This paper discusses the application of PTC element in the starting of direct current electromagnet according to the working principle of electromagnet and the current time relation of PTC.
本文根据电磁铁的工作原理和PTC元件的电流时间特性，探讨了PTC元件在直流电磁铁启动中的应用。
This paper shows a review to PTC Asia 2003 and underlines the prospective and direction of fluid power and mechanical transmission.
本文对2003亚洲国际动力传动与控制技术展览会进行了评述，同时阐述了流体传动及机械传动技术的进展和动向。
This paper briefs the working principle of the PTC starter used in refrigeration compressors and analys the factors of effect of the constructual elements on the devices.
简述了制冷压缩机用PTC起动器的工作原理，对PTC起动器中结构元件对起动器的影响因素作了初步分析。
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