KR101692714B1 - Magnetic contactor driven permament magnet and two-coil - Google Patents

Magnetic contactor driven permament magnet and two-coil Download PDF

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Publication number
KR101692714B1
KR101692714B1 KR1020150083526A KR20150083526A KR101692714B1 KR 101692714 B1 KR101692714 B1 KR 101692714B1 KR 1020150083526 A KR1020150083526 A KR 1020150083526A KR 20150083526 A KR20150083526 A KR 20150083526A KR 101692714 B1 KR101692714 B1 KR 101692714B1
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KR
South Korea
Prior art keywords
permanent magnet
coil
iron core
load
power source
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KR1020150083526A
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Korean (ko)
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KR20160147180A (en
Inventor
유수홍
Original Assignee
(주)대홍엔지니어링
주식회사 대홍전기
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Priority to KR1020150083526A priority Critical patent/KR101692714B1/en
Publication of KR20160147180A publication Critical patent/KR20160147180A/en
Application granted granted Critical
Publication of KR101692714B1 publication Critical patent/KR101692714B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
    • H01H47/12—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for biasing the electromagnet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)

Abstract

The present invention is not limited to the use of a coil driving capacitor by operating a coil by using an external power source to drive the movable contact to simplify the structure of the coil and to prevent malfunction of the electromagnetic contactor due to failure of the capacitor. To an electromagnetic contactor driven by a permanent magnet.

Description

[0001] The present invention relates to a magnetic contactor driven permanent magnet and two-coil magnetic contactor driven by two coils and a permanent magnet,

More particularly, the present invention relates to an electromagnetic contactor, and more particularly, to an electromagnetic contactor that operates a coil by a control power source during closing, drives a movable contactor, uses a switch to shut down a control power to minimize power consumption, The present invention relates to an electromagnetic contactor driven by two coils and permanent magnets which can open contacts using a separate external power source and a spring.

Generally, an electromagnetic contactor is a device that causes an operating body to open and close a circuit, and is used for controlling various switching devices such as a motor, a welding machine, and a transformer.

The conventional electromagnetic contactor typically includes a fixed contact connected to a power source side and a load side, a fixed contact connected to one side of the fixed contacts, And when a current is applied to the coil of the electromagnet, a magnetic force is generated, and the movable contact moves to the fixed contacts, and the fixed contacts are brought into contact with each other by the movable contact to make electrical connection (input). In this state, when the current flowing through the coil is cut off, the magnetic force extinguishes in the fixed iron core, and the movable iron core is pushed by the repulsive force of the spring to return to the original position. As a result, the movable contactor, The connection between the fixed contacts is disconnected (opened).

Such a conventional electromagnetic contactor requires a constant current to be applied to the coil to keep the contact state of the contactor after the closing operation. As a result, they were susceptible to heat, vibration, noise, high power consumption, and momentary power failure.

Patent literatures 4 and 5 are techniques developed to overcome such disadvantages.

Patent Literatures 4 and 5 are permanent magnet type electromagnetic contactors. As shown in Fig. 4, permanent magnets 200 are provided on the rod 100r of the movable contactor 100m, And includes an input coil 400 and an open coil 500. When the power supply is applied to the input coil 400, the permanent magnet is pulled to move the movable contact to contact the fixed terminal 100f to connect the two fixed contacts. When the two fixed contacts are connected, the power supplied to the input coil is cut off The permanent magnets are fixed to the fixed iron core by the magnetic force of the permanent magnets, so that the two fixed contacts maintain the connection state by the movable contacts.

Conversely, when the movable contact is separated from the two fixed contacts, when power is supplied to the open coil 500, the permanent magnet 200 is pushed out to separate the permanent magnet from the fixed core 300 and the movable contact 100m The two fixed contacts 100f are disconnected from the two fixed contacts 100f by the jamming so that the two fixed contacts 100f are electrically disconnected from each other.

As shown in FIG. 5, the conventional permanent magnet type electromagnetic contactor includes switches S1 and S2 for interrupting power supplied to the input coil and the open coil, respectively, and supplies power to the open coil A capacitor C is provided.

That is, at the time of charging, the switch S1 is turned on and the switch S2 is turned off to apply the constant power source to operate the charging coil Lc and charge the capacitor C, and when the switch S1 is open, the switch S1 is turned off The switch S2 is turned on to operate the open coil Lo using the power stored in the capacitor C charged in the closing operation.

However, since the capacitor element provided for driving the open coil has a limited life span and is greatly influenced by the external environment, the actual electric-related industrial site may become a harsh environment such as heat or moisture. In such a circumstance, There is a problem that the control circuit having the element frequently fails and the electromagnetic contactor can not normally operate.

1. Korean Patent Registration No. 0333935 2. Korean Patent Publication No. 1985-0006963 3. Korean Patent Registration No. 0025834 4. Korean Patent Registration No. 0899432 5. Korea Patent No. 1274340

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electromagnetic contactor that is driven by two coils and permanent magnets that are less influenced by the environment by simplifying the configuration of the control circuit to reduce the failure rate, .

Further, the coils are operated using an external power source, and switching means is provided to switch the direction of the current so that two coils are installed on one iron core to contact and open the contacts, and the coils are driven by permanent magnets And an electromagnetic contactor.

According to an aspect of the present invention, there is provided an electromagnetic contactor driven by two coils and a permanent magnet,
A load side fixed contact 10r connected to the load;
A power source side fixed contact 10e connected to a commercial power source;
A movable contact 20 for connecting or disconnecting the load side fixed contact 10r and the power source side fixed contact 10e;
A rod 20r connected to the movable contact 20;
A housing 30h connected to and coupled to the rod 20r and having a permanent magnet 30 mounted thereon;
An iron core 40m provided on the lower side of the permanent magnet 30 with an interval therebetween;
An input coil 40c wound on an outer circumferential surface of the iron core 40m to magnetize the end of the iron core 40m toward the permanent magnet to have a polarity opposite to that of the permanent magnet when external power is supplied;
Is wound on the lower outer circumferential surface of the iron core 40c in the direction opposite to the winding direction of the charging coil 40c and when the external power is supplied, the end of the iron core 40m toward the permanent magnet is magnetized to have the same polarity as the permanent magnet Coil 40o;
A spring 60 installed between the permanent magnet 30 and the iron core 40m to maintain a gap between the permanent magnet 30 and the iron core 40m; And
And is disconnected from the lower surface of the housing 30h and is operated when the lower surface of the housing 30h is contacted or released from the housing 30h to cut off the external power supplied to the input coil 40c or the opening coil 40o Switches 50c and 50o,
When the commercial power is supplied to the load, an external power source is supplied to the input coil 40c to attach the end of the iron core 40m and the permanent magnet 30 to the movable contact 20 (interlocking with the permanent magnet 30) Side fixed contact 10r and the power source side fixed contact 10e to supply the commercial power to the load while at the same time bringing the lower portion of the housing 30h and the switch 50c into contact with each other, Off operation of the external power source supplied to the input coil 40c,
An external power source is supplied to the open coil 40o to disconnect the end of the iron core 40m from the permanent magnet 30 so that the movable contact 20 (interlocking with the permanent magnet 30) And the power supply side fixed contact 10e is disconnected to shut off the supply of the commercial power to the load and at the same time the contact between the lower portion of the housing 30h and the switch 50o is released, And the external power supply to the open coil 40o is cut off by the operation of the open coil 40o,
It is the adhesion force between the permanent magnet 30 and the iron core 40m to maintain the supply of the commercial power to the load even if the external power is cut off to the input coil 40c when the commercial power is supplied to the load,
And is characterized in that it is a tension force of the spring to maintain the cutoff of the commercial power supply to the load even if the external power is cut off to the open coil 40o when the commercial power is cut off to the load.

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The external power source may be a commercial power source or a battery.

As described above, the electromagnetic contactor driven by the two coils and the permanent magnet according to the present invention restricts the driving of the movable contactor by using the permanent magnet, so that a separate power source is supplied Not only can the driving of the electromagnetic contactor be stably controlled but also an external power source is used as a power source for driving the coils so that a charging circuit such as a capacitor is not provided inside the electromagnetic contactor, It is possible to prevent a malfunction due to the external environment of the battery or the aging of the charging circuit, and to reduce the occurrence of a failure.

1 is a configuration diagram of an electromagnetic contactor driven by two coils and a permanent magnet according to the present invention;
2 is an example of a coil power supply switching circuit constituting an electromagnetic contactor driven by two coils and a permanent magnet according to the present invention
3 is a cross-sectional view of an example of an electromagnetic contactor driven by two coils and a permanent magnet according to the present invention
4 is a cross-sectional view of one example of a conventional electromagnetic contactor
5 is a circuit diagram of a conventional electromagnetic contactor driving circuit

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for like elements in describing each drawing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention has a permanent magnet so as not to supply power when the power is turned on or off. The permanent magnet can be pushed or pulled by only one iron core, and the coil can be operated using an external power source, A charging circuit such as a capacitor is not provided to simplify the configuration of the electromagnetic contactor, reduce the cause of failure, and be less influenced by the environment.

The electromagnetic contactor driven by two coils and permanent magnets according to the present invention includes a load side fixed contact 10r connected to a load, a power source side fixed contact 10e connected to a commercial power source, A permanent magnet 30 provided on a rod 20r extending from the movable contact 30 and an input coil 20 which interacts with the permanent magnet 30 to move the movable contact 20, An open coil 40c and an open coil 40o.

The electromagnetic contactor is magnetized by supplying an external power source to the coils 40c and 40o to generate a magnetic field and pulls or pushes the permanent magnet 30 according to the polarity of the generated magnetic field, The movable contact 20 is brought into contact with or separated from the load side fixed contact 10r and the power source side fixed contact 10e so that the commercial power is supplied to or blocked from the load.

That is, in order to connect the load side fixed contact 10r and the power source side fixed contact 10e so as to supply power to the load, an external power source is supplied to the input coil 40c so that the end of the iron core 40m, which faces the permanent magnet, So that the permanent magnet is pulled toward the iron core. When the rod 20r provided with the movable contactor 20 is pulled by the pulling of the permanent magnet, both ends of the movable contactor are brought into contact with the respective load side fixed contacts 10r, The fixed points 10r and 10e are brought into contact with the power source side fixed contact 10e and electrically connected to each other.

On the contrary, when the power supplied to the load is cut off, the external power is supplied to the open coil 40o so that the end of the iron core 40m toward the permanent magnet becomes the same polarity as that of the permanent magnet, When the rod 20r provided with the movable contact 20 is pushed by the pivoting of the permanent magnet in this manner, both ends of the movable contact are separated from the respective load side fixed contacts 10r and the power source side fixed contacts 10e and fixed The increasing points 10r and 10e are disconnected.

When the permanent magnet 30 is brought into contact with the iron core 40m magnetized by the charging coil 40c during the operation of the electromagnetic contactor as described above, the movable contactor 20 contacts the two fixed contacts 10r and 10e So that the permanent magnet in contact with the iron core remains in contact with the iron core 40m due to its own magnetic force. Therefore, even when the power supplied to the coil is cut off, .

That is, after the power source is supplied to the charging coil 40c, the magnetic field generated from the iron core 40m is supplied only for a sufficient time to pull the permanent magnet 30, The contact between the movable contact 20 and the two fixed contacts 10r and 10e is maintained and power is supplied to the load.

On the contrary, in order to maintain the opened state of the electromagnetic contactor, the permanent magnet 30 must be prevented from moving to the iron core side, and the spring 60 is provided for this purpose.

3, the spring 60 is a compression spring which is provided between the permanent magnet and the iron core 40m and is elastically acting in a direction to push out the permanent magnet 30, The permanent magnet is prevented from being pulled toward the iron core 40m by the magnetic force of the permanent magnet 30 so that the movable contact 20 is kept separated by the two fixed contacts 10r and 10e.

The switches 50c and 50o are provided as means for interrupting the external power supplied to the input coil 40c and the open coil 40o.

The switch 50c of the switches 50c and 50o supplies power to the input coil 40c only when the switch 50c is closed and the switch 50o supplies power to the open coil 40o only when the switch 50o is opened. Supply. That is, it is preferable to use any one of the instantaneous values of the switches 50c and 50o to be instantaneously supplied with external power to the coils 40c and 40o only at the time when the input or the opening is started. If a normal switch is used, the external power is continuously supplied to the coils even after the permanent magnet is moved, thereby wasting unnecessary power.

The means for operating the switches 50c and 50o is a permanent magnet 30 as described above and one side of the housing 30h for fixing the permanent magnet is connected to the switches 50c and 50o, So that the switch is operated.

The external power source supplied to the coils 40c and 40o may be a commercial power source or a battery power source branched from a commercial power source line supplied to a load.

10r, 10e: fixed contact
20: Operational contact
30: permanent magnet
40c, 40o: coil 40m: iron core
50c, 50o: switch
60: spring

Claims (3)

A load side fixed contact 10r connected to the load;
A power source side fixed contact 10e connected to a commercial power source;
A movable contact 20 for connecting or disconnecting the load side fixed contact 10r and the power source side fixed contact 10e;
A rod 20r connected to the movable contact 20;
A housing 30h connected to and coupled to the rod 20r and having a permanent magnet 30 mounted thereon;
An iron core 40m provided on the lower side of the permanent magnet 30 with an interval therebetween;
An input coil 40c wound on an outer circumferential surface of the iron core 40m to magnetize the end of the iron core 40m toward the permanent magnet to have a polarity opposite to that of the permanent magnet when external power is supplied;
Is wound on the lower outer circumferential surface of the iron core 40m in the direction opposite to the winding direction of the charging coil 40c and is wound around the outer circumferential surface of the iron core 40m Coil 40o;
A spring 60 installed between the permanent magnet 30 and the iron core 40m to maintain a gap between the permanent magnet 30 and the iron core 40m; And
And is disconnected from the lower surface of the housing 30h and is operated when the lower surface of the housing 30h is contacted or released from the housing 30h to cut off the external power supplied to the input coil 40c or the opening coil 40o Switches 50c and 50o,
When the commercial power is supplied to the load, an external power source is supplied to the input coil 40c to attach the end of the iron core 40m and the permanent magnet 30 to the movable contact 20 (interlocking with the permanent magnet 30) Side fixed contact 10r and the power source side fixed contact 10e to supply the commercial power to the load while at the same time bringing the lower portion of the housing 30h and the switch 50c into contact with each other, Off operation of the external power source supplied to the input coil 40c,
An external power source is supplied to the open coil 40o to disconnect the end of the iron core 40m from the permanent magnet 30 so that the movable contact 20 interlocked with the permanent magnet 30 And the power supply side fixed contact 10e is disconnected to shut off the supply of the commercial power to the load and at the same time the contact between the lower portion of the housing 30h and the switch 50o is released, And the external power supply to the open coil 40o is cut off by the operation of the open coil 40o,
It is the adhesion force between the permanent magnet 30 and the iron core 40m to maintain the supply of the commercial power to the load even if the external power is cut off to the input coil 40c when the commercial power is supplied to the load,
The electromagnetic contactor is driven by two coils and a permanent magnet. The electromagnetic contactor is driven by two coils and a permanent magnet. The contactor maintains the load of the commercial power supply to the load even if the external power is cut off in the open coil.
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KR1020150083526A 2015-06-12 2015-06-12 Magnetic contactor driven permament magnet and two-coil KR101692714B1 (en)

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Application Number Priority Date Filing Date Title
KR1020150083526A KR101692714B1 (en) 2015-06-12 2015-06-12 Magnetic contactor driven permament magnet and two-coil

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KR101692714B1 true KR101692714B1 (en) 2017-01-18

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KR102417235B1 (en) * 2021-12-23 2022-07-05 박성삼 Power saving drive unit for circuit opening and closing

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100968462B1 (en) * 2010-01-07 2010-07-08 (주)에마텍 Electro magnetic actuator using permanent magnetics and driving apparatus with the same

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Publication number Priority date Publication date Assignee Title
JPS60205937A (en) 1984-03-29 1985-10-17 株式会社市右衛門商社 Electromagnetic contactor
US5677655A (en) 1994-08-09 1997-10-14 Fuji Electric Co., Ltd. Electromagnetic contactor with adjustment contact terminals
KR100899432B1 (en) 2008-09-02 2009-05-27 주식회사 케이디파워 An economy in power consumption type electromagnetic contactor
KR101274340B1 (en) 2008-12-24 2013-06-13 미쓰비시덴키 가부시키가이샤 Electromagnetic contactor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100968462B1 (en) * 2010-01-07 2010-07-08 (주)에마텍 Electro magnetic actuator using permanent magnetics and driving apparatus with the same

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