CN209372979U - A kind of three-phase alternating current phase sequence testing circuit - Google Patents
A kind of three-phase alternating current phase sequence testing circuit Download PDFInfo
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- CN209372979U CN209372979U CN201920045053.3U CN201920045053U CN209372979U CN 209372979 U CN209372979 U CN 209372979U CN 201920045053 U CN201920045053 U CN 201920045053U CN 209372979 U CN209372979 U CN 209372979U
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Abstract
The utility model discloses a kind of three-phase alternating current phase sequence testing circuits, including the sampling phase shift block to the sampling of three-phase alternating current real-time perfoming and phase shift processing, the whether identical multilevel iudge module differentiated of three-phase phase to the sampling phase shift block output and the conversion output module being modulated to the output signal of the multilevel iudge module；The level signal of the conversion output module output acceptable phase sequence correctness of CPU；The sampling phase shift block, multilevel iudge module, conversion output module are successively sequentially electrically connected.The utility model carries out sampling phase shift to three-phase alternating current by sampling phase shift block, whether result is normally provided to phase order of 3-phase AC by multilevel iudge module, the acceptable level signal of CPU is exported by conversion output module to identify phase sequence, it reduces the operation burden of CPU and is disturbed degree, significantly improve the correctness of judging phase order.
Description
Technical field
The utility model relates to detect to exchange judging phase order technical field more particularly to a kind of phase order of 3-phase AC
Circuit.
Background technique
Three-phase alternating current is divided into A phase B phase C phase, wherein advanced 120 degree of phase of the C of B phase, and A phase lags 120 degree of C phase.Engineering connection
When Shi Yidan phase sequence wrong, there is more serious influence to load, for example three-phase electricity type load will cause motor by just changing
At reversion, then for example it is directed to the power supply of three-phase input, it is likely that power supply is caused to can not work normally.
The main method of detection three-phase phase-sequence mistake is to work out corresponding software by cpu system come sampling three-phase input at present
Voltage obtains the lead lag relationship of three-phase voltage to judge whether phase sequence is correct, then provides corresponding acousto-optic telecommunications
Number.This method circuit components are more, and CPU computational burden is larger, simultaneously because cpu system belongs to weakness system, to three-phase
Forceful electric power carries out detection judgement, is easy to be caused judging result mistake by electromagnetic interference.
Therefore, the prior art is defective, needs to improve.
Utility model content
The utility model provides a kind of three-phase alternating current phase sequence testing circuit, the above problem of solution.
To solve the above problems, the technical scheme that the utility model is provided is as follows:
A kind of three-phase alternating current phase sequence testing circuit, including simultaneously phase shift processing is adopted to the sampling of three-phase alternating current real-time perfoming
Sample phase shift block, to the whether identical multilevel iudge module differentiated of three-phase phase and right of the sampling phase shift block output
The conversion output module that the output signal of the multilevel iudge module is modulated；The conversion output module output CPU can
The level signal of the phase sequence correctness of receiving；The sampling phase shift block, multilevel iudge module, conversion output module are successively suitable
Sequence is electrically connected.
Preferred technical solution, the sampling phase shift block includes resistance R3, R8, R17, R18, R23, R27, R29, capacitor
C3, C7, C10, C11, C17 and transformer T1-T3.
Preferred technical solution, the first end of the transformer T1-T3 armature winding successively respectively with three-phase alternating current
The connection of LA, LB, LC phase line；The second end of the transformer T1-T3 armature winding is connect with the zero curve of three-phase alternating current；It is described
The second end of transformer T1-T3 secondary windings is grounded；The first end of the transformer T1 secondary windings is with the capacitor C3's
First end connection；The second end of the capacitor C3 is connect with the first end of the resistance R3；The second end of the resistance R3 is distinguished
It is connect with the first end of the first end of the resistance R8, the capacitor C7；The of the second end of the resistance R8, the capacitor C7
Two ends are grounded；The first end of the transformer T2 secondary windings is connect with the first end of the resistance R17；The resistance R17
Second end connect respectively with the first end of the first end of the resistance R18, the capacitor C10；The second end of the resistance R18
It is connect respectively with the first end of the first end of the resistance R23, the capacitor C11；The second end of the resistance R23, the electricity
The second end for holding C10-C11 is grounded；The first end of the transformer T3 secondary windings and the first end of the resistance R27 connect
It connects；The second end of the resistance R27 is connect with the first end of the first end of the resistance R29, the capacitor C17 respectively；It is described
The second end of resistance R29, the second end of the capacitor C17 are grounded.
Preferred technical solution, the transformer T1-T3 are that isolation sampling is used, and primary and secondary winding no-load voltage ratio is 220:
6。
Preferred technical solution, the resistance R3, capacitor C3 form 120 ° forward of phase-shift network；The resistance R17, electricity
Hold the phase-shift network that C10 forms 120 ° backward.
Preferred technical solution, the multilevel iudge module include resistance R11, R15, R20, R21, capacitor C12, C14 and
Integrated circuit U1.
Preferred technical solution, the integrated circuit U1 the 4th, 6,10 pins connect with same voltage reference signal；
The first end of the resistance R20 is connect with the 1st of the integrated circuit U1,2,13 pins respectively；The second end of the resistance R20
It is connect respectively with the second end of the resistance R15, the first end of the resistance R21, the first end of the capacitor C12；The electricity
The second end of resistance R21 is connect with the 9th pin of the first end of the resistance R11, the integrated circuit U1 respectively；The integrated electricity
The 14th pin of road U1 is connect with the first end of the second end of the resistance R11, the capacitor C14 respectively；The integrated circuit
The 8th pin of U1, the second end of the capacitor C14 are grounded；Positive 15V power supply respectively with the first end of the resistance R15, described
The 3rd pin of integrated circuit U1 connects；Negative 15V power supply respectively with the second end of the capacitor C12, the integrated circuit U1
The connection of 12 pins.
Preferred technical solution, the model LM339A of the integrated circuit U1.
Preferred technical solution, the conversion output module include resistance R16, R22, capacitor C13 and diode D4-D5.
Preferred technical solution, the second end of the resistance R22 are connect with the cathode of the diode D4-D5 respectively；Institute
The anode for stating diode D4 is connect with the second end of the resistance R16, the first end of the capacitor C13, the end PHASE respectively；Institute
The second end for stating positive, the described capacitor C13 of diode D5 is grounded；The first end of positive 3.3V power supply and the resistance R16 connect
It connects.
Beneficial effect compared with the existing technology is that using the above scheme, the utility model passes through sampling phase shift block pair
Whether three-phase alternating current carries out sampling phase shift, normally provide as a result, passing through by multilevel iudge module to phase order of 3-phase AC
Conversion output module exports the acceptable level signal of CPU to identify phase sequence, reduces the operation burden of CPU and is disturbed journey
Degree, significantly improves the correctness of judging phase order；Circuit structure is simplified, and used component number is less and extremely common,
With good application prospect.
Detailed description of the invention
Illustrate embodiment or technical solution in the prior art in order to clearer, it below will be to embodiment or the prior art
The required attached drawing used is briefly described in description, it is clear that, the accompanying drawings in the following description is only the one of utility model
A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of three-phase alternating current phase sequence testing circuit functional block diagram of the utility model；
Fig. 2 is a kind of three-phase alternating current phase sequence testing circuit circuit diagram of the utility model.
Specific embodiment
For the ease of understanding the utility model, in the following with reference to the drawings and specific embodiments, the utility model is carried out more detailed
Thin explanation.The preferred embodiment of the utility model is given in attached drawing.But the utility model can be with many different
Form is realized, however it is not limited to this specification described embodiment.On the contrary, purpose of providing these embodiments is makes to this
The understanding of the disclosure of utility model is more thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term used in this specification " fixation ", " integrated molding ",
For illustrative purposes only, the similar unit of structure is to identical label in the figure for "left", "right" and similar statement
Mark.
Unless otherwise defined, technical and scientific term all used in this specification and the skill for belonging to the utility model
The normally understood meaning of the technical staff in art field is identical.Art used in the description of the utility model in this specification
Language, which is only for the purpose of describing specific embodiments, is not intended to limitation the utility model.
As shown in Figs. 1-2, one embodiment of the utility model is:
A kind of three-phase alternating current phase sequence testing circuit, including simultaneously phase shift processing is adopted to the sampling of three-phase alternating current real-time perfoming
Sample phase shift block, to the whether identical multilevel iudge module differentiated of three-phase phase and right of the sampling phase shift block output
The conversion output module that the output signal of the multilevel iudge module is modulated；The conversion output module output CPU can
The level signal of the phase sequence correctness of receiving；The sampling phase shift block, multilevel iudge module, conversion output module are successively suitable
Sequence is electrically connected.
The sampling phase shift block include resistance R3, R8, R17, R18, R23, R27, R29, capacitor C3, C7, C10, C11,
C17 and transformer T1-T3；
The first end of the transformer T1-T3 armature winding successively connects with LA, LB, LC phase line of three-phase alternating current respectively
It connects；The second end of the transformer T1-T3 armature winding is connect with the zero curve of three-phase alternating current；Transformer T1-T3 times
The second end of grade winding is grounded；The first end of the transformer T1 secondary windings is connect with the first end of the capacitor C3；Institute
The second end for stating capacitor C3 is connect with the first end of the resistance R3；The second end of the resistance R3 is respectively with the resistance R8's
First end, the connection of the first end of the capacitor C7；The second end of the resistance R8, the second end of the capacitor C7 are grounded；Institute
The first end for stating transformer T2 secondary windings is connect with the first end of the resistance R17；The second end of the resistance R17 respectively with
The first end of the resistance R18, the connection of the first end of the capacitor C10；The second end of the resistance R18 respectively with the resistance
The first end of R23, the connection of the first end of the capacitor C11；The second of the second end of the resistance R23, the capacitor C10-C11
End is grounded；The first end of the transformer T3 secondary windings is connect with the first end of the resistance R27；The resistance R27's
Second end is connect with the first end of the first end of the resistance R29, the capacitor C17 respectively；The second end of the resistance R29,
The second end of the capacitor C17 is grounded；
The transformer T1-T3 is that isolation sampling is used, and primary and secondary winding no-load voltage ratio is 220:6；The resistance R3, electricity
Hold the phase-shift network that C3 forms 120 ° forward；The resistance R17, capacitor C10 form 120 ° backward of phase-shift network.
The multilevel iudge module includes resistance R11, R15, R20, R21, capacitor C12, C14 and integrated circuit U 1；
The integrated circuit U1 the 5th, 7,11 pins successively connect with the first end of described capacitor C7, C11, C17 respectively；
The integrated circuit U1 the 4th, 6,10 pins connect with same voltage reference signal；The of the resistance R20
One end is connect with the 1st of the integrated circuit U1,2,13 pins respectively；The second end of the resistance R20 respectively with the resistance
The second end of R15, the first end of the resistance R21, the connection of the first end of the capacitor C12；The second end of the resistance R21 point
It is not connect with the 9th pin of the first end of the resistance R11, the integrated circuit U1；The 14th pin of the integrated circuit U1
It is connect respectively with the first end of the second end of the resistance R11, the capacitor C14；The 8th pin of the integrated circuit U1, institute
The second end for stating capacitor C14 is grounded；Positive 15V power supply respectively with the first end of the resistance R15, the integrated circuit U1 the
The connection of 3 pins；Negative 15V power supply is connect with the 12nd pin of the second end of the capacitor C12, the integrated circuit U1 respectively；
The model LM339A of the integrated circuit U1.
The conversion output module includes resistance R16, R22, capacitor C13 and diode D4-D5；
The first end of the resistance R22 is connect with the first end of the capacitor C14；
The second end of the resistance R22 is connect with the cathode of the diode D4-D5 respectively；The anode of the diode D4
It is connect respectively with the second end of the resistance R16, the first end of the capacitor C13, the end PHASE；The anode of the diode D5,
The second end of the capacitor C13 is grounded；Positive 3.3V power supply is connect with the first end of the resistance R16；
The end PHASE is for exporting the low and high level signal of three-phase alternating current phase sequence correctness to the control foot of CPU.
Working principle of the utility model is:
According to advanced 120 degree of phase of the C of B phase, A phase lags 120 degree of this principles of C phase, on the basis of C phase, the corresponding exchange of A
Electric INA is by C3, and the phase-shift network of R3 composition, 120 degree of phase shift, are connected to 5 feet of zero-crossing comparator U1A forward.The corresponding friendship of B
Galvanic electricity INB is by R17, and the phase-shift network of C10 composition, 120 degree of phase shift, are connected to 7 feet of zero-crossing comparator U1B backward.C is corresponding
Alternating current INC by being connected to 11 feet of zero-crossing comparator U1D without phase-shift network.In this way, when three-phase phase-sequence is correct, even
Signal phase to the positive grade output end of three zero-crossing comparator units is exactly equally, without phase difference, then comparator output terminal
1,2,13 just obtain three-phase duty ratio be 50%, the consistent square-wave signal of phase, comparator output terminal 1,2,13 is connected to one
It rises, output signal is exactly the square-wave signal that a duty ratio is 50%；Comparator output terminal 1,2,13 connects when three-phase phase-sequence mistake
Being connected to output signal together is exactly the square-wave signal that duty ratio is far smaller than 50%.R20, R15, C12 form capacitor charge and discharge
Circuit, comparator output terminal 1,2,13 export square-wave signal and are connected to the charge-discharge circuit, when square-wave signal duty ratio is 50%
When left and right, capacitor C12 both end voltage is positive voltage, when square-wave signal duty ratio is far smaller than 50% or so, the both ends capacitor C12
Voltage is negative voltage.Comparator U1D composition is Zero-cross comparator circuit, and capacitor C12 both end voltage is being connected to comparator U1D just
Pole input terminal, capacitor C12 both end voltage is that timing comparator U1D output end 14 is high level, when capacitor C12 both end voltage is negative
Comparator U1D output end 14 is low level, and by diode D4, this low and high level is transmitted a PAHSE by D5, i.e., the one of CPU
A control foot.
The whether correct of phase sequence can be judged by the level of detection this signal of PAHSE for cpu system, when detecting
When PAHSE is high level, three-phase phase-sequence is correct, when detecting PAHSE is low level, three-phase phase-sequence mistake.
It should be noted that above-mentioned each technical characteristic continues to be combined with each other, the various embodiments not being enumerated above are formed,
It is accordingly to be regarded as the range of the utility model specification record；Also, it for those of ordinary skills, can be according to above stating
It is bright to be improved or converted, and all these modifications and variations all should belong to the protection model of the appended claims for the utility model
It encloses.
Claims (10)
1. a kind of three-phase alternating current phase sequence testing circuit, which is characterized in that including three-phase alternating current real-time perfoming is sampled and moved
The sampling phase shift block of phase processor sentences the whether identical comparison differentiated of three-phase phase of the sampling phase shift block output
Disconnected module and the conversion output module that the output signal of the multilevel iudge module is modulated；The conversion output module is defeated
The level signal of the acceptable phase sequence correctness of CPU out；The sampling phase shift block, multilevel iudge module, conversion output
Module is successively sequentially electrically connected.
2. a kind of three-phase alternating current phase sequence testing circuit according to claim 1, which is characterized in that the sampling phase shift mould
Block includes resistance R3, R8, R17, R18, R23, R27, R29, capacitor C3, C7, C10, C11, C17 and transformer T1-T3.
3. a kind of three-phase alternating current phase sequence testing circuit according to claim 2, which is characterized in that the transformer T1-
The first end of T3 armature winding is successively connect with LA, LB, LC phase line of three-phase alternating current respectively；The transformer T1-T3 is primary
The second end of winding is connect with the zero curve of three-phase alternating current；The second end of the transformer T1-T3 secondary windings is grounded；Institute
The first end for stating transformer T1 secondary windings is connect with the first end of the capacitor C3；The second end of the capacitor C3 and the electricity
Hinder the first end connection of R3；The second end of the resistance R3 respectively with the first end of the resistance R8, the capacitor C7 first
End connection；The second end of the resistance R8, the second end of the capacitor C7 are grounded；The first of the transformer T2 secondary windings
End is connect with the first end of the resistance R17；The second end of the resistance R17 respectively with the first end of the resistance R18, described
The first end of capacitor C10 connects；The second end of the resistance R18 respectively with the first end of the resistance R23, the capacitor C11
First end connection；The second end of the resistance R23, the second end of the capacitor C10-C11 are grounded；Transformer T3 times
The first end of grade winding is connect with the first end of the resistance R27；The second end of the resistance R27 respectively with the resistance R29
First end, the first end of the capacitor C17 connection；The second end of the resistance R29, the second end of the capacitor C17 connect
Ground.
4. a kind of three-phase alternating current phase sequence testing circuit according to claim 2 or 3, which is characterized in that the transformation
Device T1-T3 is that isolation sampling is used, and primary and secondary winding no-load voltage ratio is 220:6.
5. a kind of three-phase alternating current phase sequence testing circuit according to claim 4, which is characterized in that the resistance R3, electricity
Hold the phase-shift network that C3 forms 120 ° forward；The resistance R17, capacitor C10 form 120 ° backward of phase-shift network.
6. a kind of three-phase alternating current phase sequence testing circuit according to claim 1, which is characterized in that the multilevel iudge mould
Block includes resistance R11, R15, R20, R21, capacitor C12, C14 and integrated circuit U 1.
7. a kind of three-phase alternating current phase sequence testing circuit according to claim 6, which is characterized in that the integrated circuit U1
The 4th, 6,10 pins connect with same voltage reference signal；The first end of the resistance R20 respectively with the integrated circuit
U1 the 1st, 2,13 pins connection；The second end of the resistance R20 respectively with the second end of the resistance R15, the resistance R21
First end, the first end of the capacitor C12 connection；The second end of the resistance R21 respectively with the resistance R11 first
The 9th pin connection at end, the integrated circuit U1；The 14th pin of the integrated circuit U1 respectively with the resistance R11
The first end connection at two ends, the capacitor C14；The 8th pin of the integrated circuit U1, the second end of the capacitor C14 connect
Ground；Positive 15V power supply is connect with the 3rd pin of the first end of the resistance R15, the integrated circuit U1 respectively；Negative 15V power supply point
It is not connect with the 12nd pin of the second end of the capacitor C12, the integrated circuit U1.
8. a kind of three-phase alternating current phase sequence testing circuit according to claim 6 or 7, which is characterized in that described integrated
The model LM339A of circuit U 1.
9. a kind of three-phase alternating current phase sequence testing circuit according to claim 1, which is characterized in that the conversion exports mould
Block includes resistance R16, R22, capacitor C13 and diode D4-D5.
10. a kind of three-phase alternating current phase sequence testing circuit according to claim 9, which is characterized in that the resistance R22's
Second end is connect with the cathode of the diode D4-D5 respectively；The anode of the diode D4 respectively with the resistance R16 the
Two ends, the first end of the capacitor C13, the connection of the end PHASE；The second end of positive, the described capacitor C13 of the diode D5 is equal
Ground connection；Positive 3.3V power supply is connect with the first end of the resistance R16.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920045053.3U CN209372979U (en) | 2019-01-11 | 2019-01-11 | A kind of three-phase alternating current phase sequence testing circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920045053.3U CN209372979U (en) | 2019-01-11 | 2019-01-11 | A kind of three-phase alternating current phase sequence testing circuit |
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| CN209372979U true CN209372979U (en) | 2019-09-10 |
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| CN201920045053.3U Active CN209372979U (en) | 2019-01-11 | 2019-01-11 | A kind of three-phase alternating current phase sequence testing circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111707881A (en) * | 2020-07-10 | 2020-09-25 | 陕西航空电气有限责任公司 | Three-phase alternating current power supply sequence identification method and device |
| CN114325137A (en) * | 2021-12-30 | 2022-04-12 | 深圳市汇川技术股份有限公司 | Three-phase alternating current phase sequence detection circuit and system |
-
2019
- 2019-01-11 CN CN201920045053.3U patent/CN209372979U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111707881A (en) * | 2020-07-10 | 2020-09-25 | 陕西航空电气有限责任公司 | Three-phase alternating current power supply sequence identification method and device |
| CN111707881B (en) * | 2020-07-10 | 2022-08-19 | 陕西航空电气有限责任公司 | Three-phase alternating current power supply sequence identification method and device |
| CN114325137A (en) * | 2021-12-30 | 2022-04-12 | 深圳市汇川技术股份有限公司 | Three-phase alternating current phase sequence detection circuit and system |
| CN114325137B (en) * | 2021-12-30 | 2024-04-26 | 深圳市汇川技术股份有限公司 | Three-phase alternating current phase sequence detection circuit and system |
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