ICS 29.160.20 CCS K 20 中华人民共和国国家标准 GB/T 20835 —2024 代替 GB/T 20835—2016 发电机定子铁心磁化试验导则 Guide for magnetization test of generator stator core 2024 ⁃08⁃23 发布 2025 ⁃03⁃01 实施 国家市场监督管理总局 发 布 国家标准化管理委员会 GB/T 20835—2024 目 次 前言··························································································································Ⅲ 1 范围·······················································································································1 2 规范性引用文件 ········································································································1 3 术语和定义··············································································································1 4 符号·······················································································································2 5 前期计算·················································································································3 5.1 定子铁心轭部截面面积 ·························································································3 5.2 定子铁心轭部质量 ·······························································································3 5.3 励磁线圈匝数与励磁电流 ······················································································3 5.4 试验电源容量·····································································································4 5.5 测试线圈电压·····································································································4 6 试验要求·················································································································4 6.1 试验现场···········································································································4 6.2 试验电源···········································································································4 6.3 测量仪器和仪表 ··································································································4 6.4 励磁线圈···········································································································5 6.5 测试线圈···········································································································5 7 试验方法·················································································································5 7.1 试验前检查········································································································5 7.2 试验接线···········································································································5 7.3 初始温度测量·····································································································6 7.4 试验时监测········································································································6 7.5 磁通密度的测量 ··································································································6 7.6 定子铁心损耗的测量 ····························································································6 7.7 磁通密度和时间 ··································································································7 7.8 试验记录···········································································································9 7.9 试验报告编制·····································································································9 7.10 试验后检查·······································································································9 8 质量判别·················································································································9 8.1 定子铁心最大温升的限值 ······················································································9 8.2 定子铁心相同部位最大温差的限值 ··········································································9 附录 A （资料性） 低磁通涡流检测方法 ············································································10 附录 B （资料性） 定子铁心比总损耗 ···············································································11 Ⅰ
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