CN113889364A

CN113889364A - Monostable relay capable of resisting extra-large short-circuit current

Info

Publication number: CN113889364A
Application number: CN202111281464.0A
Authority: CN
Inventors: 王卫锋; 马丁·哈桑
Original assignee: Hasco Relays And Electronics International Corp
Current assignee: Hasco Relays And Electronics International Corp
Priority date: 2021-11-01
Filing date: 2021-11-01
Publication date: 2022-01-04

Abstract

The invention provides a monostable relay capable of resisting extra-large short-circuit current, which comprises an auxiliary magnetic circuit part, wherein the auxiliary magnetic circuit part comprises a second yoke, a second coil rack and a second coil; the contact part comprises a normally open static reed component, a normally closed static reed component and a movable reed component, and the armature is selectively connected with the normally open static reed component and the normally closed static reed component through the movable reed component. The relay of the invention is connected with an auxiliary magnetic circuit part in series in a load circuit, when a large current passes through, a coil II 330 in the auxiliary magnetic circuit part generates a large electromagnetic force, and the tail part of an armature 220 is pulled through a yoke II 320 in the circuit, so that the pressure between normally closed contacts is increased, and the contact is more reliable. Thereby ensuring the reliability of the product passing the highest instantaneous short-circuit current.

Description

Monostable relay capable of resisting extra-large short-circuit current

Technical Field

The invention relates to the technical field of relays, in particular to a monostable relay capable of resisting extra-large short-circuit current. The photovoltaic charging system is mainly used.

Background

There is no monostable relay capable of resisting extra-large short-circuit current in the market at present. Current conventional relay mainly includes the coil former, the coil, the static reed, the movable reed, armature, the yoke, armature and yoke link together through the movable reed, this kind of structure resists the counter-force that short-circuit current can only be based on the reed deformation production, under the prerequisite of product miniaturization, low-power consumption, the pressure of providing is limited, can't resist repulsion (the holm power) that big short-circuit current lower contact surface produced, the holm power can make the contact break and produce electric arc to make the relay damage.

Disclosure of Invention

The invention aims to provide a monostable relay capable of resisting extra-large short-circuit current. The photovoltaic charging system is mainly used.

The purpose of the invention is realized by adopting the following technical scheme:

a monostable relay capable of resisting super-large short-circuit current comprises a main magnetic circuit part, an auxiliary magnetic circuit part and a contact part, wherein the main magnetic circuit part comprises an armature, an iron core, a first yoke, a first coil rack and a first coil, the iron core and the first yoke are respectively arranged on the first coil rack, the armature is fixed on the first yoke by a movable reed component, the middle part of the armature and the first yoke form a fulcrum, the monostable relay further comprises the auxiliary magnetic circuit part, the auxiliary magnetic circuit part comprises a second yoke, a second coil rack and a second coil, the tail part of the armature is suspended on the second yoke of the auxiliary magnetic circuit part, a certain gap is reserved in the middle of the second yoke, and a second coil is wound on the second coil rack and fixed on the second yoke; the contact part comprises a normally open static reed component, a normally closed static reed component and a movable reed component, and the armature is selectively connected with the normally open static reed component and the normally closed static reed component through the movable reed component.

Furthermore, the magnetic force of the auxiliary magnetic circuit part attracts the tail of the armature to drive the movable spring piece assembly to be connected with the normally closed static spring piece.

Furthermore, one end of the second coil is electrically connected with the movable reed assembly, and the other end of the second coil is electrically connected with the lead-out pin.

Further, the middle part of the armature contacts with the knife edge surface of the yoke to form a fulcrum.

Further, the second yoke is fixed on the side portion of the first yoke.

Further, the normally open and normally closed static spring components are fixed on the coil rack I, and the movable spring leaf component is fixed on the yoke I.

Furthermore, the upper surface protrusion of armature is equipped with protruding post, is equipped with the riveting hole that suits with protruding post on the movable reed subassembly.

The relay of the invention is different from the prior conventional product in that:

according to the scheme of the invention, an auxiliary magnetic circuit part is connected in series in a load circuit, when a large current is passed, a second coil 330 in the auxiliary magnetic circuit part generates a large electromagnetic force, and the second yoke 320 in the circuit pulls the tail part of the armature 220 so as to increase the pressure between normally closed contacts, so that the contact is more reliable. Thereby ensuring the reliability of the product passing the highest instantaneous short-circuit current.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an exploded view of an embodiment of the present invention;

FIG. 3 is a schematic view of an assembly structure for implementing the present invention;

description of the reference numerals

210-coil former one 220-armature 230-coil one 240-core 260-yoke one 270-bottom plate

280-dynamic leading pin 310-coil former two 320-yoke iron two 330-coil two 110-dynamic spring assembly

120-normally open static spring assembly 130-normally closed static spring assembly

Detailed Description

The following is a detailed description of the present invention with reference to the drawings, but the present invention is not limited to the embodiments

As shown in fig. 1, the main magnetic circuit portion includes an armature 220 and a first yoke 260, and generally, in order to form a complete magnetic circuit and realize the motion control of the armature 220, the main magnetic circuit portion further includes a first coil 230 and a core 240, one end of the armature 220 is connected to the upper end of the first yoke 260, and the armature 220 and the yoke 260 enclose a frame body with one open end; one end of the armature 220 may be movably connected to the upper end of the yoke 260, so that one end of the armature 220 may be supported by the upper end of the yoke 260 and may move up and down by the electromagnetic force of the core 240;

as shown in fig. 1, the contact portion assembly includes a normally open static reed assembly 120, a normally closed static reed assembly 130, and a movable reed assembly 110, the movable reed assembly 110 is riveted to the upper surface of the armature 220, specifically, a protruding column is protruded from the upper surface of the armature 220, a riveting hole matched with the protruding column is formed in the movable reed assembly 110, and riveting is formed by matching the protruding column and the riveting hole, so that use of rivets is reduced, structural integrity is better, and the movable reed assembly 110 can move synchronously with movement of the armature 220, thereby changing a contact state with the normally open static reed assembly 120 or the normally closed static reed assembly 130, and realizing switching of a circuit; the normally open static reed component 120 and the normally closed static reed component 130 are fixed on the first coil rack 210 and used for realizing connection and disconnection with the movable reed component 110;

as shown in fig. 3, the secondary magnetic circuit portion includes a second yoke 320, a second coil former 310, a second coil 330 wound on the second coil former 310, the second yoke 320 riveted to the outer side of the first yoke 260, the riveting method can refer to the riveting method of the armature 220 and the movable spring assembly 110, the second coil former 310 is fixed on the second yoke 320, one end of the second coil 330 is fixed on the movable lead-out pin 280, and the other end is fixed on the movable spring assembly 110;

with reference to fig. 1, fig. 2, and fig. 3, when the monostable relay coil i 230 capable of resisting the extra-large short-circuit current is energized, a magnetic attraction force is generated, the magnetic attraction force attracts the movable armature 220, so that the movable armature 220 approaches the fixed core 240, at this time, along with the movement of the movable armature 220, the front contact of the movable reed assembly 110 is closed with the contact fixed to the normally open stationary reed assembly 120, when the movable armature 220 is completely closed with the fixed core 240, the front contact of the movable reed assembly 110 is completely closed with the contact fixed to the normally open stationary reed assembly 120, and at this time, the current often opens the stationary reed assembly 120, the movable reed assembly 110, the coil ii 330, and the leading pin 280 to be connected to the load. In the process, the load current flows through the second coil 330, and because the load current ratio is smaller, the number of turns of the second coil 330 is less, the generated electromagnetic attraction force is negligible compared with the electromagnetic attraction force generated by the first coil 230, and the normal movement of the movable armature 220 is not influenced. When the first coil 230 is powered off, the magnetic attraction force disappears, the movable armature 220 returns to the original position under the driving of the counter force of the movable reed assembly 110, so that the other side of the front contact of the movable reed assembly 110 is closed with the contact fixed on the normally closed static reed assembly 130, when a large short-circuit current flows, the current flows into the second coil 330 through the movable leading-out pin 280, the second coil 330 generates a large electromagnetic attraction force, and the electromagnetic attraction force pulls the tail part of the movable armature 220 through the second yoke 320 in the loop, so that the contact pressure at the front end of the normally closed static reed assembly 130 is increased, so that the contact is reliably contacted with the front contact of the movable reed assembly 110, and the purpose of resisting the large short-circuit current is achieved.

The auxiliary magnetic circuit part is arranged on the outer side surface of the main magnetic circuit part yoke iron I260, one end of the coil II 330 is connected with the movable leading-out pin 280, and the other end of the coil II is connected with the movable reed component 110, so that the product can be normally switched on and off under the condition of no large short-circuit current rated load current, and when a large short-circuit current passes through the normally closed end, the repulsion force (Homh force) generated between the surfaces of the contacts can be resisted and prevented from being switched off, the contacts can be reliably contacted, and the relay is not damaged. Therefore, the size of the product in the height direction is increased, the sizes in the length direction and the width direction are not increased, and the requirements of compact structure and miniaturization are met;

while the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A monostable relay capable of resisting super-large short-circuit current comprises a main magnetic circuit part, an auxiliary magnetic circuit part and a contact part, wherein the main magnetic circuit part comprises an armature, an iron core, a first yoke, a first coil rack and a first coil, the iron core and the first yoke are respectively arranged on the first coil rack, and the armature is fixed on the first yoke by a movable reed component; the contact part comprises a normally open static reed component, a normally closed static reed component and a movable reed component, and the armature is selectively connected with the normally open static reed component and the normally closed static reed component through the movable reed component.

2. A monostable relay according to claim 1 which is capable of withstanding very large short circuit currents, in which the magnetic force of the secondary magnetic circuit portion attracts the armature tail to bring the movable spring member into engagement with the normally closed static spring.

3. The monostable relay according to claim 1, wherein one end of the second coil is electrically connected to the movable reed assembly and the other end is electrically connected to the pin.

4. A monostable relay according to claim 1 which is capable of withstanding extra short circuit current in which the intermediate section of the armature contacts the knife edge face of the yoke to form a fulcrum.

5. A monostable relay according to claim 1 which is capable of withstanding extra short circuit current, in which the second yoke is fixed to the side of the first yoke.

6. A monostable relay according to claim 1 which is capable of withstanding very large short circuit currents, in which the normally open and normally closed static spring assemblies are secured to the first bobbin and the movable spring assembly is secured to the first yoke.

7. The monostable relay according to claim 1, wherein the armature has a raised post projecting from its upper surface, and the movable spring plate assembly has a rivet hole adapted to the raised post.