CN2636401Y

CN2636401Y - Energy saving contactor having change over switch

Info

Publication number: CN2636401Y
Application number: CN 03272380
Authority: CN
Inventors: 林李杰; 林李忠; 林李东
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-07-05
Filing date: 2003-07-05
Publication date: 2004-08-25
Anticipated expiration: 2013-07-05

Abstract

The utility model belongs to a contactor in low voltage electric appliance, in particular to an energy-saving contactor. The utility model, which is configured with a change-over switch, comprises a shell body, an iron core, a gag bit, a main contactor, an auxiliary contactor, an arc extinguishing chamber, a winding and an electronic component. The winding is composed of double frameworks; a change-over switch is positioned between the double frameworks; a voltage reduction capacitor is arranged on a random framework and assembles into an integrated structure. The utility model, under the precondition of not changing the structural size of the electromagnetic system in existing contactor, only changes the winding parameter and adds electronic component to realize excellent coordination of attracting and release force, make the attracting voltage and release voltage meet with relevant requirements. Therefore, the utility model has the advantages of current change-over without arc, noise elimination, energy saving and reliable close.

Description

The energy-saving contactor of band change over switch

One, technical field

The utility model belongs to the contactor in the low-voltage electrical apparatus field, refers in particular to a kind of energy-saving contactor.

Two, background technology

France TE company released the LC1-F energy-saving alternating current contactor in 1979, include E sections core in its electromagnetic system, be with starting on this E sections core and keep two groups of coils, a side of its skeleton is equipped with special reversing switch, realizes the conversion of starting process to energy-conservation maintenance.This circuit and structure truly have a lot of innovation parts.But this energy-saving contactor also has the some shortcomings part: (1) its energy-saving index is not high enough; (2) coil rack makes structure and complex manufacturing technologyization because of special changing-over sensitive switch is installed; (3) magnetic system through the energy saving optimizing design, does not obtain the material-saving benefit.Chinese patent once disclosed a kind of " no arc current change type energy-saving silencing A.C. contactor " (ZL96235502.X, CN2261671Y), comprise housing, iron core, armature, main contact, auxiliary contact, arc control device, coil, electronic element assembly and current conversion normally closed interlock, the input cross-over connection that it is characterized in that the rectification circuit in the electronic element assembly is on AC power, normally-closed contact is with after electric capacity is in parallel, connect with release-push terminal and contactor coil, cross-over connection is in the output of rectification circuit then, the part that the release-push terminal is connected with coil also connects diode and piezo-resistance, diode is with after resistance is connected, an end that is connected on AC power, the other end is connected to the non-coil sides of release-push terminal.It has the characteristics of no arc current conversion, energy-saving silencing.

Any energy-saving circuit no matter is with regard to its basic functional principle, all by trigger circuit with keep circuit two parts to form.Therefore, how making the reliable conversion of two parts promptly be transformed into the maintenance circuit by trigger circuit, is the key technology of economizer circuit.Selecting for use of this key technology and components and parts will directly influence the reliability of A.C. contactor closure.

Three, utility model content

The purpose of this utility model is to provide a kind of energy-saving contactor with change over switch, and it not only has the characteristics of no arc current conversion, energy-saving silencing, and closed reliable.

For achieving the above object, the solution that the utility model is taked is: a kind of energy-saving contactor with change over switch, comprise housing, iron core, armature, main contact, auxiliary contact, arc control device, coil, electronic element assembly, coil is made of two skeletons, one change over switch places the centre of two skeletons, and a decompression capacitor is installed on arbitrary skeleton and being integral structure.

The utility model is on the basis of the physical dimension that does not change existing contactor electromagnetic system, only change its coil parameter and increase electronic element assembly, the sucking force characteristic reaches good cooperation, pick-up voltage and release voltage are met the demands, it not only has the characteristics of no arc current conversion, energy-saving silencing, and closed reliable.

Four, description of drawings

Fig. 1 is the electromagnetic system structure schematic diagram of present embodiment.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the electrical schematic diagram of the electronic element assembly of present embodiment.

Among Fig. 1 and Fig. 2: 1, coil, 2, change over switch, 3, decompression capacitor, 1-1, skeleton, 1-2, skeleton.

Five, embodiment

Below in conjunction with embodiment and accompanying drawing thereof the utility model is remake description.

Referring to Fig. 1, Fig. 2, a kind of energy-saving contactor with change over switch, comprise housing, iron core, armature, main contact, auxiliary contact, arc control device, coil 1, electronic element assembly, coil 1 is made of two skeleton 1-1,1-2, one change over switch 3 places the centre of two skeleton 1-1,1-2, and a decompression capacitor 3 is installed in arbitrary skeleton 1-1,1-2 is last and being integral structure.

Referring to Fig. 3, in the electronic element assembly, change over switch T, rectifier diode D1, coil CJ and diode D4 series connection constitute the adhesive circuit, decompression capacitor C constitutes the maintenance circuit, diode D2, coil CJ and diode D3 series connection constitute the afterflow circuit, capacitor C 1 and resistance R 1 series connection or piezo-resistance are connected in parallel on power supply A1, A2 two ends, and capacitor C 2 and resistance R 2 series connection or piezo-resistance are connected in parallel on coil CJ two ends, and resistance R is connected in parallel on decompression capacitor C two ends.Decompression capacitor C is for exchanging the high withstand voltage electric capacity of 800V.During work, when power supply A1 is positive potential, the electric current that then provides provides Rectified alternating current to coil CJ after diode D1 rectification, moving behind certain position when the suction of contactor iron core, change over switch T disconnects, and decompression capacitor C seals in the circuit, at this moment diode D2, D3 play the afterflow effect, power supply provides Rectified alternating current through decompression capacitor C to coil CJ, makes the iron core sticking under low-voltage, has reached the purpose of economize on electricity.When power supply A1, A2 two ends dead electricity, the contactor iron core discharges, and resistance R is connected in parallel on power supply A1, A2 two ends by the RC protective circuit that capacitor C 1 and resistance R 1 constitute for decompression capacitor C discharges resistance, prevents line over-voltage; Be connected in parallel on the RC protective circuit that constitutes by capacitor C 2 and resistance R 2 at coil CJ two ends, prevent coil CJ overvoltage; Capacitor C 1 and resistance R 1, capacitor C 2 and resistance R 2 can be replaced by a piezo-resistance.

The technical scheme of present embodiment can be applied to the alternating electromagnet and the various contactor of similar structures.

The utlity model has following characteristics:

1, owing to adopt the mode of Alternating Current Power Supply, dc operation, iron core does not have active loss; The sticking state Adopted decompression capacitor, making electromagnetic system is capacitive load, improves the line power factor, has obtained aobvious The work power savings, and greatly reduced temperature rise, prolonged the service life of contactor.

2, decompression capacitor can adopt and exchange the high withstand voltage electric capacity of 800V, has solved available technology adopting Direct current 630V electric capacity is breakdown phenomenon often.

3, because the attracting process of A.C. contactor is a dynamic process, its dynamic process and combined floodgate phase There is substantial connection at the angle. Different closing phase angles, dynamic process are just different. If A.C. contactor is energy-conservation Essence will take place and change in circuit difference, the dynamic characteristic of its electromagnetic system. If parameter designing is unreasonable, Under some closing phase angle, phenomenon can appear once not closing a floodgate, and this will have a strong impact on contactor work Reliability. Adopt the closed average speed of armature of energy-saving run than the height of no energy-saving run. Therefore We know, the armature closing speed increases, and its Impact energy also increases, this certainly will strengthen because Whole contactor shakes caused contact secondary bounce probability when the bounce-back of armature collision or closure. This Utility model adopts the dedicated convert switch by the magnetic system energy conservation, and it is auxiliary not take contactor Help contact, bring convenience for wiring reaches the solenoid of directly replacing former A.C. contactor; And conversion Switch has played the effect of total head attracting state switch transition, keeps the sticking state by decompression capacitor, like this Not only guaranteed the reliable closure of magnetic system, and improved the cooperation of sucking force characteristic, it is moving to avoid closing a floodgate Can be excessive and cause the excessive collision of magnetic system, thus the secondary vibrations spring of contact suppressed.

In sum, the utility model not only has economize on electricity, material-saving and characteristics easy to use, but also has improved the contactor functional reliability.

Claims

1, a kind of energy-saving contactor with change over switch, comprise housing, iron core, armature, main contact, auxiliary contact, arc control device, coil (1), electronic element assembly, it is characterized in that: coil (1) is made of two skeletons (1-1,1-2), one change over switch (3) places the centre of two skeletons (1-1,1-2), and a decompression capacitor (3) is installed in arbitrary skeleton (1-1,1-2) and goes up and being integral structure.

2, a kind of energy-saving contactor according to claim 1 with change over switch, it is characterized in that: in the described electronic element assembly, change over switch T, rectifier diode D1, coil CJ and diode D4 series connection constitute the adhesive circuit, decompression capacitor C constitutes the maintenance circuit, diode D2, coil CJ and diode D3 series connection constitute the afterflow circuit, capacitor C 1 and resistance R 1 series connection or piezo-resistance are connected in parallel on power supply A1, A2 two ends, capacitor C 2 and resistance R 2 series connection or piezo-resistance are connected in parallel on coil CJ two ends, and resistance R is connected in parallel on decompression capacitor C two ends.

3, a kind of energy-saving contactor with change over switch according to claim 2 is characterized in that: described decompression capacitor C is for exchanging the high withstand voltage electric capacity of 800V.