Direct current electromagnet
A DC electromagnet and iron core technology, applied in the field of DC electromagnets, can solve the problems of inability to meet the requirements of long-term continuous work and can not work continuously for a long time, achieve large working tension, ensure strength and waterproofness, and increase working tension. Effect
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[0030] Such as figure 1 , figure 2 As shown, the DC electromagnet in one embodiment of the present invention includes a coil 3, an iron core 4 sleeved in the coil, a return spring 5 sleeved at one end of the iron core and a position-limiting rear seat 6, the coil 3, the iron core Core 4, return spring 5 and limit rear seat 6 are coaxially arranged, and it is characterized in that, DC electromagnet also includes closed shell and relay switch 7, as image 3 As shown, the coil 3 includes a first coil 31 and a second coil 32, the normally closed contact 71 of the relay switch 7 is connected to both ends of the second coil 32, and the first coil 31 and the second coil 32 are connected through a thermal protector 33 .
[0031] The DC electromagnet in this embodiment adopts two groups of coils to provide a large working tension; the two groups of coils are connected through a thermal protector 33, so that the DC electromagnet can work safely for a long time in a high-temperature w...
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