CN203722469U - Contactless power source switching circuit - Google Patents
Contactless power source switching circuit Download PDFInfo
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- CN203722469U CN203722469U CN201420105853.7U CN201420105853U CN203722469U CN 203722469 U CN203722469 U CN 203722469U CN 201420105853 U CN201420105853 U CN 201420105853U CN 203722469 U CN203722469 U CN 203722469U
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- module
- triode
- power source
- tongue tube
- pin
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- 239000003990 capacitor Substances 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 4
- 235000014676 Phragmites communis Nutrition 0.000 abstract 4
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
The utility model belongs to the power source switching technical field and relates to a contactless power source switching circuit. The contactless power source switching circuit is characterized in that the contactless power source switching circuit comprises a reed switch triggering module and a power source switch-off module which are connected with a PMOS tube module; the contactless power source switching circuit further comprises a triode module; the PMOS tube module, the power source switch-off module and the reed switch triggering module are respectively connected with the triode module; the reed switch triggering module and the power source switch-off module respectively receive signals of a reed switch and equipment so as to jointly control the switching on and switching off of the triode module; the PMOS tube module receives signals of the triode module so as to be switched on and switched off; and the PMOS tube module controls the switching on and switching off of an external power source and equipment. With the contactless power source switching circuit of the utility model adopted, a magnet can be adopted to control the switching on and switching off of the power source, and the equipment can autonomously switch off the external power source, and therefore, the switching on and switching off of the power source can be controlled without direct contact required. Thus, the contactless power source switching circuit is advantageous in high safety and favorable reliability.
Description
Technical field
The utility model relates to mains switch technical field, relates in particular to a kind of contact-free power switch circuit.
Background technology
For the access way of external dc power, current equipment generally adopts electric wire direct-connected, the modes such as switch-controlled and Control formula.Above-mentioned technology all has pluses and minuses separately.Use the direct-connected method access of electric wire power supply, on hardware, the most easily realize, only need two lines of both positive and negative polarity, reliable operation.But the direct-connected method of electric wire is operation inconvenience when startup and closing device, need directly connect and pull off cable with hand, and easily introduce peaking voltage and electric current.As operation in the system of high-voltage large current has certain danger.Switch control mode is simplified many in operating aspect, but still needs manual operation during operation, and can insertion switch shake, and switch block must be able to bear the electric current and voltage of power supply, easily aging.Relay control mode is separated control circuit and power circuit, in fail safe, greatly promotes.But its hardware configuration is slightly complicated, and reliability need think over.In addition, all there is a common defects in appeal method, and equipment cannot independently cut off external power source, and powered-down must rely on manual operation or realize via other independent current source management equipments, and this is very disadvantageous for some emergency.
Utility model content
The purpose of this utility model is to provide a kind of contact-free power switch circuit, has preferably fail safe, reliability and ease for use.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals:
A kind of contact-free power switch circuit, comprise the tongue tube trigger module and the power remove module that are connected with PMOS tube module, also comprise triode module, described PMOS tube module, power remove module, tongue tube trigger module are all connected with triode module, described tongue tube trigger module and power remove module receive respectively the break-make of the signal co-controlling triode module of tongue tube and equipment, described PMOS tube module receives the signal of triode module and conducting and shutoff, and described PMOS tube module is controlled the break-make of external power source and equipment.
When magnet approaches tongue tube, after tongue tube is triggered, tongue tube trigger module output high level, the conducting of triode module.Triode conducting makes PMOS conducting, electric power starting.After electric power starting, power remove module output high level, makes triode module close at tongue tube trigger module the maintenance conducting of having no progeny, and power supply is held open state.When rear end equipment output powered-down signal, the output of power remove module is dragged down, triode module shuts down, and PMOS tube module turn-offs, and power supply disconnects.With magnet, can control power remove, can cut off external power source by equipment autonomously yet, directly contact can not controlled power remove, and fail safe, reliability are better.
Further, described tongue tube trigger module is comprised of chip P1, resistance R 1, R2, capacitor C 1, diode D1, tongue tube, magnet, the 1 pin ground connection of described chip P1,2,3 pin are connected with tongue tube, 4 pin connect input power, described resistance R 1, R2 carry out dividing potential drop to input voltage, capacitor C 1 filtering shake voltage, and dividing potential drop exports triode module to by diode D1.
Further, described power remove module comprises chip P2 and current-limiting resistance R4, R6,1 pin of described chip P2 is that out-put supply pin, 2 pin are output pin, the 3 pin ground connection of equipment cut-off signals, and current-limiting resistance R4, R6 are to triode module output control signal.
Further, described PMOS tube module comprises PMOS pipe Q2, resistance R 3, capacitor C 2, and described PMOS pipe Q2 is also connected with voltage stabilizing didoe D2, the anodal connecting triode module of voltage stabilizing didoe D2.
Further, described triode module comprises PNP triode Q1 and earth resistance R5, and the C level of PNP triode Q1 is controlled the switch of PMOS module, and B level receives the control signal of tongue tube trigger module and power remove module.
The beneficial effects of the utility model are: with magnet, can control power remove, can cut off external power source by equipment autonomously yet, directly contact can not controlled power remove, and fail safe, reliability are better.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is tongue tube trigger module schematic diagram;
Fig. 3 is power remove module principle figure;
Fig. 4 is PMOS tube module schematic diagram;
Fig. 5 is triode module principle figure.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail:
Embodiment 1:
As shown in Figure 1, a kind of contact-free power switch circuit, comprise the tongue tube trigger module and the power remove module that are connected with PMOS tube module, also comprise triode module, described PMOS tube module, power remove module, tongue tube trigger module are all connected with triode module, described tongue tube trigger module and power remove module receive respectively the break-make of the signal co-controlling triode module of tongue tube and equipment, described PMOS tube module receives the signal of triode module and conducting and shutoff, and described PMOS tube module is controlled the break-make of external power source and equipment.
As shown in Figure 2, described tongue tube trigger module is comprised of chip P1, resistance R 1, R2, capacitor C 1, diode D1, tongue tube, magnet, the 1 pin ground connection of described chip P1,2,3 pin are connected with tongue tube, 4 pin connect input power, described resistance R 1, R2 carry out dividing potential drop to input voltage, capacitor C 1 filtering shake voltage.When tongue tube and magnet are close, tongue tube 2,3 conductings, the dividing potential drop of power supply exports triode module to by diode D1.Otherwise, when tongue tube and magnet away from time, the dividing potential drop of power supply does not export triode module to.
As shown in Figure 3, described power remove module comprises chip P2 and current-limiting resistance R4, R6, and 1 pin of described chip P2 is that out-put supply pin, 2 pin are output pin, the 3 pin ground connection of equipment cut-off signals.R4 and R6 are current-limiting resistance, to triode module output control signal.
As shown in Figure 4, described PMOS tube module comprises PMOS pipe Q2, resistance R 3, capacitor C 2, and described PMOS pipe Q2 is also connected with voltage stabilizing didoe D2.Q2 is PMOS pipe, conducting when Vgs is negative.D2 is voltage stabilizing didoe, anodal connecting triode module, and when triode module is opened, D2 and R3 can guarantee Q2 conducting and not damage.When triode module is closed, D2 and R3 can guarantee that Q2 turn-offs.C2 is used for filtering the false triggering that external power powered on moment is caused by self metal-oxide-semiconductor interelectrode capacitance.
As shown in Figure 5, described triode module comprises PNP triode Q1 and earth resistance R5.For the C level of PNP triode Q1, control the switch of PMOS module, B level receives the control signal of tongue tube trigger module and power remove module.
Module specific works flow process is as follows: during beginning, power supply disconnects, when magnet approaches tongue tube, and after tongue tube is triggered, tongue tube trigger module output high level, the conducting of triode module.Triode conducting makes PMOS conducting, electric power starting.After electric power starting, power remove module output high level, makes triode module close at tongue tube trigger module the maintenance conducting of having no progeny, and power supply is held open state.When rear end equipment output powered-down signal, the output of power remove module is dragged down, triode module shuts down, and PMOS tube module turn-offs, and power supply disconnects.
In a word, the foregoing is only preferred embodiment of the present utility model, all equalizations of doing according to the utility model claim change and modify, and all should belong to the covering scope of the utility model patent.
Claims (5)
1. a contact-free power switch circuit, it is characterized in that: comprise the tongue tube trigger module and the power remove module that are connected with PMOS tube module, also comprise triode module, described PMOS tube module, power remove module, tongue tube trigger module are all connected with triode module, described tongue tube trigger module and power remove module receive respectively the break-make of the signal co-controlling triode module of tongue tube and equipment, described PMOS tube module receives the signal of triode module and conducting and shutoff, and described PMOS tube module is controlled the break-make of external power source and equipment.
2. contact-free power switch circuit according to claim 1, it is characterized in that: described tongue tube trigger module is comprised of chip P1, resistance R 1, R2, capacitor C 1, diode D1, tongue tube, magnet, the 1 pin ground connection of described chip P1,2,3 pin are connected with tongue tube, 4 pin connect input power, described resistance R 1, R2 carry out dividing potential drop to input voltage, capacitor C 1 filtering shake voltage, and dividing potential drop exports triode module to by diode D1.
3. contact-free power switch circuit according to claim 1, it is characterized in that: described power remove module comprises chip P2 and current-limiting resistance R4, R6,1 pin of described chip P2 is that out-put supply pin, 2 pin are output pin, the 3 pin ground connection of equipment cut-off signals, and current-limiting resistance R4, R6 are to triode module output control signal.
4. contact-free power switch circuit according to claim 1, it is characterized in that: described PMOS tube module comprises PMOS pipe Q2, resistance R 3, capacitor C 2, described PMOS pipe Q2 is also connected with voltage stabilizing didoe D2, the anodal connecting triode module of voltage stabilizing didoe D2.
5. contact-free power switch circuit according to claim 1, it is characterized in that: described triode module comprises PNP triode Q1 and earth resistance R5, the C level of PNP triode Q1 is controlled the switch of PMOS module, and B level receives the control signal of tongue tube trigger module and power remove module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420105853.7U CN203722469U (en) | 2014-03-07 | 2014-03-07 | Contactless power source switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420105853.7U CN203722469U (en) | 2014-03-07 | 2014-03-07 | Contactless power source switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203722469U true CN203722469U (en) | 2014-07-16 |
Family
ID=51161592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420105853.7U Expired - Fee Related CN203722469U (en) | 2014-03-07 | 2014-03-07 | Contactless power source switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203722469U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107807709A (en) * | 2016-09-09 | 2018-03-16 | 中国石油化工股份有限公司 | A kind of nearly drill bit instrument power source management system and method for managing power supply |
| CN108738816A (en) * | 2018-05-18 | 2018-11-06 | 重庆春丰森科技有限公司 | A kind of dedicated intelligent vase of fresh flower |
| CN110071635A (en) * | 2018-01-24 | 2019-07-30 | 中科院微电子研究所昆山分所 | A kind of power on-off control circuit |
-
2014
- 2014-03-07 CN CN201420105853.7U patent/CN203722469U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107807709A (en) * | 2016-09-09 | 2018-03-16 | 中国石油化工股份有限公司 | A kind of nearly drill bit instrument power source management system and method for managing power supply |
| CN110071635A (en) * | 2018-01-24 | 2019-07-30 | 中科院微电子研究所昆山分所 | A kind of power on-off control circuit |
| CN108738816A (en) * | 2018-05-18 | 2018-11-06 | 重庆春丰森科技有限公司 | A kind of dedicated intelligent vase of fresh flower |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20190307 |