CN202487497U - Isolation drive circuit of direct current contactor - Google Patents
Isolation drive circuit of direct current contactor Download PDFInfo
- Publication number
- CN202487497U CN202487497U CN2012200134093U CN201220013409U CN202487497U CN 202487497 U CN202487497 U CN 202487497U CN 2012200134093 U CN2012200134093 U CN 2012200134093U CN 201220013409 U CN201220013409 U CN 201220013409U CN 202487497 U CN202487497 U CN 202487497U
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- contactor
- drive circuit
- driver element
- power supply
- semiconductor driver
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- 238000002955 isolation Methods 0.000 title abstract description 15
- 239000004065 semiconductor Substances 0.000 claims abstract description 34
- 230000008878 coupling Effects 0.000 claims abstract description 8
- 238000010168 coupling process Methods 0.000 claims abstract description 8
- 238000005859 coupling reaction Methods 0.000 claims abstract description 8
- 230000035807 sensation Effects 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 1
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Abstract
The utility model discloses an isolation drive circuit of a direct current contactor. The isolation drive circuit comprises a signal isolation unit and a semiconductor drive unit, and is characterized in that the signal isolation unit is respectively connected with a control signal source and an input terminal of the semiconductor drive unit; and two drive current terminals at an output terminal of the semiconductor drive unit are respectively connected with two ends of a control solenoid of a direct current contactor. An optical coupler or a coupling transformer can be adopted by the signal isolation unit. An MOSFET can be employed by the semiconductor drive unit to serve as a switch element. According to the technical scheme of the utility model, application problems such as safe isolation, poor contact and poor anti-vibration performance during drive operation of the direct current contactor are solved; costs for realizing the isolation drive circuit are low; the reliability for contactor control can be substantially improved; and the cost performance of the isolation drive circuit is high.
Description
Technical field
The utility model belongs to the applications of electronic circuitry technical field, relates in particular to a kind of isolated drive circuit of D.C. contactor.
Background technology
Existing D.C. contactor drive circuit can be divided into isolates and does not isolate two big types; For the low contactor of some line bag voltages; Can adopt not isolated drive, and be higher than the contactor of safe voltage (36Vdc), then must adopt isolated drive for some line bag voltages.And, not only need isolation drive for the more abominable occasion of some vibration environments, also need consider the service behaviour of anti-vibration.
Existing D.C. contactor isolated drive circuit adopts following implementation usually:
Summary of the invention
The purpose of the utility model is to solve application problems such as safe isolation, poor contact of contacts, anti-vibration performance that D.C. contactor runs in driving be not good, and for achieving the above object, the utility model is realized through following technical scheme:
A kind of isolated drive circuit of D.C. contactor; Comprise Signal Spacing unit and semiconductor driver element; The Signal Spacing unit is connected with the input of control signal source with the semiconductor driver element respectively, and two drive current terminals of semiconductor driver element output are connected with the two ends of the control line bag of D.C. contactor respectively.
Said Signal Spacing unit comprises light sensation isolating device and stabilized voltage power supply, and the light sensation isolating device is connected with control signal source, stabilized voltage power supply and semiconductor driver element input respectively.
Said light sensation isolating device is a photoelectrical coupler, and the positive pole of light-emitting diode is connected with the control signal source through current-limiting resistance in the photoelectrical coupler, and the negative pole of light-emitting diode connects signal ground; The collector electrode of phototriode is connected with stabilized voltage power supply in the photoelectrical coupler, and the emitter-base bandgap grading of phototriode is connected with first gate electrode resistance of semiconductor driver element input.
Said Signal Spacing unit further is magnetic strength isolating device and peripheral circuit thereof, and the output of magnetic strength isolating device is connected with semiconductor driver element input.
Said magnetic strength isolating device is a transformer, an end ground connection of transformer first siding ring, and the other end is connected with the control signal source with switching circuit through current-limiting resistance; Transformer secondary lateral coil one termination power ground, the other end is connected with first gate electrode resistance of semiconductor driver element.
Said semiconductor driver element comprises MOSFET and gate electrode resistance, and the MOSFET source electrode connects power supply ground, and is connected with grid through second gate electrode resistance; The MOSFET grid is connected with first gate electrode resistance; The MOSFET drain electrode is connected with the control line bag of diode cathode and D.C. contactor.
Said stabilized voltage power supply is independently insulating power supply, three-terminal voltage-stabilizing module or switch voltage-stabilizing integrated circuit.
Adopt the technical scheme of the utility model; Application problems such as safe isolation, poor contact of contacts, anti-vibration performance that D.C. contactor runs in driving be not good have been solved; That not only realizes is with low cost, and can significantly improve the reliability of contactor control, has high cost performance.
Description of drawings
According to accompanying drawing and embodiment the utility model is done further explain below.
The electrical block diagram of the D.C. contactor isolated drive circuit that Fig. 1 provides for prior art scheme 1;
The electrical block diagram of the D.C. contactor isolated drive circuit that Fig. 2 provides for prior art scheme 2;
The electrical block diagram of the D.C. contactor isolated drive circuit that Fig. 3 provides for the utility model embodiment 1;
The electrical block diagram of the D.C. contactor isolated drive circuit that Fig. 4 provides for the utility model embodiment 2.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is described further.
The electrical block diagram of the D.C. contactor isolated drive circuit that Fig. 3 provides for the utility model embodiment 1; As shown in Figure 3; This circuit comprises Signal Spacing unit 1 and semiconductor driver element 2; Signal Spacing unit 1 is connected with the input of control signal source with semiconductor driver element 2 respectively, and two drive current terminal A1 of semiconductor driver element output are connected with the two ends of D.C. contactor control line bag KM respectively with A2.
Wherein Signal Spacing unit 1 comprises light sensation isolating device 301 and stabilized voltage power supply 302, and the light sensation isolating device is connected with control signal source, stabilized voltage power supply and semiconductor driver element 2 inputs respectively.
Said light sensation isolating device 301 can be photoelectrical coupler.The positive pole of light-emitting diode is connected with the control signal source through current-limiting resistance R1 in the photoelectrical coupler, and the negative pole of light-emitting diode is connected with signal ground; The collector electrode of phototriode is connected with stabilized voltage power supply in the photoelectrical coupler, and the emitter-base bandgap grading of phototriode is connected with the first gate electrode resistance R2 of semiconductor driver element input.Said stabilized voltage power supply 302 can be independently insulating power supply, three-terminal voltage-stabilizing module or switch voltage-stabilizing integrated circuit.The stabilized voltage power supply input is connected with DC power supply Vdc, and output is connected with the collector electrode of phototriode.The emitter-base bandgap grading of phototriode is the input control signal of semiconductor driver element.
The electrical block diagram of the D.C. contactor isolated drive circuit that Fig. 4 provides for the utility model embodiment 2; As shown in Figure 4; This circuit comprises Signal Spacing unit 1 and semiconductor driver element 2; Signal Spacing unit 1 is connected with the input of control signal source with semiconductor driver element 2 respectively, and two drive current terminal A1 of semiconductor driver element output are connected with the two ends of D.C. contactor control line bag KM respectively with A2.
Wherein Signal Spacing unit 1 comprises magnetic strength isolating device and peripheral circuit thereof, and the output of magnetic strength isolating device is connected with semiconductor driver element input.
Wherein, the magnetic strength isolating device can be coupling transformer, coupling transformer one-level lateral coil one end ground connection, and the other end is connected with the control signal source through switching circuit and the current-limiting resistance R0 that current-limiting resistance R1, triode Q1, Q2 form.In the switching circuit that said triode Q1, Q2 form, the common port of Q1 and Q2 emitter is connected current-limiting resistance R1, and the common port of base stage connects current-limiting resistance R0, and the collector electrode of Q1 is connected with positive voltage source Vcc, and the collector electrode of Q2 is connected with power supply ground.When input control signal for just and voltage during greater than Vge, the Q1 conducting, Q2 ends; When input control signal is zero, the Q2 conducting, Q1 ends.Coupling transformer secondary lateral coil one end is connected with power supply ground, and the other end is connected with the first gate electrode resistance R2 of semiconductor driver element.
The technical scheme that adopts the utility model embodiment to provide; Application problems such as safe isolation, poor contact of contacts, anti-vibration performance that D.C. contactor runs in driving be not good have been solved; That not only realizes is with low cost; And can significantly improve the reliability of contactor control, have high cost performance.
According to above-mentioned technical characterstic, the utility model is mainly used in the drive controlling occasion of D.C. contactor, the occasion of particularly having relatively high expectations to vibration environment, such as: mobile devices such as automobile, train; Semiconductor switch is adopted in contactor control, and contactless design has avoided producing in the transfer process of contact the sparkover problem, and therefore the life of product of raising and reliability also are applicable to industries such as inflammable and explosive oil field, probing.
Above-mentioned preferred embodiment and the institute's application technology principle that is merely the utility model; Any technical staff who is familiar with the present technique field is in the technical scope that the utility model discloses; The variation that can expect easily or replacement all should be encompassed in the protection range of the utility model.
Claims (7)
1. the isolated drive circuit of a D.C. contactor; Comprise Signal Spacing unit and semiconductor driver element; It is characterized in that; The Signal Spacing unit is connected with the input of control signal source with the semiconductor driver element respectively, and two drive current terminals of semiconductor driver element output are connected with the two ends of the control line bag of D.C. contactor respectively.
2. the isolated drive circuit of D.C. contactor according to claim 1; It is characterized in that; Said Signal Spacing unit comprises light sensation isolating device and stabilized voltage power supply, and the light sensation isolating device is connected with control signal source, stabilized voltage power supply and semiconductor driver element input respectively.
3. the isolated drive circuit of D.C. contactor according to claim 2; It is characterized in that; Said light sensation isolating device is a photoelectrical coupler, and the positive pole of light-emitting diode is connected with the control signal source through current-limiting resistance in the photoelectrical coupler, and the negative pole of light-emitting diode connects signal ground; The collector electrode of phototriode is connected with the output of stabilized voltage power supply in the photoelectrical coupler, and the emitter-base bandgap grading of phototriode is connected with first gate electrode resistance of semiconductor driver element input.
4. the isolated drive circuit of D.C. contactor according to claim 1 is characterized in that, said Signal Spacing unit is magnetic strength isolating device and peripheral circuit thereof, and the output of magnetic strength isolating device is connected with semiconductor driver element input.
5. the isolated drive circuit of D.C. contactor according to claim 4; It is characterized in that; Said magnetic strength isolating device is a coupling transformer, an end ground connection of coupling transformer first siding ring, and the other end is connected with the control signal source with switching circuit through current-limiting resistance; Coupling transformer second siding ring one termination power ground, the other end is connected with first gate electrode resistance of semiconductor driver element.
6. according to the isolated drive circuit of the arbitrary described D.C. contactor of claim 1-5, it is characterized in that said semiconductor driver element comprises MOSFET and gate electrode resistance, the MOSFET source electrode connects power supply ground, and is connected with grid through second gate electrode resistance; The MOSFET grid is connected with first gate electrode resistance; The MOSFET drain electrode is connected with the control line bag of diode cathode and D.C. contactor.
7. according to the isolated drive circuit of claim 2 or 3 described D.C. contactors; It is characterized in that; Said stabilized voltage power supply is independently insulating power supply, three-terminal voltage-stabilizing module or switch voltage-stabilizing integrated circuit; The input of stabilized voltage power supply is connected with DC power supply, and output is connected with the collector electrode of phototriode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200134093U CN202487497U (en) | 2012-01-12 | 2012-01-12 | Isolation drive circuit of direct current contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200134093U CN202487497U (en) | 2012-01-12 | 2012-01-12 | Isolation drive circuit of direct current contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202487497U true CN202487497U (en) | 2012-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200134093U Expired - Lifetime CN202487497U (en) | 2012-01-12 | 2012-01-12 | Isolation drive circuit of direct current contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202487497U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378252A (en) * | 2018-10-31 | 2019-02-22 | 隆鑫通用动力股份有限公司 | DC relay drive control circuit |
| KR101958703B1 (en) * | 2017-10-27 | 2019-03-15 | 주식회사 만도 | Start-up circuit of isolation device for vehicle |
-
2012
- 2012-01-12 CN CN2012200134093U patent/CN202487497U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101958703B1 (en) * | 2017-10-27 | 2019-03-15 | 주식회사 만도 | Start-up circuit of isolation device for vehicle |
| CN109378252A (en) * | 2018-10-31 | 2019-02-22 | 隆鑫通用动力股份有限公司 | DC relay drive control circuit |
| CN109378252B (en) * | 2018-10-31 | 2020-11-03 | 隆鑫通用动力股份有限公司 | Direct current relay drive control circuit |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100070, No. 2, building 18, 188, base station, South Fourth Ring Road West, Beijing, Fengtai District Patentee after: Beijing Dinghan Technology Group Co., Ltd. Address before: 100070, No. 2, building 18, 188, base station, South Fourth Ring Road West, Beijing, Fengtai District Patentee before: Beijing Dinghan Technology Co., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121010 |