CN101441956A - Control circuit for electromagnet of low-tension switch electric appliance - Google Patents
Control circuit for electromagnet of low-tension switch electric appliance Download PDFInfo
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- CN101441956A CN101441956A CNA2008102020447A CN200810202044A CN101441956A CN 101441956 A CN101441956 A CN 101441956A CN A2008102020447 A CNA2008102020447 A CN A2008102020447A CN 200810202044 A CN200810202044 A CN 200810202044A CN 101441956 A CN101441956 A CN 101441956A
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Abstract
The invention relates to an electromagnet control circuit for low voltage switch electric appliances, which comprises an electromagnet, an external AC power input circuit, a rectifier and filtering circuit, a self-feedback pulse-width modulation and IGBT drive circuit, a starting delay circuit, an input voltage sampling circuit, and a control chip MCU circuit. The signal transmission of the circuits is: the self-feedback pulse-width modulation and IGBT drive circuit modulates and outputs pulse width according to load of the electromagnet, so as to control attraction and release of the electromagnet; the starting delay circuit adjusts feedback resistance value at the attraction moment aiming at the condition that the electromagnet needs heavy current at the attraction moment and keeps low current after the attraction, so as to adjust pulse width of output voltage to provide starting heavy current for the electromagnet; when the starting time is up, the starting delay circuit adjusts the feedback resistance value to adjust the pulse width of the output voltage, so as to provide maintaining low current for the electromagnet; and the input voltage sampling circuit detects external AC power input, transforms a voltage signal into a frequency signal through a V/f converting agent, and transmits the signal to the control chip MCU.
Description
Technical field
The present invention relates to a kind of control circuit for electromagnet of low-tension switch electric appliance, the use that matches with corresponding device for switching belongs to the low voltage electrical apparatus technology field.
Background technology
Control circuit for electromagnet is an important circuit of low-voltage electrical apparatus field contactor product class, and this circuit is controlled its adhesive or release by the control current of electromagnet, thereby makes the dynamic and static contact of contactor series products produce corresponding break-make motion.
At present, domestic most of device for switching control circuit for electromagnet adopts the simple break-make control of full voltage, and control is simple, and cost is low, but the electromagnet motoricity is big, causes that easily contact bounce causes contact to burn; The simple break-make of full voltage is controlled electromagnet energy consumption height in addition, and long-term heating power is serious.
China domestic a part of device for switching manufacturer, device for switching business men product control circuit for electromagnet employing electromagnet two-supply circuit altogether.Two-supply circuit refers to that electromagnet is divided into the adhesive power supply, keeps power supply two parts.Adopt big electric current power supply during startup, normally high pressure or full voltage power supply; Adopt little current DC power supply to keep enough holding forces during maintenance.Though this circuit has been distinguished startup and holding current, holding current is not sampled, to not numerical value sampling of input voltage, so electromagnet current can not change with the external voltage input.
External a part of device for switching manufacturer, control circuit for electromagnet adopts the electromagnet two-supply circuit.Be divided into the adhesive power supply, keep power supply two parts, adopted current feedback, electromagnet current can change with extraneous input voltage, but input voltage is not had the numerical value sampling, can't accurately control electromagnet current.
Chinese invention patent CN99122868 has the schematic diagram (as Fig. 1) by the magnet control equipment of the power circuit of electromagnet holding current power supply.Wherein (1) is electromagnet coil, and Va is added in (1) and goes up by T4 Control current size, and the electric current of T5 control R4 cut-offs, and R4 is a feedback resistance, and feedback signal passes to E2, and control chip (9) is exported adjusting according to feedback.This circuit has current feedback, does not have Va voltage detecting feedback.
Summary of the invention
The object of the present invention is to provide a kind of control circuit for electromagnet of low-tension switch electric appliance, this is the circuit that is used for electromagnet of low-tension switch electric appliance control, realizing startup, the retentive control of electromagnet, and can change the circuit of regulating magnet electric current magnet control with external voltage.
In order to achieve the above object, technical scheme of the present invention is: this control circuit for electromagnet comprises that self feed back pulse-width modulation and IGBT drive circuit, electromagnet start delay circuit, input voltage sample circuit, external ac power source input, rectification and filter circuit, control chip MCU, electromagnet.Through the power supply of external ac power source input, rectification and filter circuit supply with self feed back pulse-width modulation and IGBT drive circuit, electromagnet starts delay circuit, input voltage sample circuit, control chip MCU, electromagnet, the signal of input voltage sample circuit sampling is after control chip MCU handles, send self feed back pulse-width modulation and IGBT drive circuit drive magnet again, need the delayed startup delay circuit, by self feed back pulse-width modulation and IGBT drive circuit drive magnet again.
Beneficial effect of the present invention: this is a kind of circuit that is applicable to that electromagnet of low-tension switch electric appliance is controlled, and its current collection magnet constant current control, the electromagnet maintenance of startup time-delay back, input voltage sampling, the wide voltage power supply self-regulating function of electromagnet are in one.Use has a volume in low-tension switch electric appliance little, function is strong, high reliability features, make controlled electromagnet have good startup, retention performance, reduce the electromagnet energy consumption, reduce the electromagnet volume, enlarge work of electromagnet voltage, prolonging the work of electromagnet life-span, and make work of electromagnet more steady, is a kind of electronic circuit that promotional value and practical value are arranged.
Description of drawings
Fig. 1 is the schematic diagram of the magnet control equipment of prior art;
Fig. 2 is a control circuit for electromagnet of low-tension switch electric appliance hardware principle block diagram of the present invention;
Fig. 3 is control circuit for electromagnet of low-tension switch electric appliance self feed back pulse-width modulation of the present invention and IGBT drive circuit and starts the delay circuit schematic diagram;
Fig. 4 is a control circuit for electromagnet of low-tension switch electric appliance input voltage sample circuit schematic diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples the present invention is elaborated.
Fig. 1 is a patent of invention CN99122868 control circuit for electromagnet of low-tension switch electric appliance schematic diagram.Existing explanation no longer repeats in background technology.
With reference to Fig. 2, this is a control circuit for electromagnet of low-tension switch electric appliance hardware principle block diagram of the present invention.
Described control circuit for electromagnet comprises external ac power source input 1, current rectifying and wave filtering circuit 2, self feed back pulse-width modulation and IGBT drive circuit 3, starts delay circuit 4, input voltage sample circuit 5, control chip circuit 6, electromagnet 7.
Signal transmission between the foregoing circuit: external ac power source input 1, after carrying out rectification and Filtering Processing, rectification and filter circuit 2 be delivered to self feed back pulse-width modulation and IGBT drive circuit 3, this circuit is according to electromagnet 7 loading conditions, automatically regulate output pulse width, to reconcile the copped wave width of IGBT, thereby control is input to the current energy of electromagnet 7, controls adhesive, the release of electromagnet effectively.Start delay circuit 4 and be primarily aimed at the big electric current of electromagnet 7 adhesive moment needs, and keep the little situation of electric current after the adhesive, for distinguishing attract current and keep electric current, thereby adjust the output voltage pulsewidth by adjusting the feedback resistance resistance, start big electric current for electromagnet 7 provides in adhesive moment.Arrive when start-up time, adjust the output voltage pulsewidth, keep little electric current for electromagnet 7 provides thereby adjust the feedback resistance resistance.Input voltage sample circuit 5 detects external ac power source input 1, converts voltage signal to the frequency model by the V/f change-over circuit, is delivered to control chip MCU6.Whether control chip MCU6 is too high or too low according to the size decision voltage of input voltage, judges whether stop electromagnet 7 work.Thereby control chip MCU6 is by the adhesive or the disjunction of the working power control electromagnet 7 of conducting or shutoff self feed back pulse-width modulation and IGBT drive circuit 3.
With reference to Fig. 3, this is self feed back pulse-width modulation of the present invention and IGBT drive circuit and starts the delay circuit schematic diagram.
Described self feed back pulse-width modulation and IGBT drive circuit 3 exchange input AC1, AC2 and carry out rectification by D1.T1 carries out turn-on and turn-off to circuit.U1 with the control of voltage driving mode realization to T1, makes its conducting or shutoff by feedback signal.R04, R05 are feedback resistance, by the electric current variation generation voltage signal variation of R04, R05, export thereby this voltage signal variation feeds back to U1 voltage adjustment pulsewidth.Described startup delay circuit, during startup, powered on moment C03 voltage is lower than R08 voltage, and the U2 voltage ratio is back output high level, the Q1 conducting, R05 and R04 resistance in parallel diminishes, and becomes the startup feedback resistance.Arrive when starting delay time, C03 charging back voltage is higher than R08 voltage, and the U2 voltage ratio is the back output low level, and Q1 is by turn-offing, and R04 becomes feedback resistance separately, and it is big that the feedback resistance resistance becomes, feedback resistance when forming electromagnet and keeping.
With reference to Fig. 4, this is a control circuit for electromagnet of low-tension switch electric appliance input voltage sample circuit schematic diagram of the present invention.
Described input voltage sample circuit 5, supply voltage input signal (supply voltage input signal+,- draw 2,4 pin from Fig. 2 rectifier D1 respectively) is decayed into small-signal after by R09, R10, R11 step-down, R12 is a sampling resistor, and C04 is that the AC signal of filter capacitor after with rectification filtered into direct current signal.U3 samples and is converted into frequency signal the C04 voltage signal and outputs to control chip.
Though the present invention describes with reference to the above embodiments; but those of ordinary skill in the art; will be appreciated that above embodiment is used for illustrating the present invention; should understand and wherein can make variations and modifications and do not break away from the present invention in a broad sense; so be not as limitation of the invention; as long as in connotation scope of the present invention, to the variation of above-described embodiment, the protection range that distortion all will fall into claim of the present invention.
Claims (7)
1, a kind of control circuit for electromagnet of low-tension switch electric appliance, comprise an electromagnet (7), external ac power source input circuit (1), rectification and filter circuit (2), it is characterized in that: also comprise self feed back pulse-width modulation and IGBT drive circuit (3), start delay circuit (4), input voltage sample circuit (5), control chip MCU circuit (6);
Signal transmission between the foregoing circuit: external ac power source input circuit (1), after rectification and filter circuit (2) carry out rectification and Filtering Processing, be delivered to self feed back pulse-width modulation and IGBT drive circuit (3), this circuit is according to electromagnet (7) loading condition, automatically regulate output pulse width, to reconcile the copped wave width of IGBT, thereby control is input to the current energy of electromagnet (7), control the adhesive of electromagnet effectively, discharge, start delay circuit (5) and be primarily aimed at the big electric current of electromagnet (7) adhesive moment needs, and keep the little situation of electric current after the adhesive, for distinguishing attract current and keeping electric current, thereby adjust the output voltage pulsewidth by adjusting the feedback resistance resistance in adhesive moment, for providing, electromagnet (7) starts big electric current, arrive when start-up time, thereby adjust the feedback resistance resistance and adjust the output voltage pulsewidth, for providing, electromagnet (7) keeps little electric current, input voltage sample circuit (5) detects external ac power source input (1), convert voltage signal to the frequency model by the V/f change-over circuit, be delivered to control chip MCU (6); Whether control chip MCU (6) is too high or too low according to the size decision voltage of input voltage, judges whether stop electromagnet (7) work; Control chip MCU (6) by conducting or turn-off the self feed back pulse-width modulation and IGBT drive circuit (3) thus the adhesive or the disjunction of working power control electromagnet (7).
2, control circuit for electromagnet of low-tension switch electric appliance as claimed in claim 1, it is characterized in that: described self feed back pulse-width modulation and IGBT drive circuit (3), carry out the voltage pulse-width modulation according to feedback signal, control IGBT conducting or end, thereby control flows is crossed current of electromagnet, makes electromagnetic actuation or disconnection.
3, control circuit for electromagnet of low-tension switch electric appliance as claimed in claim 1 is characterized in that: described startup delay circuit (4), and can in start-up course, distinguish starting current and keep electric current.
4, control circuit for electromagnet of low-tension switch electric appliance as claimed in claim 1 is characterized in that: described input voltage sample circuit (5), the input voltage and signal is passed to control chip MCU handle of will sampling.
5, control circuit for electromagnet of low-tension switch electric appliance as claimed in claim 1 or 2, it is characterized in that: described self feed back pulse-width modulation and IGBT drive circuit (3), exchange input AC1, AC2 and carry out rectification by D1, T1 carries out turn-on and turn-off to circuit, U1 realizes control to T1 by feedback signal with voltage driving mode, make its conducting or shutoff, R04, R05 are feedback resistance, electric current by R04, R05 changes the variation of generation voltage signal, adjusts pulsewidth output thereby this voltage signal variation feeds back to U1 voltage.
6, control circuit for electromagnet of low-tension switch electric appliance as claimed in claim 1, it is characterized in that: described startup delay circuit (4), during startup, powered on moment C03 voltage is lower than R08 voltage, the U2 voltage ratio is back output high level, the Q1 conducting, R05 and R04 resistance in parallel diminishes, and becomes the startup feedback resistance, arrives when starting delay time, C03 charging back voltage is higher than R08 voltage, the U2 voltage ratio is the back output low level, and Q1 is by turn-offing, and R04 becomes feedback resistance separately, it is big that the feedback resistance resistance becomes, feedback resistance when the formation electromagnet is kept.
7, control circuit for electromagnet of low-tension switch electric appliance as claimed in claim 1, it is characterized in that: described input voltage sample circuit (5), the supply voltage input signal is decayed into small-signal after by R09, R10, R11 step-down, R12 is a sampling resistor, C04 is that the AC signal of filter capacitor after with rectification filtered into direct current signal, and U3 samples to the C04 voltage signal and is converted into frequency signal and outputs to control chip MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102020447A CN101441956B (en) | 2008-10-31 | 2008-10-31 | Control circuit for electromagnet of low-tension switch electric appliance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008102020447A CN101441956B (en) | 2008-10-31 | 2008-10-31 | Control circuit for electromagnet of low-tension switch electric appliance |
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| CN101441956A true CN101441956A (en) | 2009-05-27 |
| CN101441956B CN101441956B (en) | 2011-03-23 |
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| CN2008102020447A Active CN101441956B (en) | 2008-10-31 | 2008-10-31 | Control circuit for electromagnet of low-tension switch electric appliance |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800113A (en) * | 2010-04-02 | 2010-08-11 | 石家庄五龙制动器有限公司 | Magnetic brake controller |
| CN102184807A (en) * | 2011-04-11 | 2011-09-14 | 李锦恭 | Ultralow-power-consumption and high-efficiency electromagnet control circuit |
| CN102709021A (en) * | 2012-06-18 | 2012-10-03 | 广东宝莱特医用科技股份有限公司 | Control circuit for electromagnet and electromagnetic valve |
| CN103456565A (en) * | 2013-09-12 | 2013-12-18 | 福州大学 | Intelligent control device of small-capacity electromagnetic appliance |
| CN104922803A (en) * | 2014-03-20 | 2015-09-23 | 住友重机械工业株式会社 | Charged particle beam treatment apparatus and method of adjusting path length of charged particle beam |
| CN106329466A (en) * | 2016-11-14 | 2017-01-11 | 国网浙江慈溪市供电公司 | Low-voltage switch control device |
| CN107608416A (en) * | 2017-09-11 | 2018-01-19 | 中国航空工业集团公司西安飞机设计研究所 | A kind of electromagnetic lock temprature control method |
| CN108982044A (en) * | 2018-06-12 | 2018-12-11 | 西安工程大学 | A kind of exciting bank for electric power pylon modal idenlification |
| CN112399651A (en) * | 2020-10-30 | 2021-02-23 | 广东格兰仕集团有限公司 | Electromagnet drive control circuit of heating electric appliance and heating electric appliance |
| CN113611572A (en) * | 2021-10-08 | 2021-11-05 | 南京全宁电器有限公司 | Energy-saving control method of contactor |
| CN114582585A (en) * | 2022-03-09 | 2022-06-03 | 青岛迈金智能科技股份有限公司 | Hybrid modulation driving system and method of electromagnet |
| CN117080018A (en) * | 2023-09-27 | 2023-11-17 | 德力西电气有限公司 | Contactor coil control system |
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| US5347419A (en) * | 1992-12-22 | 1994-09-13 | Eaton Corporation | Current limiting solenoid driver |
| JP3085132B2 (en) * | 1995-03-02 | 2000-09-04 | 本田技研工業株式会社 | Control device for pulse width modulation solenoid |
| FR2786919B1 (en) * | 1998-12-07 | 2001-01-12 | Schneider Electric Ind Sa | CONTROL DEVICE FOR AN ELECTRO-MAGNET FOR OPENING OR CLOSING A CIRCUIT BREAKER, WITH LOCAL CONTROL AND REMOTE CONTROL |
| CN1086052C (en) * | 1998-12-25 | 2002-06-05 | 永济电机厂 | DC contactor |
| CN100351971C (en) * | 2005-09-22 | 2007-11-28 | 西安交通大学 | Intelligently controlled AC contact with voltage feedback |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800113A (en) * | 2010-04-02 | 2010-08-11 | 石家庄五龙制动器有限公司 | Magnetic brake controller |
| CN102184807A (en) * | 2011-04-11 | 2011-09-14 | 李锦恭 | Ultralow-power-consumption and high-efficiency electromagnet control circuit |
| CN102184807B (en) * | 2011-04-11 | 2013-07-17 | 广州国保科技有限公司 | Ultralow-power-consumption and high-efficiency electromagnet control circuit |
| CN102709021A (en) * | 2012-06-18 | 2012-10-03 | 广东宝莱特医用科技股份有限公司 | Control circuit for electromagnet and electromagnetic valve |
| CN102709021B (en) * | 2012-06-18 | 2014-02-26 | 广东宝莱特医用科技股份有限公司 | Control circuit for electromagnet and electromagnetic valve |
| CN103456565A (en) * | 2013-09-12 | 2013-12-18 | 福州大学 | Intelligent control device of small-capacity electromagnetic appliance |
| CN103456565B (en) * | 2013-09-12 | 2015-06-03 | 福州大学 | Intelligent control device of small-capacity electromagnetic appliance |
| CN104922803B (en) * | 2014-03-20 | 2018-02-09 | 住友重机械工业株式会社 | The range method of adjustment of charged particle beam therapeutic apparatus and charged particle line |
| CN104922803A (en) * | 2014-03-20 | 2015-09-23 | 住友重机械工业株式会社 | Charged particle beam treatment apparatus and method of adjusting path length of charged particle beam |
| CN106329466A (en) * | 2016-11-14 | 2017-01-11 | 国网浙江慈溪市供电公司 | Low-voltage switch control device |
| CN107608416A (en) * | 2017-09-11 | 2018-01-19 | 中国航空工业集团公司西安飞机设计研究所 | A kind of electromagnetic lock temprature control method |
| CN108982044A (en) * | 2018-06-12 | 2018-12-11 | 西安工程大学 | A kind of exciting bank for electric power pylon modal idenlification |
| CN112399651A (en) * | 2020-10-30 | 2021-02-23 | 广东格兰仕集团有限公司 | Electromagnet drive control circuit of heating electric appliance and heating electric appliance |
| CN113611572A (en) * | 2021-10-08 | 2021-11-05 | 南京全宁电器有限公司 | Energy-saving control method of contactor |
| CN113611572B (en) * | 2021-10-08 | 2022-02-01 | 南京全宁电器有限公司 | Energy-saving control method of contactor |
| CN114582585A (en) * | 2022-03-09 | 2022-06-03 | 青岛迈金智能科技股份有限公司 | Hybrid modulation driving system and method of electromagnet |
| CN117080018A (en) * | 2023-09-27 | 2023-11-17 | 德力西电气有限公司 | Contactor coil control system |
| CN117080018B (en) * | 2023-09-27 | 2024-01-19 | 德力西电气有限公司 | Contactor coil control system |
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| CN101441956B (en) | 2011-03-23 |
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Owner name: SHANGHAI DIANKE ELECTRICAL APPARATUS SCIENCE AND T Free format text: FORMER OWNER: SHANGHAI ELECTRICAL APPLIANCES SCIENCE AND TECHNOLOGY INSTITUTE(GROUP) CO., LTD. Effective date: 20100108 |
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Effective date of registration: 20100108 Address after: Number 505, Wuning Road, Shanghai, 200063 Applicant after: Shanghai Electrical Apparatus Research Institute Co., Ltd. Address before: Number 505, Wuning Road, Shanghai, 200063 Applicant before: Shanghai Electrical Apparatus Research Institute (Group) Co., Ltd. |
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