CN2378824Y - DC controller for AC contactor - Google Patents

DC controller for AC contactor Download PDF

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Publication number
CN2378824Y
CN2378824Y CN 98201012 CN98201012U CN2378824Y CN 2378824 Y CN2378824 Y CN 2378824Y CN 98201012 CN98201012 CN 98201012 CN 98201012 U CN98201012 U CN 98201012U CN 2378824 Y CN2378824 Y CN 2378824Y
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China
Prior art keywords
voltage
low
contactor
direct current
operating circuit
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Expired - Fee Related
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CN 98201012
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Chinese (zh)
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孙国峰
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Individual
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Individual
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Abstract

The utility model relates to a DC controller for exchanging a contactor, particularly a DC controller. The DC controller is composed of a casing, a transformer and a circuit board, the inner part of the casing is provided with the transformer and the circuit board, and an input end, an output end, a switch and an indicator light are arranged on the casing. The circuit board is connected in series with a rectifier, a filter and a high and low-voltage DC-trigger operating circuit. The high-voltage and the low-voltage DC sources are formed by changing the voltage, rectifying and filtering the wave, the attracting is triggered by using the high voltage pulse and the stable attracting is maintained by using the low voltage, and the purpose that the AC contactor which works in safety stably and reliably under the influence of being free from the voltage fluctuation of an AC network is realized by using the direct current control is achieved. The utility model can be used for various AC contactors.

Description

The dc controller of A.C. contactor
The utility model relates to a kind of controller of A.C. contactor, particularly a kind of dc controller.
A.C. contactor is a kind of commonly used being specifically designed to remote frequent starting or controlling alternating current motor, and the low-voltage electrical apparatus of connecting normal main circuit of disjunction and control circuit.In actual use since A.C. contactor usually with the shared AC network of the big-and-middle-sized electric equipment of many frequent startings, the alternating voltage that therefore can offer A.C. contactor work often fluctuates very big, directly influencing the A.C. contactor safety and stability works reliably, in addition because the coil of A.C. contactor is in ac operation, energy consumption is big, coil is with hot temperature rise, and the vibration and the noise of the mechanical system of electromagnet and interlock thereof and the equal various degrees of major-minor contact, directly influence its machinery and electrical endurance.
The purpose of this utility model is to overcome the deficiencies in the prior art and provides dc controller by AC network power supply to A.C. contactor, to avoid the direct influence that the ac grid voltage fluctuation may cause to A.C. contactor work safety reliability, realization A.C. contactor safety and stability is worked reliably, also can reduce noise and energy consumption simultaneously.
The utility model is achieved in that the utility model is characterized in that being made up of controller housing, transformer and wiring board, and transformer and wiring board are installed in the controller housing, and input, output, switch and indicator light are arranged on the controller housing.There are rectifier, filter and high-low pressure direct current to trigger operating circuit on the wiring board, primary is connected to AC network, the input of rectifier on the secondary link plate of transformer, the input of the output termination filter of rectifier, the output of filter is connected to the input that the high-low pressure direct current triggers operating circuit, the high-low pressure direct current triggers operating circuit by high voltage direct current circuits for triggering and low-voltage direct operating circuit and be connected to the common output end of this controller, and common output end is connected on the actuating coil of A.C. contactor.By transformation, rectification and filtering, form high pressure and low-voltage direct source, utilize high-voltage pulse to trigger, utilize DC control realization A.C. contactor safety and stability under the influence that not fluctuateed by ac grid voltage to work reliably thereby reach to guarantee that A.C. contactor armature can reliable adhesive when the maximum air gap and keep stablize adhesive when under low pressure making armature in minimal air gap.
The utility model compared with the prior art, its advantage is:
1. the utility model triggers with high pressure and low pressure keeps making A.C. contactor not to be subjected to the influence that ac grid voltage fluctuates and safety and stability is worked reliably;
2. the utility model low pressure keeps reducing energy consumption;
3. the utility model can reduce the noise of A.C. contactor;
4. the utility model can be connected use with various A.C. contactor.
Description of drawings:
Fig. 1 is an electric theory diagram of the present utility model
Fig. 2 is another electric theory diagram of the utility model
Fig. 3 is the lower pressure rectifier of the utility model embodiment, the electrical schematic diagram of filtering
Fig. 4 is the K switch of the utility model embodiment 1, K 2Electrical schematic diagram
Fig. 5 is an outline drawing of the present utility model
Accompanying drawing is described in conjunction with the embodiments:
Fig. 1 is an electrical schematic diagram of the present utility model, and Fig. 5 is an outline drawing of the present utility model.The utility model is characterized in that being made up of controller housing 5, transformer 1 and wiring board 6, and transformer 1 and wiring board 6 are installed in the controller housing 1, and input U is arranged on the controller housing 5 InWith output U Out, K switch 3And K 4With exchange indicator light LP 1And operating on low voltage indicator light LP 2There are rectifier 2, filter 3 and high-low pressure direct current to trigger operating circuit 4 on the wiring board 6, transformer 1 is elementary to be connected to single-phase or three-phase alternating current electrical network and be connected to indicator light 8, the input of rectifier 2 on the secondary link plate 6 of transformer 1, the output of rectifier 2 is connected to the input that the high-low pressure direct current triggers operating circuit 4, the high-low pressure direct current trigger operating circuit by high voltage direct current circuits for triggering 41 and low-voltage direct operating circuit 42 and be connected to the common output end 7 of this controller ', common output end 7 ' be connected on the actuating coil 5 of A.C. contactor.In order to improve the work quality that the high-low pressure direct current triggers operating circuit 4, the direct current that rectifier 2 and 4 of operating circuits of high-low pressure direct current triggering also can be serially connected with after 3 pairs of rectifications of filter carries out filtering.
Transformer 1 secondary has a high-voltage output end 11 and a low-voltage output 12, and the high-voltage rectifier 21 of rectifier 2 is connected to the high-voltage output end 11 of transformer 1, and low-voltage rectifier 22 is connected to the low-voltage output 12 of transformer 1.The high-low pressure filter 31 of filter 3 and 32 input respectively are connected to the output of high-voltage rectifier 21 and low-voltage rectifier 22.The output of hv filtering device 31 is connected to an end of high voltage direct current circuits for triggering 41, and the output of low-voltage filter device 32 is connected to an end of low-voltage direct operating circuit 42.High voltage direct current circuits for triggering 41 in the high-low pressure direct current triggering operating circuit 4 are by K switch 1With diode D 1Be composed in series; Low-voltage direct operating circuit 42 is by K switch 2With diode D 2Be composed in series.By transformer 1, rectifier 2, filter 3 alternating current is converted to high pressure and low-voltage DC respectively, pass through K switch 1Or K 2With diode D 1Or D 2High voltage direct current circuits for triggering of forming 41 and operating on low voltage circuit 42 deactivations or maintenance A.C. contactor 5.During startup, the K switch in the closed low operating circuit 42 at first 2, the work energy in the time of can only providing the adhesive of A.C. contactor safety and stability owing to low-voltage direct operating circuit 42 can not provide the electric energy that triggers A.C. contactor adhesive action, and this moment, A.C. contactor did not have adhesive, the K switch in the closed low dc working circuit 2After, press the normally opened contact K in the high-voltage dc pulse circuits for triggering 1, offering the required high voltage direct current electric energy of A.C. contactor adhesive action by the high-voltage dc pulse circuits for triggering, A.C. contactor triggers adhesive.As long as this moment is the normally opened contact K in the relieving high-voltage dc pulse circuits for triggering 1, utilizing low-voltage direct operating circuit 42 to offer the low-voltage DC of A.C. contactor, but make A.C. contactor keep the adhesive operating state reliably with regard to safety and stability, its voltage is less than 100V, and preferable voltage range is 2V～15V.When the needs A.C. contactor quits work, as long as the K switch in the disconnection low-voltage direct operating circuit 2, remove be added on the A.C. contactor in order to keep the low-voltage DC of A.C. contactor adhesive operating state, will stop the adhesive work of A.C. contactor effectively.Utilize the A.C. contactor of above-mentioned DC control can realize that fully A.C. contactor safety and stability under the influence that is not subjected to the ac grid voltage fluctuation works reliably.
Simultaneously, the utility model low pressure keeps reducing the noise of energy consumption and minimizing A.C. contactor.
Fig. 2 is another electric theory diagram of the utility model, by transformer 1, rectifier 2, filter 3, the high-low pressure direct current triggers operating circuit 4 and voltage divider 6 is formed, transformer 1 is elementary to be connected to single-phase or the three-phase alternating current electrical network, the secondary input that connects rectifier 2 of transformer 1, the input of the output termination filter 3 of rectifier 2, the output of filter 3 is connected to voltage divider 6, high-end and the low side of voltage divider 6 is connected to an end of high voltage direct current circuits for triggering 41 and an end of low-voltage direct operating circuit 42 respectively, the high-low pressure direct current triggers operating circuit 41 and 42 and connects on the actuating coil 5 of A.C. contactor the other end of the actuating coil 5 of another termination A.C. contactor of voltage divider 6 jointly.Only increased a voltage divider 6 this moment, but can save a cover low-voltage rectifier 22 and a low-voltage filter device 32.
Fig. 3 is the low-voltage rectifier 22 of embodiment in the theory diagram of Fig. 1 and the electrical schematic diagram of filter 32, is connected to bridge rectifier D by the low-pressure end 12 of transformer 1 4Carry out rectification, capacitor C 1And C 2Be connected in parallel on rectifier D 4Output carry out filtering, voltage-stabiliser tube D 5Parallel connection is simultaneously done to be connected to integrated package of pressure-stabilizing U again after the preliminary voltage stabilizing 1Voltage stabilizing is to 5V, again through the C of parallel connection 3, C 4With the L that is connected on two outputs 1And L 2Further be filtered into a stable 5V voltage source and keep the low-voltage DC of adhesive so that A.C. contactor actuating coil 5 to be provided.
Fig. 4 is the K switch in the theory diagram of Fig. 1 1And K 2Embodiment, K wherein 1By button switch K 3, with triode Q 1Be main switching circuit, photoisolator U 2Form K switch with controllable silicon GT 3And resistance R 1Be serially connected in 5V power supply and triode Q 1Base stage between with to triode Q 1Provide base voltage, triode Q 1Grounded emitter, collector electrode is through R 2With photoisolator U 2Photoelectric tube connect the 5V power supply.From 11 ends of electrical network or transformer 1 through diode D 6Rectification (can be by diode D 6Halfwave rectifier or bridge rectifier) after direct voltage be connected on the anode of controllable silicon GT, the negative electrode of controllable silicon GT is through diode D 1Be connected to the actuating coil 5 of A.C. contactor, the anode of controllable silicon GT is by photoisolator U 2Be connected to the control utmost point of controllable silicon GT.R among the figure 6, R 7As the current-limiting resistance of photoisolator, while and C 5, C 6Establish for keeping controllable silicon GT to work more reliably.When pressing K switch 3, triode Q 1Saturation conduction, photoisolator U 2Conducting, the control of controllable silicon GT is high potential very, makes controllable silicon GT conducting, and high-tension electricity is passed through D 1Output to the actuating coil 5 of A.C. contactor and make it to trigger adhesive.K wherein 2By K switch 4With with triode Q 2Be that main switching circuit is formed K switch 4With triode Q 2Bias resistance R 3And R 4Be connected between the 5V power supply resistance R 3And R 4Tie point meet triode Q 2Base stage, triode Q 2Emitter connect the 5V power supply, its collector electrode passes through R 5With D 2Export jointly with high-tension electricity the series connection back, is connected to the actuating coil 5 of A.C. contactor.Resistance R 5With triode Q 2Between be serially connected with resistance R 9With direct current indicator light LP 2Whether in running order with the indication A.C. contactor.Above-mentioned transformer 1 and photoisolator U 2Can effectively AC network and low-voltage circuit be isolated, guarantee the safety of low-voltage circuit.D 3Be connected in parallel on 5 one-tenth one loops of actuating coil of output and A.C. contactor.When disconnecting the actuating coil 5 of A.C. contactor as the usefulness of releasing reverse current path.Present embodiment can provide the high low-tension supply of a kind of stability and a kind of highly reliable and high voltage source to the actuating coil of various A.C. contactors, and no-spark when guaranteeing high pressure moment adhesive is not subjected to the influence of fluctuations of external power grid when low voltage sustain.

Claims (10)

1. the dc controller of an A.C. contactor is characterized in that being made up of controller housing (5), transformer (1) and wiring board (6), and transformer (1) and wiring board (6) are installed in the controller housing (1), and controller housing has input U on (5) InWith output U Out, K switch 3And K 4With exchange indicator light LP 1And operating on low voltage indicator light LP 2Have rectifier (2) and high-low pressure direct current to trigger operating circuit (4) on the wiring board (6), transformer (1) is elementary to be connected to single-phase or three-phase alternating current electrical network and be connected to indicator light LP 1The secondary link plate (6) of transformer (1) is gone up the input of rectifier (2), the output of rectifier (2) is connected to the input that the high-low pressure direct current triggers operating circuit (4), and the high-low pressure direct current triggers operating circuit (4) by high voltage direct current circuits for triggering (41) and low-voltage direct operating circuit (42) and be connected to the common output end U of this controller Out, common output end U OutBe connected on the actuating coil (5) of A.C. contactor.
2. dc controling ac contactor according to claim 1, what it is characterized in that transformer (1) secondaryly has a high-voltage output end (11) and a low-voltage output (12), the high-voltage rectifier (21) of rectifier (2) is connected to the high-voltage output end (11) of transformer (1), and low-voltage rectifier (22) is connected to the low-voltage output (12) of transformer (1).
3. dc controling ac contactor according to claim 1, it is characterized in that being serially connected with filter (3) between rectifier (2) and the high-low pressure direct current triggering operating circuit (4), the input of the high pressure of filter (3) and low-voltage filter device (31 and 32) respectively is connected to the output of high-voltage rectifier (21) and low-voltage rectifier (22).
4. according to claim 1 or 3 described dc controling ac contactors, it is characterized in that the output of hv filtering device (31) is connected to an end of high voltage direct current circuits for triggering (41), the output of low-voltage filter device (32) is connected to an end of low-voltage direct operating circuit (42).
5. according to claim 1 or 3 described dc controling ac contactors, it is characterized in that the output of filter (3) and high-low pressure direct current trigger between the input of operating circuit (4) also is serially connected with a voltage divider (6), the high-pressure side of voltage divider (6) is connected to high voltage direct current circuits for triggering (41), and the low-pressure end of voltage divider (6) is connected to low-voltage direct operating circuit (42).
6. dc controling ac contactor according to claim 1 is characterized in that the high-low pressure direct current triggers high voltage direct current circuits for triggering (41) in the operating circuit (4) by K switch 1With diode D 1Be composed in series, low-voltage direct operating circuit (42) is by K switch 2With diode D 2Be composed in series.
7. dc controling ac contactor according to claim 1, the High Level DC Voltage that it is characterized in that low-voltage direct operating circuit (42) is less than 100V.
8. dc controling ac contactor according to claim 1, the voltage range that it is characterized in that low-voltage direct operating circuit (42) is 2V～15V.
9. dc controling ac contactor according to claim 6 is characterized in that K switch 1By button switch K 3, with triode Q 1Be main switching circuit, photoisolator U 2Form K switch with controllable silicon GT 3And resistance R 1Be serially connected in 5V power supply and triode Q 1Base stage between, triode Q 1Grounded emitter, collector electrode is through R 2With photoisolator U 2Photoelectric tube connect the 5V power supply, from 11 ends of electrical network or transformer 1 through diode D 6Direct current after the rectification is connected on the anode of controllable silicon GT, and the negative electrode of controllable silicon GT is through diode D 1Be connected to the actuating coil 5 of A.C. contactor, the anode of controllable silicon GT is connected to the control utmost point of controllable silicon GT by photoisolator.
10. dc controling ac contactor according to claim 6 is characterized in that K switch 2By K switch 4With with triode Q 2Be that main switching circuit is formed K switch 4With triode Q 2Bias resistance R 3And R 4Be connected between the 5V power supply resistance R 3And R 4Tie point meet triode Q 2Base stage, triode Q 2Emitter connect the 5V power supply, its collector electrode passes through R 5With D 2Series connection back and high-tension electricity are connected to the actuating coil 5 of A.C. contactor, resistance R jointly 5With triode Q 2Between be serially connected with resistance R 9With direct current indicator light LP 2, D 3Be connected in parallel on 5 one-tenth one loops of actuating coil of output and A.C. contactor.
CN 98201012 1998-01-24 1998-01-24 DC controller for AC contactor Expired - Fee Related CN2378824Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 98201012 CN2378824Y (en) 1998-01-24 1998-01-24 DC controller for AC contactor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 98201012 CN2378824Y (en) 1998-01-24 1998-01-24 DC controller for AC contactor

Publications (1)

Publication Number Publication Date
CN2378824Y true CN2378824Y (en) 2000-05-17

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Application Number Title Priority Date Filing Date
CN 98201012 Expired - Fee Related CN2378824Y (en) 1998-01-24 1998-01-24 DC controller for AC contactor

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CN (1) CN2378824Y (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101867303A (en) * 2010-05-24 2010-10-20 江阴市星火电子科技有限公司 Intelligent electricity-saving device of AC/DC contactor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101867303A (en) * 2010-05-24 2010-10-20 江阴市星火电子科技有限公司 Intelligent electricity-saving device of AC/DC contactor
CN101867303B (en) * 2010-05-24 2012-11-14 江阴市星火电子科技有限公司 Intelligent electricity-saving device of AC/DC contactor

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GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
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