CN2344866Y

CN2344866Y - Energy-saving AC contactor

Info

Publication number: CN2344866Y
Application number: CN 98208212
Authority: CN
Inventors: 陈英钟
Original assignee: Individual
Current assignee: Chen Yingzhong
Priority date: 1998-09-14
Filing date: 1998-09-14
Publication date: 1999-10-20
Anticipated expiration: 2008-09-14

Abstract

The utility model relates to an energy-saving AC contactor of a low voltage electric apparatus. The existing energy-saving AC contactor has the problems of enlarged figure size, complicated structure and increased cost by adding a plurality of electronic components. In order to overcome the problems the existing energy-saving AC contactor has, the utility model has the technical proposal that an additional parallel circuit is connected in series with an original AC loop, wherein, the parallel circuit is composed of an excitation coil and a microswitch. The utility model has the advantages of energy saving to more than 40% without changing the figure size.

Description

Energy saving ac contactor

The utility model relates to low-voltage electrical apparatus, especially A.C. contactor.

A.C. contactor is mainly used in and exchanges 50Hz, and voltage is to 660V, and electric current is in the following electric power system of 630A, and the usefulness for remote connection and disjunction circuit is applicable to frequent control alternating current motor.The developing direction of A.C. contactor is under the situation of profile size constancy now, reduces the coil power consumption, and energy savings increases the service life.Following several patent is disclosed at present:

1, the energy-saving contactor of noiselessness (Chinese patent ZL95204876.0);

2, no power consumption A.C. contactor (having increased permanent magnet and more electronic devices and components);

3, GJK (the series of high efficiency energy-saving multifunctional controller (on the basis of contactor, adding electronic control system) used of A.C. contactor.

Great majority have increased the overall dimension of contactor in above-mentioned these patented products, or have increased more electronic devices and components (controller), make the contactor construction complexity, and manufacturing cost improves.

The purpose of this utility model provides a kind of under the situation of profile size constancy, reduces the coil power consumption, improves the coil A.C. contactor in useful life.

The solution of the utility model energy saving ac contactor is to connect one again by increasing the parallel circuits that excitation coil and sensitive switch (normally closed contact) are formed on original series circuit of being made up of starting switch (normal opened contact), shutdown switch (normally closed contact) and excitation coil.

Described sensitive switch (normally closed contact) is made up of the bruising point that is installed in two beryllium-bronze sheets on the excitation coil skeleton and be installed on the moving iron core skeleton, the adjacent both ends of two beryllium-bronze sheets is normally closed contacts, and two ends are to be connected with the two ends that increase excitation coil respectively in addition.

Described increase excitation coil is connected on the outside of excitation coil, and its number of turn is the 20-25% of the excitation coil number of turn.

The utlity model has following advantage:

1) saves energy, after the energy saving ac contactor energized, electric current flows through through sensitive switch, contactor is adhesive immediately, and starting power is constant, and the bruising point servo-actuated iron core adhesive that is installed on the moving iron core skeleton moves down, the normally closed contact of beryllium-bronze sheet is pressed off, electric current is by starting switch, shutdown switch, excitation coil in the ac circuit, increase excitation coil, increased adhesive impedance in the circuit this moment, makes to inhale to release electric current and holding power minimizing, and saves energy is more than 40%.

2) when long-term work, the temperature rise of contactor reduces greatly, has improved the useful life of contactor.

3) compare with B Series AC Contactor of the same type, overall dimension is constant, is convenient to promote, and simple in structure, the cost increase seldom.

4) the control coil voltage range is big, is example with 220V, and control range is 160-260V, is specially adapted to the higher occasion of line voltage (after 0 o'clock late into the night).

5) can not only apply in the B Series AC Contactor, also can be applied to CJ10, CJ20,3TB, CJX5, in the serial model No.s such as CJX8, power savings is more obvious in big specification electric current especially, and the transformation of the way is more prone to.

Now the utility model is described in further detail by drawings and Examples.

Fig. 1 is common A.C. contactor excitation coil circuit diagram.

Fig. 2 is the utility model energy saving ac contactor excitation coil circuit diagram.

Fig. 3 is the utility model energy saving ac contactor forward partial sectional view.

Fig. 4 is the A-A profile of Fig. 3.

Embodiment of the present utility model is that example is illustrated with the B9 type.It has base 1, shell 2, static iron core 3, excitation coil L4, connecting one outside excitation coil L4 increases excitation coil L15 again, and its coil turn is 23% of the excitation coil number of turn, is fixed with the normally closed contact 6 of the fine motion normally closed switch K that forms with two beryllium-bronzes on the skeleton 10 of excitation coil, on the skeleton 11 of moving iron core 7, be fixed with the bruising point 8 of fine motion normally closed switch K, on shell, also have terminal screw 9.When the utility model uses, press starting switch QA, making current, electric current is through starting switch QA, shutdown switch TA, excitation coil L, sensitive switch K flows through, and the electromagnet excited target produces electromagnetic force, because of electromagnetic force greater than mechanical counter-force, make the iron core adhesive, this moment starting power constant.Because the sensitive switch bruising point that is fixed on the moving iron core skeleton moves down, the normally closed point of sensitive switch is pressed off, this moment, electric current was from increasing excitation coil L ₁Flow through, circuit has increased L ₁Impedance, make to inhale and release electric current and reduce, holding power reduces thereupon, save electric power 47% has realized purpose of energy saving.

Claims

1, a kind of energy saving ac contactor, ac circuit is made up of starting switch (normal opened contact), shutdown switch (normally closed contact) and excitation coil, it is characterized by also to connect one by increasing the parallel circuits that excitation coil and sensitive switch (normally closed contact) are formed in ac circuit.

2, energy saving ac contactor according to claim 1, it is characterized by one of the outside of excitation coil series connection and increase excitation coil, sensitive switch is made up of the bruising point that is installed in two beryllium-bronze sheets on the excitation coil skeleton and be installed on the moving iron core skeleton, the adjacent both ends of two beryllium-bronze sheets is normally closed contacts, and two ends are connected with the two ends that increase excitation coil respectively in addition.

3, energy saving ac contactor according to claim 1 and 2, it is characterized by the number of turn that increases excitation coil is the 20-25% of the excitation coil number of turn.