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Large-current rapid mechanical switch structure and control method thereof

A mechanical switch and control method technology, applied in the direction of the power device inside the switch, etc., can solve the problems of the elastic collision between the electromagnetic repulsion mechanism and the permanent magnet operating mechanism, the reduction of the opening speed of the combined mechanism, and the reduction of the volume of the driving capacitor, etc. Reverse force, reduce elastic collision, improve stability effect

Pending Publication Date: 2021-11-02
山东泰开直流技术有限公司 +1
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Problems solved by technology

[0007] In order to overcome the above-mentioned shortcoming, the object of the present invention is to provide a kind of control method based on the high-current fast mechanical switch of electromagnetic repulsion and permanent magnet operation combined mechanism, this control method can solve the problem of the reduction of the opening speed of the combination mechanism and the combination of electromagnetic repulsion mechanism and permanent magnet. The problem of elastic collision of the operating mechanism, and can greatly reduce the voltage of the driving capacitor and reduce the volume of the driving capacitor

Method used

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  • Large-current rapid mechanical switch structure and control method thereof
  • Large-current rapid mechanical switch structure and control method thereof
  • Large-current rapid mechanical switch structure and control method thereof

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Embodiment Construction

[0025] In order to clearly illustrate the technical features of the solution, the solution will be described below through specific implementation modes.

[0026] A high-current fast mechanical switching structure, such as figure 1 As shown, it includes a vacuum interrupter, a monostable permanent magnet operating mechanism and a double-coil electromagnetic repulsion mechanism. The vacuum interrupter includes a static contact 1 and a moving contact 2 .

[0027] The monostable permanent magnet operating mechanism includes a moving guide rod 4 with a boss, an opening spring 5, a contact spring 6, a permanent magnet 7, a static iron core 8, a slow opening and closing coil 9, and a moving iron core 10 And moving iron core opening limit plate 11. The moving guide rod 4 passes through the hollow part of the static iron core 8, and the static iron core 8 has a built-in slow opening and closing coil 9 through an insulating annular groove, and the permanent magnet 7 is located above ...

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Abstract

The invention relates to a large-current rapid mechanical switch structure. The rapid mechanical switch structure comprises a vacuum arc-extinguishing chamber, a monostable permanent magnet operating mechanism and a double-coil electromagnetic repulsion mechanism. During opening, the opening coil of the electromagnetic repulsion mechanism and the operating coil of the permanent magnet operating mechanism act at the same time, so that the closing retention force provided by the permanent magnet during opening is reduced as much as possible, the opening time is shortened, the reverse acting force generated by quick compression of a contact spring during opening is reduced, the elastic collision between the electromagnetic repulsion mechanism and the switching-on holding mechanism is reduced, and the stability in the switching-off process is improved.

Description

technical field [0001] The invention relates to the technical field of flexible DC power distribution, in particular to a high-current fast mechanical switch structure and a control method thereof. Background technique [0002] With the large-scale access of distributed energy and energy storage devices, the rapid development of power electronics technology and large-capacity power transmission, power distribution based on flexible DC systems is an important development direction in the future, especially in some specific occasions. Such as large-scale ship power supply system, urban rail transit power supply system and other DC systems have made great progress. In a large-capacity DC power grid, it is necessary to apply a DC circuit breaker that breaks a large current within 2-3ms to quickly remove the faulty equipment or line to ensure the stable operation of the non-faulty part of the DC system. [0003] The DC vacuum circuit breaker based on the hybrid type is an import...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H3/22H01H3/28
CPCH01H3/28H01H3/22
Inventor 刘博刘凯李伟张志成肖风良沈晓松罗光荣
Owner 山东泰开直流技术有限公司
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