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刘冠芳(1983-),女(汉族),河南灵宝人,正高级工程师,主要从事电机绝缘系统的设计技术的研究。
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刘冠芳(1983-),女(汉族),河南灵宝人,正高级工程师,主要从事电机绝缘系统的设计技术的研究。
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热膨胀系数测试结果, figureFileSmall=0adTxgVRO/5m29HAOFMMOg==, figureFileBig=tegKYmVxus/DecfrKHfV8Q==, tableContent=null), ArticleFig(id=1193252958277169365, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=EN, label=Fig.2, caption=
Test results of the elastic modulus, figureFileSmall=K8LKR0Zi4eo0rj2NVSDXUA==, figureFileBig=Wbkzx92NVjE51RrlipfC5w==, tableContent=null), ArticleFig(id=1193252958352666839, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=CN, label=图2, caption=
弹性模量测试结果, figureFileSmall=K8LKR0Zi4eo0rj2NVSDXUA==, figureFileBig=Wbkzx92NVjE51RrlipfC5w==, tableContent=null), ArticleFig(id=1193252958440747225, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=EN, label=Fig.3, caption=
The 3D finite element model of bar, figureFileSmall=xbO4hW6EAw6aNKX9xV/ptQ==, figureFileBig=QVJvo4cj7I5Bzyv1qFviEg==, tableContent=null), ArticleFig(id=1193252958512050395, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=CN, label=图3, caption=
线棒三维有限元模型, figureFileSmall=xbO4hW6EAw6aNKX9xV/ptQ==, figureFileBig=QVJvo4cj7I5Bzyv1qFviEg==, tableContent=null), ArticleFig(id=1193252958587547869, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=EN, label=Fig.4, caption=
The influence of thermal expansion coefficient on the stress of insulation structures, figureFileSmall=ePRMN9cr6oN/VyTskpQ10A==, figureFileBig=TxL0cOQRHki9htm+8ygLsw==, tableContent=null), ArticleFig(id=1193252958667239647, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=CN, label=图4, caption=
热膨胀系数对绝缘结构应力的影响趋势图, figureFileSmall=ePRMN9cr6oN/VyTskpQ10A==, figureFileBig=TxL0cOQRHki9htm+8ygLsw==, tableContent=null), ArticleFig(id=1193252958742737121, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=EN, label=Fig.5, caption=
The influence of elastic modulus on the stress of insulation structures, figureFileSmall=zj9WO99fDd9FolnM93Qkdw==, figureFileBig=rMBHlowpyGtFBlm5zoVLGA==, tableContent=null), ArticleFig(id=1193252958835011811, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=CN, label=图5, caption=
弹性模量对绝缘结构应力的影响趋势图, figureFileSmall=zj9WO99fDd9FolnM93Qkdw==, figureFileBig=rMBHlowpyGtFBlm5zoVLGA==, tableContent=null), ArticleFig(id=1193252958939869413, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=EN, label=Fig.6, caption=
Strain testing position of wire rod, figureFileSmall=A8lRsNRuHxbybloDi+UGLQ==, figureFileBig=bKypgEphItBTy29SkZc9/w==, tableContent=null), ArticleFig(id=1193252959027949799, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=CN, label=图6, caption=
线棒应变测试位置, figureFileSmall=A8lRsNRuHxbybloDi+UGLQ==, figureFileBig=bKypgEphItBTy29SkZc9/w==, tableContent=null), ArticleFig(id=1193252959086670057, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=EN, label=Fig.7, caption=
The influence of temperature on the stress of insulation structures, figureFileSmall=Dm0H/71naxoi2Bpi8cU7Qg==, figureFileBig=s6s/swhs6k1A4rWduZHIUw==, tableContent=null), ArticleFig(id=1193252959162167531, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=CN, label=图7, caption=
温度对绝缘结构应力的影响趋势图, figureFileSmall=Dm0H/71naxoi2Bpi8cU7Qg==, figureFileBig=s6s/swhs6k1A4rWduZHIUw==, tableContent=null), ArticleFig(id=1193252959212499181, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=EN, label=Fig.8, caption=
Complete stator and 1/4 stator simulation analysis model, figureFileSmall=HLAqSyoASYTxRU3hTXOFBA==, figureFileBig=M+HXS8IQOg16ogNupOV1Fw==, tableContent=null), ArticleFig(id=1193252959271219438, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=CN, label=图8, caption=
完整定子与1/4定子仿真分析模型, figureFileSmall=HLAqSyoASYTxRU3hTXOFBA==, figureFileBig=M+HXS8IQOg16ogNupOV1Fw==, tableContent=null), ArticleFig(id=1193252959384465648, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=EN, label=Fig.9, caption=
Cloud diagram of insulation stress distribution for the complete stator and 1/4 stator, figureFileSmall=Lzs5Sf7orbawMRcZz9XZsw==, figureFileBig=OGWuGSVmDXzjOxhqTzP5gQ==, tableContent=null), ArticleFig(id=1193252959443185906, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=CN, label=图9, caption=
完整定子和1/4定子绝缘应力分布云图, figureFileSmall=Lzs5Sf7orbawMRcZz9XZsw==, figureFileBig=OGWuGSVmDXzjOxhqTzP5gQ==, tableContent=null), ArticleFig(id=1193252959543849203, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=EN, label=Fig.10, caption=
Schematic diagram of the stator thermal stress testing points, figureFileSmall=Jgs4V1hb3KpqNEpO6rsMpQ==, figureFileBig=ouSGRJ1pFRzf2qBR8eGEAA==, tableContent=null), ArticleFig(id=1193252959631929589, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=CN, label=图10, caption=
电机定子热应力测试点示意图, figureFileSmall=Jgs4V1hb3KpqNEpO6rsMpQ==, figureFileBig=ouSGRJ1pFRzf2qBR8eGEAA==, tableContent=null), ArticleFig(id=1193252959682261239, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=EN, label=Fig.11, caption=
The 3D calculation model of motor before and after sealing, figureFileSmall=QsOgvarkgs2oDTgPpeW9DA==, figureFileBig=UmvY40L/rkpt4IHlknQkiQ==, tableContent=null), ArticleFig(id=1193252959749370105, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=CN, label=图11, caption=
灌封前后电机三维计算模型, figureFileSmall=QsOgvarkgs2oDTgPpeW9DA==, figureFileBig=UmvY40L/rkpt4IHlknQkiQ==, tableContent=null), ArticleFig(id=1193252959816478971, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=EN, label=Fig.12, caption=
Distribution diagram of main insulation stress before and after sealing, figureFileSmall=rg8WEL0hSKLCxJ7C+e0pkA==, figureFileBig=77Qc62JVYTufhL6taIFDFw==, tableContent=null), ArticleFig(id=1193252959879393533, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=CN, label=图12, caption=
灌封前后主绝缘应力分布图, figureFileSmall=rg8WEL0hSKLCxJ7C+e0pkA==, figureFileBig=77Qc62JVYTufhL6taIFDFw==, tableContent=null), ArticleFig(id=1193252959942308095, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=EN, label=Table 1, caption=
Performance parameters of thermal expansion instrument, figureFileSmall=null, figureFileBig=null, tableContent=
| 性能参数 | 数值 |
| 样品直径/mm | 6 |
| 样品长度/mm | 20 |
| 加热冷却速率/(K/min) | 0~50 |
| 温度范围/℃ | -150~500 |
| 分辨率/nm | 0.125 |
), ArticleFig(id=1193252960001028353, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=CN, label=表1, caption=
热膨胀仪性能参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 性能参数 | 数值 |
| 样品直径/mm | 6 |
| 样品长度/mm | 20 |
| 加热冷却速率/(K/min) | 0~50 |
| 温度范围/℃ | -150~500 |
| 分辨率/nm | 0.125 |
), ArticleFig(id=1193252960072331523, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=EN, label=Table 2, caption=
Thermal stress parameters, figureFileSmall=null, figureFileBig=null, tableContent=
| 材料 | 导热系数/(W/(m·K)) | 泊松比 | 密度/(g/cm3) |
| 绝缘 | 0.32 | 0.3 | 1.67 |
| 铜 | 398 | 0.27 | 8.9 |
| 硅钢 | 40 | 0.27 | 7.83 |
), ArticleFig(id=1193252960147828997, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=CN, label=表2, caption=
热应力输入参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 材料 | 导热系数/(W/(m·K)) | 泊松比 | 密度/(g/cm3) |
| 绝缘 | 0.32 | 0.3 | 1.67 |
| 铜 | 398 | 0.27 | 8.9 |
| 硅钢 | 40 | 0.27 | 7.83 |
), ArticleFig(id=1193252960223326471, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=EN, label=Table 3, caption=
Maximum stress and deformation of the complete stator and 1/4 stator, figureFileSmall=null, figureFileBig=null, tableContent=
| 模型 | 最大应力/MPa | 绝缘结构最大应力/MPa | 铜导体最大应力/MPa | 绝缘结构最大形变/mm |
| 完整定子 | 35.48 | 7.23 | 17.64 | 0.134 5 |
| 1/4定子 | 36.61 | 7.67 | 16.14 | 0.146 6 |
| 绝对偏差/% | 3.18 | 6.09 | 8.50 | 8.99 |
), ArticleFig(id=1193252960290435337, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=CN, label=表3, caption=
完整定子和1/4定子模型最大应力及变形
, figureFileSmall=null, figureFileBig=null, tableContent=
| 模型 | 最大应力/MPa | 绝缘结构最大应力/MPa | 铜导体最大应力/MPa | 绝缘结构最大形变/mm |
| 完整定子 | 35.48 | 7.23 | 17.64 | 0.134 5 |
| 1/4定子 | 36.61 | 7.67 | 16.14 | 0.146 6 |
| 绝对偏差/% | 3.18 | 6.09 | 8.50 | 8.99 |
), ArticleFig(id=1193252960349155595, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=EN, label=Table 4, caption=
Thermal stress simulation and testing results, figureFileSmall=null, figureFileBig=null, tableContent=
| 温度/℃ | 40 | 80 | 120 |
| 1# | 测试值/MPa | 5.39 | 20.21 | 40.73 |
| 仿真值/MPa | 5.61 | 20.45 | 37.51 |
| 绝对偏差/% | 4.08 | 1.19 | 7.91 |
| 2# | 测试值/MPa | 1.11 | 4.47 | 3.07 |
| 仿真值/MPa | 0.94 | 4.71 | 3.19 |
| 绝对偏差/% | 15.31 | 5.37 | 3.91 |
| 3# | 测试值/MPa | 1.34 | 6.41 | 6.34 |
| 仿真值/MPa | 1.20 | 5.56 | 5.60 |
| 绝对偏差/% | 10.45 | 13.26 | 11.67 |
| 4# | 测试值/MPa | 1.15 | 4.67 | 4.43 |
| 仿真值/MPa | 0.98 | 4.50 | 4.21 |
| 绝对偏差/% | 14.78 | 3.64 | 4.97 |
), ArticleFig(id=1193252960416264461, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=CN, label=表4, caption=
热应力仿真及测试结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 温度/℃ | 40 | 80 | 120 |
| 1# | 测试值/MPa | 5.39 | 20.21 | 40.73 |
| 仿真值/MPa | 5.61 | 20.45 | 37.51 |
| 绝对偏差/% | 4.08 | 1.19 | 7.91 |
| 2# | 测试值/MPa | 1.11 | 4.47 | 3.07 |
| 仿真值/MPa | 0.94 | 4.71 | 3.19 |
| 绝对偏差/% | 15.31 | 5.37 | 3.91 |
| 3# | 测试值/MPa | 1.34 | 6.41 | 6.34 |
| 仿真值/MPa | 1.20 | 5.56 | 5.60 |
| 绝对偏差/% | 10.45 | 13.26 | 11.67 |
| 4# | 测试值/MPa | 1.15 | 4.67 | 4.43 |
| 仿真值/MPa | 0.98 | 4.50 | 4.21 |
| 绝对偏差/% | 14.78 | 3.64 | 4.97 |
), ArticleFig(id=1193252960479179023, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=EN, label=Table 5, caption=
Simulation calculation results of thermal stress before and after sealing MPa, figureFileSmall=null, figureFileBig=null, tableContent=
| 计算工况 | 40℃ | 80℃ | 120℃ |
| 灌封前槽口最大应力 | 2.16 | 9.82 | 11.37 |
| 灌封后槽口最大应力 | 0.95 | 5.89 | 6.27 |
| 灌封胶末端位置最大应力 | 1.88 | 6.32 | 7.70 |
), ArticleFig(id=1193252960546287889, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1192878365968318802, language=CN, label=表5, caption=
灌封前后热应力仿真计算结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 计算工况 | 40℃ | 80℃ | 120℃ |
| 灌封前槽口最大应力 | 2.16 | 9.82 | 11.37 |
| 灌封后槽口最大应力 | 0.95 | 5.89 | 6.27 |
| 灌封胶末端位置最大应力 | 1.88 | 6.32 | 7.70 |
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