Miniaturized electromagnetic operating mechanism of low-voltage vacuum contactor
A technology of vacuum contactor and electromagnetic operation, which is applied in high-voltage air circuit breakers, high-voltage/high-current switches, circuits, etc., to achieve convenient processing and installation, reduce volume, and solve the effect of large closing current
Active Publication Date: 2020-04-10
GUIZHOU TIANYI ELECTRICAL +1
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Problems solved by technology
[0005] However, in some application scenarios, especially in the aerospace field, high requirements are placed on the volume and weight of the contactor, and the miniaturization of the vacuum contactor needs to be solved urgently
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[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0027] The miniaturized electromagnetic operating mechanism of the low-voltage vacuum contactor of the present invention, such as figure 1 As shown, it includes static iron core 1, guide rod bushing 2, magnetic sleeve 3, moving iron core bushing 4, moving iron core 5, guide rod 6, fixed pin 7, opening spring 8, coil skeleton 9, coil 10, permanent magnet 11. Top cover 12 and yoke 13.
[0028] The static iron core 1 and the moving iron core 5 are coaxially sleeved on the guide rod 6 from top to bottom. Among them, the static iron core is made of materials with superior magnetic properties such as electrical pure iron, which is a columnar structure and has a flat cylindrical base. Four threaded holes are designed at equiangular intervals on the circumference of the base, which are used to fix the electromagnetic operating mechanism on the shell or frame of the...
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The invention discloses a miniaturized electromagnetic operating mechanism of a low-voltage vacuum contactor, which is particularly suitable for low-voltage vacuum contactors and working occasions with volume requirements. The electromagnetic operating mechanism is characterized in that a permanent magnet auxiliary mechanism is additionally arranged on the upper portion of a traditional electromagnetic operating mechanism, and the size of the electromagnetic operating mechanism is greatly reduced while high matching of the attraction characteristic and the counter-force characteristic can be achieved. The electromagnetic operating mechanism is composed of a static iron core, a guide rod bushing, a magnetic sleeve, a movable iron core bushing, a movable iron core, a guide rod, a fixing pin,an opening spring, a coil framework, a coil, a permanent magnet, a top cover and a magnetic yoke. By reasonably designing the magnetic circuit of the permanent magnet, the force characteristic generated by the operating mechanism is consistent with the change trend of the self-closing force of the vacuum arc-extinguishing chamber and the force characteristic of the corrugated pipe along with thedisplacement, and a novel and ingenious method is provided for miniaturization of the contactor operating mechanism.
Description
technical field [0001] The invention relates to an electromagnetic operating mechanism, specifically, a miniaturized electromagnetic operating mechanism for a low-voltage vacuum contactor, especially suitable for a low-voltage vacuum contactor with volume requirements. Background technique [0002] The contactor is used to control the frequent opening and closing of the circuit, which is very important to the operation reliability of the power supply system. Compared with air contactors, vacuum contactors have the advantages of large breaking capacity, light weight, small size, high reliability, and frequent operation due to their arc extinguishing in a vacuum medium. They have been widely used in various power distribution systems. Applications. [0003] In order to ensure the service life, the free state of the bellows of the vacuum interrupter is often located in the closing position, and the bellows are compressed in the opening position, which produces a force that act...
Claims
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Login to View More IPC IPC(8): H01H33/666
CPCH01H33/666
Inventor 陈均夏尚文刘俊堂武建文袁洋程淼罗晓武佟子昂
Owner GUIZHOU TIANYI ELECTRICAL