CN2427012Y - Energy-saving protector for AC contactor - Google Patents
Energy-saving protector for AC contactor Download PDFInfo
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- CN2427012Y CN2427012Y CN 00228518 CN00228518U CN2427012Y CN 2427012 Y CN2427012 Y CN 2427012Y CN 00228518 CN00228518 CN 00228518 CN 00228518 U CN00228518 U CN 00228518U CN 2427012 Y CN2427012 Y CN 2427012Y
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Abstract
The utility model relates to an AC contactor energy-saving protector provided with energy-saving protective functions, which is used by electrical apparatus elements. The utility model is composed of a reduced and stabilized voltage circuit, a large-current attracting delay control circuit, a small direct current clamping control circuit, and an AC contactor coil control circuit. When the power is switched on, the large-current attracting delay control circuit provides delay control signals to the AC contactor coil control circuit, and the delay control signals are needed when the lager-current of the alternating current contactor is attracting; when the attracting delay is passed, the small direct current clamping control circuit provides small direct current control signals needed when the alternating current contactor is attracting; the small direct current attracting of the alternating current contactor realizes the energy-saving operation of the alternating current contactor.
Description
The utility model relates to a kind of alternating-current contactor energy-saving protector of energy-saving protective of electric elements.
At present, A.C. contactor owing to safe in utilization, control is convenient, all more satisfactory long-range and automatic control switch that is widely used in various single, the three-phase electric apparatus equipment in industry and other production fields of various electric properties.A.C. contactor is in routine is used, because operating current is big during operation, the electric energy of gross power about 92% all is lost in magnetic hysteresis, eddy current, reaches on the short-circuited conducting sleeve, the meritorious power consumption major part of coil also becomes heat and loses, and in addition, sticking and startup are unstable, vibration noise is big, weak heat-dissipating makes A.C. contactor damage easily, has shortened the useful life of A.C. contactor.
The purpose of this utility model provides a kind of alternating-current contactor energy-saving protector; not only price is low for it; simple in structure; convenient and practical; simultaneously; the A.C. contactor that the alternating-current contactor energy-saving protector has been installed is in operation owing to take big electric current adhesive; the working method of little direct current sticking; therefore; power consumption during the A.C. contactor operation is very little; the friction noise; improved the adhesive performance, solved the phenomenon that when peak of power consumption A.C. contactor is difficult to normal adhesive and sticking, it is lonely that contact can not produce electricity; A.C. contactor is played the running protection effect, prolonged the service time of A.C. contactor.
The utility model is made up of decompression voltage regulator, big electric current adhesive delay control circuit, little direct current sticking control circuit and ac contactor coil control circuit, and decompression voltage regulator is made up of capacitor C 3, C5, resistance R 4, diode D2, D3 and voltage-stabiliser tube Dw; The ac control power supply Vac of ac contactor coil after the voltage-stabiliser tube Dw voltage stabilizing, is divided into two tunnel outputs by capacitor C 5 step-downs, diode D3 halfwave rectifier; One the tunnel directly provides Voltage pulsating direct-current supply to little direct current sticking control circuit; Another road is provided the galvanic current source to big electric current adhesive delay control circuit after capacitor C 3 filtering after isolating by diode D2; Resistance R 4 provides discharge loop to capacitor C 5.Big electric current adhesive delay control circuit by resistance R 1, capacitor C 1, C2, diode D1, D5, be connected into monostable time-base integrated circuit 555 and form, isolate afterwards high level time delayed signal required when the ac contactor coil control circuit provides A.C. contactor CJ adhesive by diode D5.Little direct current sticking control circuit is formed typical thyristor gating circuit by resistance R 2, R3, semifixed resistor W1, capacitor C 4, diode D4 and unijunction transistor BT1; Controllable silicon BT2 in the ac contactor coil control circuit provides the output scun the moving required triggering signal of direct current, this triggering signal is isolated back and the high level time delayed signal stack that big electric current adhesive delay control circuit provides by diode D4, provides control signal to the ac contactor coil control circuit jointly.The ac contactor coil control circuit is made up of one-way SCR BT2, capacitor C 6, diode D6; One-way SCR BT2 is saturation conduction under the high level time delayed signal effect that big electric current adhesive delay control circuit provides; the half-wave DC of required big electric current when A.C. contactor CJ coil provides adhesive; capacitor C 6 provides reverse-voltage protection for one-way SCR BT2, and diode D6 provides continuous current circuit for A.C. contactor CJ coil.Between the high level signal time delay, controllable silicon BT2 saturation conduction, required big electric current when the coil of A.C. contactor CJ provides adhesive; After the high level signal time-delay, provide the pulse triggering signal of the little angle of flow by little direct current sticking control circuit to controllable silicon BT2, thereby realize providing the required pulsation of sticking little direct current to A.C. contactor CJ coil by controllable silicon BT2.
Owing to taked such scheme; the alternating-current contactor energy-saving protector is with the required big electric current adhesive of A.C. contactor operation; the power save mode work of little direct current sticking; guaranteed little power consumption operation of A.C. contactor; thereby realized that the A.C. contactor adhesive is rapid; sticking is stable, energy-saving run, the purpose that increases the service life.
Below in conjunction with drawings and Examples the utility model is described further:
Fig. 1 is a functional-block diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Fig. 3 is another circuit theory diagrams of the present utility model.
Fig. 4 is the circuit theory diagrams of embodiment of the present utility model.
Fig. 5 is the circuit theory diagrams of another embodiment of the present utility model.
As shown in Figure 2, the utility model is made up of decompression voltage regulator, big electric current adhesive delay control circuit, little direct current sticking control circuit and ac contactor coil control circuit.Decompression voltage regulator is made up of capacitor C 3, C5, resistance R 4, diode D2, D3 and voltage-stabiliser tube Dw; Decompression capacitor C5 is in parallel with discharge resistance R4, one end of capacitor C 5 is connected with the end of the ac control power supply Vac of ac contactor coil, the other end of capacitor C 5 links together with the negative electrode of rectifier diode D3 and the negative electrode of voltage stabilizing didoe Dw respectively, the anode of the anode of rectifier diode D3 and voltage stabilizing didoe Dw links together with the other end of the ac control power supply Vac of ac contactor coil respectively, form common, rectifier diode D3 thinks that decompression capacitor C5 provides the mode of afterflow to realize halfwave rectifier.The ac control power supply Vac of ac contactor coil after the voltage-stabiliser tube Dw voltage stabilizing, is divided into two tunnel outputs by capacitor C 5 step-downs, diode D3 halfwave rectifier; One the tunnel directly provides Voltage pulsating direct-current supply to little direct current sticking control circuit; Another road is provided the galvanic current source to big electric current adhesive delay control circuit after capacitor C 3 filtering after isolating by diode D2; Resistance R 4 provides discharge loop to capacitor C 5.Big electric current adhesive delay control circuit by resistance R 1, capacitor C 1, C2, diode D1, D5, be connected into monostable time-base integrated circuit 555 and form; One end of resistance R 1 is with after an end of capacitor C 1 is connected, be connected with reset terminal TH (high level resets) with the set end TR (low level set) of ic 555 respectively, the positive pole of another termination DC power supply of resistance R 1, another termination common of capacitor C 1, form the RC charge-discharge circuit, for time-base integrated circuit 555 provides delay triggering signal.When the ac control power supply Vac of ac contactor coil connects because the voltage Vc1 at capacitor C 1 two ends can not suddenly change, at this moment Vc1＜
Vdd, time-base integrated circuit 555 is set, at output OUT output high potential signal, this high potential signal extend to always the voltage Vc1 at capacitor C 1 two ends＞
Only, the time was about t=1.1RC during the court of a feudal ruler of this high potential signal when 555 time-base integrated circuits were reset during Vdd; This high potential signal is isolated back high level time delayed signal required when the ac contactor coil control circuit provides A.C. contactor CJ adhesive by diode D5, and diode D1 is in parallel with resistance R 1, for capacitor C 1 provides discharge loop.Little direct current sticking control circuit is formed the adjustable circuits for triggering of typical thyristor operating angle by resistance R 2, R3, semifixed resistor W1, capacitor C 4, diode D4 and unijunction transistor BT1, the triggering signal of the required little direct current of pulsation when the ac contactor coil control circuit provides A.C. contactor CJ sticking, this triggering signal is isolated back and the high level time delayed signal stack that big electric current adhesive delay control circuit provides by diode D4, provides control signal to the ac contactor coil control circuit jointly.The ac contactor coil control circuit is made up of one-way SCR BT2, capacitor C 6, diode D6; The negative electrode of one-way SCR BT2 is connected with common, and anode is that A.C. contactor CJ coil is connected with the other end of the non-common of the ac control power supply Vac of ac contactor coil by load; One-way SCR BT2 is saturation conduction under the high level time delayed signal effect that big electric current adhesive delay control circuit provides, the output half-wave DC, because the D.C. resistance of A.C. contactor CJ coil is very little, so, the enough big electric currents required when A.C. contactor CJ coil provides adhesive of half-wave DC electric energy of the one-way SCR BT2 output of saturation conduction; Capacitor C 6 is in parallel with one-way SCR BT2, and BT2 provides reverse-voltage protection for one-way SCR; The anode of diode D6 is connected with the anode of one-way SCR BT2, the negative electrode of diode D6 is connected with the other end of the non-common of the ac control power supply Vac of ac contactor coil, and, diode D6 and A.C. contactor CJ coils from parallel connection of coils are for A.C. contactor CJ coil provides continuous current circuit.Between the high level signal time delay, one-way SCR BT2 saturation conduction, required big electric current when A.C. contactor CJ coil provides adhesive; After the high level signal time-delay, provide the pulse triggering signal of the little angle of flow by little direct current sticking control circuit to one-way SCR BT2, thereby realize providing the required pulsation of sticking little direct current to A.C. contactor CJ coil by one-way SCR BT2.
Because the AC impedance of large-scale high power AC contactor coil is less, D.C. resistance is littler, if also use the direct current adhesive, does not meet the safe handling regulation, so, should use the control mode of the little direct current sticking of alternating current adhesive.As shown in Figure 3, the control mode of big direct current adhesive is replaced by the control mode that exchanges adhesive, thereby realization is gone to control the purpose of large-scale A.C. contactor by low power control element.
As can be seen from Figure 3, increased by a route one-way SCR BT3 in the ac contactor coil control circuit and controlled the control circuit that small-sized A.C. contactor CJ2 reaches provides the diode D7 of afterflow to form for small-sized A.C. contactor CJ2.The negative electrode of one-way SCR BT3 is connected with common, anode is connected with an end of small-sized A.C. contactor CJ2 coil, the other end of small-sized interchange contact CJ2 coil is connected with the other end of the non-common of the ac control power supply Vac of ac contactor coil, the coils from parallel connection of coils of diode D7 and small-sized A.C. contactor CJ2 is for it provides afterflow; In parallel after the normally closed main contacts CJ2-1 of small-sized A.C. contactor CJ2 connects with diode D6 with the pull-in winding of large-scale A.C. contactor CJ1, for it provides afterflow; Small-sized A.C. contactor CJ2 often to open main contacts CJ2-2 in parallel with one-way SCR BT2, realize the interchange adhesive control of large-scale A.C. contactor CJ1.The diode D5 isolation back required high level time delayed signal when the ac contactor coil control circuit provides adhesive that passes through in the big electric current adhesive delay control circuit is no longer controlled one-way SCR BT2, but be connected with the trigger electrode of one-way SCR BT3 by the negative electrode of isolating diode D5, end after the conducting time-delay of control one-way SCR BT3, thereby the control of the adhesive time-delay back tripping operation by the small-sized A.C. contactor CJ2 main contact of control realizes after the interchange adhesive of large-scale A.C. contactor CJ1 the purpose by the little direct current sticking of pulsation.
In the embodiment shown in fig. 4, when pressing starting button QA, AC power Vac divides two tunnel inputs; One the tunnel through the ac contactor coil control circuit, because the capacity of capacitor C 6 is less, the electric current that passes through is very little, can not make A.C. contactor CJ adhesive; Two tunnel outputs by diode D3 halfwave rectifier, after voltage stabilizing didoe Dw voltage stabilizing, are divided by capacitor C 5 step-downs in another road.Wherein one road Rectified alternating current provides the half-wave DC power supply with the frequency homophase with AC power Vac to the little direct current sticking control circuit of being made up of unijunction transistor BT1 circuits for triggering, by the adjustable triggering signal of the unijunction transistor BT1 circuits for triggering output control one-way SCR BT2 angle of flow, because the angle of flow of one-way SCR BT2 is less, the small pulsating direct current electric current of output also deficiency so that A.C. contactor CJ adhesive; After another road Rectified alternating current is isolated by diode D2, by capacitor C 3 filtering, to forming big electric current adhesive delay control circuit the galvanic current source is provided by being connected into monostable 555 time-base integrated circuits.Monostable 555 time-base integrated circuits capacitor C 1 by resistance R 1 charge to Vc1＞
Vdd during this period of time in the output high level signal, after this signal is isolated by diode D5, trigger one-way SCR BT2 saturation conduction, required big electric current when A.C. contactor CJ coil provides adhesive; After the high level signal time-delay, the pulse triggering signal of the little angle of flow is provided to one-way SCR BT2 by little direct current sticking control circuit, provide sticking required little direct current to A.C. contactor CJ coil, thereby make A.C. contactor realize big electric current adhesive, the purpose of little direct current sticking.
In the embodiment shown in fig. 5, when pressing starting button QA, AC power Vac divides two tunnel inputs; One the tunnel through the ac contactor coil control circuit, because the capacity of capacitor C 6 is less, the electric current that passes through is very little, can not make large-scale A.C. contactor CJ1 adhesive; Two tunnel outputs by diode D3 halfwave rectifier, after voltage stabilizing didoe Dw voltage stabilizing, are divided by capacitor C 5 step-downs in another road.Wherein one road Rectified alternating current provides the half-wave DC power supply with the frequency homophase with AC power Vac to the little direct current sticking control circuit of being made up of unijunction transistor BT1 circuits for triggering, by the adjustable triggering signal of the unijunction transistor BT1 circuits for triggering output control one-way SCR BT2 angle of flow, because the angle of flow of one-way SCR BT2 is less, the small pulsating direct current electric current of output is also not enough so that large-scale A.C. contactor CJ1 adhesive; After another road Rectified alternating current is isolated by diode D2, by capacitor C 3 filtering, to forming big electric current adhesive delay control circuit the galvanic current source is provided by being connected into monostable 555 time-base integrated circuits.Monostable 555 time-base integrated circuits capacitor C 1 by resistance R 1 charge to Vc1＞
The interior during this period of time output high level signal of Vdd, after this signal is isolated by diode D5, the saturation conduction of control one-way SCR BT3, required big electric current when small-sized A.C. contactor CJ2 coil provides adhesive, thereby make the coil adhesive of small-sized A.C. contactor CJ2, the normally closed main contacts CJ2-1 of small-sized A.C. contactor CJ2 disconnects earlier, often opening main contacts CJ2-2 just and then connects, at this moment, the coil of large-scale A.C. contactor CJ1 is often opened main contacts CJ2-2 and AC power Vac formation ac circuit by what small-sized A.C. contactor CJ2 connected, realizes the interchange adhesive of large-scale A.C. contactor CJ1.After the high level signal time-delay of the output of monostable 555 time-base integrated circuits in the big electric current adhesive delay control circuit, one-way SCR BT3 becomes cut-off state from saturation conduction, the coil of small-sized A.C. contactor CJ2 is owing to dead electricity trips, the ac circuit of large-scale A.C. contactor CJ1 coil is disconnected, at this moment, small pulsating direct current electric current by unijunction transistor BT1 circuits for triggering control one-way SCR BT2 output makes large-scale A.C. contactor CJ1 keep adhesive, realizes after the interchange adhesive of large-scale A.C. contactor CJ1 the purpose by the little direct current sticking of pulsation.
Claims (2)
1, a kind of alternating-current contactor energy-saving protector, it is made up of decompression voltage regulator, big electric current adhesive delay control circuit, little direct current sticking control circuit and ac contactor coil control circuit, it is characterized in that:
Decompression voltage regulator is by capacitor C 3, C5, resistance R 4, diode D2, D3 and voltage-stabiliser tube Dw form, decompression capacitor C5 is in parallel with discharge resistance R4, one end of capacitor C 5 is connected with the end of the ac control power supply Vac of ac contactor coil, the other end of capacitor C 5 links together with the negative electrode of rectifier diode D3 and the negative electrode of voltage stabilizing didoe Dw respectively, the anode of the anode of rectifier diode D3 and voltage stabilizing didoe Dw links together with the other end of the ac control power supply Vac of ac contactor coil respectively, form common, rectifier diode D3 thinks that decompression capacitor C5 provides the mode of afterflow to realize halfwave rectifier; The ac control power supply Vac of ac contactor coil after the voltage-stabiliser tube Dw voltage stabilizing, is divided into two tunnel outputs by capacitor C 5 step-downs, diode D3 halfwave rectifier; One the tunnel directly provides Voltage pulsating direct-current supply to little direct current sticking control circuit, and another road is provided the galvanic current source to big electric current adhesive delay control circuit after capacitor C 3 filtering after isolating by diode D2, and resistance R 4 provides discharge loop to capacitor C 5;
Big electric current adhesive delay control circuit by resistance R 1, capacitor C 1, C2, diode D1, D5, be connected into monostable time-base integrated circuit 555 and form, one end of resistance R 1 is with after an end of capacitor C 1 is connected, be connected with reset terminal TH (high level resets) with the set end TR (low level set) of ic 555 respectively, the positive pole of another termination DC power supply of resistance R 1, another termination common of capacitor C 1 is formed the RC charge-discharge circuit; Diode D1 is in parallel with resistance R 1, for capacitor C 1 provides discharge loop; The output that is connected into monostable time-base integrated circuit 555 is isolated the high level delay control signal of back required big electric current when the ac contactor coil control circuit provides adhesive by diode D5;
The adjustable circuits for triggering of typical thyristor operating angle that little direct current sticking control circuit is made up of resistance R 2, R3, semifixed resistor W1, capacitor C 4, diode D4 and unijunction transistor BT1, the control signal of the required little direct current of pulsation when the ac contactor coil control circuit provides sticking, this triggering signal is isolated the back by diode D4 and is superposeed with the high level time delayed signal that big electric current adhesive delay control circuit provides, and common one-way SCR BT2 in the ac contactor coil control circuit provides triggering signal;
The ac contactor coil control circuit is by one-way SCR BT2, capacitor C 6, diode D6 forms, the negative electrode of one-way SCR BT2 is connected with common, anode is that A.C. contactor CJ coil is connected with the other end of the non-common of the ac control power supply Vac of ac contactor coil by load, capacitor C 6 is in parallel with one-way SCR BT2, BT2 provides reverse-voltage protection for one-way SCR, the anode of diode D6 is connected with the anode of one-way SCR BT2, the negative electrode of diode D6 is connected with the other end of the non-common of the ac control power supply Vac of ac contactor coil, and, diode D6 and A.C. contactor CJ coils from parallel connection of coils are for A.C. contactor CJ coil provides continuous current circuit;
2, a kind of alternating-current contactor energy-saving protector according to claim 1 is characterized in that the semi-wave DC attracting mode in the described ac contactor coil control circuit can be replaced by the alternating current attracting mode that low power control element goes to control the high power AC contactor; In the ac contactor coil control circuit, increased by a route one-way SCR BT3 and controlled the control circuit that small-sized A.C. contactor CJ2 reaches provides the diode D7 of afterflow to form for small-sized A.C. contactor CJ2;
The negative electrode of one-way SCR BT3 is connected with common, anode is connected with an end of small-sized A.C. contactor CJ2 coil, the other end of small-sized interchange contact CJ2 coil is connected with the other end of the non-common of the ac control power supply Vac of ac contactor coil, the coils from parallel connection of coils of diode D7 and small-sized A.C. contactor CJ2 is for it provides afterflow; In parallel after the normally closed main contacts CJ2-1 of small-sized A.C. contactor CJ2 connects with diode D6 with the pull-in winding of large-scale A.C. contactor CJ1, for it provides afterflow; Small-sized A.C. contactor CJ2 often to open main contacts CJ2-2 in parallel with one-way SCR BT2, the diode D5 isolation back required high level time delayed signal when the ac contactor coil control circuit provides adhesive that passes through in the big electric current adhesive delay control circuit is no longer controlled one-way SCR BT2, but is connected with the trigger electrode of one-way SCR BT3 by the negative electrode of isolating diode D5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00228518 CN2427012Y (en) | 2000-06-19 | 2000-06-19 | Energy-saving protector for AC contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00228518 CN2427012Y (en) | 2000-06-19 | 2000-06-19 | Energy-saving protector for AC contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2427012Y true CN2427012Y (en) | 2001-04-18 |
Family
ID=33591977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00228518 Expired - Fee Related CN2427012Y (en) | 2000-06-19 | 2000-06-19 | Energy-saving protector for AC contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2427012Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950709A (en) * | 2010-09-17 | 2011-01-19 | 上海诺雅克电气有限公司 | Low-voltage holding contactor |
| CN102097778A (en) * | 2011-02-11 | 2011-06-15 | 上海诺雅克电气有限公司 | Energy-saving undervoltage/overvoltage protective device |
-
2000
- 2000-06-19 CN CN 00228518 patent/CN2427012Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950709A (en) * | 2010-09-17 | 2011-01-19 | 上海诺雅克电气有限公司 | Low-voltage holding contactor |
| CN101950709B (en) * | 2010-09-17 | 2013-05-01 | 上海诺雅克电气有限公司 | Low-voltage holding contactor |
| CN102097778A (en) * | 2011-02-11 | 2011-06-15 | 上海诺雅克电气有限公司 | Energy-saving undervoltage/overvoltage protective device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |