CN203951461U - A kind of automatic input voltage decision circuitry based on waveform sampling - Google Patents
A kind of automatic input voltage decision circuitry based on waveform sampling Download PDFInfo
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- CN203951461U CN203951461U CN201420404823.6U CN201420404823U CN203951461U CN 203951461 U CN203951461 U CN 203951461U CN 201420404823 U CN201420404823 U CN 201420404823U CN 203951461 U CN203951461 U CN 203951461U
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Abstract
The utility model discloses a kind of automatic input voltage decision circuitry based on waveform sampling, comprising: a rectification circuit, and this rectification circuit is for converting input current to a direct current V1; One voltage signal sampling circuit, this voltage signal sampling circuit is for carrying out voltage signal sampling and obtain the voltage signal Vin after a sampling this direct current V1; One treatment circuit, this treatment circuit is for judging the type of this input current according to the waveform difference of this direct current V1 and this voltage signal Vin.
Description
Technical field
The utility model relates to a kind of voltage signal control circuit, relates in particular to a kind of automatic input voltage decision circuitry based on waveform sampling.
Background technology
Because whole world electrical network kind is very many, even exist multiple voltage input in same country or area simultaneously, for machine can normally be moved, therefore just seem extremely important for the judgement of input voltage.The judgement of traditional input voltage be substantially by people for a change hardware play the effect of an input voltage judgement, or realize by loaded down with trivial details hardware logic electric circuit, its shortcoming is for operation is unreliable, trouble.But, based on the automatic input voltage decision circuitry of waveform sampling, employing be the automatic decision that hardware-software combines, so the automatic input voltage decision circuitry based on waveform sampling has become the development trend of follow-up input voltage judgement.
Utility model content
In order to overcome defect of the prior art, the utility model provides a kind of automatic input voltage decision circuitry based on waveform sampling.
In order to realize above-mentioned utility model object, the utility model discloses a kind of automatic input voltage decision circuitry based on waveform sampling, comprising:
One rectification circuit, this rectification circuit is for converting input current to a direct current V1; One voltage signal sampling circuit, this voltage signal sampling circuit is for carrying out voltage signal sampling and obtain the voltage signal Vin after a sampling this direct current V1; One treatment circuit, this treatment circuit is for judging the type of this input current according to the waveform difference of this direct current V1 and this voltage signal Vin.
Further, this input current is 380 volts of alternating currents of three-phase or 220 volts of alternating currents of three-phase or 380 volts of alternating currents of individual event or 220 volts of alternating currents of individual event.
Further, the waveform of this voltage signal Vin is consistent with direct current V1.
Further, this voltage signal sampling circuit comprises a comparator, an optocoupler and an operational amplifier, this comparator is used for comparing the shunting magnitude of voltage of direct current V1 and according to the break-make of this optocoupler of comparative result control, the output valve of this optocoupler is output after this operational amplifier amplifies.
Further, after the filtering of this direct current V1 output, be connected with resistance R 3, the output of resistance R 3 is connected after a resistance R 4 and is connected with the positive input terminal of this comparator; After the output series resistance R2 of resistance R 3, R5, R6, be connected with the negative input end of this comparator.
Further, the output of this comparator is connected with a resistance R 7, and the output of this resistance R 7 is connected with the input of this optocoupler.
Compared with prior art, the automatic input voltage decision circuitry based on waveform sampling provided by the utility model, circuit design is short and sweet, saves cost, and it is little that circuit takies real space, simple to operate, easy to use and stable.Automatic input voltage decision circuitry based on waveform sampling provided by the utility model judges that to system input voltage the time is short, and reaction is fast, output signal and microprocessor seamless link.
Brief description of the drawings
Can describe in detail and appended graphic being further understood by following utility model about advantage of the present utility model and spirit.
Fig. 1 is the hardware configuration schematic diagram of the related automatic input voltage decision circuitry of the utility model;
Fig. 2 is the electric current structural representation of the related automatic input voltage decision circuitry of the utility model;
Fig. 3 is the decision flow chart of the related automatic input voltage decision circuitry of the utility model.
Embodiment
Describe the automatic input voltage decision circuitry based on waveform sampling of a kind of specific embodiment of the present utility model in detail below in conjunction with accompanying drawing.But, the utility model should be understood as and be not limited to this execution mode described below, and technical concept of the present utility model can be implemented with other known technologies or the combination of function other technologies identical with those known technologies.
Fig. 1 is the hardware configuration schematic diagram of the related automatic input voltage decision circuitry of the utility model.As shown in fig. 1, after alternating current input, through over commutation device 101, alternating current is converted to direct current by rectifier 101.Voltage signal sampling circuit 102 is isolated sampling to direct current.Current signal after sampling judges the type of the alternating current of input after microprocessor 103 computings.
Fig. 2 is the electric current structural representation of the related automatic input voltage decision circuitry of the utility model.The particular circuit configurations of rectifier 101 and voltage signal sampling circuit 102 has been shown in Fig. 2.Input AC electricity becomes direct current V1 by rectifier 101, by voltage signal sampling buffer circuit 102, V1 is carried out to voltage signal sampling Vin again, the waveform of Vin is consistent with V1, and send the voltage signal of sampling to microprocessor, finally judge inputting electricity according to the program of numbering in advance in microprocessor.
The three-phase of input current connects respectively at diode D1, D2, D3, D4, D5, D6, forms a three-phase commutation bridge.Alternating current is converted to direct current V1 by three-phase commutation bridge.V1 is in parallel with a capacitor C 2 and resistance R 1 for filtering as the input of voltage signal sampling circuit 102.After the filtering of this direct current V1 output, be connected with resistance R 3, the output of resistance R 3 is connected after a resistance R 4 and is connected with the positive input terminal of this comparator; After the output series resistance R2 of resistance R 3, R5, R6, be connected with the negative input end of comparator U1.The positive input terminal of comparator U1 also connects a capacitor C 3.
The output of comparator U1 is connected a resistance R 7 afterwards and the input of conduct isolation optocoupler.The output of isolation optocoupler connects an operational amplification circuit U2.The output of the operational amplification circuit U2 rear acquisition one sampled voltage Vin of a resistance R 9 that connects.
, go out mean value V and the given electrical voltage point v of processor of commutating voltage, and comparison point is arranged on to V-v place by hardware circuit design in the obvious difference of waveform of the direct voltage V1 after over commutation according to single-phase electricity and three-phase electricity, v value must be appropriate.
Fig. 3 is the decision flow chart of the related automatic input voltage decision circuitry of the utility model.As shown in Figure 3, first judge that input current is three-phase or single-phase, then judge the magnitude of voltage size of input current.
Concrete determining step is as follows: step 301: judge whether Vin is less than the following v of mean value V, and v chooses voluntarily, need appropriate.Step 302: if be judged as very count value N+1; Otherwise, return to 301 continuation cycle criterions.In n the input cycle of step 303 circulation, judge whether N is greater than prior set point m.In the present embodiment, default m is 40.If be judged as very, be input as single-phase electricity 308; Otherwise be input as three-phase electricity 304.Judge respectively whether Vin is greater than given comparison value (being slightly less than 380V), step 305 or 309.If be judged as very, be input as 380V; Otherwise be input as 220V.Vin is that V1 entered the weak electric signal that dividing potential drop buffer circuit is converted to, and comparison value V and Vcom all need to dwindle corresponding ratio.
Compared with prior art, the automatic input voltage decision circuitry based on waveform sampling provided by the utility model, circuit design is short and sweet, saves cost, and it is little that circuit takies real space, simple to operate, easy to use and stable.Automatic input voltage decision circuitry based on waveform sampling provided by the utility model judges that to system input voltage the time is short, and reaction is fast, output signal and microprocessor seamless link.
Described in this specification is preferred embodiment of the present utility model, and above embodiment is only in order to the technical solution of the utility model to be described but not to restriction of the present utility model.All those skilled in the art comply with design of the present utility model by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be within scope of the present utility model.
Claims (6)
1. the automatic input voltage decision circuitry based on waveform sampling, is characterized in that, comprising:
One rectification circuit, described rectification circuit is for converting input current to a direct current V1;
One voltage signal sampling circuit, described voltage signal sampling circuit is for carrying out voltage signal sampling and obtain the voltage signal Vin after a sampling described direct current V1;
One treatment circuit, described treatment circuit is for judging the type of described input current according to the waveform difference of described direct current V1 and described voltage signal Vin.
2. the automatic input voltage decision circuitry based on waveform sampling as claimed in claim 1, is characterized in that, described input current is 380 volts of alternating currents of three-phase or 220 volts of alternating currents of three-phase or 380 volts of alternating currents of individual event or 220 volts of alternating currents of individual event.
3. the automatic input voltage decision circuitry based on waveform sampling as claimed in claim 1, is characterized in that, the waveform of described voltage signal Vin is consistent with direct current V1.
4. the automatic input voltage decision circuitry based on waveform sampling as claimed in claim 1, it is characterized in that, described voltage signal sampling circuit comprises a comparator, an optocoupler and an operational amplifier, described comparator is used for comparing the shunting magnitude of voltage of direct current V1 and according to the break-make of optocoupler described in comparative result control, the output valve of described optocoupler is output after described operational amplifier amplifies.
5. the automatic input voltage decision circuitry based on waveform sampling as claimed in claim 4, is characterized in that, after the filtering of described direct current V1 output, is connected with resistance R 3, and the output of resistance R 3 is connected after a resistance R 4 and is connected with the positive input terminal of described comparator; After the output series resistance R2 of resistance R 3, R5, R6, be connected with the negative input end of described comparator.
6. the automatic input voltage decision circuitry based on waveform sampling as claimed in claim 4, is characterized in that, the output of described comparator is connected with a resistance R 7, and the output of described resistance R 7 is connected with the input of described optocoupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420404823.6U CN203951461U (en) | 2014-07-22 | 2014-07-22 | A kind of automatic input voltage decision circuitry based on waveform sampling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420404823.6U CN203951461U (en) | 2014-07-22 | 2014-07-22 | A kind of automatic input voltage decision circuitry based on waveform sampling |
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| Publication Number | Publication Date |
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| CN203951461U true CN203951461U (en) | 2014-11-19 |
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| CN201420404823.6U Withdrawn - After Issue CN203951461U (en) | 2014-07-22 | 2014-07-22 | A kind of automatic input voltage decision circuitry based on waveform sampling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076186A (en) * | 2014-07-22 | 2014-10-01 | 上海威特力焊接设备制造股份有限公司 | Automatic input voltage judging circuit based on waveform sampling |
-
2014
- 2014-07-22 CN CN201420404823.6U patent/CN203951461U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076186A (en) * | 2014-07-22 | 2014-10-01 | 上海威特力焊接设备制造股份有限公司 | Automatic input voltage judging circuit based on waveform sampling |
| CN104076186B (en) * | 2014-07-22 | 2016-09-28 | 上海威特力焊接设备制造股份有限公司 | A kind of based on waveform sampling automatically enter voltage decision circuitry |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141119 Effective date of abandoning: 20160928 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |