CN2304181Y

CN2304181Y - Energy-saved silencing ac.contactor

Info

Publication number: CN2304181Y
Application number: CN 97239572
Authority: CN
Inventors: 李培安; 柯贤峰; 叶岁安
Original assignee: HONGGUANG ELECTROMECHAICAL Manufacturing Co XIAN CITY
Current assignee: HONGGUANG ELECTROMECHAICAL Manufacturing Co XIAN CITY
Priority date: 1997-04-25
Filing date: 1997-04-25
Publication date: 1999-01-13
Anticipated expiration: 2007-04-25

Abstract

The utility model relates to an energy-saving silencing AC contactor using pulsating DC excitation. A DC power supplying circuit of an excitation coil of the utility model comprises a coil rectification circuit, a capacitor and a discharge branch circuit, wherein the switching on and off of the rectification circuit is controlled by bidirectional controlled silicon; the capacitor is connected between a trigger circuit of the bidirectional controlled silicon and an AC power supply; the discharge branch circuit is composed of a diode and a capacitor. After the power supplying circuit is switched on, the controlled silicon is switched on for supplying pulsating DC power to the coil, and after the power supplying circuit is switched off, the controlled silicon is cut off and the discharge branch circuit can discharge to cut off the excitation coil rapidly. The contactor does not occupy an auxiliary contact, and the power saving rate of the active power of the utility model can reach above 95%.

Description

The energy-saving damping A.C. contactor

The utility model belongs to electromagnetic relay, is a kind of with the excitatory energy-saving damping A.C. contactor of pulsating direct current.

At present, commercially available or disclosed energy-saving damping contactor has two classes substantially, and a class is to set up a cover mechanical mechanism on the basis of former contactor, is used to lock the armature after the adhesive, makes the magnetizing coil outage simultaneously; Another kind of is to pass to Rectified alternating current to magnetizing coil, can reduce coil power dissipation like this, eliminates noise.Disclosed economize on electricity A.C. contactor of Chinese patent CN2084655 and the disclosed silent power-saving contactor of Chinese patent CN2131200 all belong to back one class.All there is a problem in this class contactor, and promptly the power supply circuits of magnetizing coil will take the auxiliary normally closed interlock of contactor or will set up the normally closed interlock and the governor motion of a pair of special use in addition, in order to the conversion of magnetizing coil power supply circuits.Will certainly influence effective use of contactor like this, bring inconvenience to the user.In addition, the response speed of this class contactor is fast not enough

The purpose of this utility model is improved existing A.C. contactor, and a kind of auxiliary contact that neither takies is provided, and does not also set up the energy-saving damping A.C. contactor of special-purpose contact.

The solution that realizes the utility model purpose is: the energy-saving damping A.C. contactor that is provided comprises: dynamic and static contact, the magnetizing coil that drives moving contact and the DC power-supply circuit of magnetizing coil.Improvements of the present utility model are: the DC power-supply circuit of described magnetizing coil comprises: one is the rectification circuit of load with the magnetizing coil; Be connected to one between this rectification circuit and the AC power and make the bidirectional triode thyristor that switch uses; Be connected to a capacitor between the dc trigger circuit of this bidirectional triode thyristor and the AC power; Form and the other discharge paths that is connected to aforementioned magnetizing coil rectification circuit by diode and electric capacity.Behind the power supply circuits and AC power connection of magnetizing coil, rectification circuit is connected in the controllable silicon conducting, supplies with Rectified alternating current to magnetizing coil; After above-mentioned power supply circuits and AC power disconnection, controllable silicon ends, and the discharge paths discharge makes the quick disjunction of magnetizing coil.

The power supply circuits of above-mentioned magnetizing coil are except that electric capacity, and other elements all can be integrated on the thick film circuit board, and place in the binding post box of contactor.

Compared with prior art, the utility model is owing to control the break-make of rectification circuit with controllable silicon as switch, and is provided with a discharge paths, thus contactor branch, disconnected rapid, and need not to use outer contact.In addition, because the power supply circuits element integrability of the utility model magnetizing coil, and can place in the binding post box, so compact conformation, profile and installation wiring are the same with A.C. contactor, convenience are provided for user's use.

Accompanying drawing is an electrical schematic diagram of the present utility model

Below in conjunction with accompanying drawing content of the present utility model is illustrated.

As shown in the figure: contactor magnetizing coil L is connected on the output of the bridge rectifier of being made up of diode D1, D2, D3 and D4, and the break-make of this rectification circuit is controlled by bidirectional triode thyristor SCR.The circuits for triggering of controllable silicon SCR are made up of four diode D5, D6, D7, D8, two triode BG1, BG2, capacitor C 3 and resistance R 1, R2, R3, R4, wherein four diode D5～D8 form the bridge rectifier loop, two triode BG1, BG2 directly are coupled, and amplify in order to direct current.When exchanging end A, B energized, alternating current is through capacitor C 2 step-downs, diode D5～D8 rectification, amplify by triode BG1, BG2 again, trigger the controllable silicon SCR conducting, the rectification circuit that connection is made up of diode D1～D4, pass to Rectified alternating current for contactor magnetizing coil L, make the armature adhesive of contactor.Diode D9, D10 and voltage-stabiliser tube W1, W2 form voltage stabilizing circuit among the figure.After AC power was closed, the discharge circuit of being made up of diode D11 and capacitor C 1 can make the quick disjunction of magnetizing coil L of contactor.

The contactor and the vacuum contactor of the applicable CJ10 of the utility model, models such as CJ12, CJ20, the power saving rate of its active power reaches more than 95%.

Claims

1, a kind of energy-saving damping A.C. contactor, comprise dynamic and static contact, the magnetizing coil (L) that drives moving contact and the DC power-supply circuit of magnetizing coil, it is characterized in that the DC power-supply circuit of described magnetizing coil (L) comprising: one is the rectification circuit of load with magnetizing coil (L); Be connected to one between this rectification circuit and the AC power and make the bidirectional triode thyristor (SCR) that switch uses; Be connected to a capacitor (C2) between dc trigger circuit of this bidirectional triode thyristor (SCR) and the AC power; Form and the side is connected to the discharge paths of aforementioned magnetizing coil (L) rectification circuit by diode (D11) and electric capacity (C1).

2, contactor as claimed in claim 1, the power supply circuits that it is characterized in that described magnetizing coil (L) are except that electric capacity, and other element all is integrated on the thick film circuit board, and place in the contactor binding post box.