CN2210466Y - Energy saving device with an integral ac contact device - Google Patents

Abstract

The utility model relates to an integral power-saving device of an AC contactor, which relates to the technical field of power saving of an AC contactor electromagnetic system. The utility model is characterized in that the utility model is composed of a starting control circuit, a driving circuit, a holding circuit and a protective box for a circuit board. The utility model can be combined with a common AC contactor into integration to form an electromechanical integrated power-saving AC contactor which has the advantages of low power consumption, low noise, low temperature rise, convenient installation and operation.

Description

Energy saving device with an integral ac contact device

Have incorporate A.C. contactor battery saving arrangement, relate to the power-saving technique field of ac contactor electromagnetic system, especially adopt electronics battery saving arrangement and A.C. contactor to be combined into an integral body.

Utility model is arranged at present: the patent No. 89221260.8 in existing background technology, the electricity-saving type CJ20-160A double winding A.C. contactor of the patent No. 89211957.8 and domestic production, (refer to 89221260.8 and electricity-saving type CJ20-160A) that wherein has, need with auxiliary contact and the normally closed auxiliary contact of the special big excess of stroke does starting and holding course is changed, (89211957.8) that have need be connected in series current-limiting resistance with the restriction starting current in the loop, though in above-mentioned 89221260.8 and electricity-saving type CJ20-160A double winding A.C. contactor structurally accomplished integrated design, but because additional auxiliary contact often diminishes the overtravel of contact because of poor contact of contacts or after one section operation by mechanical wear, the former can make contactor start, the latter makes contactor just will start the failure of current of pull-in winding before also not having complete adhesive, the moving iron stamen of contactor rebounds because of dead electricity, cause the contactor starting failure, even spring occurs.The mechanical endurance of a contactor at least more than hundreds of thousands time, and to accomplish at present in hundreds of thousands time can both reliably working auxiliary contact be very difficult; The electricity-saving appliance that then a kind of utility model adopts the method for series limiting resistor to make when starting, exist the resistance that when the electricity-saving appliance of the big capacity contactor of design (referring to the above current class of 400A), just needs corresponding use larger volume, because of the volume of resistance and heating problem can only use as a kind of independent product electricity-saving appliance for user and A.C. contactor coupling, this is because contactor itself does not have bigger remaining space for the big electricity-saving appliance of installation volume, therefore equally also can't accomplish incorporate structural design, and separate type makes troubles for installation and use.

The purpose of this utility model provides a kind of battery saving arrangement that can be combined into an integral body with A.C. contactor, and it not only does conversion without contact when starting, nor with being connected in series current-limiting resistance.

The purpose of this utility model is achieved in that and adopts the electronic time-delay switch circuit to replace auxiliary contact in starting circuit, select the mode of phase pressure regulation to limit starting current with thyristor, saved current-limiting resistance, made and do not have high-power heater element in the electricity-saving appliance, also dwindled simultaneously volume, and make battery saving arrangement mix as a whole the assembling with A.C. contactor, satisfied the electromechanical integrated structure purpose of design, for user installation and use bring convenience, also improved reliability of operation simultaneously.Above-mentioned control circuit volume is very little, can be contained in the protecting in the box of plastics, and it is fastening to protect box by the screw on the operating coil skeleton, is placed on together in the base of contactor, and the course of work of circuit is such: as input L, N point incoming transport power supply, W ₂Open in about 0.1 second time and make the contactor adhesive driving thyristor Vs, turning on and off of thyristor Vs is controlled by electronic delay circuit, and during Vs opened, power supply was through diode D ₁, resistance R ₁To capacitor C ₁Charging, C at this moment ₁Both end voltage is less than thyristor V ₀Cut-in voltage, V ₀Not conducting.And by resistance R ₄Provide trigger current to driving thyristor Vs, Vs opens back starting winding W ₂Be subjected to electricity to make the contactor adhesive, diode D ₄Be starting winding W ₂The afterflow path.Work as C ₁Both end voltage rises to V gradually ₀Cut-in voltage the time, V ₀Conducting.V ₀To drive the short circuit of the thyristor Vs control utmost point after the conducting, Vs turn-offs behind current over-zero because of losing trigger current.Later sticking winding W ₁Continuation is by D ₃Holding current is provided after the halfwave rectifier, makes A.C. contactor keep the sticking state.

Owing to adopt such scheme, battery saving arrangement can be placed on plastics and protect on the housing that directly is fastened on contactor in the box and lump together with it, and have that volume is little, reliable operation, easy to install.

Below in conjunction with accompanying drawing and enforcement example the utility model is further specified.

Fig. 1 is circuit theory diagrams of the present utility model.

Fig. 2 is the circuit theory diagrams that battery saving arrangement adopts series capacitor.

Fig. 3 is the circuit theory diagrams that battery saving arrangement adopts step-down transformer.

Fig. 4 is the installation diagram that battery saving arrangement is placed on embodiment on the CJ20-630A A.C. contactor.

Fig. 5 is the installation diagram that battery saving arrangement is placed on first embodiment on the CJ20-160A A.C. contactor.

Fig. 6 is the installation diagram that battery saving arrangement is placed on second embodiment on the CJ20-160A A.C. contactor.

Fig. 7 is that the battery saving arrangement that has presser foot protects the box outline drawing.

Fig. 8 adopts double hook tension spring hook tension spring hook to hang over that battery saving arrangement protects the box outline drawing on the cold-drawn round steel axle.

1. electricity-saving appliance outputs, 2. operating coils 3. that go between protect box 4. electricity-saving appliance input terminals 5. double hook extension springs 6. cold-drawn round steel axles 7. operating coil lead-out wires 8. and protect box presser feet 9.U type conduction inserted sheet 10. junction blocks 11. junction block clench nails 12. double hook hanging holes among the figure

In Fig. 1, diode D ₁Positive pole meet power supply L, D ₁Negative pole connecting resistance R ₁, R ₄An end, R ₄Another termination drive the control utmost point of thyristor Vs, R ₁The other end and capacitor C ₁Anodal R ₂An end join C ₁Negative pole meet power supply N, R ₂The other end and R ₃Transistor V ₀Base stage join R ₃Another termination power N, V ₀The collector electrode and the Vs control utmost point join V ₀Emitter meets power supply N; Diode D ₂With C ₂Back in parallel positive pole meets power supply N, and negative pole connects the Vs control utmost point; Starting pull-in winding W ₂One termination power L, another termination thyristor Vs anode, the Vs negative electrode connects power supply N, sustained diode ₄And at W ₂Two ends; Holding coil W ₁After piezo-resistance RM is in parallel, a termination power L, another termination rectifier diode D ₃Positive pole, D ₃Negative pole meet power supply N.

In Fig. 2, decompression capacitor C ₀One termination power N, the other end and isolating diode D ₃Negative pole, sustained diode ₄Anodal connection, D ₃Positive pole meets contactor coil P, D ₄Negative pole connects with the contactor coil other end and power supply L; Owing to offer the R of thyristor Vs trigger current ₄Be connected on D ₁On the negative pole, rather than be connected on the anode of Vs, therefore can be all open-minded the Vs of many parallel connections reliably.If Vs trigger current in parallel can insert flows resistance when differing greatly in control extremely separately.When needs reduce the return time of contactor, as long as with C ₁Two ends and on the auxiliary normally closed interlock F of contactor, disconnect back normally closed interlock F immediately C at contactor ₁Electric energy stored bleeds off, and just can carry out the starting second time at once.This method is wanted external auxiliary contact, adopts at R ₂Last shunt regulator tube DW ₁Also play same purpose, its principle is to reduce C ₁The voltage at two ends, C after outage ₁Electric energy stored is at short notice just by R ₂, R ₃Put DW ₁Played quickening C ₁The effect of discharge.

In Fig. 3, elementary power supply L, the N of connecing of step-down transformer T, a secondary termination rectifier diode D ₃Negative pole, D ₃Positive pole connect the KM other end and D with fly-wheel diode positive pole, contactor coil KM ₄Negative pole meets power supply L, and diac DV one termination Vs controls the utmost point, the other end and D ₂Negative pole, C ₃, R ₄, V ₀Anode connects, C ₃The other end and D ₂Anodal, power supply N joins, because big Capacity AC Contactor transient starting electric current is bigger, therefore use and select the phase circuits for triggering, flow through the electric current of solenoid in the time of can reducing starting like this, also reduced simultaneously contactor when closed moment mechanical impact power, all favourable to the spring that reduces contact and mechanical endurance of improving contactor.

In the embodiment shown in fig. 4, the plastics that battery saving arrangement is housed protect the below that box 3 is placed on CJ20-630A A.C. contactor operating coil 2, by double hook extension spring 5 it is hooked on the cold-drawn round steel axle 6, adopt the fixing structure of extension spring hook owing to protect box 3, make the battery saving arrangement ability be subjected to bigger shock and vibration.

In the embodiment shown in fig. 5, to there be the battery saving arrangement of presser feet 8 structures to protect the below that box 3 is placed on CJ20-160A A.C. contactor junction block 10, as long as unclamp the trip bolt 11 on the junction block during installation, to protect that presser feet compresses on the box, two output U types conduction inserted sheets 9 of battery saving arrangement also play auxiliary fastening effect.

In the embodiment shown in fig. 6, the plastics that battery saving arrangement is housed protect in the base that box 3 is placed on contactor, and it is fastening to protect box by screw on the operating coil skeleton.

Claims (8)

1, has incorporate A.C. contactor battery saving arrangement, it is characterized in that starting the adhesive control circuit by D ₁, R ₁, R ₂, R ₃, R ₄, C ₁And transistor Vo constitutes: D ₁Positive pole meet power supply L, D ₁Negative pole meet R ₁R ₄An end, R ₄Another termination drive the control utmost point of thyristor Vs, R ₁The other end and C ₁Anodal R ₂An end join C ₁Negative pole meet power supply N, R ₂The other end and R ₃The base stage of transistor Vo is joined, R ₃Another termination power N, the Vo collector electrode and the Vs control utmost point join, and the Vo emitter meets power supply N, diode D ₂With C ₂Back in parallel positive pole meets power supply N, and negative pole connects the Vs control utmost point; Starting pull-in winding W ₂One termination power L, another termination thyristor Vs anode, the Vs negative electrode connects power supply N, sustained diode ₄And at W ₂Two ends; Holding coil W ₁A termination power L in parallel with piezo-resistance RM, another termination rectifier diode D ₃Positive pole, D ₃Negative pole meet power supply N.

2, device according to claim 1 is characterized in that voltage-stabiliser tube DM ₁Positive pole meet V ₀The base stage negative pole meet C ₁Positive pole.

3, device according to claim 1 is characterized in that the normally closed auxiliary contact F of contactor and at C ₁Two ends.

4, device according to claim 1 is characterized in that the below that box is placed on operating coil of protecting of battery saving arrangement by the double hook extension spring it being hooked on the cold-drawn round steel axle.

5, device according to claim 1, the box that protects that it is characterized in that having the battery saving arrangement of presser feet and U type conduction inserted sheet structure is placed on the junction block below, is fixed by junction block and binding post.

6, device according to claim 1 is characterized in that protecting in the base that box is placed on contactor of control circuit, and it is fastening to protect box by screw on the operating coil skeleton.

7, device according to claim 1 is characterized in that R ₄A termination D ₁Negative pole, Vs, D ₃, D ₄Can many parallel connections.

8, device according to claim 1 is characterized in that V ₀Can be VMOS pipe, thyristor and transistor.

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