CN2079352U - Electromagnetic high-efficient energy-saving controller - Google Patents

Abstract

The utility model relates to a circuit for supplying excitation current to the electromagnetic switches such as an alternating current contactor, a magnetic starter, etc. The utility model is composed of a starting current circuit (1), a holding current circuit (2) and a starting current automatic switchover control circuit (3). The utility model changes the electromagnetic coil of the electromagnetic switch into direct current holding from AC operation, so that the utility model can save electric power greatly, decrease the operating temperature of the electromagnetic coil, enhance the service life of the electromagnetic switch and the power factor, eliminate the AC noise and can reliably start the electromagnetic switch frequently. The manufacturing cost of the utility model is lower than that of the similar device adopting high power controllable silicon.

Description

Electromagnetic high-efficient energy-saving controller

The utility model relates to a kind ofly provides the circuit arrangement of exciting curent to electromagnetic switch, further is meant the high-efficient energy-saving controller that the solenoid of electromagnetic switch such as A.C. contactor and magnetic starter is changed into the direct current sticking by alternating current operation.

Electromagnetic switch such as widely used A.C. contactor and magnetic starter in the industrial production, the general direct use electric main of its solenoid, copper loss, iron loss and reactive loss etc. are bigger during operation, solenoid burns easily because of the big temperature rise of energy consumption, and AC noise along with increase running time and the armature adhesive bad and become big gradually.In order to cut down the consumption of energy and to eliminate AC noise, the direct current supply of using instead is also arranged, but generally have the circuit structure complexity again and cost is higher and problem such as unsuitable frequent starting.The application number of this case applicant patent applied for and bulletin is 89211957.8 " electromagnetic switch high-efficient energy-saving controller ", has the remarkable advantage that economizes on electricity significantly and reduce temperature rise and noise, but because the circuit of this controller adopts a more powerful controllable silicon, when the electromagnetic switch of the big electric current of control 250A to 600A, controllable silicon makes the cost of circuit arrangement too high greatly because of power.

The purpose of this utility model, provide a kind of high-efficient energy-saving controller that the solenoid of electromagnetic switch such as A.C. contactor and magnetic starter is changed into the direct current sticking by alternating current operation, to economize on electricity, to reduce operating temperature significantly and to eliminate AC noise, frequent starting electromagnetic switch reliably, and when the electromagnetic switch of the big electric current of control 250A to 600A, the cost of circuit arrangement is not high.

The solution of this high-efficient energy-saving controller can be referring to Fig. 1 the utility model electricity functional-block diagram.Its circuit part still is 89211957.8 application case as application number, the power supply circuits of solenoid CJ are divided into the starting current circuit (1) that is in parallel and keep current circuit (2) two parts, a starting current automatic switching control circuit (3) also is set simultaneously supplies with starting current circuit (1) with the automatic switchover control signal, the realization electromagnetic switch starts under full voltage and works under low-voltage.Feature part of the present utility model is the special starting current automatic switching control circuit of project organization (3), starting current circuit (1) and keeps current circuit (2).

Below in conjunction with drawings and Examples the utility model is described in detail.

Fig. 1 is the utility model electricity functional-block diagram;

Fig. 2 is the utility model physical circuit schematic diagram.

Referring to Fig. 1 and Fig. 2, starting current automatic switching control circuit (3) is by direct current relay J ₁With J ₂Line bag, J ₁Normally-closed contact J _1-1, diode D ₄With D ₅And capacitor C ₂With C ₃Form, starting current circuit (1) is by diode D ₁And J ₂Normally opened contact J _2-1With J _2-2Form, keep current circuit (2) by exchanging protector RX, power transformer KB, diode D ₂With D ₃, J ₁Normally opened contact J _1-2, J ₂Normally-closed contact J _2-3And capacitor C ₁Form.The A.C. contactor that CJ is connected when being the utility model work or the solenoid of magnetic starter.After energized, AC power

(220V or 380V) is added on the former side of transformer KB, and the voltage of its auxiliary winding is through D ₄And D ₅After the full-wave rectification, give J ₁And J ₂Power supply almost makes J simultaneously ₁And J ₂Quick pick-up.At J ₁And J ₂In the time of adhesive, J _2-1With J _2-2And J _1-2Closure makes AC power Through D ₁Provide direct current to start high pressure and starting current to CJ after the halfwave rectifier, meanwhile, the voltage of KB auxiliary winding is through D ₂And D ₃Also supply with CJ after the full-wave rectification simultaneously with exciting curent, so make electromagnetic switch under total head, start with being in parallel.After electromagnetic switch starts, because J ₁Adhesive and make its normally-closed contact J _1-1Disconnect, so supply with J ₂DC power supply be disconnected, but since this moment C ₃Charge, it can be at J _1-1Pass through J under the situation about disconnecting ₂Discharge, feasible closed J _2-1And J _2-2Can very fast disconnection, to guarantee the reliable startup of electromagnetic switch.By the time C ₃To J ₂Discharge off, J ₂Just discharge, make J because of dead electricity _2-1And J _2-2Disconnect, but this moment electromagnetic switch adhesive is firm, solenoid CJ only relies on D ₂With D ₃Rectification low pressure supply with exciting curent, just be enough to continue to keep the firm adhesive of electromagnetic switch.After AC power disconnected, the CJ decompression disconnected electromagnetic switch, and the electromotive force that this moment, CJ had is through normally-closed contact J _2-3To C1 charging, C ₁Again to the CJ discharge, CJ is again to C again ₁Charging so repeatedly, makes the very fast elimination of direct current remanent magnetism of electromagnetic switch, to guarantee the reliable disconnection of electromagnetic switch, even frequent starting can not produce misoperation yet.The primary winding N of transformer KB ₁With secondary coil N ₂Ratio, can design according to actual conditions, with the needs of the electromagnetic switch that satisfies various current specification of 60A to 600A and voltage specification.

Electromagnetic switch logotypes such as the utility model and A.C. contactor and magnetic starter change solenoid into the direct current sticking by Alternating Current Power Supply, can economize on electricity more than 95%, have eliminated AC noise, and power factor is brought up to more than 0.95.Solenoid is in low pressure operation, and the little temperature rise of electric current is low, is difficult for burning, and has improved useful life.This device circuit is simple in structure, reliable working performance, and when the electromagnetic switch with the big electric current of 250A to 600A was used, manufacturing cost was lower than adopting silicon controlled installation cost of the same type.Its demagnetization performance is good, through test, is suitable for the frequent starting of electromagnetic switch 3000 times/hour.

Claims (1)

1, a kind of electromagnetic switch high-efficient energy-saving controller of exciting curent being provided for electromagnetic switch such as A.C. contactor and magnetic starter, comprise starting current circuit (1) and keep current circuit (2) two parts power supply circuits and supply with the starting current automatic switching control circuit (3) of starting current circuit (1) with the automatic switchover control signal, of the present utility model being characterised in that, starting current automatic switching control circuit (3) is by direct current relay J ₁With J ₂Line bag, J ₁Normally-closed contact J _1-1, diode D ₄With D ₅And capacitor C ₂With C ₃Form, starting current circuit (1) is by diode D ₁And J ₂Normally opened contact J _2-1With J _2-2Form, keep current circuit (2) by exchanging protector RX, power transformer KB, diode D ₂With D ₃, J ₁Normally opened contact J _1-2, J ₂Normally-closed contact J _2-3And capacitor C ₁Form.

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