CN2137026Y - Low-pressure starting regulation protector - Google Patents

Abstract

The utility model relates to a low-pressure starting regulation protector, comprising an alternating current contactor, a magnetic starter, the low-voltage attraction of an electromagnetic attracting coil with an electromagnetic valve and a regulation protector for generating super low voltage to retain voltage. The utility model can solve the problems of no tight attraction, intense vibration, noise and electric arc when alternate current supplies power. The attracting voltage can be lowered to 120V; the retaining voltage is 3-4V; the retaining electric current is 20 mA; the energy consumption is reduced to 1 % of the original alternate current power supply. The utility model can be directly arranged at the contactors of CJ 10-20 and CJ 10-40 to become a new generation of the alternating current contactor, the electromagnetic valve and the electromagnetic starter.

Description

Low-pressure starting regulation protector

The utility model belongs to electric field, is used in the protective device of the automatic adjusting trouble free service of electromagnetism pull-in windings such as A.C. contactor, relay, magnetic starter, electromagnetically operated valve.

The A.C. contactor of present domestic use, relay, magnetic starter, electromagnetically operated valve, the general device that does not all have shock absorbing, eliminated noise.According to introducing in Zhejiang University's " electrotechnics " teaching material: adopt the copper ring that has path at the termination of iron core setting-in one of one's own, the common name short-circuited conducting sleeve reaches the effect of damping and reduction AC noise.But pick-up voltage and operating voltage can not be reduced, the suction-combining force can not be strengthened, opposite because eddy current has increased energy consumption; It is tight to solve working position adhesives such as contactor, causes phenomenons such as electric arc, burn even contact generation melting welding.When peak of power consumption, under the situation that supply voltage reduces, cause to inhale and press deficiency, often have an accident, even stop work.Therefore the user who has adopts voltage regulating transformer that input voltage is transferred to normally, and the contactor electromagnetic system is carried out the work.Yet supply voltage often changes, and when supply voltage is excessive, often makes contact melting welding.Voltage regulating transformer is not only heavy, and difficulty is installed, and inconvenient operation equally can not damping and reduce noise, and operation must be by manually carrying out.

The purpose of this utility model: the one, when solving peak of power consumption, supply voltage reduces and causes electromagnetic system job insecurity problems such as contactor, relay, magnetic starter, electromagnetically operated valve; The 2nd, for solving the magnetic flux cyclic variation that causes owing to exchanging, vibrations and AC noise that the suction-combining force cyclic variation is caused.The 3rd, closely do not cause phenomenons such as electric arc for solving adhesive; The 4th, for solving pick-up voltage, operating voltage, operating current is big, energy loss is big problem; The 5th, for solving the big problem of A.C. contactor equal-volume, protect device thereby designed low pressure starting adjusting protector, can achieve the above object effectively.

The technical solution of the utility model is in the composition and the supply power mode that do not change original A.C. contactor, magnetic starter, electromagnetically operated valve etc., makes electromagnetic system be converted to direct current supply by Alternating Current Power Supply.The low pressure starting is regulated protector by four most of composition the, i.e. voltage stabilizing circuit, timing trigger circuit, pick-up voltage circuit and sustaining voltage circuit.As shown in Figure 1, one, voltage stabilizing circuit is made up of C1, R1, R2, D6, D7, C2 element, connect the alternating current 220V power supply, through C1 and step-down, by D6, D7 rectification, C2 filtering obtains the direct voltage about 7V at load R2 two ends, supply with the power supply of 555 time circuits.Two, timing trigger circuit is made up of D8, D9, R3, C3,555 time circuits, also available division element and other integrated circuits are formed, start back stabilized voltage power supply is to 555 power supplies, 6 of 555 time circuits, 2 pin are lower than 2/3rds supply voltage, and 3 pin output high level triggers D5 work through D9, by the D1-D4 circuit, make the JC electromagnetic system produce pick-up voltage.Behind the circuit working, C3 is charged by R3, when condenser voltage is charged to 2/3rds supply voltages, the upset of 555 time circuits, about 0.1 second, 555 time circuits, 3 pin output low levels, pick-up voltage disappears, and reaches low pressure starting and self-regulating function.Three, the pick-up voltage circuit is made up of D5, R4, D1-D4, JC, the D5(controllable silicon) also available transistor, field effect transistor, Darlington transistor, during by 555 time circuits, 3 pin output high level, D9 triggers D5, and the R4 current limliting is through the D1-D4 bridge rectifier, obtain the direct current pick-up voltage about 120V, directly drive the work of JC electromagnetic system.Four, sustaining voltage circuit, by the alternating current 220V power supply, C4, D1-D4 and JC form, in fact produce in the process that disappears at pick-up voltage, meanwhile alternating current 220V voltage is added to the direct voltage of the output 3-4V of D1-D4 bridge rectifier system through C4 step-down (also available transformer step-down), after pick-up voltage disappeared, this dc low-voltage just can be guaranteed the electromagnetic system operate as normal, just disappears up to deenergization.

The utility model has the advantages that: shortcomings such as the vibrations that produced when 1, having solved Alternating Current Power Supply, noise, adhesive are not tight, electric arc; 2, it is original 50～55% reducing pick-up voltage, can both make electromagnetic system operate as normal such as A.C. contactor when supply voltage is not less than 120V; 3, energy consumption is little, and it is original 25% that energy consumption is reduced to, and coil loss is original 1%.Originally sustaining voltage is 220 volts, holding current 90mA, and present operating voltage 3-4V, operating current 20mA; 4, because operating current is little, can select thinner enamelled wire coiling for use, save a large amount of raw material, the volume of contactor etc. is dwindled greatly, and the utility model can be directly installed in CJ10-20, the CJ10-40 contactor, external form is not changed, and becomes the A.C. contactor of a new generation, electromagnetic starter, electromagnetically operated valve; 5, easy for installation, moulding can be made various bodies according to different modes.

Fig. 1 is the utility model I structure principle chart, and when JC was high resistant, D5 was a bidirectional triode thyristor, and D9 is a resistance, and Fig. 2 is for adding this adjuster winding diagram.

According to the technical solution of the utility model embodiment of the present utility model is described below: be assembled in the little square box of 5 * 4 * 1cm by the figure I to the circuit element in the technique scheme, as Fig. 2, little square box is drawn four binding posts, 1,2 connects AC power (220V), 3,4 solenoid feed terminals that connect A.C. contactors such as CJ10-20 respectively, just can hear the action of adhesive rapidly when energized, can't hear AC noise, also not vibrations.Test data is as follows during according to test, when not using the utility model, and operating voltage, pick-up voltage is 206V, electric current 90mA; Pick-up voltage is reduced to 120V behind serial connection the utility model, and operating voltage is 3-4V, and operating current 20mA reaches above-mentioned effect.

Claims (1)

1, protector is regulated in the low pressure starting; it is characterized in that this protector is made of voltage stabilizing circuit, timing trigger circuit, pick-up voltage circuit and sustaining voltage circuit; voltage stabilizing circuit makes Jc produce pick-up voltage for timing trigger circuit the DC power supply that the 220V AC power becomes about 7V; disappear through about 0.1 second back pick-up voltage; the pick-up voltage that produces is worked through the direct voltage drive Jc that the pick-up voltage circuit becomes about 120V; when pick-up voltage disappears; the sustaining voltage circuit is exported the direct voltage of 3-4V, keeps the operate as normal of Jc.

Images