KR20140017922A - Power saving magnetic contactor - Google Patents

Abstract

The present invention relates to a power saving type electromagnetic contactor. The power saving type electromagnetic contactor includes: a power input unit which applies power corresponding to an on or off signal from the outside; a first solenoid in which a coil is connected to the power input unit; a valve which is connected serially between the coil of the first solenoid and the power input unit; a first plunger which is arranged in the center of the first solenoid and operates by the magnetic field induction of the first solenoid; an opening and closing switch is comprised of a fixed contactor which is installed and fixated on a housing and a movable contactor which is installed and fixated on the lateral side of the first plunger and operates depending on the operation of the first plunger; a second solenoid; a second plunger which is arranged in the center of the second solenoid and controls the operation of the valve by being operated by the induction magnetic field of the second solenoid; and an off-circuit part which is connected to the power input unit and controls power which is applied in the second solenoid. The power saving type electromagnetic contactor according to the present invention is able to minimize waiting power consumption by preventing power from being delivered to the first solenoid because the first plunger turns off the valve while turning on the opening and closing switch if power is applied in the power input unit.

Description

Power saving magnetic contactor

The present invention relates to a power-saving magnetic contactor, and more particularly, not only has the same input / output terminal as a conventional electronic switch, but also does not consume power for maintaining the turn-on state of the switch. The present invention relates to a power-saving electronic contactor that can be controlled in the same manner as an operation signal of a conventional contactor without additional use, and can be 1: 1 replaced with an existing electronic switch without structural change of the existing distribution box.

Electromagnetic switch is a device that opens or closes the flow of electricity using an electromagnet, and is an electronic contactor used in various industries. The existing magnetic contactor controls the flow of electricity by using an electromagnet, and standby power is not consumed in the OFF state, but standby power is consumed to maintain the electromagnet continuously operated in the ON state. There is a problem.

Various methods have been proposed to solve this problem. "Power-saving electronic switchgear" of the Republic of Korea Patent No. 10-424668 has a guide hole penetrated vertically from the upper surface and a through hole connected to the guide hole in one side in the fixed iron core, the guide at the bottom of the moving iron core The guide rod is inserted in correspondence with the hole and has a fixed hole formed at the end thereof. . The energy-saving electronic switchgear disclosed in the above-described patent must reverse the fixed bar to release the lock state, and additional control signals for reversing the fixed bar must be provided from the outside. In this case, in order to use the above-described electronic switchgear, a problem arises in that the control signal of the central control device or the central distribution box in which the electronic switchgear is mounted is changed.

Korea Patent Registration No. 10-424668

An object of the present invention for solving the above problems is to develop a new structure that does not need to apply power to the solenoid in order to maintain the turn-on state of the switch, power-saving magnetic contactor with almost no standby power consumption even in the turn-on state of the switch To provide.

Another feature of the present invention is to provide a power-saving electronic contactor that can replace a conventional electronic switch 1: 1 without a distribution box for controlling the operation of the electronic contactor, a structural change of a control device, or a change of a control method.

Another feature of the present invention further includes a test driver, so that the operation of the switching switch can be checked without applying a current to the solenoid during the inspection and maintenance of the equipment or the distribution panel, the failure check of the contactor, and the operation of the equipment.

According to an aspect of the present invention, a power-saving electronic contactor includes: a power input unit to which a power corresponding to an on or off signal is applied; A first solenoid having a coil connected to the power input unit; A valve connected in series between the coil of the first solenoid and the power input unit; A first plunger disposed at the center of the first solenoid and operating according to the induced magnetic field of the first solenoid; An opening / closing switch comprising a fixed contact fixedly mounted to a housing and a movable contact fixedly mounted to a side of the first plunger, the open / close switch being driven according to the operation of the first plunger; Second solenoid; A second plunger disposed at the center of the second solenoid and operated according to the induced magnetic field of the second solenoid to control the driving of the valve; A blocking circuit unit connected to the power input unit to control power applied to the second solenoid; When the power is applied to the power input unit, the on / off switch is turned on and the first plunger turns off the valve so that power is not supplied to the first solenoid.

In the energy-saving electromagnetic contactor according to the above features, the first end of the first plunger is mounted to the housing via a first spring, the second end has a first protrusion having a locking jaw on the side, When the induced magnetic field is generated by the solenoid, the first plunger is pulled by the first solenoid to turn off the valve, and the locking projection of the first protrusion fixes the turned off valve to maintain the turn-off state of the valve. It is preferable to make it.

In the energy-saving magnetic contactor according to the above feature, the first end of the second plunger is mounted to the housing via a second spring, and the second end has a V-shaped second protrusion, and is provided on the second solenoid. When an induced magnetic field is generated, a second plunger is pulled into the second solenoid so that the second protrusion turns off the valve, and at the same time, the first protrusion escapes from the valve and returns to its original position.

In the energy-saving electromagnetic contactor according to the above feature, the valve is fixed to the housing via a valve spring, and the valve is preferably turned off by the first plunger or the second plunger.

In the energy-saving magnetic contactor according to the above features, the power-saving magnetic contactor further comprises a test driver for manually turning on and off the switch,

The test driver may include a push button; And a rod fixed at one end to the push button via a push spring and the other end to reach the valve. When the push button is pressed, the on / off switch is turned on and the valve is turned off by the rod. .

In the energy-saving magnetic contactor according to the above features, the cut-off circuit unit is connected in parallel with the power input unit rectifying circuit unit for converting and outputting the AC power supplied from the power input unit to the DC power; A charging unit for charging power provided from the rectifying circuit unit; A switch connected between the charging unit and a coil of the second solenoid; And a sensing controller configured to detect whether power is applied to the power input unit, turn on a switch if power is not applied to the power input unit, and turn off the switch when power is applied to the power input unit. When power is not applied to the power input unit, it is preferable to provide the power charged in the charging unit to the second solenoid.

The power-saving magnetic contactor according to the present invention, when the power corresponding to the drive signal is input, the on-off switch maintains the turn-on state, but almost no standby power consumption, thereby having a power saving effect.

In addition, the energy-saving magnetic contactor according to the present invention is provided with a test drive unit to turn on and off the switch manually and at the same time turn off the valve so that the power is not applied to the first solenoid, thereby checking and repairing equipment and distribution boards, You can check contactor breakdown and equipment operation.

In addition, the energy-saving electronic contactor according to the present invention, since the input and output terminals are the same as the input and output terminals of the conventional electronic switchgear and does not need a separate control signal for contact release, it can be used in place of the conventional electronic switchgear that was used in general. have.

1 is a schematic exploded perspective view of main components of a power-saving electronic contactor according to a preferred embodiment of the present invention.
Figure 2 shows the initial state, the switched on state, the switched off state, the passive driving state in the circuit diagram of the energy-saving electronic contactor according to the present invention, respectively.
3 is a cross-sectional view in an initial state of a power-saving electromagnetic contactor according to a preferred embodiment of the present invention (a) shows the operation of the first plunger and the valve (b) shows the operation of the second plunger and the valve It is shown.
4 is a perspective view illustrating the state of the valve, the first plunger and the second plunger in the initial state of the energy-saving electromagnetic contactor according to the preferred embodiment of the present invention.
Figure 5 is a cross-sectional view in the switched-on state of the power-saving electromagnetic contactor according to a preferred embodiment of the present invention (a) shows the operation of the first plunger and the valve (b) is operation of the second plunger and the valve It is shown.
6 is a perspective view illustrating a state of a valve, a first plunger and a second plunger in a switched-on state of a power-saving electromagnetic contactor according to a preferred embodiment of the present invention.
7 is a cross-sectional view in a switched off state of a power-saving electromagnetic contactor according to a preferred embodiment of the present invention, where (a) shows the operation of the first plunger and the valve and (b) shows the operation of the second plunger and the valve. It is shown.
8 is a perspective view illustrating a state of a valve, a first plunger and a second plunger in a switched-off state of a power-saving electromagnetic contactor according to a preferred embodiment of the present invention.
9 is a cross-sectional view in a manual driving state for testing a power-saving magnetic contactor according to a preferred embodiment of the present invention, where (a) shows the operation of the rod, the first plunger and the valve and (b) the second The operation of the plunger and the valve is shown.

Hereinafter, with reference to the accompanying drawings will be described in detail the structure and operation of the energy-saving electronic contactor according to an embodiment of the present invention. The energy-saving magnetic contactor according to the present invention is characterized in that the switch can be turned off manually as well as minimizing standby power consumption in the switched-on state.

1 is a schematic exploded perspective view of main components of a power saving electronic contactor according to a preferred embodiment of the present invention, and FIG. 2 is a schematic circuit diagram of the power saving electronic contactor.

1 and 2, a power saving magnetic contactor 1 according to a preferred embodiment of the present invention includes a power input unit 102, a center of a first solenoid 100 and a first solenoid to which power is applied from a power input unit. A first plunger 110 disposed to penetrate the through hole, an opening / closing switch 120 to be turned on / off according to the movement of the first plunger, a second solenoid 130, and a second solenoid disposed to penetrate the center of the second solenoid The second plunger 140, the valve 150 connected in series between the first solenoid and the power input unit, the blocking circuit unit 160 and the test driver 170 connected in parallel to the power input unit to supply power to the second solenoid. It is provided. Each component described above is explained in full detail.

The power input units 102 are terminals to which power is applied corresponding to an on or off signal from the outside, and applies power to the coil of the first solenoid 100.

The first solenoid 100 is a solenoid for turning on and off the switch 120, one end of the coil of the first solenoid is connected to the power input, the other end is connected to the power input via the valve 150. Therefore, when power is applied from the power input, when the valve is turned on, current flows to the coil of the first solenoid to generate an induction magnetic field. If the valve is turned off, current does not flow to the coil of the first solenoid, thereby inducing the magnetic field. Will not be created.

The first plunger 110 is a movable iron core penetrating the center of the first solenoid, the first end portion is formed with a first protrusion 114 having a locking jaw at the side surface, and interposing the first spring 112. Is fixed to the housing. When the induced magnetic field is generated by the first solenoid, the first plunger is pulled to the first solenoid by the induced magnetic field. As a result, the first protrusion 114 of the first plunger 110 passes through the valve to turn off the valve, and then the locking projection of the first protrusion is fixed to the edge of the lower surface of the valve, thereby turning the valve off. Will be maintained.

The on-off switch 120 is composed of a movable contact 122 and a fixed contact 124, the movable contact 122 is fixedly mounted on the side of the first plunger 110, the fixed contact 124 of the housing It is fixedly mounted in a predetermined area. The movable contact moves with the first plunger as the first plunger moves. Therefore, when the first plunger moves by the induction magnetic field caused by the first solenoid, the movable contactor also moves to come into contact with the fixed contactor, and as a result, the open / close switch is turned on. On the other hand, if power is not applied to the first solenoid, the first plunger is returned to its original position by the first spring, and as a result, the movable contact is separated from the fixed contact, and the open / close switch is turned off.

The second solenoid 130 is a blocking solenoid, and the coil of the second solenoid is connected to the blocking circuit unit 160, and power is applied from the blocking circuit unit.

The second plunger 140 is a movable iron core that penetrates the center of the second solenoid and the valve, and a second protrusion 144 having a V shape is formed at a first end thereof and is opposed to the first end. The end portion is fixed to a predetermined region of the housing via the second spring 142. The second protrusion 144 of the second plunger 140 is disposed to be exposed to the upper surface of the valve, at which time the valve is turned on. On the other hand, when the induced magnetic field generated by the second solenoid is generated, the second plunger is pulled by the second solenoid, and the valve is turned off as the V-shaped second protrusion pushes the valve bodies to both sides. do.

The valve 150 includes two bodies 152 disposed to face each other, contact terminals 154 mounted on the first surfaces of the bodies facing each other, and a second surface opposite to the first surfaces of the respective bodies. And valve springs 156 connected to each other, the components of the valve may all be made of an electrically conductive material, or only the contact terminals may be made of an electrically conductive material when the contact terminals are directly connected with other circuit elements. The valve 150 is electrically connected in series between the power input and the coil of the second solenoid, and is structurally disposed between the first solenoid and the second solenoid. That is, one end of the valve is connected to the coil of the first solenoid, the other end of the valve is connected to the power input. The second plunger is disposed through the valve, the second protrusion being arranged to expose the upper surface of the valve.

The valve having the above-described configuration maintains the turn-off state as the first protrusion of the first plunger is pushed in and fixed by the locking jaw, and is already fixed when the second protrusion of the second plunger pushes the valve in both directions. The first plunger exits the valve and returns to its original position.

The blocking circuit unit 160 includes a rectifying circuit unit 162 connected in parallel with a power input unit, a charging unit 164 connected in parallel with an output terminal of the rectifying circuit unit, a switch 166 connected between the charging unit and a coil of the second solenoid, The sensing controller 168 controls the operation of the switch according to the current flow of the power input unit. The blocking circuit having the above-described configuration provides the power charged to the charging unit to the coil of the second solenoid when the power is not applied to the power input unit. Hereinafter, each component of the blocking circuit unit will be described in detail.

The rectifier circuit unit 162 is connected in parallel to the power input unit, and converts AC power provided from the power input unit into DC power to provide the charging unit 164.

The charging unit 164 may be fast-charged at the moment when power is supplied from the rectifier circuit unit, it is preferably composed of a high voltage capacitor having a rated voltage of 250 ~ 350 Volt.

The sensing controller 168 may include a photo coupler including a light emitting element connected in parallel with an output terminal of a power input unit and a light receiving element for detecting light from the light emitting element. One end of the light receiving element is connected to the output terminal and the switch of the rectifier circuit portion and the other end is grounded. Accordingly, when power is applied to the power input unit, the light emitting device emits light. Accordingly, the light receiving device causes a current to flow to provide the current of the rectifier circuit part to the ground through the light receiving device, and the switch is turned off. On the other hand, when power is not applied to the power input unit, the light receiving element does not flow current, and the current of the rectifier circuit part is provided to the switch, so that the switch is turned on. When the switch is turned on, power of the charging unit is provided to the coil of the second solenoid.

The switch 166 may be composed of a switching element such as an SCR, a control terminal of the switching element is connected to an output terminal of the light receiving element, and an input / output terminal of the switching element is connected in series between the charging unit and the coil of the second solenoid. do.

The test driver 170 includes a push button 172, a rod 174, and a push spring 176. The push button is a button that can be pressed from the outside.

The rod 174 is disposed between the push button and the second protrusion of the second plunger. One end of the rod is secured to the push button via a push spring, and the other end is configured to contact the second protrusion exposed on the upper surface of the valve. In particular, it is preferable that the first plunger forms a through hole in the center along the longitudinal direction, and the rod is disposed in the through hole formed in the center of the first plunger. When the push button is pressed, the first plunger is moved to turn on and off the switch, and the rod is pushed on the second protrusion to open the valve bodies to both sides so that the valve is turned off.

<Description of operation>

Hereinafter, the operation of the energy-saving magnetic contactor according to the preferred embodiment of the present invention having the above-described structure will be described in detail.

Unpowered initial state ( Initial status )

2, 3 and 4, in the power saving type electronic switch according to the present invention, an initial state in which power is not applied to the power input unit for a predetermined time will be described. Figure 2 (b) shows the initial state in the circuit diagram of the energy-saving electromagnetic contactor according to the present invention, Figure 3 is a cross-sectional view in the initial state (a) shows the operation of the first plunger and the valve ( b) shows the operation of the second plunger and the valve. 4 is a perspective view for explaining the state of the valve, the first plunger and the second plunger in the initial state.

In an initial state in which power is not applied to the power input unit for a predetermined time or more, power is not applied to the first solenoid, and the first plunger is fixed to the housing side via the first spring.

As a result, the movable contact and the fixed contact of the open / close switch 120 maintain the turn-off state.

Since there is no charged power even in the charging unit providing power to the second solenoid, no power is applied to the second solenoid, and the second protrusion of the second plunger remains completely exposed to the upper surface of the valve, The contacts of the valve module remain turned on.

 Switch-on state ( Switch ON Status )

2, 5 and 6, the switch-on state at the moment when the power corresponding to the drive signal is input to the power input unit in the power-saving magnetic contactor according to the present invention. 2 (c) shows a switched-on state in a circuit diagram of a power-saving magnetic contactor according to the present invention, Figure 5 is a cross-sectional view in the switched-on state (a) shows the operation of the first plunger and the valve. And (b) shows the operation of the second plunger and the valve. FIG. 6 is a perspective view illustrating the state of a valve, a first plunger and a second plunger in a switched-on state.

When power is input to the power input unit, power is supplied to the first solenoid to generate an induction magnetic field, and the first plunger is pulled to the first solenoid by the induced magnetic field of the first solenoid. As the first plunger moves, the movable contact and the fixed contact of the open / close switch 120 are turned on.

The first protrusion of the first plunger passes through the valve so that the locking jaw of the first protrusion is fixed to the valve, and as a result, the valve remains turned off.

At this time, the rectifier circuit of the blocking circuit unit converts AC power input to the power input unit into DC power to charge the charging unit, and when the power input is detected, the detection controller turns off the switch connected to the second solenoid to supply power to the second solenoid. Not authorized

Since no power is applied to the second solenoid, the V-shaped second projection of the second plunger remains in its initial state completely exposed to the upper surface of the valve.

As described above, when the power-saving magnetic contactor according to the present invention is powered on the power input unit in the switched-on state, even if the open / close switch is continuously turned on, the first solenoid and the second solenoid do not supply power. As a result, power consumption by the first solenoid does not occur even in the switched-on state. Therefore, the power-saving magnetic contactor according to the present invention can save power since there is almost no standby power consumption even in the switched-on state.

switch off  condition( Switch OFF Status )

2, 7 and 8, in the power-saving magnetic contactor according to the present invention, a switch-off state at the moment when power is input to the power input unit will be described. Figure 2 (d) shows a switch-off state in the circuit diagram of the power-saving magnetic contactor according to the present invention, Figure 7 is a cross-sectional view in the switch-off state (a) shows the operation of the first plunger and the valve. And (b) shows the operation of the second plunger and the valve. FIG. 8 is a perspective view illustrating a state of a valve, a first plunger and a second plunger in a switched off state.

When no power is input to the power input unit, the sensing control unit of the blocking circuit unit turns on the switch element connected to the second solenoid when the power input unit detects no power input, and applies the charged power of the charging unit to the second solenoid.

As the power is applied to the second solenoid, an induction magnetic field is generated, and the second plunger is attracted to the second solenoid by the induction magnetic field of the second solenoid. As a result, as the V-shaped second protrusion of the second plunger pushes the valve to both sides to open each other, the first plunger fixed to the valve is returned to the original position by the first spring.

As the first plunger returns to its original position, the movable contact of the open / close switch 120 is moved and as a result the open / close switch is turned off.

When all the power charged in the live parts is discharged, the power is not applied to the second solenoid. As a result, the second plunger is returned to the original position by the second spring, and the V-shaped second protrusion is positioned at the position where the second module passes through the valve module. By being disposed, the contacts of the valve module are turned on.

Manual drive state ( Manual Mode )

2 and 9, a process of manually turning on / off the switch using a push button in a state in which power is not input to the power input unit in the power-saving magnetic contactor according to the present invention will be described. Figure 2 (e) shows a passive operating state in the circuit diagram of the energy-saving magnetic contactor according to the present invention, Figure 9 is a cross-sectional view in the manual operating state (a) shows the operation of the rod, the first plunger and the valve (B) shows the operation of the second plunger and the valve.

In the initial state in which power is not input to the power input unit, when the push button is manually pressed, the first plunger is moved by the push button to turn on the on / off switch, and the rod connected to the push button via the push spring is connected to the second plug. Push the V-shaped protrusion of the launcher.

As the V-shaped second protrusion of the second plunger is pushed by the rod, it opens between the bodies of the valve and the valve is turned off.

When the push button is released, the push button returns to the original position, the first plunger returns to the original position by the first spring, and the on / off switch is turned off, and the rod is also returned to the original position by the push spring. The second plunger is also returned to its original position by the second spring, and the valve is turned on.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that various changes and modifications may be made without departing from the spirit and scope of the invention. And differences relating to such modifications and applications should be construed as being included in the scope of the invention as defined in the appended claims.

The energy-saving electronic contactor according to the present invention can be widely used in all fields in which a conventional electronic switchgear is used. In particular, once a turn-on signal is applied, such as a street lamp distribution box, it is used in a field where the turn-on state is to be maintained for a long time to obtain a power saving effect.

1: energy-saving electronic contactor
100: first solenoid
110: first plunger
120: open and close switch
130: second solenoid
140: second plunger
150: valve
160: circuit breaker
170: test drive unit
172: push button
176: push spring
174 bar

Claims (7)

A power input unit to which power corresponding to an on or off signal is applied from the outside;
A first solenoid having a coil connected to the power input unit;
A valve connected in series between the coil of the first solenoid and the power input unit;
A first plunger disposed at the center of the first solenoid and operating according to the induced magnetic field of the first solenoid;
An opening / closing switch comprising a fixed contact fixedly mounted to a housing and a movable contact fixedly mounted to a side of the first plunger, the open / close switch being driven according to the operation of the first plunger;
Second solenoid;
A second plunger disposed at the center of the second solenoid and operated according to the induced magnetic field of the second solenoid to control the driving of the valve;
A blocking circuit unit connected to the power input unit to control power applied to the second solenoid;
And an open / close switch is turned on when power is applied to the power input unit, and the first plunger turns off the valve so that power is not supplied to the first solenoid. According to claim 1, The first end of the first plunger is mounted to the housing via a first spring, the second end has a first protrusion having a locking jaw formed on the side,
When the induced magnetic field generated by the first solenoid is generated, the first plunger is pulled by the first solenoid to turn off the valve, and the locking projection of the first protrusion fixes the turned off valve to thereby turn off the valve. Power-saving electronic contactor, characterized in that the holding. The method of claim 1, wherein the first end of the second plunger is mounted to the housing via a second spring, the second end has a V-shaped second protrusion,
When an induced magnetic field caused by the second solenoid is generated, a second plunger is pulled into the second solenoid so that the second projection turns off the valve and the first projection exits the valve and returns to its original position. Power-saving electronic contactor. The energy-saving magnetic contactor of claim 1, wherein the valve is fixed to the housing via a valve spring, and the valve is turned off by a first plunger or a second plunger. According to claim 1, The energy-saving electronic contactor further comprises a test driver for manually turning on and off the switch,
The test drive unit,
Push button; And
One end is fixed to the push button via a push spring and the other end is a rod for contacting the valve;
When the push button is pressed, the on-off switch is turned on and the rod turns off the valve. The method of claim 5, wherein the first plunger has a through hole formed between the push button and the valve,
And the rod is disposed in the through hole of the first plunger. The method of claim 1, wherein the blocking circuit unit,
A rectifier circuit unit connected in parallel to the power input unit to convert AC power provided from the power input unit into DC power and output the DC power;
A charging unit for charging power provided from the rectifying circuit unit;
A switch connected between the charging unit and a coil of the second solenoid;
A sensing controller which senses whether power is applied to the power input unit, turns on a switch if power is not applied to the power input unit, and turns off the switch when power is applied to the power input unit;
And the cut-off circuit unit provides power charged to the charging unit to the second solenoid when the power is not applied to the power input unit.

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