95A alternating current contactor

Abstract

The utility model discloses a 95A alternating current contactor, and relates to the technical field of electrical control. The contactor comprises a contactor body, a protection system, a contact system, an arc extinguishing system and an electromagnetic system are arranged on the contactor body, the contactor body is of a three-layer stacked structure and sequentially comprises an auxiliary loop, a main loop and the electromagnetic system from top to bottom, a coil wiring terminal of the auxiliary loop is connected with the electromagnetic system, and a coil wiring terminal of the main loop is connected with the electromagnetic system. The control end of the main loop is connected with the contact system and the arc extinguishing system. A traditional structure that a main loop and an auxiliary loop are in the same layer is broken through, the fixed thought that a traditional electromagnetic system coil wiring terminal is designed at the bottom of the 95A alternating current contactor is broken through, a coil control end is connected to the auxiliary loop, and the coil wiring terminal is placed at the top of the contactor body, so that the 95A alternating current contactor has the advantages of being compact in structure, small in size, convenient to wire and high in reliability. And meanwhile, the reliability and the safety of the 95A alternating current contactor are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical control technical field, especially relates to a 95A AC contactor. BACKGROUND

[0002] AC contactor occupies the main position in low voltage distribution system, with the improvement of modern industrial informatization and automation degree, higher requirements are put forward to industrial control automation AC contactor, which requires high performance index, strong combination function and satisfies the diversification demand of users.

[0003] Most of the existing 95A AC contactors adopt "integral type" structure, the main circuit and the auxiliary circuit are designed in the same layer, when the 95A AC contactor is in action, the current in the main circuit will change rapidly, thereby generating a strong electromagnetic field, the electromagnetic field will generate electromagnetic interference to the auxiliary circuit in the same layer, influence the transmission accuracy of the control signal in the auxiliary circuit, cause the problems such as control signal distortion and misoperation. UTILITY MODEL CONTENTS

[0004] In view of the above technical problems, the utility model provides a 95A AC contactor, which is used for solving the problem that most of the existing 95A AC contactors adopt "integral type" structure, and signal interference is generated between the main circuit and the auxiliary circuit.

[0005] In order to realize the above purpose, the technical scheme of the utility model is as follows:

[0006] A 95A AC contactor, comprising a contactor body, a protection system, a contact system, an arc extinguishing system and an electromagnetic system are arranged on the contactor body, the contactor body adopts a three-layer stacked structure, and the auxiliary circuit, the main circuit and the electromagnetic system are sequentially arranged from top to bottom, the coil connection terminal of the auxiliary circuit is connected with the electromagnetic system, and the control end of the main circuit is connected with the contact system and the arc extinguishing system.

[0007] The contact system is composed of a shell, a normally open auxiliary contact, a normally closed auxiliary contact and a main contact, the shell is composed of a left shell and a right shell which are relatively symmetrical, the left shell and the right shell are connected through a connecting mechanism, the normally open auxiliary contact and the normally closed auxiliary contact are arranged on the top of the left shell and the right shell respectively, the main contact is arranged at the bottom of the left shell and the right shell respectively, the main contact is provided with three groups, and the front surface of the left shell and the right shell is respectively provided with an arc extinguishing piece clamping groove for installing the arc extinguishing system.

[0008] The arc extinguishing system is composed of a cavity separated by a separation rib and a groove, and a bridge type contact and an arc extinguishing piece in the cavity, one end of the arc extinguishing piece is provided with an L-shaped arc leading angle, the other end is provided with a connecting hook, the arc extinguishing piece is installed in the arc extinguishing piece clamping groove through the connecting hook, and the bridge type contact is provided with a boat-shaped arc leading angle at both ends.

[0009] The electromagnetic system is composed of an alternating electromagnetic system and a general electromagnetic system.

[0010] The protection system is composed of a top protection cover, an auxiliary protection cover and a main protection cover, and the contactor body top is designed with the main protection cover, the auxiliary protection cover and the top protection cover in sequence.

[0011] The connecting mechanism is composed of connecting hooks and connecting clamping grooves, and the connecting hooks are arranged on the left shell two sides, and the connecting clamping grooves are arranged on the right shell two sides.

[0012] The left shell and the right shell are provided with wiring expansion module plug-in interfaces on one side of the top surface, and are provided with wiring expansion module fixing convexes, normally closed contact clamping windows and normally open contact clamping windows on the front surface.

[0013] The protection system further comprises a quick-plug auxiliary protection cover and a spring terminal clamping type auxiliary protection cover, which are used instead of the auxiliary protection cover.

[0014] The auxiliary protection cover is provided with an expansion module fixing recess on the top surface and an expansion module fixing plug-in interface at the top end.

[0015] The main protection cover is provided with an expansion module fixing window at the top.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] 1. The contactor body adopts a three-layer stacked structure, which is reasonable and compact in layout, reduces the overall volume, is convenient to install and use, and is closely connected between layers, thereby ensuring the stability of the electrical performance.

[0018] 2. The shell of the contact system adopts a left-right symmetrical design, is convenient to assemble and maintain through the connecting mechanism, and the main contact is provided with three groups, which can meet the bearing requirement of a larger current. The normally open auxiliary contact and the normally closed auxiliary contact are arranged on the top of the shell, thereby being convenient to wire and control.

[0019] 3. The arc extinguishing system is designed with a unique isolation rib, a groove and a bridge-shaped contact and an arc extinguishing piece, effectively improves the arc extinguishing capacity. The design of the L-shaped arc leading angle and the boat-shaped arc leading angle increases the arc leading distance, can quickly release the arc energy, reduces the contact ablation time, prolongs the contact service life, thereby improves the reliability and stability of the contactor, and reduces the maintenance cost.

[0020] 4. The electromagnetic system has the AC electromagnetic system and the general electromagnetic system, retains the control mode of the traditional AC electromagnetic system, has the wide voltage, the low power consumption of the coil, the anti-voltage sag and the anti-impact ability, adapts to more working conditions, has the strong versatility, and can work stably under different voltages, reduces the power consumption and the temperature rise, improves the reliability and the service life of the electromagnetic system, and reduces the interference to the external system;

[0021] 5. The protection system is composed of multiple protective covers, can effectively prevent dust, water vapor and other foreign matters from entering the contactor, protects the internal elements from the influence of the external environment, ensures the stable and reliable performance of the contactor, simultaneously, provides multiple types of protective covers for replacement, such as the quick plug type auxiliary protective cover and the spring terminal clamping type auxiliary protective cover, facilitates the user to select according to the actual demand, and improves the adaptability and flexibility of the product. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a half sectional structure schematic view of the utility model;

[0023] Figure 2 It is a main loop and auxiliary loop distribution schematic view in the utility model;

[0024] Figure 3 It is a structure schematic view of the contact system in the utility model;

[0025] Figure 4 It is a structure schematic view of the arc extinguishing system in the utility model;

[0026] Figure 5 It is a structure schematic view of the arc extinguishing piece in the utility model;

[0027] Figure 6 It is a structure schematic view of the AC electromagnetic system in the utility model;

[0028] Figure 7 It is a structure schematic view of the general electromagnetic system in the utility model;

[0029] Figure 8 It is a structure schematic view of the protection system in the utility model;

[0030] Figure 9 It is a structure schematic view of the main protective cover in the utility model;

[0031] Figure 10 It is a structure schematic view of the auxiliary protective cover in the utility model;

[0032] Figure 11 It is a structure schematic view of the quick plug type auxiliary protective cover in the utility model;

[0033] Figure 12The utility model discloses a spring terminal clamping type auxiliary protective cover structure diagram.

[0034] In the drawing,

[0035] 1, contactor body;101, auxiliary circuit;102, main circuit;103, coil terminal;

[0036] 2, contact system;201, left shell;202, right shell;203, main contact;204, normally open auxiliary contact;205, normally closed auxiliary contact;206, wiring expansion module plug interface;207, wiring expansion module fixed convex;208, normally closed contact clamping window;209, normally open contact clamping window;210, arc extinguishing piece clamping groove;211, connecting hook;212, connecting card slot;

[0037] 3, arc extinguishing system;301, cavity;302, bridge contact;303, boat type arc leading angle 304, arc extinguishing piece;305, connecting hook;306, L type arc leading angle;

[0038] 4, electromagnetic system;401, AC electromagnetic system 402, general electromagnetic system;4011, AC coil;4012, AC counterforce spring;4013, E type moving iron;4014, E type static iron;4021, general coil;4022, general counterforce spring;4023, armature;4024, magnetic yoke;4025, magnetic yoke;4026, intelligent control module;

[0039] 5, protection system;501, top protective cover;502, auxiliary protective cover;503, main protective cover;5021, expansion module fixed recess;5022, expansion module fixed plug interface;5023, connecting hook;504, quick plug type auxiliary protective cover;505, spring terminal clamping type auxiliary protective cover;5031, expansion module fixed window. DETAILED DESCRIPTION

[0040] In order to make the utility model's purpose, technical scheme and advantage more clear and obvious, below, combining with specific implementation and referring to attached drawing, the utility model is explained in further detail.Should understand, these descriptions are only exemplary, and not to limit the scope of the utility model.In addition, in following explanation, the description of known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.

[0041] A 95A AC contactor, comprising a contactor body 1, a protection system 5, a contact system 2, an arc extinguishing system 3 and an electromagnetic system 4 are arranged on the contactor body 1, the contactor body 1 adopts a three-layer stacked structure, from top to bottom, auxiliary circuit 101, main circuit 102 and electromagnetic system 4, the coil connection terminal 103 of the auxiliary circuit 101 is connected with the electromagnetic system 4, and the control end of the main circuit 102 is connected with the contact system 2 and the arc extinguishing system 3 respectively.

[0042] The contact system 2 is composed of a shell, a normally open auxiliary contact 204, a normally closed auxiliary contact 205 and a main contact 203, the shell is composed of a left shell 201 and a right shell 202 which are relatively symmetrical, the left shell 201 and the right shell 202 are connected through a connecting mechanism, the normally open auxiliary contact 204 and the normally closed auxiliary contact 205 are arranged at the top of the left shell 201 and the right shell 202 respectively, and the main contact 203 is arranged at the bottom of the left shell 201 and the right shell 202 respectively, the main contact 203 is provided with three groups, and the front surface of the left shell 201 and the right shell 202 is respectively provided with an arc extinguishing piece 304 clamping groove 210 for installing the arc extinguishing system 3.

[0043] The arc extinguishing system 3 is composed of a cavity 301 isolated by a isolation rib and a groove, and a bridge type contact 302 and an arc extinguishing piece 304 in the cavity 301, one end of the arc extinguishing piece 304 is provided with an L-shaped arc leading corner 306, and the other end is provided with a connecting hook 5023 head 305, the arc extinguishing piece 304 is installed in the arc extinguishing piece 304 clamping groove 210 through the connecting hook 5023 head 305, and the bridge type contact 302 is provided with a boat-shaped arc leading corner 303 at both ends, the boat-shaped arc leading corner 303 increases the arc leading distance by a boat-shaped sharp head, improves the rapid release of arc energy, quickly extinguishes arc, and reduces the arc ablation time of the contact.

[0044] The electromagnetic system 4 is composed of an AC electromagnetic system 401 and a general electromagnetic system 402, so that the electromagnetic system 4 of the 95A AC contactor has the traditional AC 85%U S -110%U S control mode, and also has a general control mode with wide voltage, low coil power consumption, strong anti-voltage sag and impact resistance.

[0045] The coil 4011 in the AC electromagnetic system 401 is clamped with an "E" type static iron 4014, the "E" type moving iron 4013 is clamped on the contact bracket, and the counterforce spring 4012 is sleeved on the "E" type moving iron 4013, so as to provide the traditional AC 85%U S -110%U S control mode.

[0046] The general electromagnetic system 402 is provided with a magnetic yoke 4024 on the upper end of the card, and the armature 4023 is inserted through the magnetic yoke 4024. When the 95A AC contactor 1 is attracted, the bottom of the armature 4023 is in reliable contact with the "column type" magnetic yoke 4025, the entire magnetic system is seamlessly connected, the reliability of the connection is improved, and the interchangeability with the AC electromagnetic system 401 is realized. The coil 4021 is provided with an intelligent control module 4026 on the top end of the card. A large current is started at the moment of power-on, so as to ensure that the contact system is quickly and reliably attracted. After being attracted, the duty cycle is adjusted to a small current through PWM control, so as to have lower power consumption and temperature rise. The internal MCU monitors the fluctuation and change of the external power supply in real time, adjusts the output current in time through PID control, keeps the power constant, and reduces the interference of the reverse electromotive force of the DC magnetic system on the external system through the internal surge absorption part when power-off. The 95A AC contactor has the advantages of wide voltage, low power consumption, voltage sag resistance and the like.

[0047] The protection system 5 is composed of a top protection cover 501, an auxiliary protection cover 502 and a main protection cover 503. The main protection cover 503, the auxiliary protection cover 502 and the top protection cover 501 are sequentially designed on the top of the contactor body 1.

[0048] The connecting mechanism is composed of a connecting hook 211 and a connecting clamping groove 212. The connecting hook 211 is arranged on the two sides of the left shell 201, and the connecting clamping groove 212 is arranged on the two sides of the right shell 202.

[0049] The top surface of the left shell 201 and the right shell 202 is provided with a wiring expansion module insertion port 206 on one side, and the front surface is provided with a wiring expansion module fixing convex 207, a normally closed contact clamping window 208 and a normally open contact clamping window 209.

[0050] The protection system 5 further includes a quick plug-in auxiliary protection cover 504 and a spring terminal clamping type auxiliary protection cover 505, which are used instead of the auxiliary protection cover 502.

[0051] The auxiliary protection cover 502 is provided with an expansion module fixing recess 5021 on the upper side, and an expansion module fixing insertion port 5022 is designed on the top end.

[0052] The main protection cover 503 is provided with an expansion module fixing window 5031 on the top.

[0053] In use:

[0054] First, the assembly of the contactor, the electromagnetic system 4 is placed in the bottom layer, for AC electromagnetic system 401, the coil 4011 is accurately clamped on the "E" type static iron 4014, and then the "E" type moving iron 4013 is clamped at the contact support, then the counter force spring 4012 is sleeved on the "E" type moving iron 4013, so as to form the traditional AC 85%US-110%US control mode architecture. While assembling the general electromagnetic system 402, first clamp the magnetic yoke 4024 firmly at the upper end, and accurately insert the armature 4023 through the magnetic yoke 4024. Special attention should be paid to when the contactor 1 is attracted, the bottom of the armature 4023 needs to be in reliable contact with the "column type" magnetic yoke 4025 to ensure seamless connection of the entire magnetic system and realize the replaceable function with the AC electromagnetic system 401. At the same time, the coil 4021 top end is clamped with the intelligent control module 4026, so that it can start with large current in the power-on moment, and ensure that the contact system is quickly and reliably attracted. After attraction, the duty cycle is adjusted to small current by PWM control, realizing low power consumption and temperature rise control. The internal MCU monitors the power fluctuation in real time, adjusts the output current in time to keep the power constant by PID control, and relies on the internal surge absorption part to reduce the reverse electromotive force to the external interference when power off.

[0055] After the electromagnetic system 4 is assembled, the main circuit 102 is installed above it. The control end of the main circuit 102 is carefully connected with the contact system 2 and the arc extinguishing system 3 to be installed subsequently, respectively, to ensure accurate and error-free connection and good contact, and to build a stable path for current conduction. Then the auxiliary circuit 101 is placed on the upper layer of the main circuit 102, and the coil connection terminal 103 of the auxiliary circuit 101 is connected with the electromagnetic system 4 according to the design requirements. Thus, the main three-layer structure of the contactor body 1 is completed.

[0056] The assembly of the starting contact system 2 is started. The left shell 201 and the right shell 202 are taken out, the connecting hooks 211 on the two sides of the left shell 201 are aligned with the connecting clamping grooves 212 on the two sides of the right shell 202, and the left shell 201 is slowly pushed to tightly clamped, and it is ensured that the shell connection is stable and gapless. Then the normally open auxiliary contact 204 is installed at the top of the left shell 201, the normally closed auxiliary contact 205 is installed at the top of the right shell 202, and three groups of main contacts 203 are installed at the bottom of the two shells. During the installation process, the flatness and contact pressure of the contacts are strictly controlled to ensure good conductivity. Then, the arc extinguishing system 3 is installed in the arc extinguishing piece 304 clamping groove 210 of the front of the left shell 201 and the right shell 202. The arc extinguishing piece 304 is taken out, the connecting hook 305 at one end is embedded and fixed in the clamping groove 210, and the arc extinguishing piece 304 is stably in place. At this time, the L-shaped arc leading angle 306 at one end of the arc extinguishing piece 304 and the ship-shaped arc leading angle 303 at both ends of the bridge-shaped contact 302 form an effective arc leading structure. The ship-shaped sharp head increases the arc drawing distance, promotes the rapid release of arc energy, realizes rapid arc extinguishing, and maximizes the arc extinguishing time.

[0057] The installation of the protection system 5 is flexibly selected according to the actual working condition. In the conventional environment, the main protection cover 503, the auxiliary protection cover 502 and the top protection cover 501 are sequentially installed on the top of the contactor body 1. During installation, attention should be paid to the fit between each protection cover to avoid gaps affecting the protection effect. If it is necessary to frequently replace the wiring expansion module, the quick plug-in auxiliary protection cover 504 can be selected to quickly complete the installation and replacement operation by using its convenient plug-in property; if it involves a spring terminal connection scene, the spring terminal clamping type auxiliary protection cover 505 is used. Taking the auxiliary protection cover 502 as an example, during installation, the expansion module fixing groove 5021 on the side thereof needs to be accurately matched with the corresponding part, and the expansion module fixed plug-in interface 5022 at the top thereof ensures stable connection. Similarly, the expansion module fixed window 5031 at the top of the main protection cover 503 is used to meet the specific expansion function requirement.

[0058] In addition, the wiring expansion module plug-in interface 206 on the top surface side of the left shell 201 and the right shell 202 provides interface convenience for external expansion modules, the front wiring expansion module fixing convex 207 is used to assist in fixing the expansion module, the normally closed contact clamping window 208 and the normally open contact clamping window 209 create convenient conditions for subsequent contact maintenance, and all-around protection is provided for the stable and efficient operation of the 95A AC contactor under different working conditions.

[0059] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A 95A AC contactor characterized by: The contactor body (1) is provided with a protection system (5), a contact system (2), an arc extinguishing system (3) and an electromagnetic system (4), and the contactor body (1) adopts a three-layer stacked structure, from top to bottom, an auxiliary circuit (101), a main circuit (102) and the electromagnetic system (4), the coil connection terminal (103) of the auxiliary circuit (101) is connected with the electromagnetic system (4), and the control end of the main circuit (102) is connected with the contact system (2) and the arc extinguishing system (3) respectively.

2. The 95A AC contactor of claim 1, wherein: The contact system (2) is composed of a shell, a normally open auxiliary contact (204), a normally closed auxiliary contact (205) and a main contact (203), the shell is composed of a left shell (201) and a right shell (202), the left shell (201) and the right shell (202) are connected through a connecting mechanism, the normally open auxiliary contact (204) and the normally closed auxiliary contact (205) are arranged at the top of the left shell (201) and the right shell (202) respectively, and the main contact (203) is arranged at the bottom of the left shell (201) and the right shell (202) respectively, the main contact (203) is provided with three groups, and the front of the left shell (201) and the right shell (202) is provided with an arc extinguishing piece clamping groove (210) for installing the arc extinguishing system (3).

3. An AC contactor according to claim 2, wherein: The arc extinguishing system (3) is composed of a cavity (301) separated by a separation rib and a groove, and a bridge type contact (302) and an arc extinguishing piece (304) in the cavity (301), one end of the arc extinguishing piece (304) is provided with an L-shaped arc leading corner (306), the other end is provided with a connecting hook (5023) head (305), the arc extinguishing piece (304) is installed in the arc extinguishing piece clamping groove (210) through the connecting hook (5023) head (305), and the bridge type contact (302) is provided with a boat-shaped arc leading corner (303) at both ends.

4. The 95A AC contactor of claim 3, wherein: The electromagnetic system (4) is composed of an alternating electromagnetic system (401) (4) and a general electromagnetic system (402) (4).

5. An AC contactor according to claim 4, wherein: The protection system (5) is composed of a top protection cover (501), an auxiliary protection cover (502) and a main protection cover (503), and the contactor body (1) is sequentially provided with the main protection cover (503), the auxiliary protection cover (502) and the top protection cover (501) at the top.

6. The 95A AC contactor of claim 2, wherein: The connecting mechanism is composed of a connecting hook (211) and a connecting clamping groove (212), the connecting hook (211) is arranged on both sides of the left shell (201), and the connecting clamping groove (212) is arranged on both sides of the right shell (202).

7. The 95A AC contactor of claim 2, wherein: The top surface of the left shell (201) and the right shell (202) is provided with a wiring expansion module plug interface (206) on one side, and the front surface is provided with a wiring expansion module fixing convex (207), a normally closed contact clamping window (208) and a normally open contact clamping window (209).

8. The 95A AC contactor of claim 5, wherein: The protection system (5) further comprises a quick plug type auxiliary protection cover (504) (502) and a spring terminal clamping type auxiliary protection cover (505), which is used instead of the auxiliary protection cover (502).

9. The 95A AC contactor of claim 5, wherein: The auxiliary protective cover (502) is provided with an expansion module fixing groove (5021) on the upper side and an expansion module fixing plug-in interface (5022) at the top.

10. The 95A AC contactor of claim 5, wherein: The main protective cover (503) is provided with an expansion module fixing window (5031) at the top.

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