A bidirectional magnetic field enhanced magnetic blowing device
An enhanced, magnetic field technology, applied in the electrical field, can solve the problems of the DC contactor with large difference in the forward and reverse breaking performance of the magnetic blowing system, etc. Effect
Active Publication Date: 2020-01-14
BEIHANG UNIV
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Problems solved by technology
[0004] In order to solve the problem of large difference in forward and reverse breaking performance of existing DC contactors and enhance the blowing effect of the magnetic blowing system, the present invention proposes a magnetic blowing device that re-arranges the permanent magnet materials, so that the DC contactor The performance of breaking and extinguishing arc is more reliable, and it has the ability of two-way arc magnetic blowing
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[0015] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.
[0016] The invention provides a two-way magnetic field enhanced magnetic blowing device, such as Figure 1A , 1B and figure 2 As shown, the magnetic blowing device includes an upper end cover 1 of the arc extinguishing chamber, an annular magnetic passage 2, an arc extinguishing grid 3, a fixed static contact 4, two permanent magnets 5 symmetrically arranged left and right, and a magnetic field enhanced magnetic block 6. Two magnetic field enhancing magnets 7 symmetrically arranged left and right, two replaceable magnetic guide blocks 8 arranged symmetrically left and right, and arc-shaped buckles 9 .
[0017] In the magnetic blowing device, the annular magnetic passage 2 is fixed on the upper end cover 1 of the arc extinguishing chamber through two arc-shaped buckles 9. The shape of the annular magnetic passage 2 is two parallel sections and a midd...
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Abstract
The invention discloses a bidirectional magnetic field enhanced magnetic blowing device, belongs to the field of electrical appliances, and is especially suitable for direct current contactors. The magnetic blowing device comprises an arc extinguishing chamber upper end cover, an annular magnetic passage, arc extinguishing grid pieces, fixed static contacts, permanent magnets, a magnetic field enhancement magnetic conduction block, magnetic field enhancement magnets, replaceable magnetic conduction blocks and arc-shaped buckles. The annular magnetic passage is fixed to the arc extinguishing chamber upper end cover through the two arc-shaped buckles, and a group of arc extinguishing grid pieces is fixed to the inner sides of two parallel sections of the annular magnetic passage correspondingly. The permanent magnets and the replaceable magnetic conduction blocks are fixed to symmetrical positions of two sides of on two arc connecting sections of the annular magnetic passage. The magnetic field enhancement magnetic conduction block is arranged between the two fixed static contacts, and the magnetic field enhancement magnets are separately fixed to two sides, facing the static contacts, of the magnetic field enhancement magnetic conduction block. The bidirectional magnetic field enhanced magnetic blowing device can realize the magnetic blowing arc extinguishing function of a bidirectional magnetic field, and the bidirectional breaking performance is consistent. When a direct-current contactor is used, the current flow direction is not considered.
Description
technical field [0001] The invention belongs to the field of electrical appliances, and in particular relates to a two-way magnetic field enhanced magnetic blowing device. Background technique [0002] When the contacts of the DC contactor are separated, an arc will be generated in the contact gap due to high voltage and high current. The particularity of the DC arc makes the principle and method of extinguishing the DC arc completely different from the AC arc. Among them, the main method used in the forced arc extinguishing method is to use an external magnetic field to enhance the moving speed of the arc, which is referred to as magnetic blowing. [0003] At present, most of the DC contactors on the market use permanent magnets to extinguish the arc generated when the contactor is broken, so as to achieve the purpose of completely disconnecting the load. However, due to the layout of its permanent magnets, the arc generated under forward current can be stretched in the op...
Claims
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IPC IPC(8): H01H50/38
CPCH01H50/38
Inventor 武建文贾博文孙凡雯蒋原
Owner BEIHANG UNIV