CN204792618U - High voltage direct current relay - Google Patents

Abstract

The utility model discloses a high-voltage DC relay, which comprises a shell, a magnetic circuit part, a contact part and a base; the contact part includes a moving spring part and a static spring part, the moving spring part adopts a bridge structure, and two The two movable contacts are respectively matched with the static contacts on the two static springs that flow in and out as current, and the movable reed is linked with the magnetic circuit part to separate or contact the movable and static contacts when the magnetic circuit part is working. ; On the upper part of the shell, magnetic steels are respectively installed at the side walls corresponding to the two ends of the moving reed, and the magnetic steels at the side walls at the two ends of the moving reed respectively correspond to the contact gaps at the two ends of the moving reed, and the moving The magnetic field direction of the magnetic steel at the side walls at the two ends of the reed is parallel to the current flow direction of the moving reed. The utility model adopts a special structural design, so that the space occupied on the circuit board is equivalent to that of a conventional relay, and the current can flow into the load pin terminal of the relay in any direction without accidents.

Description

HVDC Relay

technical field

The utility model relates to the technical field of relays, in particular to a high-voltage direct current relay.

Background technique

With the increasing development of electric and hybrid vehicles, UPS, fuel cells, inverters, and solar power generation systems, there is an urgent need for compact power relays capable of switching high-voltage DC (above 400VDC) loads.

Chinese patent application number 200810128681.4 discloses a relay, which is used in a circuit that must block high-voltage direct current. This relay for disconnecting a high-voltage direct current load circuit places a permanent magnet in the open/closed position of the dynamic and static contact directly above, so that a magnetic field is applied to the gap between the movable and static contacts, so that the arcs generated in the adjacent movable and static contact gaps are respectively moved from the opposite direction away from each other due to the action of the magnetic field Lorentz force It is blown out in the gap and extinguished, so that when the high-voltage direct current is blocked, the ablation of the relay contacts by the arc is greatly reduced, and the performance and service life of the relay are improved.

However, this relay mainly has the following disadvantages:

1. Since the permanent magnet is set on the top of the static and dynamic contacts of the relay, the product height of the relay is increased, and the volume of today's electronic products is becoming smaller and smaller, and the space occupied by the relay is required to be as small as possible. This existing technology This structure is difficult to meet the requirements.

2. The positive and negative terminals of the power supply at the pins of the relay need to be wired as required. When the wiring is performed as required, the arcs generated at the gap between the dynamic and static contacts can be separated along the The opposite direction away from each other is blown out from the gap and extinguished, but if the wiring is reversed, the arcs generated at the gap between the movable and static contacts will each move along the direction of each other during the process of the pair of movable and static contacts being disconnected. The direction is blown out from the gap. In this case, the currents between different contact groups will overlap in the space, thereby conducting each other to form a short circuit, causing an electrical accident. The relay has the possibility of causing an electrical accident due to misoperation. risk.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a high-voltage direct current relay. Through special structural design, the space occupied by the circuit board of the electronic product is equivalent to that of the conventional relay, and the current can flow in any direction. load pin terminals of the relay without accident.

The technical solution adopted by the utility model to solve the technical problem is: a high-voltage direct current relay, including a shell, a magnetic circuit part, a contact part and a base; The seat accommodates the magnetic circuit part and the contact part; the contact part includes a moving spring part and a static spring part. The static contacts on the two static springs are correspondingly matched, and the moving reed is linked with the magnetic circuit part to separate or contact the moving and static contacts when the magnetic circuit part is working; on the upper part of the shell, corresponding to the moving reed The side walls at both ends are respectively equipped with magnetic steel; the magnetic steel at the side walls at both ends of the moving reed corresponds to the contact gap at both ends of the moving reed, and the magnetic steel at the side walls at both ends of the moving reed The direction of the magnetic field is parallel to the direction of current flow in the moving reed.

The polarities of the two magnetic steels at the side walls corresponding to the two ends of the movable reed are set to attract each other.

The magnetic steels at the side walls at the two ends of the moving reed are respectively facing the contact gaps at the two ends of the moving reed.

The two opposite side walls of the upper part of the housing are respectively provided with outwardly protruding protrusions, so that the lower part of the side walls of the housing maintains the structural features of existing conventional relays without enlarging the occupied space. The magnetic steel Installed in the convex part corresponding to the side wall of the upper part of the shell.

The convex part on the upper part of the casing is provided with an upper opening, and the magnetic steel is put into the convex part of the casing through the upper opening of the convex part of the casing and fixed by dispensing glue.

Compared with the prior art, the beneficial effects of the utility model are:

1. Since the upper part of the shell is used, the side walls corresponding to the two ends of the movable reed are respectively equipped with magnetic steels with mutually attracting polarities, and the side walls of the upper part of the shell are respectively provided with convex parts protruding outward, so that all The lower part of the side wall of the housing maintains the structural features of the existing conventional relay without enlarging the occupied space, and the magnetic steel is installed in the convex part of the upper side wall of the housing. This structure of the utility model can leave enough space at the bottom of the relay without affecting the space arrangement of other devices such as capacitors and resistors and the relay on the circuit board, so that the space occupied by the relay with magnetic steel on the circuit board It takes up almost the same space as the relay without magnetic steel, which improves the space utilization on the circuit board.

2. Since the upper part of the shell is used, the side walls corresponding to the two ends of the moving reed are respectively equipped with magnetic steels that attract each other, and the magnetic steels are respectively facing the contact gaps at the two ends of the moving reed. The magnetic field direction of the magnetic steel at the side walls corresponding to the two ends of the moving reed is parallel to the current flow direction of the moving reed. The structure of the utility model solves the problem that the moving spring passing the current in the magnetic field is deformed by the Lorentz force and causes unstable contact.

3. Due to the use of the upper part of the housing, the side walls corresponding to the two ends of the moving reed are respectively equipped with magnetic steels with mutually attracting polarities, and the magnetic steels corresponding to the side walls at the two ends of the moving reed are respectively facing the moving parts. At the contact gap between the two ends of the reed, the magnetic field direction of the magnetic steel is parallel to the current flow direction of the moving reed. This structure of the utility model makes the direction of the arc blown by the two contact gaps face the opposite direction, that is to say, the direction of the blown arc is in two directions that cannot form overlapping, so it solves the problem of the prior art During the process of disconnecting the contact pairs, the arcs generated at the contact gaps may be blown out from the gaps in the direction of approaching each other, thus causing the arc currents between different contact groups to alternate in space. Stacked, thus conducting each other to form a short circuit, causing the problem of electrical accidents.

4. Due to the use of the upper part of the shell, the side walls corresponding to the two ends of the moving reed are respectively equipped with magnetic steels with mutually attracting polarities, and the magnetic steels corresponding to the side walls at the two ends of the moving reed are respectively facing the moving parts. At the contact gap between the two ends of the reed, the magnetic field direction of the magnetic steel is parallel to the current flow direction of the moving reed. With this structure of the utility model, no matter which direction the current flows into the pin of the relay, it will not affect the effect of blowing the arc. Therefore, the wiring of the pin of the relay of the utility model has no requirement for the positive and negative poles of the power supply, and can be connected arbitrarily, and It can also be used on AC loads.

The utility model will be described in further detail below in conjunction with the accompanying drawings and examples; however, a high-voltage direct current relay of the utility model is not limited to the examples.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a side view of the utility model;

Fig. 3 is a schematic diagram of the structure of the present utility model (after removing the shell);

Fig. 4 is the schematic diagram that the contact part of the utility model cooperates with the magnetic steel;

Fig. 5 is a schematic diagram of the contact part of the utility model cooperating with the magnetic steel (the current flow direction of the moving reed is opposite).

Detailed ways

Example

Referring to Figures 1 to 5, a high-voltage DC relay of the present invention includes a housing 1, a magnetic circuit part 2, a contact part and a base 5; the magnetic circuit part 2 and the contact part are mounted on the base respectively, and the housing 1 is set on the base 5 and accommodates the magnetic circuit part 2 and the contact part; the contact part includes a moving spring part 3 and a static spring part 4, and the moving spring part 3 and the static spring part 4 can be one or more groups , the present embodiment is two groups; the moving spring part 3 adopts a bridge structure and includes a moving reed 31 and a moving contact 32 connected to both ends of the moving reed 31, and the static spring part 4 includes two static springs that flow in and out as current 41 and the static contacts 42 that are connected correspondingly on the two static springs 41, the two movable contacts 32 on the movable reed are respectively matched with the static contacts 42 on the two static springs that flow in and out as current. The moving reed 31 is linked with the magnetic circuit part 2 to separate or contact the moving and static contacts when the magnetic circuit part is working; on the upper part of the housing 1, the side walls corresponding to the two ends of the moving reed are respectively equipped with polarized suction electrodes. Magnetic steel 6, the magnetic steel 6 at the side walls at the two ends of the moving reed is respectively facing the contact gap at the two ends of the moving reed, and the magnetic field direction of the magnetic steel 6 at the side walls at the two ends of the moving reed is in line with the direction of the moving spring The current flow direction of the sheet 31 is parallel.

The side walls of the upper part of the casing 1 are respectively provided with outwardly protruding convex parts 11, so that the lower part of the side walls of the casing maintains the structural characteristics of the existing conventional relay without expanding the occupied space, and the magnetic steel 6 is installed In the convex part of the upper side wall of the housing. It can be seen from FIG. 2 that the structure of the lower space 12 of the relay is the same as that of the existing conventional relay, so it will not affect the installation of electronic components on the circuit board.

The convex part 11 on the upper part of the casing is provided with an upper opening, and the magnetic steel 6 is put into the convex part 11 of the casing through the upper opening of the convex part of the casing and fixed by dispensing glue.

A kind of high-voltage direct current relay of the present utility model, owing to adopted in the upper part of housing 1, the side wall place corresponding to the two ends of movable reed is equipped with the magnet steel 6 that polarities attract each other respectively, and the side wall of housing upper part is respectively provided with to The convex part 11 that protrudes outward, so that the lower part of the side wall of the housing maintains the structural features of the existing conventional relay without expanding the occupied space, and the magnetic steel 6 is installed in the convex part 11 of the upper side wall of the housing. This structure of the utility model can reserve enough space 12 at the bottom of the relay, without affecting the space arrangement of other devices such as capacitors and resistors and the relay on the circuit board, so that the relay with magnetic steel takes up 12% of the space on the circuit board. The space is almost the same as that of a relay without magnetic steel, which improves the space utilization on the circuit board.

A kind of high-voltage direct current relay of the present utility model, owing to adopted in the upper part of housing 1, the side wall place corresponding to the two ends of movable reed is equipped with the magnetic steel 6 that polarities attract each other respectively, and described corresponding to the two ends of movable reed The magnetic steels 6 on the side walls are respectively facing the contact gaps at both ends of the moving reed, and the magnetic field direction T of the magnetic steel is parallel to the current flow direction I of the moving reed. The structure of the utility model solves the problem that the moving spring passing the current in the magnetic field is deformed by the Lorentz force and causes unstable contact.

A kind of high-voltage direct current relay of the present utility model, owing to adopted in the upper part of housing 1, the side wall place corresponding to the two ends of movable reed is equipped with the magnetic steel 6 that polarities attract each other respectively, and described corresponding to the two ends of movable reed The magnetic steels 6 on the side walls are respectively facing the contact gaps at both ends of the moving reed, and the direction of the magnetic field T of the magnetic steels 6 is parallel to the flow direction of the current I of the moving reed. This structure of the utility model makes the direction of the arc blown out by the two contact gaps be in two directions that cannot form overlapping, as shown in Figure 4, among the two static springs 41, one of the static springs The current I of 41 is to flow in, and the current I of another static spring 41 is to flow out. For this reason, the flow direction of the arc current I1 at one end of the movable reed 31 is to flow from the static contact 42 to the movable contact 32, while in the movable spring The flow direction of the arc current I1 at the other end of the sheet 31 is from the movable contact 32 to the static contact 42. The magnetic field produced by the magnetic steel produces a magnetic blowing force F11 at one end of the movable reed 31, and generates a magnetic force at the other end of the movable reed 31. The blowing force F12 can be seen from the figure, the magnetic blowing force F11 and the magnetic blowing force F12 cannot form an overlap, therefore, this structure of the utility model solves the problem that the contact pair in the prior art is disconnected. The arcs generated at the point gaps will be blown out from the gaps in the direction of approaching each other, resulting in the overlapping of arc currents between different contact groups in space, thereby conducting each other to form a short circuit, resulting in electrical accidents The problem.

A kind of high-voltage direct current relay of the present utility model, owing to adopted in the upper part of housing 1, the side wall place corresponding to the two ends of movable reed is equipped with the magnetic steel 6 that polarities attract each other respectively, and described corresponding to the two ends of movable reed The magnetic steels 6 on the side walls are respectively facing the contact gaps at the two ends of the moving reed, and the magnetic field direction of the magnetic steels is parallel to the current flow direction of the moving reed. As shown in Figure 5 again, when the current I of the moving reed 31 flows in the opposite direction, the direction of the magnetic field T of the magnet remains unchanged, and the direction of the magnetic field T of the magnet 6 is still parallel to the direction of the current I of the moving reed. Among the two static springs 41, the current I of one of the static springs 41 is flowing out, and the current I of the other static spring 41 is flowing in. For this reason, the flow direction of the arc current I1 at one end of the moving reed 31 It flows from the movable contact 32 to the static contact 42, and the flow direction of the arc current I1 at the other end of the movable reed 31 is from the static contact 42 to the movable contact 32, and the magnetic field generated by the magnetic steel is on the movable reed 31 One end produces magnetic blowing force F21, and the other end of moving reed 31 produces magnetic blowing force F22. As can be seen from the figure, magnetic blowing force F21 and magnetic blowing force F22 cannot form an overlap. With this structure, no matter which direction the current flows into the relay pins, the arc currents between different contact groups will not overlap in space, which can ensure that the arc currents between different contact groups will not conduct each other Form a short circuit and cause an electrical accident. Therefore, the wiring of the relay pin of the utility model has no requirement for the positive and negative poles of the power supply, and can be connected arbitrarily, and can also be used for AC loads.

The above are only preferred embodiments of the utility model, and do not limit the utility model in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person familiar with the art, without departing from the scope of the technical solution of the utility model, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the utility model, or modify it into an equivalent equivalent Example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical proposal of the present invention.

Claims (5)

1. A high-voltage DC relay, comprising a housing, a magnetic circuit part, a contact part and a base; the magnetic circuit part and the contact part are mounted on the base respectively, and the shell is placed on the base and accommodates the magnetic circuit part and the contact part The contact part includes a moving spring part and a static spring part, and the moving spring part adopts a bridge structure, and the two moving contacts on the moving reed are respectively corresponding to the static contacts on the two static springs that flow in and out as current. Cooperate, the moving reed is linked with the magnetic circuit part to separate or contact the moving and static contacts when the magnetic circuit part is working; it is characterized in that: on the upper part of the housing, the side walls corresponding to the two ends of the moving reed are respectively equipped with Magnetic steel; the magnetic steel at the side walls at both ends of the moving reed corresponds to the contact gap at the two ends of the moving reed respectively, and the direction of the magnetic field at the side walls at the two ends of the moving reed corresponds to the current of the moving reed The flow direction is parallel. 2. The high voltage direct current relay according to claim 1, characterized in that: the polarities of the two magnets at the side walls corresponding to the two ends of the moving reed are set to attract each other. 3. The high voltage direct current relay according to claim 1, characterized in that: the magnetic steels at the side walls at the two ends of the moving reed are respectively facing the contact gaps at the two ends of the moving reed. 4. The high-voltage DC relay according to claim 1, 2 or 3, characterized in that: the two opposite side walls of the upper part of the housing are respectively provided with outwardly protruding protrusions, so that the sides of the housing The lower part of the wall maintains the structural features of the existing conventional relay without enlarging the occupied space, and the magnetic steel is installed in the convex part corresponding to the side wall of the upper part of the housing. 5. The high-voltage direct current relay according to claim 4, characterized in that: the convex part of the upper part of the casing is provided with an upper opening, and the magnetic steel is put into the convex part of the casing through the upper opening of the convex part of the casing and Fix by dispensing the gel phase.