CN202434445U

CN202434445U - Tripping electromagnet for breaker

Info

Publication number: CN202434445U
Application number: CN2011205704281U
Authority: CN
Inventors: 毛振风; 周敏琛; 俞晓峰; 陈英; 管瑞良
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2011-12-31
Filing date: 2011-12-31
Publication date: 2012-09-12
Anticipated expiration: 2021-12-31

Abstract

A tripping electromagnet for a breaker belongs to the technical field of low-voltage electrical apparatus and comprises a U-shaped yoke and an armature. One end of the armature serves as a rotary fulcrum and the other end of the armature serves as an attraction end. A primary magnetic pole and an auxiliary magnetic pole are disposed at one end of the yoke facing the attraction end of the armature. The primary magnetic pole is matched with the attraction end of the armature to form a first torque which enables the armature to attract the yoke. The auxiliary magnetic pole is disposed on one side of the primary magnetic pole in an extension manner. The auxiliary magnetic pole extends from the periphery of the attraction end of the armature and along a direction opposite to the attraction direction. The auxiliary magnetic pole is matched with the attraction end of the armature to form an attraction or separation second torque which is smaller than the first torque. The tripping electromagnet has the advantages that the auxiliary magnetic pole which is specially used for lowering initial attraction force of the electromagnet is disposed on the yoke, initial output force of the electromagnet is lowered effectively, enough output force can be output at a final stage of the attraction of the electromagnet, and design easiness and action reliability of a large current breaker using the electromagnet to detect current are achieved.

Description

Circuit breaker is used release electromagnet

Technical field

The utility model belongs to the low voltage electrical apparatus technology field, is specifically related to a kind of circuit breaker and uses release electromagnet

Background technology

low-voltage circuit breaker generally adopts electromagnet to come the detection failure electric current and promotes the circuit breaker tripping separating brake, and general electromagnet such as beating type electromagnet have the yoke and the rotating armature of U type.This electromagnet is used quite a lot of in minimum circuit breaker, but is applied in large current interruption device (more than rated current 1600A) last time, has some difficulties.On the one hand; Satisfy the final stage of armature adhesive can export enough power make breaker mechanism can release action; The area of core section of the flux path that general armature and yoke are constituted needs enough big, so that can not shift to an earlier date saturated and the power output weakening electromagnet at adhesive final stage magnetic circuit; On the other hand, when adhesive not, because the circuit breaker rated current is bigger; Therefore the suction between yoke and the armature is also bigger; Electromagnet just moves when low dropout setting current value easily, is difficult to set high dropout setting current value, causes the difficulty in some practical applications.Therefore be badly in need of a kind of electromagnet, can guarantee can provide enough output in the adhesive final stage, can reduce initial electromagnetic attraction again.

The way of initial electromagnetic attraction of reduction known today has: the one, strengthen the working gas gap between armature and the yoke; Can reduce initial electromagnetic attraction; But cause impulse stroke long easily, increase the back mechanically operated design difficulty of level and can influence miniaturization Design; The 2nd, increase puts on the spring counter-force on the armature, but causes the mechanical system internal stress to become shortcoming big and the synchronous reduction of adhesive final stage power output easily; The 3rd, in magnetic circuit, increase fixedly air gap, but the defective that also can cause adhesive final stage power output to reduce.Therefore not seeing as yet at present can the simple and effective technical scheme that addresses the above problem.

For this reason, the applicant has carried out actively and effectively attempting, and has found the way that solves the problems of the technologies described above, and the technical scheme that will introduce below produces under this background

Summary of the invention

The purpose of the utility model is to provide a kind of simple in structure, can effectively reduce initial electromagnetic attraction, can guarantee to provide the circuit breaker of enough power outputs to use release electromagnet in the adhesive final stage again.

The purpose of the utility model reaches like this; A kind of circuit breaker is used release electromagnet; Yoke and one who comprises a U type is used for the armature that matches with yoke; One end of said armature is the adhesive end as the other end of rotating fulcrum, armature; Be characterized in: described yoke has a main pole and an auxiliary magnetic pole at that end towards armature adhesive end, and described main pole cooperates with the adhesive end of armature and produces makes armature do first torque of adhesive campaign to yoke, and described auxiliary magnetic pole is arranged on the sidepiece of main pole; This auxiliary magnetic pole extends along the opposite direction of armature adhesive direction from the periphery of armature adhesive end, and produces adhesive littler than first torque or second torque that separates with the adhesive end cooperation of armature.

are in a specific embodiment of the utility model; Has the first adhesive face on the described main pole; Correspondingly be formed with the second adhesive face on the adhesive end of described armature, produce first suction between yoke and the armature through making the first adhesive face and cooperating of the second adhesive face; Have the 3rd adhesive face on the described auxiliary magnetic pole, correspondingly be formed with the 4th adhesive face on the adhesive end of described armature, produce second suction between yoke and the armature through making the 3rd adhesive face and cooperating of the 4th adhesive face.

are in another specific embodiment of the utility model; Roughly L-shaped setting between described first adhesive face and described the 3rd adhesive face, and equally roughly L-shaped setting between described second adhesive face and described the 4th adhesive face.

are in another specific embodiment of the utility model; Described release electromagnet also comprises first support, second support, bearing pin, locating part, power transmission shaft and reaction spring; Described yoke is fixed between first support and second support, and described armature is connected between first support and second support through bearing pin rotationally; Described locating part is fixed on first support, is used for matching with described armature; Described power transmission shaft is rotatably fixing with respect to first support, when described armature receives electromagnetic attraction to produce displacement, can drive power transmission shaft and rotate; One end of described reaction spring is connected with first support, and the other end of described reaction spring is connected with described armature.

are in another specific embodiment of the utility model; Described power transmission shaft comprises a body, cantilever and drive pin; One end of described cantilever is fixed on the body; Be fixed with drive pin on the other end of described cantilever, described drive pin is used for being connected with described armature.

also have in the specific embodiment the utility model, offer on the described armature to be used for the mounting hole that realization is connected with described drive pin cooperation.

also have in the specific embodiment the utility model; Described release electromagnet also comprises first shell, second shell; Described first shell and second shell are coated on outside described first support, second support, yoke, bearing pin, locating part, armature, power transmission shaft and the reaction spring; And first shell is fixed through first screw and first support, and described second shell fixes through second screw and first shell.

After the utility model adopts technique scheme; The beneficial effect that has: the yoke of electromagnet is provided with the auxiliary magnetic pole of the initial electromagnetic attraction of special reduction; Reduced the initial power output of electromagnet effectively; Final stage at electromagnetic actuation can be exported enough big power output again, has solved the large current interruption device and has adopted electromagnet to detect the design difficulty and the reliable in action property of electric current.

Description of drawings

Fig. 1 is the perspective view of the described DC electromagnet of the utility model under attracting state.

The perspective view that Fig. 2 is the described DC electromagnet of the utility model under attracting state not.

Fig. 3 is the perspective view of the utility model on the opposite side direction.

Fig. 4 is the perspective view of the described power transmission shaft of the utility model.

Fig. 5 is installed on the inner application examples structural representation of circuit breaker for the utility model.

Fig. 6 is the sectional perspective exploded view of Fig. 5.

Fig. 7 is the stereochemical structure sketch of the utility model after first, second support outer has first, second shell.

Fig. 8 is the plane structure chart that the described yoke of the utility model, armature cooperate.

The electromagnetic system figure that Fig. 9 is the utility model release electromagnet when adhesive not.

Figure 10 is the electromagnetic system figure of the utility model release electromagnet when adhesive.

Among figure: 1. first support; 2. second support; 3. yoke, 31. main poles, 301. first adhesive faces, 32. auxiliary magnetic poles, 302. the 3rd adhesive faces, 361. main air gaps, 362. are assisted air gaps; 4. bearing pin; 5. locating part; 6. armature, 61. mounting holes, 601. second adhesive faces, 602. the 4th adhesive faces; 7. clutch shaft bearing; 8. power transmission shaft, 81. drive pins, 82. cantilevers, 83. bodies; 9. second bearing; 10. reaction spring; 11. first shell; 12. second shell; 13. first screw; 14. second screw; 15. circuit breaker main bus bar; F1. first suction; F2. second suction; M1. first torque; M2. second torque; Ф 1. main fluxs; Ф 2. auxiliary magnetic fluxs.

Embodiment

can be expressly understood the technical spirit and the beneficial effect of the utility model more for the auditor that the makes Patent Office especially public; The applicant general elaborates with the mode of embodiment below; But the description to embodiment all is not the restriction to the utility model technical scheme, any according to the utility model design done only for pro forma but not substantial equivalent transformation all should be regarded as the technical scheme category of the utility model.

see also Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 7, Fig. 8; A kind of circuit breaker is used release electromagnet, comprises first support 1, second support 2, yoke 3, bearing pin 4, locating part 5, armature 6, power transmission shaft 8, reaction spring 10, first shell 11 and second shell 12.Described yoke 3 is the U type; The yoke 3 of this U type comprises main pole 31, auxiliary magnetic pole 32; Wherein: main pole 31 has the first adhesive face 301, and auxiliary magnetic pole 32 has the 3rd adhesive face 302, and roughly L-shaped setting between the 3rd adhesive face 302 and the first adhesive face 301; Yoke 3 is fixed between first support 1 and second support 2, the die cavity that has hollow in the centre of yoke 3.Described armature 6 has the second adhesive face 601 and the 4th adhesive face 602, roughly L-shaped setting between described the 4th adhesive face 602 and the described second adhesive face 601; Armature 6 is connected between first support 1 and second support 2 through bearing pin 4 rotationally, and armature 6 can freely be rotated around bearing pin 4, on armature 6, offers mounting hole 61.Described locating part 5 is fixed on first support 1, is used for matching with described armature 6, specifically: by 6 position-limiting actions of 5 pairs of armature of locating part, armature 6 can only be rotated between position shown in Figure 1 and position shown in Figure 2.One end of described reaction spring 10 is connected with first support 1, and the other end of reaction spring 10 is connected with described armature 6, and armature 6 is abutted against on the locating part 5 when free state.Described power transmission shaft 8 comprises a body 83, cantilever 82 and drive pin 81; One end of described cantilever 82 is fixed on the end of a body 83; Be fixed with drive pin 81 on the other end of cantilever 82, in the mounting hole 61 that described drive pin 81 inserts on the armature 6, when armature 6 is moved by electromagnetic attraction between position shown in Figure 1 and position shown in Figure 2; Can spur cantilever 82 through drive pin 81 rotates around axle body 83; The other end of described axle body 83 is processed into wedge shape, and the convenient torsion that externally transmits also is separately installed with clutch shaft bearing 7, second bearing 9 that power transmission shaft 8 is rotated flexibly at the two ends of axle body 83 length directions.When mounted; Described first shell 11 and second shell 12 are coated on outside described first support 1, second support 2, yoke 3, bearing pin 4, locating part 5, armature 6, power transmission shaft 8 and the reaction spring 10; And first shell 11 is fixing through first screw 13 and first support 1; Described first shell 12 fixes through second screw 14 and first shell 11, and described power transmission shaft 8 is installed on described first shell 11 through clutch shaft bearing 7, second bearing 9 rotationally.

Please continue to consult Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 7 and combine Fig. 5, Fig. 6, Fig. 8, Fig. 9, Figure 10, the course of work of narration the utility model:

the utility model circuit breaker is with release electromagnet such as Fig. 8, Fig. 9, shown in Figure 10, and described yoke 3 comprises main pole 31, auxiliary magnetic pole 32, and main pole 31 has the first adhesive face 301, and auxiliary magnetic pole 32 has the 3rd adhesive face 302; Described armature 6 has the second adhesive face 601, the 4th adhesive face 602; Be formed with main air gap 361 between the described first adhesive face 301 and the second adhesive face 601; Be formed with auxiliary air gap 362 between described the 3rd adhesive face 302 and the 4th adhesive face 602; After the energising of circuit breaker major loop, because electromagnetic induction principle forms main flux Ф 1 in yoke 3, armature 6, main air gap 361; Assist magnetic flux Ф 2 and in yoke 3, armature 6, auxiliary air gap 362, form; Produce the first suction F1 in the main air gap 361 of main flux Ф 1 between the adhesive end of main pole 31 and armature 6, produce first torque M 1 that makes armature 6 do the adhesive campaign and armature 6 is rotated around pivot pin 4, produce the second suction F2 in the auxiliary auxiliary air gap 362 of magnetic flux Ф 2 between the adhesive end of auxiliary magnetic pole 32 and armature 6 to yoke 3 by the first suction F1; According to lever principle, the second suction F2 produces than little adhesive of first torque M 1 or second torque M 2 of separation.During the initial adhesive of electromagnet, all there is certain distance of opening in main air gap 361 with auxiliary air gap 362, because the bypass effect of auxiliary magnetic flux Ф 2; Reduced main flux Ф 1; Thereby the first suction F1 is reduced, and then reduced first torque M 1, because second torque M 2 is less; Influence to first torque M 1 is less, initially exports torque thereby reduced electromagnet.Final stage at electromagnetic actuation; Main air gap 361 is reduced to smaller value, and auxiliary air gap 362 still keeps certain distance of opening, so the main flux Ф 1 of electromagnet increases to higher value at this moment; And auxiliary magnetic flux Ф 2 is reduced to smaller value; This moment, the first suction F1 increased to higher value, and the second suction F2 is reduced to smaller value, thereby obtained the first bigger torque M 1; And suction F2 is less ignores owing to second for second torque M 2, has guaranteed that electromagnet can export bigger output torque in the final stage of adhesive.The size of adjustment auxiliary magnetic pole then can reduce electromagnet and initially export torque under the prerequisite that does not influence electromagnetic actuation final stage output torque, be applicable to that release electromagnet is used in the circuit breaker overcurrent protection of big drop-away current.

circuit breaker is with release electromagnet such as Fig. 5, the circuit breaker inside that is installed on shown in Figure 6, and circuit breaker main bus bar 15 passes the die cavity in the middle of the yoke 3.Like Fig. 1, shown in 2, release electromagnet device is formed magnetic circuit system by yoke 3, armature 6, when circuit breaker main bus bar 15 passes through direct current, then generates an electromagnetic field in the working gas gap between yoke 3 and armature 6, and 3 pairs of armature of yoke 6 produce electromagnetic attractions.When the electric current in the circuit breaker main bus bar 15 was very little, the electromagnetic attraction of generation was relative also very little, because the tension of reaction spring 10, armature 6 is failure to actuate; Increase along with electric current; Electromagnetic attraction is also increasing, when electromagnetic attraction is increased to greater than reaction spring 10 pulling force, and armature 6 actions; Its position by position shown in Figure 2 to rotated position shown in Figure 1; Drive pin 81 on mounting hole on the armature 6 61 pulling power transmission shafts 8 moves upward simultaneously, and cantilever 82 is clockwise rotated around axle body 83, externally transmits torsion through the tapered end of the other end on the axle body 83.This torsion can put on the brake separating mechanism of circuit breaker through the transmission mechanism of circuit breaker, makes breaker open operation, reaches the effect of overcurrent protection.

In sum; It is a kind of simple in structure that the utility model provides; Can effectively reduce initial electromagnetic attraction, can guarantee to provide in the adhesive final stage circuit breaker tripping electromagnet of enough power outputs again, this technical scheme has reached goal of the invention, has embodied the described technique effect of applicant

Claims

1. a kind of circuit breaker is used release electromagnet; Yoke (3) and one who comprises a U type is used for the armature (6) that matches with yoke (3); One end of said armature (6) is the adhesive end as the other end of rotating fulcrum, armature (6); It is characterized in that: described yoke (3) has a main pole (31) and an auxiliary magnetic pole (32) at the end towards armature (6) adhesive end; Described main pole (31) cooperates with the adhesive end of armature (6) and produces first torque M 1 that makes armature (6) do the adhesive campaign to yoke (3); Described auxiliary magnetic pole (32) is arranged on the sidepiece of main pole (31), this auxiliary magnetic pole (32) from the periphery of armature (6) adhesive end the opposite direction along armature (6) adhesive direction extend, and cooperate with the adhesive end of armature (6) and produce than little adhesive of first torque M 1 or second torque M 2 of separating.

2. circuit breaker according to claim 1 is used release electromagnet; It is characterized in that having the first adhesive face (301) on the described main pole (31); Correspondingly be formed with the second adhesive face (601) on the adhesive end of described armature (6), produce the first suction F1 between yoke (3) and the armature (6) through making first adhesive face (301) and cooperating of the second adhesive face (601); Has the 3rd adhesive face (302) on the described auxiliary magnetic pole (32); Correspondingly be formed with the 4th adhesive face (602) on the adhesive end of described armature (6), produce the second suction F2 between yoke (3) and the armature (6) through making the 3rd adhesive face (302) and cooperating of the 4th adhesive face (602).

3. circuit breaker according to claim 2 is used release electromagnet; It is characterized in that roughly L-shaped setting between described first adhesive face (301) and described the 3rd adhesive face (302), and equally roughly L-shaped setting between described second adhesive face (601) and described the 4th adhesive face (602).

4. circuit breaker according to claim 1 is used release electromagnet; It is characterized in that described release electromagnet also comprises first support (1), second support (2), bearing pin (4), locating part (5), power transmission shaft (8) and reaction spring (10); Described yoke (3) is fixed between first support (1) and second support (2), and described armature (6) is connected between first support (1) and second support (2) through bearing pin (4) rotationally; Described locating part (5) is fixed on first support (1), is used for matching with described armature (6); Described power transmission shaft (8) is rotatably fixing with respect to first support (1), when described armature (6) receives electromagnetic attraction to produce displacement, can drive power transmission shaft (8) and rotate; One end of described reaction spring (10) is connected with first support (1), and the other end of described reaction spring (10) is connected with described armature (6).

5. circuit breaker according to claim 4 is used release electromagnet; It is characterized in that described power transmission shaft (8) comprises a body (83), cantilever (82) and drive pin (81); One end of described cantilever (82) is fixed on the body (83); Be fixed with drive pin (81) on the other end of described cantilever (82), described drive pin (81) is used for being connected with described armature (6).

6. circuit breaker according to claim 4 is used release electromagnet, it is characterized in that offering on the described armature (6) mounting hole (61) that is used for cooperating with described drive pin (81) and realizes being connected.

7. Circuit breaker according to claim 4 is used release electromagnet; It is characterized in that described release electromagnet also comprises first shell (11), second shell (12); Described first shell (11) and second shell (12) are coated on outside described first support (1), second support (2), yoke (3), bearing pin (4), locating part (5), armature (6), power transmission shaft (8) and the reaction spring (10); And first shell (11) is fixing through first screw (13) and first support (1), and described second shell (12) fixes through second screw (14) and first shell (11)