单相发电机绕组计算,铁心外径160mm,内径95mm,长85mm,最好有公式。谢了
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异步电机绕组重绕准备工序异步电机绕组重绕预备工序包括:绕组原始数据的记录、绕组的拆除与清理、线圈的绕制和绝缘件的裁剪等。一、绕组原始数据的记录原始数据记录是修理电机重要的基本技术资料,是确定绕线模尺寸、选用线径、绕制绕组型式及复算的依据。(一)原始数据记录的内容原始数据的内容有铭牌数据、绕组数据和铁心数据三类,可用填写表格的方式做记录。表1-4-1三相异步电机原始数据记录表 型号 功率kw) 转速(r/min) 故障现象、原因 及检修措施 电压(V) 电流(A) 绝缘等级 接法 绝缘材料槽绝缘 材料 绕组数据 每槽导线数 定子槽数 槽绝缘 厚度 导线型号 型式 铁心数据定子铁心内径 线圈匝数 节距 定子铁心外径 并绕根数 线径 定子铁心长度 并联支路数 伸出铁心长度 槽形尺寸 旧线重量(kg) 转子铁心外径 引出线与机座的相对位置 绕组接线草图记录日期 记录者 检查者 编号 表1-4-2单相异步电机原始数据记录表 型号 功率(kw) 电压(V) 型式 用途 转速(r/min) 电流(A) 绝缘等级 电容器容量 电容耐压 生产厂家 绕组型式 节距槽号 线圈匝数 线径 绕组接线图 工作绕组 起动绕组 调速绕组 记录时间 记录者 检查者 编号 对于铭牌数据可直接填入数据记录表格中,其余数据记录则要在拆除过程中进行。由于绕组的结构和接线的复杂性,拆换电机绕组前,必须先对各种绕组的构成及特征有一定的了解和熟悉,才能把握拆换绕组工艺。(二)判别绕组的结构型式1.单层绕组 绕组总线圈数为定子槽数的一半,即式中 ——绕组总线圈数2.双层绕组 绕组总线圈数与定子槽数等同,即3.显极式布线 相邻两线圈(组)的跨接线为“头接头”、“尾接尾”;或极相组数(线圈组数)为偶数绕组。4.庶极式布线相邻两线圈(组)的跨接线为“头接尾”、“尾接头”;或极相组数(线圈组数)为奇数绕组。(三)判别极数 1. 看铭牌可直接从电机铭牌的型号中看出,如Y132L一2中的“2”即表示二极。也可从铭牌中的转速参数推算出 (取整)2.查结构铭牌已失落的电机,可查看绕组结构后,由线圈节距 推算出(向下取整取偶)3.万用表判定将电动机六个接线头分开,把万用表打在最小直流毫安档,用表笔接在其中一相绕组的两个线头,用手缓慢、匀速地转动电动机一圈,观察表针的摆动次数。若摆动一次,则电动机为2极,若摆动两次,则电动机为4极,以此类推。(四)判别绕组节距 绕组节距 就是线圈的两有效边跨越的定子铁心槽数。在拆除旧绕组时可直接数出,要注意绕组有等节距与不等节距之分,故查看应仔细,并分别记入表中。(五)判别线圈并绕 (六)辨别绕组并联支路数。
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