CN114975005A - Electromagnetic relay and control method - Google Patents
Electromagnetic relay and control method Download PDFInfo
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- CN114975005A CN114975005A CN202111317692.9A CN202111317692A CN114975005A CN 114975005 A CN114975005 A CN 114975005A CN 202111317692 A CN202111317692 A CN 202111317692A CN 114975005 A CN114975005 A CN 114975005A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H45/00—Details of relays
- H01H45/02—Bases; Casings; Covers
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Switch Cases, Indication, And Locking (AREA)
Abstract
An electromagnetic relay and a control method belong to the field of relays, and are used for converting alternating current into direct current through a rectifier bridge and keeping the magnetic pole direction of a coil fixed in order to solve the problems of water resistance and dust accumulation; the coil is electrified to excite a magnetic field, the direction of the magnetic field excited by the coil is opposite to the inherent magnetic field direction of the magnet column, so that the coil and the magnet column are mutually repelled, the magnet column descends, and the magnet column drives the pushing device to push the waterproof capsule downwards when descending so as to enable the movable contact piece to deflect downwards and be in contact conduction with the static contact piece; after the coil is powered off, the magnetic field excited by the coil disappears, the magnet column loses downward power, the magnetic field excited by the magnet column temporarily magnetizes the iron column, the magnetization direction of the iron column is the same as that of the magnetic field of the magnet column, so that the iron column and the magnet column are mutually attracted, the magnet column moves upwards, and when the magnet column moves upwards, the pushing device is upwards far away from the waterproof capsule to separate the movable contact piece from the static contact piece, so that the effects of water prevention, dust prevention, electric leakage prevention and explosion prevention are achieved.
Description
Technical Field
The invention belongs to the field of relays, and relates to a waterproof electromagnetic relay and a control method.
Background
A relay is an electrically controlled device that causes a controlled amount to undergo a predetermined step change in an electrical output circuit. It is an automatic switch which uses small current to control large current operation. The circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like. At present, the relay has poor waterproof performance, particularly, the relay contact is easy to accumulate dust besides poor waterproof performance, so that micro-current is caused, even the relay contact is conducted mistakenly and the like. Further, the relay operating mechanism is not compact or complicated in its interior.
Disclosure of Invention
In order to solve the problems of water resistance and dust accumulation and further solve the problems of electric leakage and explosion, the invention provides the following technical scheme: a control method of an electromagnetic relay includes the steps of:
converting alternating current into direct current through a rectifier bridge, and keeping the magnetic pole direction of the coil fixed;
the coil is electrified to excite a magnetic field, the direction of the magnetic field excited by the coil is opposite to the inherent magnetic field direction of the magnet column, so that the coil and the magnet column are mutually repelled, the magnet column descends, and the magnet column drives the pushing device to push the waterproof capsule downwards when descending so as to enable the movable contact piece to deflect downwards and be in contact conduction with the static contact piece;
after the coil is powered off, the magnetic field excited by the coil disappears, the magnet column loses downward power, the magnetic field excited by the magnet column temporarily magnetizes the iron column, the magnetization direction of the iron column is the same as that of the magnetic field of the magnet column, so that the iron column and the magnet column are mutually attracted, the magnet column moves upwards, and when the magnet column moves upwards, the pushing device is upwards far away from the waterproof capsule so as to separate the movable contact piece from the static contact piece.
As a supplement to the technical scheme, after the coil is electrified, the excitation magnetic field magnetizes the iron columns simultaneously, the magnetization direction of the iron columns is the same as that of the coil magnetic field and opposite to that of the magnetic field excited by the magnet columns, so that the iron columns and the magnet columns are mutually repelled, and meanwhile, the magnet columns are promoted to descend.
As a supplement to the technical solution, the electromagnetic relay includes a coil, a magnet post, a pushing device, a pulling-back device and a waterproof capsule, the coil is sealed in a coil housing formed by injection molding, the magnet post is in a central hole of the coil, and the pulling-back device is fixed by the coil, the magnet post is located below the pulling-back device, the lower part of the magnet post is connected with the pushing device, the pushing device penetrates through an opening on a bottom plate of the coil housing and is vertically opposite to a movable contact of the waterproof capsule located outside the coil housing, the waterproof capsule includes a capsule base and a waterproof rubber sleeve fixed on the capsule base, the movable contact and the static contact are arranged inside the waterproof rubber sleeve, the movable contact and the static contact are fixed on the capsule base, and the movable contact is located above the static contact.
As a supplement to the technical solution, the coil, the magnet post and the pushing device are located inside the coil housing, the coil housing is adapted to the shape of the coil to fix the coil inside the coil housing, and the outer periphery of the magnet post forms the housing by injection molding.
As the supplement of the technical scheme, the pushing device comprises a connecting column, a panel and a pushing column, wherein the lower part of the magnet column is connected with the connecting column, the connecting column penetrates through a hole in the coil shell and is connected with the panel, a plurality of pushing columns are distributed on the lower surface of the panel, and the pushing columns are opposite to a movable contact piece of the waterproof capsule and are in contact with or separated from the waterproof capsule.
The utility model provides an electromagnetic relay, which comprises a coil, the magnet post, thrust unit, pull-back device and waterproof capsule, the coil is sealed wherein by the coil casing that the mode of moulding plastics formed, the magnet post is in the central hole of coil, and it is fixed for the coil to pull-back the device, the magnet post is located the below of pulling-back device, the sub-unit connection thrust unit of magnet post, thrust unit link up the trompil on the coil casing bottom plate, and relative from top to bottom with the movable contact piece that is located the outside waterproof capsule of coil casing, waterproof capsule includes capsule base and the waterproof gum cover of fixing on the capsule base, movable contact piece and static contact piece set up the inside at waterproof gum cover, movable contact piece and static contact piece are fixed on the capsule base, and the movable contact piece is located the static contact piece top.
Has the advantages that: the relay has the advantages that the waterproof performance of the relay is improved by coating the surfaces of the waterproof capsule and the coil by injection molding, particularly, the contact can be positioned in a completely closed space of the waterproof capsule, the waterproof performance is improved, the defect of dust accumulation is overcome, the phenomena of micro-current and wrong conduction are basically avoided, and the contact is positioned in the waterproof capsule and isolated from the outside, so that the leakage and explosion can be prevented. The waterproof capsule plays roles of water resistance, dust prevention, electricity leakage prevention and explosion prevention in the invention, and is used for realizing the purpose of ensuring the accurate action of the contact.
According to the invention, when the magnet column moves downwards, the pushing device is driven to push the waterproof capsule downwards to enable the movable contact piece to deflect downwards and to be in contact with the static contact piece for conduction, when the magnet column moves upwards, the pushing device is driven to move upwards to be away from the waterproof capsule to enable the movable contact piece to be separated from the static contact piece, through on-off control of the coil, and matching with the pull-back device, vertical movement and reset control of the magnet column are realized through double magnetic effects of the iron column and the electromagnetic coil or rebounding effects of the electromagnetic coil and a tension spring, so that contact conduction in the waterproof capsule can be realized through movement control. The synergy of the characteristic combination of the invention enables the invention to realize more comprehensive waterproof effect.
Drawings
Fig. 1 is a schematic diagram of an electromagnetic relay in embodiment 1.
Fig. 2 is a schematic diagram of an electromagnetic relay in embodiment 2.
Figure 3 is a schematic view of a waterproof capsule.
1. The magnetic coil comprises a coil, 2 magnet columns, 3 injection molding materials, 4 coil shells, 5 waterproof capsules, 6 connecting columns, 7 panels, 8 pushing columns, 9 iron columns, 10 tension springs, 11 rectifier bridges, 12 movable contacts, 13 static contacts and 14 pressure springs.
Detailed Description
Example 1: as shown in fig. 1, in an electromagnetic relay, a rectifier bridge 11 is connected between an ac power supply and a coil 1 of the electromagnetic relay to shape ac power into dc power for the coil 1, and since the direction of current is fixed, the direction of a magnetic field generated by energizing the coil is determined. The electromagnetic relay comprises a coil 1, wherein the surface of the coil 1 is coated by an injection molding material 3, the injection molding material 3 forms a coil shell 4, and the coil shell 4 is matched with the shape of the coil 1 to fix the coil 1 inside the coil shell 4. The magnet post 2 is a permanent magnet, and is formed as a housing by injection molding on the outer periphery of the magnet post 2 in the central hole of the coil 1. The iron column 9 is fixed by the coil 1, and the periphery of the iron column 9 forms a shell by injection molding. Magnet post 2 is located the below of iron prop 9, and 2 lower parts of magnet post link to each other with spliced pole 6, link up the trompil on coil housing 4 and be connected with panel 7 by spliced pole 6, 7 lower surfaces of panel distribute a plurality of promotion posts 8, coil 1, magnet post 2 and part spliced pole 6 seal inside coil housing 4, panel 7 with promote the post 8 and be located coil housing 4 outsidely. The bottom plate of the coil shell 4 is provided with an opening through which the connecting column 6 passes, and the connecting column vertically moves in the opening of the bottom plate. As shown in figure 3, the waterproof capsule 5 comprises a capsule base and a waterproof rubber sleeve fixed on the capsule base, a movable contact piece 12 and a static contact piece 13 form the capsule base through an injection molding mode and are arranged inside the waterproof rubber sleeve, the movable contact piece 12 and the static contact piece 13 are fixed on the capsule base, the movable contact piece 12 is positioned above the static contact piece 13, the movable contact piece 12 and the static contact piece 13 are fixed on the capsule base and are led out by being coated by the capsule base, and the leading-out ends are connected with corresponding wiring ends. An insulating elastic member is provided between the movable contact piece 12 and the fixed contact piece 13 for assisting and correcting deformation and springback of the movable contact piece 12 and the fixed contact piece 13, contacts are provided on both the movable contact piece 12 and the fixed contact piece 13, and the movable contact piece 12 and the fixed contact piece 13 are configured to contact each other by means of the respective contacts. The pushing column 8 is opposite to the movable contact 12 of the waterproof capsule 5, the magnet column 2 is driven to move downwards when the coil 1 is electrified, and the magnet column 2 is driven to move upwards and reset by the upward force applied to the magnet column 2 by the iron column 9 when the coil 1 is powered off. When the magnet column 2 moves downwards, the pushing column 8 is driven to push the waterproof capsule 5 downwards to enable the movable contact piece 12 to deflect downwards to be in contact with and conducted with the static contact piece 13, and when the magnet column 2 moves upwards, the pushing device moves upwards to be far away from the waterproof capsule 5 to enable the movable contact piece 12 to be separated from the static contact piece 13.
In this embodiment, the rectifier bridge 11 converts alternating current into direct current, keeping the magnetic pole direction of the coil 1 fixed. In this embodiment, as shown in fig. 1, the upper end of the magnet post 2 is of the S-order and the lower end is of the N-order. After the coil 1 is electrified, a magnetic field is excited, the direction of the magnetic field excited by the coil 1 is opposite to the inherent direction of the magnetic field of the magnet column 2, so that the coil 1 and the magnet column 2 repel each other, and after the coil 1 is electrified, the magnetic field is excited to magnetize the iron column 9 at the same time, the direction of the magnetization of the iron column 9 is the same as the direction of the magnetic field of the coil 1 and is opposite to the direction of the magnetic field excited by the magnet column 2, so that the iron column 9 and the magnet column 2 repel each other, and the magnet column 2 moves downwards.
After the coil is powered off, the magnetic field excited by the coil disappears, the magnet column 2 loses the downward power, the magnetic field excited by the magnet column 2 temporarily magnetizes the iron column 9, the magnetization direction of the iron column 9 is the same as that of the magnetic field of the magnet column 2, the iron column 9 and the magnet column 2 attract each other, and the magnet column 2 moves upwards.
In this embodiment, for a plurality of contacts, i.e., a plurality of pairs of movable and static contacts, each pair of movable and static contact combination may be placed in a waterproof glue casing, i.e., one pair of contacts in a waterproof capsule, or, of course, a plurality of pairs of movable and static contacts may be placed in a waterproof glue casing, i.e., a plurality of contacts in a large waterproof capsule. The relay is a device for controlling strong current by weak current, and in the embodiment, the relay controls 4 pairs of contacts.
Example 2: as shown in fig. 2, in an electromagnetic relay, a rectifier bridge 11 is connected between an ac power source and a coil 1 of the electromagnetic relay to shape ac power into dc power for the coil 1, the electromagnetic relay includes the coil 1, the surface of the coil 1 is covered by an injection molding material 3, and a coil housing 4 is adapted to the shape of the coil 1 to fix the coil 1 inside the coil housing 4. The magnet post 2 is a permanent magnet, and is formed as a housing by injection molding on the outer periphery of the magnet post 2 in the central hole of the coil 1. The upper end of the tension spring 10 is connected with the coil shell 4 positioned above the magnet column 2, the lower end of the tension spring 10 is connected with the upper end of the magnet column 2, and the tension spring 10 applies upward elastic restoring force to the magnet column 2 when the coil 1 is powered off so as to enable the magnet column 2 to move upwards for resetting. Magnet post 2 lower part links to each other with spliced pole 6, link up the trompil on coil housing 4 and be connected with panel 7 by spliced pole 6, a plurality of promotion posts 8 of panel 7 lower surface distribution, coil 1, magnet post 2 and part spliced pole 6 be located coil housing 4 inside, panel 7 and promotion post 8 are located coil housing 4 outsidely. The bottom plate of the coil housing 4 is provided with an opening through which the connecting column 6 passes, and the outer peripheral surface of the connecting column 6 is in contact with the inner peripheral surface of the opening of the bottom plate when the connecting column moves vertically, and the contact does not cause sealing. As shown in figure 3, the waterproof capsule 5 comprises a capsule base and a waterproof rubber sleeve fixed on the capsule base, a movable contact piece 12 and a static contact piece 13 form the capsule base through an injection molding mode and are arranged inside the waterproof rubber sleeve, the movable contact piece 12 and the static contact piece 13 are fixed on the capsule base, the movable contact piece 12 is positioned above the static contact piece 13, the movable contact piece 12 and the static contact piece 13 are fixed on the capsule base and are led out by being coated by the capsule base, and the leading-out ends are connected with corresponding wiring ends. An insulating elastic member is provided between the movable contact piece 12 and the fixed contact piece 13 for assisting and correcting deformation and springback of the movable contact piece 12 and the fixed contact piece 13, contacts are provided on both the movable contact piece 12 and the fixed contact piece 13, and the movable contact piece 12 and the fixed contact piece 13 are configured to contact each other by means of the respective contacts. The pushing column 8 is opposite to the movable contact 12 of the waterproof capsule 5, the magnet column 2 is driven to move downwards when the coil 1 is electrified, and the tension spring 10 applies upward force to the magnet column 2 to enable the magnet column 2 to move upwards to reset when the coil 1 is powered off, namely the tension spring 10 applies upward spring tension to the magnet column 2 to enable the magnet column 2 to move upwards to reset when the coil 1 is powered off. When the magnet column 2 moves downwards, the pushing column 8 is driven to push the waterproof capsule 5 downwards to enable the movable contact piece 12 to deflect downwards to be in contact with and conducted with the static contact piece 13, and when the magnet column 2 moves upwards, the pushing device moves upwards to be far away from the waterproof capsule 5 to enable the movable contact piece 12 to be separated from the static contact piece 13.
In this embodiment, the rectifier bridge 11 converts alternating current into direct current, keeping the magnetic pole direction of the coil 1 fixed. In this embodiment, as shown in fig. 2, the upper end of the magnet column 2 is S-level and the lower end is N-level. After the coil 1 is electrified, a magnetic field is excited, the direction of the magnetic field excited by the coil 1 is opposite to the inherent direction of the magnetic field of the magnet column 2, so that the coil 1 and the magnet column 2 repel each other, and after the coil 1 is electrified, the magnetic field is excited to magnetize the iron column 9 at the same time, the direction of the magnetization of the iron column 9 is the same as the direction of the magnetic field of the coil 1 and is opposite to the direction of the magnetic field excited by the magnet column 2, so that the iron column 9 and the magnet column 2 repel each other, and the magnet column 2 moves downwards. The tension spring at the upper end of the housing is stretched downward by the downward movement of the magnet post 2. After the coil is powered off, the magnetic field excited by the coil disappears, the magnet column 2 loses the downward power, the elastic force of the tension spring acts on the magnet column 2, and the magnet column 2 moves upward.
In this embodiment, for a plurality of contacts, i.e., a plurality of pairs of movable and static contacts, each pair of movable and static contact combination may be placed in a waterproof glue casing, i.e., one pair of contacts in a waterproof capsule, or, of course, a plurality of pairs of movable and static contacts may be placed in a waterproof glue casing, i.e., a plurality of pairs of contacts in a large waterproof capsule.
Example 3: the difference from embodiment 2 is that the lower end of a compression spring 14 is connected to the coil housing 4 below the magnet post 2, the upper end of the compression spring 14 is connected to the lower end of the magnet post 2, and the compression spring 14 applies upward elastic restoring force to the magnet post 2 when the coil 1 is powered off to restore the magnet post 2 upward.
Example 4: the difference from the embodiment 2 is that the upper end of the tension spring 10 is connected to the coil housing 4 above the magnet post 2, the lower end of the tension spring 10 is connected to the upper end of the magnet post 2, and the tension spring 10 applies upward elastic restoring force to the magnet post 2 when the coil 1 is powered off to restore the magnet post 2 upward; and the lower end of the pressure spring 14 is connected to the coil housing 4 below the magnet post 2, the upper end of the pressure spring 14 is connected to the lower end of the magnet post 2, and the pressure spring 14 applies upward elastic restoring force to the magnet post 2 when the coil 1 is powered off to enable the magnet post 2 to move upwards for resetting.
Example 5: an electromagnetic relay comprises a coil 1, a magnet column 2, a pushing device, a pull-back device and a waterproof capsule 5, wherein the coil 1 is sealed in a coil shell 4 formed by injection molding, the magnet column 2 is arranged in a central hole of the coil 1 and is fixed by the coil 1, the magnet column 2 is positioned below the pull-back device, the coil 1 drives the magnet column 2 to descend when electrified and applies upward force to the magnet column 2 by the pull-back device when the coil 1 is powered off so as to enable the magnet column 2 to ascend and reset, the lower part of the magnet column 2 is connected with the pushing device which penetrates through an opening on a bottom plate of the coil shell 4 and is opposite to a movable contact 12 of the waterproof capsule 5 positioned outside the coil shell 4 up and down, the waterproof capsule 5 comprises a capsule base and a waterproof rubber sleeve fixed on the capsule base, the movable contact 12 and a static contact 13 are arranged inside the waterproof rubber sleeve, the movable contact 12 and the static contact 13 are fixed on the capsule base, and the movable contact piece 12 is positioned above the static contact piece 13, so that the pushing device is driven to push the waterproof capsule 5 downwards when the magnet column 2 moves downwards, the movable contact piece 12 is driven to deflect downwards to be in contact with the static contact piece 13 for conduction, and the pushing device is driven to move upwards to be far away from the waterproof capsule 5 when the magnet column 2 moves upwards, so that the movable contact piece 12 is separated from the static contact piece 13.
As a supplement to the technical solution, the capsule base is formed by injection molding. In addition to the technical solution, the coil 1, the magnet column 2 and the part of the pushing device not in contact with the waterproof capsule 5 are located inside the coil housing 4, the coil housing 4 is adapted to the shape of the coil 1 to fix the coil 1 inside the coil housing 4, and the outer periphery of the magnet column 2 is formed into the housing by injection molding. As a supplement of the technical scheme, the pushing device comprises a connecting column 6, a panel 7 and a pushing column 8, wherein the lower part of the magnet column 2 is connected with the connecting column 6, the connecting column 6 penetrates through the opening on the coil shell 4 and is connected with the panel 7, the lower surface of the panel 7 is distributed with a plurality of pushing columns 8, the pushing columns 8 are opposite to a movable contact 12 of the waterproof capsule 5 and are contacted or separated with or from the waterproof capsule 5 through the pushing columns 8. As a supplement to the above solution, the bottom plate of the coil housing 4 has an opening through which the connection post 6 passes, and the connection post 6 moves vertically in the opening of the bottom plate. The technical scheme is supplemented that the pull-back device is an iron column 9, the iron column 9 applies upward suction to the magnet column 2 when the coil 1 is powered off to enable the magnet column 2 to move upwards and reset, and the periphery of the iron column 9 forms a shell in an injection molding mode.
As a supplement to the technical solution, the electromagnetic relay retraction device is a tension spring 10, the upper end of the tension spring 10 is connected to the coil housing 4 located above the magnet post 2, the lower end of the tension spring 10 is connected to the upper end of the magnet post 2, and the tension spring 10 applies upward elastic restoring force to the magnet post 2 when the coil 1 is powered off, so that the magnet post 2 moves upward and resets.
As a supplement to the technical solution, the retraction device is a compression spring 14, the lower end of the compression spring 14 is connected to the coil housing 4 located below the magnet post 2, the upper end of the compression spring 14 is connected to the lower end of the magnet post 2, and the compression spring 14 applies upward elastic restoring force to the magnet post 2 when the coil 1 is powered off, so that the magnet post 2 is reset upward.
As a supplement to the technical scheme, the pullback device is a tension spring 10 and a pressure spring 14, the upper end of the tension spring 10 is connected to the coil housing 4 above the magnet column 2, the lower end of the tension spring 10 is connected to the upper end of the magnet column 2, and the tension spring 10 applies upward elastic restoring force to the magnet column 2 when the coil 1 is powered off to enable the magnet column 2 to move upwards for resetting; and the lower end of the pressure spring 14 is connected with the coil shell 4 positioned below the magnet column 2, the upper end of the pressure spring 14 is connected with the lower end of the magnet column 2, and the pressure spring 14 applies upward elastic restoring force to the magnet column 2 when the coil 1 is powered off so as to enable the magnet column 2 to move upwards for resetting.
As a complement to the technical solution, an insulating elastic member is provided between the movable contact piece 12 and the fixed contact piece 13 for assisting and correcting the deformation and the rebound of the movable contact piece 12 and the fixed contact piece 13, contacts are provided on both the movable contact piece 12 and the fixed contact piece 13, and the movable contact piece 12 and the fixed contact piece 13 are configured to contact each other by means of the respective contacts. As a supplement to the technical solution, the electromagnetic relay further includes a rectifier bridge 11, and the rectifier bridge 11 is connected between the ac power supply and the coil 1 to shape the ac power into the dc power for the coil 1. As a supplement of the technical scheme, the movable contact piece 12 and the static contact piece 13 are fixed on the capsule base and are led out by being covered by the capsule base, and the leading-out ends are connected with corresponding terminal.
In the above embodiment, it has realized electromagnetic relay's all-round waterproof, dustproof, anticreep, explosion-proof effect for this relay can use open-air environment such as open-air in the field, and precipitation is minimum to its influence. Particularly, the scheme can greatly expand the use scene of the relay, so that the relay can be used in moisture, precipitation and even water, the usable range of the controlled electric control device is widened, and the controllable electric control device installed in the water is controllable.
Although the application is illustrated and described herein with reference to specific embodiments, the application is not intended to be limited to the details shown. Rather, various details of the application may be modified within the scope and equivalents of the claims.
Claims (6)
1. A control method of an electromagnetic relay is characterized in that,
the method comprises the following steps:
converting alternating current into direct current through a rectifier bridge, and keeping the magnetic pole direction of a coil fixed;
the coil is electrified to excite a magnetic field, the direction of the magnetic field excited by the coil is opposite to the inherent magnetic field direction of the magnet column, so that the coil and the magnet column are mutually repelled, the magnet column descends, and the magnet column drives the pushing device to push the waterproof capsule downwards when descending so as to enable the movable contact piece to deflect downwards and be in contact conduction with the static contact piece;
after the coil is powered off, the magnetic field excited by the coil disappears, the magnet column loses downward power, the magnetic field excited by the magnet column temporarily magnetizes the iron column, the magnetization direction of the iron column is the same as that of the magnetic field of the magnet column, so that the iron column and the magnet column are mutually attracted, the magnet column moves upwards, and when the magnet column moves upwards, the pushing device is upwards far away from the waterproof capsule so as to separate the movable contact piece from the static contact piece.
2. The control method of an electromagnetic relay according to claim 1,
after the coil is electrified, the excitation magnetic field magnetizes the iron columns at the same time, the magnetization direction of the iron columns is the same as that of the coil magnetic field and opposite to that of the magnetic field excited by the magnet columns, so that the iron columns and the magnet columns are mutually repelled, and meanwhile, the magnet columns are promoted to descend.
3. The control method of an electromagnetic relay according to claim 1, wherein the electromagnetic relay includes a coil, a magnet post, a pushing device, a pulling device, and a waterproof capsule, the coil is sealed therein by a coil housing formed by injection molding, the magnet post is in a central hole of the coil, and the pulling device is fixed to the coil, the magnet post is located below the pulling device, a lower portion of the magnet post is connected to the pushing device, the pushing device penetrates through an opening in a bottom plate of the coil housing and is opposed to a movable contact of the waterproof capsule located outside the coil housing, the waterproof capsule includes a capsule base and a waterproof capsule fixed to the capsule base, the movable contact and the stationary contact are disposed inside the waterproof capsule, the movable contact and the stationary contact are fixed to the capsule base, and the movable contact is located above the stationary contact.
4. The method of claim 1, wherein the coil, the magnet post and the pushing means are located inside a coil housing, the coil housing is adapted to the shape of the coil to fix the coil inside the coil housing, and the outer periphery of the magnet post is formed into the housing by injection molding.
5. The control method of the electromagnetic relay according to claim 4, characterized in that the pushing device comprises a connecting column, a panel and a pushing column, the lower part of the magnet column is connected with the connecting column, the connecting column penetrates through the opening on the coil housing and is connected with the panel, a plurality of pushing columns are distributed on the lower surface of the panel, the pushing columns are opposite to the moving contact piece of the waterproof capsule and are contacted or separated with or from the waterproof capsule by the pushing columns.
6. The utility model provides an electromagnetic relay, a serial communication port, including the coil, the magnet post, thrust unit, pull-back device and waterproof capsule, the coil is sealed wherein by the coil casing that the mode of moulding plastics formed, the magnet post is in the central hole of coil, and it is fixed that the pull-back device is the coil, the magnet post is located the below of pulling-back device, the sub-unit connection thrust unit of magnet post, thrust unit link up the trompil on the coil casing bottom plate, and relative from top to bottom with the movable contact piece that is located the outside waterproof capsule of coil casing, waterproof capsule includes capsule base and the waterproof rubber cover of fixing to capsule base, movable contact piece and static contact piece set up the inside at waterproof rubber cover, movable contact piece and static contact piece are fixed to capsule base on, and the movable contact piece is located the static contact piece top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111317692.9A CN114975005A (en) | 2021-11-09 | 2021-11-09 | Electromagnetic relay and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111317692.9A CN114975005A (en) | 2021-11-09 | 2021-11-09 | Electromagnetic relay and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114975005A true CN114975005A (en) | 2022-08-30 |
Family
ID=82974480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111317692.9A Pending CN114975005A (en) | 2021-11-09 | 2021-11-09 | Electromagnetic relay and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114975005A (en) |
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2021
- 2021-11-09 CN CN202111317692.9A patent/CN114975005A/en active Pending
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