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1. 发明授权

US06396383B1 Protective element 失效
标题翻译：保护元件
公开(公告)号：US06396383B1
公开(公告)日：2002-05-28
申请号：US09208479
申请日：1998-12-10
申请人： Joachim Glatz-Reichenbach , Felix Greuter , Ruzica Loitzl-Jelenic , Jörgen Skindhoj , Ralf Strümpler
发明人： Joachim Glatz-Reichenbach , Felix Greuter , Ruzica Loitzl-Jelenic , Jörgen Skindhoj , Ralf Strümpler
IPC分类号： H01C710
CPC分类号： H01C7/13 , H01C7/027
摘要： A protective element for protecting in particular an electric motor against overload currents includes in a polymer matrix, preferably ETFE, for example 40% (by volume) of a first powdered filler of a conductive material, preferably TiB2, so that, as in the case of a PTC element, the resistance increases abruptly at a switching temperature corresponding to the melting temperature of the polymer. Also added are 20% (by volume) of a second powdered filler, a phase transition material which, at a critical temperature below the switching temperature, undergoes a phase transition in which it absorbs heat of transformation. As a result, the response time (T) of the protective element is notably extended in a range of the overload current factor (F) corresponding to higher permissible motor starting currents. Examples of materials which come into consideration for the second filler are those with a solid-solid phase transition such as pentaerythritol, NaNO2, NaNO3 or else with a solid-liquid phase transition such as UHMWPE, quinol or, in particular, microencapsulated metals, alloys and salts.
摘要翻译：用于特别保护电动机以防止过载电流的保护元件包括在聚合物基质中，优选为ETFE，例如40％（体积）的导电材料的第一粉末填料，优选为TiB 2，因此，如在这种情况下的PTC元件，电阻在对应于聚合物的熔融温度的开关温度下突然增加。还加入20％（体积）第二粉末填料，相转变材料，其在低于开关温度的临界温度下经历相变，其吸收转化热。结果，保护元件的响应时间（T）在对应于更高允许电动机起动电流的过载电流因数（F）的范围内显着延伸。考虑到第二填料的材料的实例是具有固 - 固相变的物质，例如季戊四醇，NaNO 2，NaNO 3或具有固 - 液相变如UHMWPE，喹啉或特别是微胶囊金属合金和盐。

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