CN212542281U - AC contactor - Google Patents

Abstract

The utility model discloses an AC contactor, the magnet of the control unit of the AC contactor is installed on the back of the insulation box, the circuit board is installed in the insulation box, the transformer T, the time control integrated circuit IC40160, and the voltage stabilizing and rectifying circuit are arranged on the circuit board; the circuit 380V is connected to the first binding post and the second binding post; the third terminal and the fourth terminal are connected to a coil of the alternating current contactor; the fifth binding post and the sixth binding post are normally open contacts of a relay for a self-locking circuit; the allowance of element parameters is large, the reliability is high, and the elements are not easy to damage; small volume, simple installation and high safety.

Description

AC contactor

Technical Field

The utility model belongs to the technical field of electron, a ac contactor is related to.

Background

At present, an alternating current contactor is a main component for controlling the operation of an electric appliance; because the temperature of the coil rises during operation, the iron core vibrates, the current is large, and more than 90% of power consumption is lost on hysteresis, eddy current and a short circuit ring, so that most of active power consumption of the coil is changed into heat loss. Most of alternating current contactors used in the prior art are CJ 20-100 or CJ 20-160, active power consumed by an electromagnetic system during holding is between 70W and 100W, and meanwhile, as the use places are mostly in the field, sand and dust are more, unstable vibration is easily caused during holding, so that electric arcs are generated by contacts, the contactors are burnt out, and production is further influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an ac contactor to the active power that the electromagnetic system who solves ac contactor that prior art exists consumed when holding is great, and in the more environment of sand and dust such as field, causes more easily to hold unstable vibration, makes the contact produce electric arc, burns out the contactor, and then influences the problem of production.

The utility model discloses an AC contactor, including the insulating box of rectangle box body structure, the back of insulating box is installed the magnet of AC contactor's the control unit, installs the circuit board in the insulating box, be provided with transformer T, time control integrated circuit IC40160 on the circuit board and voltage stabilization, rectifier circuit; the circuit 380V is connected to the first binding post and the second binding post; the third terminal and the fourth terminal are connected to a coil of the alternating current contactor; and the fifth binding post and the sixth binding post are normally open contacts of a relay for the self-locking circuit.

In the above aspect, it is preferable that the insulating case is provided with an upper cover.

It is also preferable that the upper cover is provided with a heat radiation window.

It is also preferable that the upper portion of the insulation box is connected to the upper cover by a connection bolt.

It is also preferable that the rear side wall of the insulating case is provided with mounting screw holes.

It may also be preferred that the rear side wall of the insulating box is provided with a transverse rail frame.

The utility model has the advantages of as follows:

the utility model discloses an alternating current contactor, the active power that the electromagnetic system that can solve the alternating current contactor that prior art exists consumed when holding is great, and in the more environment of sand and dust such as field, causes the unstable vibration of holding more easily for the contact produces electric arc, burns out the contactor, and then influences the problem of production, and it specifically has following advantage: (1) the circuit is simple and optimized, the element parameter allowance is large, the reliability is high, because the reliability of the electronic product is in inverse proportion to the number of the elements, the number of the elements is less, the reliability is higher, and in order to realize the purpose of high reliability, the utility model discloses design the optimization circuit elaborately, make the circuit greatly simplified, the number of the elements is greatly reduced, when determining the parameter of the element, consider that there is great allowance, make the element not fragile; (2) the utility model has the advantages of small volume and simple installation, the module of various specifications can be consistent in volume, for example, the volume can be 112mmX90mmX72mm, the volume is smaller, the space is not occupied, the high-energy permanent magnet is installed on the back surface, the installation is convenient and rapid, the wiring is simple, the auxiliary contact of the contactor is not occupied, the existing secondary control circuit of the contactor is not required to be changed, only the power wire originally connected with the coil of the contactor is required to be connected to the input end of the module, and then the output end of the module is connected with the coil of the contactor; (3) the energy-saving effect is remarkable, through testing, after the contactor is matched with a module with a proper specification, the sound of the closing of the contactor is clear and powerful, and the power-saving rate of a control coil of a common alternating current contactor is generally over 90 percent; (4) the safety is high, the control voltage of the coil of the alternating current contactor energy-saving management module is reduced from AC380V or AC220V to DC12V safety voltage, and the occurrence of accidental electric shock is avoided; (5) the service life of the alternating current contactor is prolonged, and the electromagnetic coil passes through direct current with unchanged direction under the attraction keeping state, so that the power consumption is saved, the serious damage rate of high temperature generated in alternating current operation to an insulating sleeve gasket and a coil is reduced to the lowest point, and the service life of the coil is greatly prolonged; and direct current voltage is adopted to generate magnetic force through the coil to attract the moving contact of the contactor, so that the problem of contact ablation is fundamentally solved, the service life of the alternating current contactor is prolonged, and the workload of maintenance is reduced.

Drawings

Fig. 1 is a circuit diagram of an ac contactor according to the present invention.

Fig. 2 is a schematic front side view of the ac contactor according to the present invention.

Fig. 3 is a schematic rear side view of the ac contactor according to the present invention.

Wherein, 1 is insulating box, 2 is magnet, 3 is first terminal, 4 is the second terminal, 5 is the third terminal, 6 is the fourth terminal, 7 is the fifth terminal, 8 is the sixth terminal, 9 is the upper cover, 10 is the heat dissipation window, 11 is connecting bolt, 12 is the installation screw, 13 is the track frame.

Detailed Description

The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Example 1

An alternating current contactor, see fig. 1, comprises an insulating box 1 with a rectangular box body structure, a magnet 2 of a control unit of the alternating current contactor is installed on the back surface of the insulating box 1, a circuit board is installed in the insulating box 1, and a transformer T, a time control integrated circuit IC40160, a voltage stabilizing circuit and a rectifying circuit are arranged on the circuit board; the circuit 380V is connected to the first binding post 3 and the second binding post 4; the third terminal 5 and the fourth terminal 6 are connected to a coil of the alternating current contactor; the fifth terminal 7 and the sixth terminal 8 are normally open contacts of a relay for a self-locking circuit.

The ac contactor of the present embodiment may be of two types, 380V and 220V, depending on the case of ac contactors used in the field. The purpose of energy saving and temperature reduction is achieved by adopting a direct current operation scheme, namely, after the alternating current contactor is closed, alternating current control is changed into direct current control (by adopting a digital circuit IC40106) within 3 seconds, so that most of loss power in an iron core and a short circuit ring can be saved, the electric loss of an electromagnetic operation system and the temperature rise of a coil of the electromagnetic operation system are greatly reduced, and the purpose is finally achieved.

The alternating current contactor of the embodiment uses alternating current high voltage to attract the moving contact of the alternating current contactor, so that the moving contact and the static contact of the alternating current contactor are closed, and the alternating current contactor is kept for a certain time and then changed into direct current low voltage to maintain the attraction state of the moving contact and the static contact of the contactor. 380V or 220V alternating current pass through first terminal 3, second terminal 4 inserts the back and respectively passes through diode V1, relay normally closed contact J adds on third terminal 5 and fourth terminal 6, the electrical contact actuation of ac contactor coil, time control IC40106 work after about 3 seconds, relay normally closed contact J disconnection, the alternating current steps down the back through transformer T, through diode V2, add on third terminal 5 and fourth terminal 6 after the rectification, the contactor coil passes through low voltage direct current, produce invariable stable electromagnetic field, keep the contact closed. The first binding post 3 and the second binding post 4 are high-voltage input binding posts and are connected with AC380 or AC 220; the third binding post 5 and the fourth binding post 6 are electromagnetic coil binding posts and are connected with an electromagnetic coil of the alternating current contactor; the fifth binding post 7 and the sixth binding post 8 are connected with a normally open contact of a relay and are used for solving the problem of the four-mode false alarm switch well; v1 and V2 are rectifier diodes and are used for providing stable and reliable direct-current voltage for the electromagnetic coil; v3 plays a role in preventing high-voltage short circuit; MP6S is used for rectifying and providing stable voltage for the time delay part of the circuit; the V5 is used for conducting a circuit to enable the JQX coil to be electrified, the relay J is disconnected, and the voltage is transformed by the transformer T, rectified by the V2 and then added to the coil to keep the contact of the alternating current contactor continuously attracted; the IC40160 is used for delaying, generally, after the circuit is conducted for 3 seconds, 9V voltage is output and is added to a base V5 of 8050V5 through a resistor R3 to be conducted, a JQX coil is electrified, and a relay J is disconnected; v6 is a zener diode.

Example 2

An ac contactor similar to embodiment 1 except that, referring to fig. 2, an upper cover 9 is provided on an insulating case 1.

It is also preferable that the upper cover 9 is provided with a heat radiation window 10.

It is also preferable that the upper portion of the insulating case 1 is connected to the upper cover 9 by a connection bolt 11.

It is also preferable that the rear side wall of the insulating case 1 is provided with mounting screw holes 12.

It is also preferred that, referring to fig. 3, the rear side wall of the insulating box 1 is provided with a transverse rail frame 13.

In the ac contactor of this embodiment, the magnets 2 of the control unit are respectively installed on the back of the insulating box 1, the circuit board is installed inside the insulating box 1, and the 380V power input end of the circuit board is provided with the fuse RL1, the time control IC40106, the transformer T, the rectifier module MP6S, and the elements such as the capacitor, the resistor, and the inductor, which are connected in sequence to form a closed working loop. The magnet 2 or the rail bracket 13 may be used for mounting. The circuit 380V is connected to the first binding post 3 and the second binding post 4, and the third binding post 5 and the fourth binding post 6 are connected to the coil of the contactor. The fifth terminal 7 and the sixth terminal 8 are normally open contacts of a relay and are used for a self-locking circuit.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (6)

1. An alternating current contactor comprises an insulation box (1) with a rectangular box body structure, and is characterized in that a magnet (2) of a control unit of the alternating current contactor is installed on the back surface of the insulation box (1), a circuit board is installed in the insulation box (1), and a transformer T, a time control integrated circuit IC40160, a voltage stabilizing circuit and a rectifying circuit are arranged on the circuit board; the circuit 380V is connected into the first binding post (3) and the second binding post (4); the third terminal (5) and the fourth terminal (6) are connected to a coil of the alternating current contactor; the fifth binding post (7) and the sixth binding post (8) are normally open contacts of a relay for a self-locking circuit.

2. An ac contactor according to claim 1, characterized in that the insulating case (1) is provided with an upper cover (9).

3. An ac contactor according to claim 2, wherein the upper cover (9) is provided with a heat radiation window (10).

4. An ac contactor according to claim 2, characterized in that the upper part of the insulating case (1) is connected to the upper cover (9) by means of a connecting bolt (11).

5. An ac contactor according to claim 1, wherein the rear side wall of the insulating case (1) is provided with a mounting screw hole (12).

6. An ac contactor according to claim 1, characterized in that the rear side wall of the insulating case (1) is provided with a transverse rail frame (13).

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