CN110277231A - 一种绝缘线结构医用隔离变压器 - Google Patents

一种绝缘线结构医用隔离变压器 Download PDF

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CN110277231A
CN110277231A CN201910576907.5A CN201910576907A CN110277231A CN 110277231 A CN110277231 A CN 110277231A CN 201910576907 A CN201910576907 A CN 201910576907A CN 110277231 A CN110277231 A CN 110277231A
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吴美琼
王大彦
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Zhuhai Xfrmtronics Technologies Co Ltd
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Abstract

本发明公开了一种绝缘线结构医用隔离变压器，包括变压器铁芯、初级绕组、次级绕组和层间绝缘层，初级绕组绕制在变压器铁芯外侧，层间绝缘层设置在初级绕组外侧，次级绕组绕在层间绝缘层外侧，次级绕组外侧包覆外部绝缘层，本发明结构设计新颖，完全避免初次级绕组之间产生寄生电容；而且变压器铁芯和初级绕组之间设置的层间绝缘层能够降低变压器绕组的温升；另外，本发明取消封闭式绝缘结构之后，降低了初级绕组温升，变压器效率提供，产品整体尺寸变小。

Description

一种绝缘线结构医用隔离变压器
技术领域
本发明涉及变压器技术领域，具体为一种绝缘线结构医用隔离变压器。
背景技术
变压器(Transformer)是利用电磁感应的原理来改变交流电压的装置，主要构件是初级线圈、次级线圈和铁芯(磁芯)。主要功能有：电压变换、电流变换、阻抗变换、隔离、稳压(磁饱和变压器)等。按用途可以分为：电力变压器和特殊变压器(电炉变、整流变、工频试验变压器、调压器、矿用变、音频变压器、中频变压器、高频变压器、冲击变压器、仪用变压器、电子变压器、电抗器、互感器等)。
当前使用的环形医用隔离变压器产品，初次级之间的绝缘都使采用多层的绝缘用聚酯薄膜或者1-3层绝缘纸将初级绕组完全封闭。绝缘纸和绝缘膜对初级绕组的全封闭绝缘会导致变压器铁芯和绕组的热量不能扩散，铁芯和绕组的热量积聚到初级绕组。温升过高情况下，电阻上升，输出电压降低导致损耗增大。目前通行的做法是把变压器绕组所用导线截面积加大来降低变压器绕组本升的热量。这种工艺不仅增加成本而且将体积增大了。与此同时，多层绝缘用聚酯薄膜一般用于电容工艺，这将导致初次级之间产生一个高容量的电容，储能得形成在断电后会产生剩余电压，必须通过剩余电压释放电路来释放变压器电感和寄生电容的储能。
发明内容
本发明的目的在于提供一种绝缘线结构医用隔离变压器，以解决上述背景技术中提出的问题。
为实现上述目的，本发明提供如下技术方案：一种绝缘线结构医用隔离变压器,包括变压器铁芯、初级绕组、次级绕组和层间绝缘层，所述初级绕组绕制在变压器铁芯外侧，所述层间绝缘层设置在初级绕组外侧，所述次级绕组绕在层间绝缘层外侧，所述次级绕组外侧包覆外部绝缘层。
优选的，所述层间绝缘层采用绝缘线线绕结构，所述绝缘线包括铜芯层、第一绝缘层和第二绝缘层，所述第一绝缘层采用乙烯-四氟乙烯共聚物、聚四氟乙烯混合制成；所述第二绝缘层采用聚对苯二甲酸乙二醇酯、聚四氟乙烯混合制成。
优选的，所述层间绝缘层与次级绕组之间设置单层绝缘膜，所述单层绝缘膜组份按重量份数包括40-50份PET树脂、10-20份二异氰酸酯、4-10份多亚甲基多苯基异氰酸酯、2-6份松香季戊四醇酯、1-3份季戊四醇磷酸酯、2-8份聚乙烯醇缩甲醛纤维、3-9份聚四氟乙烯。
优选的，所述外部绝缘层由50％三元乙丙橡胶、20％煅烧陶土、20％白炭黑、10％聚丙烯增强纤维组成。
优选的，所述层间绝缘层中绝缘线绕制20-150圈。
与现有技术相比，本发明的有益效果是：
(1)本发明结构设计新颖，完全避免初次级绕组之间产生寄生电容；而且变压器铁芯和初级绕组之间设置的层间绝缘层能够降低变压器绕组的温升；另外，本发明取消封闭式绝缘结构之后，降低了初级绕组温升，变压器效率提供，产品整体尺寸变小。
(2)本发明采用的层间绝缘层采用绝缘线线绕结构，能够降低变压器绕组的温升，其中采用的绝缘线具有耐高温和低温，电绝缘性好的优点，此外还具有良好的机械韧性。
(3)本发明采用的单层绝缘膜具有优异的耐热老化、耐高温性能，使用寿命长。
附图说明
图1为本发明结构示意图；
图2为本发明层间绝缘层结构示意图。
图中：变压器铁芯1、初级绕组2、次级绕组3、层间绝缘层4、外部绝缘层5、绝缘线6、单层绝缘膜7。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“设置有”、“连接”等，应做广义理解，例如“连接”，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
请参阅图1-2，本发明提供一种技术方案：一种绝缘线结构医用隔离变压器,包括变压器铁芯1、初级绕组2、次级绕组3和层间绝缘层4，所述初级绕组2绕制在变压器铁芯1外侧，所述层间绝缘层4设置在初级绕组2外侧，所述次级绕组3绕在层间绝缘层4外侧，所述次级绕组3外侧包覆外部绝缘层5。
本发明中，层间绝缘层4采用绝缘线6线绕结构，所述绝缘线6包括铜芯层、第一绝缘层和第二绝缘层，所述第一绝缘层采用乙烯-四氟乙烯共聚物、聚四氟乙烯混合制成；所述第二绝缘层采用聚对苯二甲酸乙二醇酯、聚四氟乙烯混合制成，层间绝缘层4中绝缘线绕制20-150圈，本发明采用的层间绝缘层采用绝缘线线绕结构，能够降低变压器绕组的温升，其中采用的绝缘线具有耐高温和低温，电绝缘性好的优点，此外还具有良好的机械韧性。
实施例一：
层间绝缘层4与次级绕组3之间设置单层绝缘膜7，所述单层绝缘膜7组份按重量份数包括40份PET树脂、10份二异氰酸酯、4份多亚甲基多苯基异氰酸酯、2份松香季戊四醇酯、1份季戊四醇磷酸酯、2份聚乙烯醇缩甲醛纤维、3份聚四氟乙烯。
实施例二：
层间绝缘层4与次级绕组3之间设置单层绝缘膜7，所述单层绝缘膜7组份按重量份数包括50份PET树脂、20份二异氰酸酯、10份多亚甲基多苯基异氰酸酯、6份松香季戊四醇酯、3份季戊四醇磷酸酯、8份聚乙烯醇缩甲醛纤维、9份聚四氟乙烯。
实施例三：
层间绝缘层4与次级绕组3之间设置单层绝缘膜7，所述单层绝缘膜7组份按重量份数包括45份PET树脂、15份二异氰酸酯、7份多亚甲基多苯基异氰酸酯、4份松香季戊四醇酯、2份季戊四醇磷酸酯、5份聚乙烯醇缩甲醛纤维、6份聚四氟乙烯。
本发明采用的单层绝缘膜具有优异的耐热老化、耐高温性能，使用寿命长。
此外，本发明中，外部绝缘层5由50％三元乙丙橡胶、20％煅烧陶土、20％白炭黑、10％聚丙烯增强纤维组成。本发明采用的外部绝缘层具有优异的阻燃、耐磨、耐高温、抗冲击的优点，有效的保护变压器。
综上所述，本发明结构设计新颖，完全避免初次级绕组之间产生寄生电容；而且变压器铁芯和初级绕组之间设置的层间绝缘层能够降低变压器绕组的温升；另外，本发明取消封闭式绝缘结构之后，降低了初级绕组温升，变压器效率提供，产品整体尺寸变小。
对于本领域技术人员而言，显然本发明不限于上述示范性实施例的细节，而且在不背离本发明的精神或基本特征的情况下，能够以其他的具体形式实现本发明。因此，无论从哪一点来看，均应将实施例看作是示范性的，而且是非限制性的，本发明的范围由所附权利要求而不是上述说明限定，因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。不应将权利要求中的任何附图标记视为限制所涉及的权利要求。

Claims (5)

1.一种绝缘线结构医用隔离变压器,包括变压器铁芯(1)、初级绕组(2)、次级绕组(3)和层间绝缘层(4)，其特征在于：所述初级绕组(2)绕制在变压器铁芯(1)外侧，所述层间绝缘层(4)设置在初级绕组(2)外侧，所述次级绕组(3)绕在层间绝缘层(4)外侧，所述次级绕组(3)外侧包覆外部绝缘层(5)。
2.根据权利要求1所述的一种绝缘线结构医用隔离变压器，其特征在于：所述层间绝缘层(4)采用绝缘线(6)线绕结构，所述绝缘线(6)包括铜芯层、第一绝缘层和第二绝缘层，所述第一绝缘层采用乙烯-四氟乙烯共聚物、聚四氟乙烯混合制成；所述第二绝缘层采用聚对苯二甲酸乙二醇酯、聚四氟乙烯混合制成。
3.根据权利要求1所述的一种绝缘线结构医用隔离变压器，其特征在于：所述层间绝缘层(4)与次级绕组(3)之间设置单层绝缘膜(7)，所述单层绝缘膜(7)组份按重量份数包括40-50份PET树脂、10-20份二异氰酸酯、4-10份多亚甲基多苯基异氰酸酯、2-6份松香季戊四醇酯、1-3份季戊四醇磷酸酯、2-8份聚乙烯醇缩甲醛纤维、3-9份聚四氟乙烯。
4.根据权利要求1所述的一种绝缘线结构医用隔离变压器，其特征在于：所述外部绝缘层(5)由50％三元乙丙橡胶、20％煅烧陶土、20％白炭黑、10％聚丙烯增强纤维组成。
5.根据权利要求2所述的一种绝缘线结构医用隔离变压器，其特征在于：所述层间绝缘层(4)中绝缘线绕制20-150圈。
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CN115116739A (zh) * 2022-08-12 2022-09-27 杭州裕正电子有限公司 一种新能源汽车变压器组件及扩展方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115116739A (zh) * 2022-08-12 2022-09-27 杭州裕正电子有限公司 一种新能源汽车变压器组件及扩展方法
CN115116739B (zh) * 2022-08-12 2023-06-16 杭州裕正电子有限公司 一种新能源汽车变压器组件及扩展方法

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