CN2478232Y

CN2478232Y - Automatic energy saver of a.c. contactor

Info

Publication number: CN2478232Y
Application number: CN 01234863
Authority: CN
Inventors: 廖鹏良
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-04-13
Filing date: 2001-04-13
Publication date: 2002-02-20
Anticipated expiration: 2011-04-13

Abstract

The utility model relates to an AC contactor automatic energy-conservation device, which comprises the capacitors C1-C4, the resistances R1-R4, the diode rectifier bridges VD3-VD6, a diode VD1, a voltage-stabilizing tube VD2, a miniature relay coil K as well as the contactor K1, the triodes VT 1 and the VT 2 connected into an automatic energy-conservation circuit. The device is arranged in the protection housing and is provided with 4 external terminals A, B, C and D, which are composed of two input terminals and two output terminals, which are respectively connected with the AC contactor and the control circuit. The device has the advantages that a great deal of electric energy is saved so that the power consumption by the AC contactor is reduced for about 2/3; and the application scope is wide and is applicable to various types of AC contactors. The device can be used to both the manual control signal circuit and the automatic control signal circuit.

Description

A.C. contactor automatic energy saving device

The utility model relates to a kind of alternating-current contactor energy-saving device, particularly A.C. contactor automatic energy saving device.

Existing all types of A.C. contactor, because the disjunction of its contact and closure all must have certain stroke distances, for guaranteeing that power receiving equipment obtains reliable voltage, electric current, it is reliably closed with the contact of guaranteeing contactor that the solenoid of contactor must provide enough big power to produce enough big electromagnetic force, and after the contacts of contactor closure, just do not needed so big power, reduce because of the closed air gap of contactor iron core this moment, electric current by contactor coil more than the closing of contact before, be that the preceding initial condition electric current of iron core and armature closure is much littler, but iff just keeping the reliable closure state of contactor, then still much smaller than this electric current.Existing A.C. contactor after contactor iron core closure, still provides more high-power to its solenoid always, has so just wasted the energy greatly.This is to fail the disadvantage that overcomes so far always.

The purpose of this utility model is to provide a kind of alternating-current contactor energy-saving device, can reduce the electric current of keeping after the A.C. contactor closure, can guarantee the A.C. contactor reliability service again, and not change the existing structure of A.C. contactor.

Technical solution of the present utility model is a kind of A.C. contactor automatic energy saving device, is loaded in the guard shield by auto power down circuit to constitute, and 4 external connection end A, B, C, D are arranged; By capacitor C ₁～C ₄, resistance R ₁～R ₄, diode rectifier bridge VD ₃～VD ₆, diode VD ₁, voltage-stabiliser tube VD ₂, midget relay coil K and contact K thereof ₁, triode VT ₁, VT ₂Be connected into auto power down circuit; Auto power down circuit has 4 external connection end A, B, C, D, C ₂Connect end altogether for A, B, C with the end that connects altogether of KM ₁With K ₁And the end that connects altogether of KM is C end, rectifier bridge VD ₃～VD ₆One end and C ₁, K ₁The end that connects altogether hold for D.Description of drawings is as follows:

Fig. 1 is the circuit connecting figure of A.C. contactor automatic energy saving device catcher dynamic control signal.

Fig. 2 is the circuit connecting figure that A.C. contactor automatic energy saving device connects automatic control signal.

Fig. 3 is the circuit connecting figure of A.C. contactor automatic energy saving device.

The utility model further specifies as follows in conjunction with specific embodiments referring to accompanying drawing:

A kind of A.C. contactor automatic energy saving device is loaded in the guard shield by auto power down circuit and constitutes, and 4 external connection end A, B, C, D are arranged; By capacitor C ₁～C ₄, resistance R ₁～R ₄, diode rectifier bridge VD ₃～VD ₆, diode VD ₁, voltage-stabiliser tube VD ₂, midget relay coil K and contact K thereof ₁, triode VT ₁, VT ₂Be connected into auto power down circuit, referring to accompanying drawing 3.Auto power down circuit has 4 external connection end A, B, C, D, C ₂Connect end altogether for A, B, C with the end that connects altogether of KM ₁With K ₁And the end that connects altogether of KM is C end, rectifier bridge VD ₃～VD ₆One end and C ₁, K ₁The end that connects altogether hold for D.

The circuit connecting figure of A.C. contactor automatic energy saving device catcher dynamic control signal is referring to accompanying drawing 1, and two external connection end of the A of alternating-current contactor energy-saving device JN, D are serially connected among the contactor control loop U-V, and the coil KM that two external connection end of B, C contact with interchange connects.In the control circuit that the A end connects, be serially connected with stop button SB, start button SB ₁With with SB ₁The auxiliary normally open contact KM of A.C. contactor in parallel ₁

A.C. contactor automatic energy saving device connects the circuit connecting figure of automatic control signal referring to accompanying drawing 2, alternating-current contactor energy-saving device JN connects with aforementioned with ac contactor coil KM and contactor control circuit U-V's, but be parallel with three couples of normally opened contact PLC, KA, KT in the control circuit that energy-saving appliance A end connects, provide the control signal of automation separately respectively by it, their in parallel drawing in Fig. 2 are in order to illustrate that the automatic energy saving device can be widely used in the contactor control loop under the different separately automation control signals.PLC is the output normally opened contact of programmable controller internal memory, and KA is the auxiliary relay normally opened contact, and KT is the closed normally opened contact of time relay on-delay.

The operation principle of the utility model A.C. contactor automatic energy saving device is:

When pressing SB ₁Or the arbitrary normally opened contact closure among PLC, KA, the KT, this circuit promptly gets electric, and power supply is through C ₂After the step-down, diode is by VD ₃～VD ₆The bridge circuit of forming carries out rectification, and rectification is after R ₁Step-down, VD ₂Voltage stabilizing, C ₄After the filtering, to by midget relay K, K ₁, triode VT ₁, diode VD ₂, resistance R ₂The midget relay control loop that constitutes and by resistance R ₂～R ₄, capacitor C ₃And triode VT ₂The time delayed turn-off loop that is connected into provides the DC power supply of about 5V, and positive source forms path through 5V midget relay coil K and VT, the C utmost point, gives VT ₁The C utmost point adds reverse bias, through R ₂Give VT ₁Add the base stage forward bias, make circuit at power connection moment VT ₁With regard to conducting, make midget relay coil K pass through VT ₁The C-e utmost point and 5V power supply form path, and midget relay gets electric adhesive, its normally opened contact K on alternating current path ₁Closure, A.C. contactor solenoid KM is electricly instantaneous, the contactor adhesive, this moment, power supply was through A point → B point → KM → C point → K ₁→ D point forms alternating current path, solenoid KM, by the midget relay normally opened contact K that connects with it ₁Provide instantaneous adhesive required rated voltage to contactor.At R ₂Give VT ₁Also give VT when adding the forward base bias voltage ₂The C utmost point adds reverse bias.R ₃Give VT ₂Base stage adds forward bias voltage, but because capacitor C ₃Existence, VT ₂Conducting at once, R ₃, C ₃Form the time-delay charge circuit, make the 5V power supply through R ₃To C ₃Charging (about 2 seconds of charging interval) treats that its charging voltage reaches VT ₂(silicone tube 0.6～0.7v) VT when conduction is pressed ₂Conducting.Because VT ₂The C utmost point is connected on VT ₁The b utmost point, and VT ₂The e utmost point is connected on the earth potential again, so VT ₂Conducting just makes VT ₁Lose base bias and end.Thereby make midget relay coil K lose 5V voltage, make midget relay discharge the normally opened contact K on its alternating current path ₁Disconnect, this moment, power supply was through A point → B point → KM → C point → capacitor C ₁→ D point forms the step-down alternating current path, and A.C. contactor solenoid KM is by series capacitors C with it ₁Provide the current/voltage after the contactor closure, at this moment because capacitor C ₁The step-down metering function, the current/voltage that solenoid KM is flow through reduces greatly and reduces, thereby has reached the step-down current limliting and saved energy

The purpose in source.

The utility model A.C. contactor automatic energy saving device and various model A.C. contactor coupling are used in the motor testing circuit, and its energy-saving effect sees attached list 1.

Subordinate list 1

The advantage of the utility model A.C. contactor automatic energy saver is:

1, can save a large amount of electric energy, adopt energy-saving appliance can make the A.C. contactor energy consumption descend nearly 2/3.

2, applied widely, applicable to all kinds A.C. contactor, both can be used for A.C. contactor manual ringing control circuit, can be used for the automatic signal control circuit again.

Claims

1, a kind of A.C. contactor automatic energy saving device is loaded in the guard shield by auto power down circuit and constitutes, and 4 external connection end A, B, C, D are arranged, and it is characterized in that: by capacitor C ₁～C ₄Resistance R ₁～R ₄, diode rectifier bridge VD ₃～VD ₆, diode VD ₁, voltage-stabiliser tube VD ₂, midget relay coil K and contact K thereof ₁, triode VT ₁, VT ₂Be connected into auto power down circuit; Auto power down circuit has 4 external connection end A, B, C, D, C ₂Connect end altogether for A, B, C with the end that connects altogether of KM ₁With K ₁And the end that connects altogether of KM is C end, rectifier bridge VD ₃～VD ₆One end and C ₁, K ₁The end that connects altogether hold for D.

2, A.C. contactor automatic energy saving device according to claim 1, it is characterized in that itself and connecting of A.C. contactor and control circuit thereof be: the B of automatic energy saving device, C end connects with ac contactor coil KM two ends respectively, and the A of automatic energy saving device, D hold and be serially connected in the ac contactor control circuit.