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Arc-control device comprising controllable switch and arc-control method of direct-current mechanical switch

A technology of mechanical switches and arc extinguishing devices, which is applied in the direction of electric switches, electrical components, circuits, etc., can solve the problems of large size, inconvenient promotion and popularization of professional DC switches, and high price

Active Publication Date: 2013-09-25
BEIJING LIANDONG TIANYI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the disconnection process of the mechanical switch, due to the existence of current, the switch contacts often generate arcs when they are separated, thereby reducing the service life of the mechanical switch; and, when the arc is severe, the switch contacts will be directly burned, and even the fire
Therefore, in order to reduce the arc phenomenon and improve the service life of the DC switch, in the prior art, people need to use a professional DC switch. However, the professional DC switch has the disadvantages of being expensive and bulky, which makes it inconvenient to popularize the professional DC switch.

Method used

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  • Arc-control device comprising controllable switch and arc-control method of direct-current mechanical switch
  • Arc-control device comprising controllable switch and arc-control method of direct-current mechanical switch
  • Arc-control device comprising controllable switch and arc-control method of direct-current mechanical switch

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: The DC mechanical switch is installed on the positive line side of the DC power supply line

[0035] Such as figure 1 As shown, it is a circuit diagram, in which K represents a DC mechanical switch, and RC in parallel forms an absorption circuit; the switch K2 and the control circuit together form a controllable switch, and the one-way conduction or two-way conduction state of K2 is controlled by the control circuit. figure 1 , the one-way conduction state of the controllable switch is: the one-way conduction state from 1 to 2.

[0036] Such as figure 2 As shown, it is another circuit diagram, which is the same as figure 1 The difference is that the installation position of the controllable switch is slightly different, and the one-way conduction state of the controllable switch is still: one-way conduction state from 1 to 2.

Embodiment 2

[0037] Embodiment 2: The DC mechanical switch is installed on the negative line side of the DC power supply line

[0038] image 3 and Figure 4 Circuit diagram for two types of DC mechanical switches installed on the negative side. The meanings of the symbols are the same as those in Embodiment 1, and will not be repeated here.

Embodiment 3

[0039] Embodiment 3: DC mechanical switches are respectively installed on the positive line side and the negative line side of the DC power supply line

[0040] Specifically, such as Figure 5 As shown, the DC mechanical switch includes a first DC mechanical switch K1 and a second DC mechanical switch K3; the first DC mechanical switch K1 is installed on the positive line side of the DC power supply line, and the second DC mechanical switch K3 is installed on the DC power supply line negative line side.

[0041]The absorbing circuit 1 and the controllable switch 1 are connected in parallel at both ends of the first DC mechanical switch K1, and the absorbing circuit 2 and the controllable switch 2 are connected in parallel at both ends of the second DC mechanical switch K3. Among them, the installation method of the absorption circuit 1 and the controllable switch 1 and figure 1 or figure 2 Same, the installation method of absorbing circuit 2 and controllable switch 2 and ...

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Abstract

The invention provides an arc-control device comprising a controllable switch and an arc-control method of a direct-current mechanical switch. The arc-control device comprises absorption circuits, the controllable switch and the direct-current mechanical switch. The direct-current mechanical switch is mounted on a direct-current power supply line, the absorption circuits are mounted at the two ends of the direct-current mechanical switch in parallel, the controllable switch is connected between the direct-current mechanical switch and the absorption circuit in series, and the absorption circuits are RC circuits which are connected in parallel. The controllable switch is composed of a control circuit and a controllable MOS pipe connected with the control circuit, or the controllable switch is composed of a control circuit and an IGBT connected with the control circuit. The absorption circuits are connected to the two ends of the conventional direct-current mechanical switch in parallel, the controllable switch is used for controlling the timing sequence of the absorption circuit, so that energy generated when the direct-current mechanical switch is off is absorbed, the arc discharge phenomenon in the switch-off process of the direct-current mechanical switch can be avoided, and therefore the service life of the direct-current mechanical switch is prolonged.

Description

technical field [0001] The invention relates to an arc extinguishing device, in particular to an arc extinguishing device and an arc extinguishing method for a DC mechanical switch including a controllable switch. Background technique [0002] DC power supplies, such as storage batteries, are widely used in various fields of people's production and life, and are used to supply power to loads such as various instruments, meters, and lighting equipment. [0003] In a DC power supply line composed of a DC power supply and a load, a mechanical switch is usually used to control the on-off of the power supply line. However, during the disconnection process of the mechanical switch, due to the existence of current, the switch contacts often generate arcs when they are separated, thereby reducing the service life of the mechanical switch; and, when the arc is severe, the switch contacts will be directly burned, and even fire. Therefore, in order to reduce the arc phenomenon and im...

Claims

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Application Information

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IPC IPC(8): H01H9/30
Inventor 唐建华
Owner BEIJING LIANDONG TIANYI TECH
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