CN1707718A - Integral digital control contactor - Google Patents
Integral digital control contactor Download PDFInfo
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- CN1707718A CN1707718A CN 200510020916 CN200510020916A CN1707718A CN 1707718 A CN1707718 A CN 1707718A CN 200510020916 CN200510020916 CN 200510020916 CN 200510020916 A CN200510020916 A CN 200510020916A CN 1707718 A CN1707718 A CN 1707718A
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- contactor
- digital control
- integral digital
- exciting coil
- permanent magnet
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Abstract
The present invention relates to contactor, especially its iron core and driving unit, and discloses one kind of integral numerically controlled contactor. Technologically, the integral numerically controlled contactor includes exciting coil and still iron core, and features the still iron core with embedded permanent magnet, and the driver to provide the exciting coil with driving current. The contactor of the present invention has the advantages of small size, small drive power, no need of maintaining current, low power consumption, simple drive circuit first, powerful control interface function, few heat generated in the exciting coil and low service life. The present invention is used mainly in industrial automatic control, intelligent low voltage power distribution and similar fields.
Description
Technical field
The present invention relates to contactor, particularly contactor iron core and contactor drive unit.
Background technology
The range of application of contactor is very extensive, and deep market value basis is arranged, and in unit control or the single occasion of control task, plays an important role.Based on the control system of contactor, have the advantages that control circuit is simple, actuating force is strong, with low cost.Contactor is generally by fixed core, and magnet exciting coil moves iron core, formations such as arc-extinguish chamber.The adhesive of contactor, maintenance, breaking course are very complex dynamic process of a Changing Pattern.The major defect of the contactor of prior art is, the contactor volume is big, and the driving power that needs is big, and faults such as coil scaling loss take place the energy consumption height easily, and useful life is short.External intelligent contactor, its drive unit are furnished with advanced electronic circuit, adopt transducer and control chip, and whole dynamic process is controlled in real time, adopt high-power FET to drive magnet exciting coil.Start owing to needing to switch, provide and keep electric current, suppress coil temperature rise etc., its drive circuit is very complicated, and exists starting power big equally, reaches problems such as coil heating.
Summary of the invention
Technical problem to be solved by this invention, it is little just to provide a kind of volume, and energy consumption is low, the built-in drive unit that the life-span is long and the integral digital control contactor of control interface.
The present invention solves its technical problem, and the technical scheme of employing is that integral digital control contactor comprises magnet exciting coil and fixed core, it is characterized in that: be inlaid with permanent magnet in the described fixed core;
Described fixed core is built up by silicon steel sheet;
Described permanent magnet is a Nd-Fe-B permanent magnet;
Described fixed core is an E core; Described permanent magnet is embedded in described fixed core bottom portion of groove;
Integral digital control contactor of the present invention also comprises drive unit; Described drive unit provides drive current for magnet exciting coil.
The invention has the beneficial effects as follows that the contactor volume is little, driving power is little, does not need to keep electric current, and energy consumption is low, and driving circuit structure is simple, and control interface is powerful, and magnet exciting coil generates heat hardly, long service life.
Description of drawings
Fig. 1 is the contactor construction schematic diagram of embodiment;
Fig. 2 is embodiment drive unit power principle figure;
Fig. 3 is embodiment driving device controls circuit theory diagrams;
Fig. 4 is an embodiment drive unit circuit diagram.
Embodiment
Below in conjunction with drawings and Examples, describe technical scheme of the present invention in detail.
Integral digital control contactor of the present invention embeds permanent magnet in the fixed core of common contactor, increased fixed core to moving the suction-combining force unshakable in one's determination, so just can reduce the core volume and the magnet exciting coil number of turn, thereby reduce the contactor volume.On the other hand,, reduced requirement, can reduce the magnet exciting coil drive current, reduced requirement, reduced the volume of power supply, made the integrated possibility that becomes of drive unit power supply capacity to magnet exciting coil magnetic force because the suction-combining force unshakable in one's determination increases.After the contactor adhesive, because the effect of magnetic field of permanent magnet does not need to keep electric current, contactor just can keep in touch state, has both simplified drive unit, has reduced energy consumption again.
The permanent magnet of inlaying in the fixed core of contactor is the core component of contactor electricity, magnetic mechanism, and permanent magnet is a magnetic source in magnetic circuit.Because during the contactor disjunction, need overcome the magnetic force of permanent magnet, the magnetic field that magnet exciting coil produces is opposite with the permanent magnet magnetic field direction, if the HCJ of permanent magnet is too low, just may be lost efficacy by demagnetization.The performance of permanent magnet also can be subjected to all multifactor influences such as environment, temperature, time.For guarantee permanent magnet mechanism can be for a long time, operation stably, the present invention has selected Nd-Fe-B permanent magnet for use, to guarantee its performance.On the other hand, the magnetic field intensity of permanent magnet also is an important parameter, magnetic force is too strong, is easy to generate misoperation, magnetic force too a little less than, can not keep the attracting state of contactor again reliably, the present invention has selected the embedded location of permanent magnet dexterously, has reduced the requirement to magnetic field of permanent magnet intensity parameters precision, even magnetic field intensity changes in a big way, also can meet the demands, this has crucial meaning to actual production.The present invention on the basis of fully exploring, formulated perfect manufacturing processing and assembly technology.
Integral digital control contactor of the present invention, its drive unit comprises power supply, change over switch JK1, change over switch JK2, control circuit and expansion interface all are installed in the contactor shell, integrate with contactor, form integrated contactor.The drive current of contactor magnet exciting coil adopts pulse current to drive pulse current duration≤50ms.
Embodiment
This routine integral digital control contactor, the E core that fixed core 2 adopts silicon steel sheet to build up, permanent magnet 1 is selected Nd-Fe-B permanent magnet for use, and permanent magnet 1 is embedded in E core 2 bottom portion of groove.This routine structure as shown in Figure 1.
Permanent magnet 1 is inlayed bottom portion of groove in the drawings, with moving 4 apart from each others unshakable in one's determination, can not produce misoperation, and when magnet exciting coil 3 energisings, after the contactor adhesive, permanent magnet 1 can keep in touch the attracting state of device again.Through test of many times, when the magnetic field intensity of permanent magnet 1 changes, still can satisfy above-mentioned requirements rightly in a big way.
Fig. 2 has provided this routine drive unit power circuit principle figure.
Power circuit is made of two relatively independent power branch, is undertaking respectively to control circuit and expansion interface power supply task.T1 is the miniature transformer of the two 9V (1.5VA) of output among the figure, and by the branch road that 3,5 outputs of transformer T1 constitute, through bridge heap D1 rectification, power supply VC1 and power supply VC2 are formed in capacitor C 3, capacitor C 4 filtering.Powered by VC2 during the contactor adhesive, at this moment capacitor C 3 is in parallel with capacitor C 4 through diode D6, and output institute energy requirement is powered by VC1 during the contactor disjunction, and institute's energy requirement is only provided by capacitor C 3.3,4,5 outputs of another route T1, through diode D2, diode D3 full-wave rectification, power supply VC3 is formed in capacitor C 1 filtering, and VC3 forms constant-current source circuit by pressurizer U1 and resistance R 4, provides constant-current supply to expansion interface, its output called after VC4.Because VC4 adopts the form power supply of constant-current source, even overload appears in the control system that expansion interface connects or short circuit can not make the damage power supply yet.
Fig. 3 is this routine control circuit schematic diagram.KM is the magnet exciting coil of contactor among the figure, switches the sense of current of the magnet exciting coil KM that flows through by diverter switch JK1, JK2, reaches the purpose of control contactor adhesive, maintenance, disjunction overall process.
The control circuit course of work is: after the energized, the two ends of magnet exciting coil KM are through normally closed the ground connection of diverter switch JK1, JK2, contactor is ready, when expansion interface control end UB-3 and UB-2 are respectively " 0 " and " 1 ", diac D5 conducting → relay J 3 adhesives → relay J 2 adhesives, magnet exciting coil KM is often made war electricly through diverter switch JK2, drives the contactor adhesive.By the lc circuit that capacitor C 6, relay J 2 are formed, relay J2 discharges after delaying time, magnet exciting coil KM outage, and contactor keeps attracting state by the magnetic force of permanent magnet, the closed-loop path discharge that while capacitor C 5 forms through resistance R 7, relay J 1.When UB-3 is that " 0 ", UB-2 are during for " 0 ", diac D5 ends → 1 adhesive of relay J 3 release → relay J, magnet exciting coil KM is often made war electricly through diverter switch JK1, contactor disjunction, the lc circuit that capacitor C 5, relay J 1 are formed, relay J1 discharges after delaying time, magnet exciting coil KM outage, the disjunction state keeps by back-moving spring, and capacitor C 6 is through the closed-loop path discharge of resistance R 7, relay J 2 formation simultaneously, when UB-3 was " 1 ", contactor returned armed state.The control port logical relation sees Table 1.
Table 1
| ??UB-2 | ??UB-3 | Output state |
| ??1 | ??0 | ??1 |
| ??0 | ??0 | ??0 |
| ??1 | ??1 | ??0 |
| ??0 | ??1 | ??0 |
Annotate: logical one 〉=4V DC, 1mA,
Logical zero≤3V DC, 0.5mA
Fig. 4 is the drive unit circuit diagram.More clearly express the annexation of expansion interface UB and control circuit among the figure.
Expansion interface UB adopts the USB interface form, comprise a DC5～12V, 10～20mA constant-current supply, two logic control ports, the function expansion platform that ground wire is formed, on this platform, can pass through operational amplifier or comparator (as MAX951), connect all kinds of integrated sensors, implement the control of analog quantity as: temperature, humidity, pressure, magnetic (Hall), photosensitive, air-sensitive etc., also can external grammed switch, digital circuit, carry out the position, in proper order, time control, or implement Long-distance Control by the corresponding interface.This expansion interface also can with single-chip microcomputer, the control level of PLC connects.
The integral digital control contactor of the present invention product that to be a kind of " forceful electric power " combine with digital circuit with " light current ", electromagnetism and permanent magnetism, mechanical structure, it has broken through the traditional design concept of integral digital control contactor, has expanded the space of the following survival and development of integral digital control contactor with the brand-new mode of thinking.Integral digital control contactor of the present invention comprises that the drive unit of DC-24V power supply, change over switch, control circuit and expansion interface is built-in.Handling safety, the function expansion is flexible, applied range, little, the simple installation of volume.Contactor with specification 100A is an example, its drive unit energy consumption≤3W, energy-saving effect is very remarkable, long service life (occupy international most advanced level greater than 1,000,000 times useful life), and technological transformation, the industrial process automation that can be applied independently in traditional industry controlled, intelligent low pressure terminal distribution.
Claims (10)
1. integral digital control contactor comprises magnet exciting coil and fixed core, it is characterized in that: be inlaid with permanent magnet in the described fixed core.
2. integral digital control contactor according to claim 1 is characterized in that: described fixed core is built up by silicon steel sheet.
3. integral digital control contactor according to claim 1 is characterized in that: described permanent magnet is a Nd-Fe-B permanent magnet.
4. according to claim 1,2 or 3 described integral digital control contactors, it is characterized in that: described fixed core is an E core, and described permanent magnet is embedded in described E core bottom portion of groove.
5. integral digital control contactor according to claim 1 is characterized in that: described contactor also comprises drive unit; Described drive unit provides drive current for magnet exciting coil.
6. integral digital control contactor according to claim 5 is characterized in that: described drive unit comprises power supply, change over switch (JK1), change over switch (JK2), control circuit and expansion interface; Described magnet exciting coil is connected with power supply with change over switch (JK2) by change over switch (JK1); Described change over switch (JK1) is connected with control circuit with diverter switch (JK1); Described control circuit is connected with control interface.
7. integral digital control contactor according to claim 6 is characterized in that: described control circuit is with pulse mode control transformation switch.
8. integral digital control contactor according to claim 7 is characterized in that: described control circuit comprises the relay (J1) of connecting with electric capacity (C5), the relay (J2) of connecting with electric capacity (C6); Described relay (J1) is connected with power supply by switch (JK3-1); Described relay (J2) is connected with power supply by switch (JK3-2); Described switch (JK3-1), (JK3-2) are controlled by relay (J3); The controlled interface of described relay (J3) drives.
9. according to claim 6,7 or 8 described integral digital control contactors, it is characterized in that: described expansion interface adopts the standard USB interface form.
10. integral digital control contactor according to claim 6 is characterized in that: described expansion interface compatible with digital circuit, single-chip microcomputer, PLC control level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510020916 CN1270339C (en) | 2005-05-20 | 2005-05-20 | Integral digital control contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510020916 CN1270339C (en) | 2005-05-20 | 2005-05-20 | Integral digital control contactor |
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| Publication Number | Publication Date |
|---|---|
| CN1707718A true CN1707718A (en) | 2005-12-14 |
| CN1270339C CN1270339C (en) | 2006-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510020916 Expired - Fee Related CN1270339C (en) | 2005-05-20 | 2005-05-20 | Integral digital control contactor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007028321A1 (en) * | 2005-09-09 | 2007-03-15 | Jinping Liu | Low-power numerically controlled contactor and control system made of the contactors |
| CN101202181B (en) * | 2007-10-30 | 2010-08-11 | 东南大学 | Permanent magnetism contactor operation mechanism |
| CN102820171A (en) * | 2012-08-14 | 2012-12-12 | 刘衍春 | Control circuit of energy-saving permanent magnet maintaining alternating current contactor |
| CN114351613A (en) * | 2022-01-07 | 2022-04-15 | 北京工业大学 | Intelligent road traffic linear induction device |
-
2005
- 2005-05-20 CN CN 200510020916 patent/CN1270339C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007028321A1 (en) * | 2005-09-09 | 2007-03-15 | Jinping Liu | Low-power numerically controlled contactor and control system made of the contactors |
| US8093969B2 (en) | 2005-09-09 | 2012-01-10 | Jinping Liu | Low-power numerically controlled contactor and control system made of the contactors |
| CN101202181B (en) * | 2007-10-30 | 2010-08-11 | 东南大学 | Permanent magnetism contactor operation mechanism |
| CN102820171A (en) * | 2012-08-14 | 2012-12-12 | 刘衍春 | Control circuit of energy-saving permanent magnet maintaining alternating current contactor |
| CN114351613A (en) * | 2022-01-07 | 2022-04-15 | 北京工业大学 | Intelligent road traffic linear induction device |
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| Publication number | Publication date |
|---|---|
| CN1270339C (en) | 2006-08-16 |
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