JPH05258655A - Switch - Google Patents

Abstract

PURPOSE:To perform high-speed switching with a small size and a light weight by providing a magnetic coil so that a contact consisting of a conductive magnetic material forms a part of a magnetic circuit. CONSTITUTION:Contacts 1A, 2A are formed on a part of fixed electrodes 1, 2 consisting of good conductive magnetic material, and two contacts 3A, 3B are formed on a part of a movable electrode 3 so that they are opposed to the contacts 1A, 2A. The electrode 3 is partly rotated with a support point 3C as a center to bring one contact 3A into contact with the contact 1A of one electrode 1, or bring the contact 3B into contact with the contact 2A of the electrode 2. The contacts 1A, 2A, 3A, 3B are provided in a sealed vessel vacuumed or filled with an inert gas. Outside the vessel 4, the other part of the electrode 1 and the other part of the electrode 3 are situated in the inside of one drive coil 5 in the state where they are electrically insulated to each other, and the coil 5 is driven to form a magnetic circuit by one electrode 1 and the electrode 3, and the contact 3A is attracted by the contact 1A by electromagnetic action.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch, and more particularly to a switch applicable as a switch for alternating current or direct current power.

[0002]

SUMMARY OF THE INVENTION According to the present invention, in order to realize high-speed switching, an electromagnet for driving a contact is eliminated, and instead, the contact itself is made of a conductive magnetic material so that an electric / magnetic circuit can be shared and movable. It is a switching device that reduces the moment of inertia of the part,
Further, the switching unit including the main contactor is a switcher in which the contact opening distance of the contactor is shortened by enclosing a vacuum or an insulating gas.

As an application of the present invention, when opening and closing in the air, a low resistance electrode such as a carbon electrode is installed at the center of the contact or the like, and a two-stage switching operation is performed to reduce the generation of arc. The present invention can be applied to auxiliary relays, electromagnetic switches, MCCBs, etc., and it can be expected that the advantages of downsizing and speeding up of control circuits can be widely used.

[0004]

2. Description of the Related Art For example, electromagnetic switching devices are widely used not only for power sources for broadcasting but also for general industrial purposes such as power reception / power generation switching and rotation control of electric motors. Since the child and the electromagnet are separate, the moment of inertia of the moving part is large. Further, in order to obtain the current interruption performance, the opening distance is long and the arc-extinguishing grid (Deion Gri) is used.
d).

[0005]

Therefore, in the conventional electromagnetic switching device, the switching operation time is required to be 50 to 200 ms, and the instantaneous power failure during this time has a great adverse effect on the load of, for example, computers and broadcasting equipment. Get out.

Regarding the shape and size, there are limits to miniaturization because there are originally parts such as electromagnets and arc-extinguishing grids that are originally unrelated to the main circuit.

[0007] In addition, the current type electromagnetic switching device is several hundred meters for switching.
(a) The actual load switching test during in-house test operation is limited to the night after the end of broadcasting because it is accompanied by a momentary power failure of s.

(B) In the commercial switching after the power failure is recovered, it is necessary to wait until the timing when the influence on the program is small and to switch the commercial.

(C) In the uninterruptible power supply (UPS) and its power distribution system, it is necessary to add an expensive synchronous control device in order to switch the backup commercial power supply for UPS failure and maintenance without interruption. There is.

(D) There is a problem that switching cannot be performed in a normal state in a distribution board without the same device.

An object of the present invention is to provide a switching device which solves the above problems.

[0012]

To achieve the above object, the present invention comprises a contact made of a conductive magnetic material and an electromagnetic coil provided so that the contact forms a part of a magnetic circuit. It is characterized by

[0013]

According to the present invention, the electromagnetic circuit is shared by the contacts, the moment of inertia of the movable part is reduced, and the contacts are sealed with a vacuum or an insulating gas as necessary to open the contact. The distance is shortened.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a switching device according to an embodiment of the present invention.

In FIG. 1, 1 and 2 are fixed electrodes and 3
Is a movable electrode, and these are made of a magnetic material with good conductivity (eg FeNi alloy). Two fixed electrodes 1 and 2
Contacts 1A, 2A are formed on a part of the movable electrode 3, and two contacts 3A, 3B are formed on a part of the movable electrode 3 so as to face the contacts 1A, 2A. Some of them rotate around the fulcrum 3C and one of the contactors 3A comes into contact with the contactor 1A of the one fixed electrode 1, or the other contactor 3B contacts the contactor 2A of the other fixed electrode 2. Contact. Further, these contacts 1A, 2A, 3A, 3B are provided in a sealed container 4 filled with an inert gas such as vacuum or SF ₆ gas. Outside the sealed container 4, the other part of the one fixed electrode 1 and the other part of the movable electrode 3 are located inside the one drive coil 5 in a state of being electrically insulated. By driving the coil 5, a magnetic circuit is formed by the fixed electrode 1 and the movable electrode 3 on one side, and the contactor 3A is attracted to the contactor 1A by the electromagnet action. The other part of the other fixed electrode 2 and the other part of the movable electrode 3 are located inside the other drive coil 6 while being electrically insulated from each other, and a magnetic circuit is formed in the same manner. The contactor 3B is attracted to the contactor 2A. The two fixed electrodes 1 and 2 have input terminals 1B and 2B, and the movable electrode 3 has a switching output terminal 3D. For example, input terminal 1
B and 2B are connected to separate electrode outputs, and output terminal 3
D is connected to either of these power sources.

According to the above configuration, when one coil 5 is driven, the contactor 3A comes into contact with the contactor 1A,
One input terminal 1B and the switching output terminal 3D are connected.
When the other coil 6 is driven, the other input terminal 2B is similarly connected to the switching output terminal 3D. Since this switching device has a small moment of inertia of the movable part and a short distance between the facing contacts, it can operate at high speed (for example, switching operation time can be about 10 ms). It is possible to effectively implement non-interruptible switching for computers and computers. When this switching device is applied to power supply switching, the required number of switching devices may be arranged and packaged according to the number of phases of the power supply, and the phases may be connected to each other so that they operate simultaneously. It is also possible to add about two auxiliary contacts that interlock with the operation of the contactor for sequence control.

[0017]

As described above, according to the present invention,
It is possible to provide a switcher that is small, lightweight, and capable of high-speed switching.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an exemplary embodiment of the present invention.

[Explanation of symbols]

 1, 2 fixed electrodes 1A, 2A, 3A, 3B contactor 3 movable electrode 4 hermetically sealed container 5, 6 drive coil

Claims (2)

[Claims] 1. A switching device comprising a contact made of a conductive magnetic material and an electromagnetic coil provided so that the contact forms a part of a magnetic circuit. 2. The switching device according to claim 1, wherein the contactor is filled with a vacuum or an insulating gas.