CN203037751U - Three-phase alternating current phase sequence detection circuit - Google Patents
Three-phase alternating current phase sequence detection circuit Download PDFInfo
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- CN203037751U CN203037751U CN 201220746521 CN201220746521U CN203037751U CN 203037751 U CN203037751 U CN 203037751U CN 201220746521 CN201220746521 CN 201220746521 CN 201220746521 U CN201220746521 U CN 201220746521U CN 203037751 U CN203037751 U CN 203037751U
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- alternating current
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- diode
- backflow diode
- light emitting
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Abstract
The utility model relates to the power electronics and aims at providing a three-phase alternating current phase sequence detection circuit. The circuit comprises three sub circuits which are connected with three phase lines of a detected alternating current respectively. The each sub circuit comprises an access resistor which is connected with a one phase line of the detected alternating current. The access resistor is connected with a backflow diode. A cathode of the backflow diode is connected with the access resistor. Two ends of the backflow diode are connected in parallel with light emitting diodes. An anode of the backflow diode is connected with the cathode of the light emitting diode. The light emitting diodes form induction connection with light-sensation variable resistance components. One end of the each light-sensation variable resistance component is grounded. The other end of the each light-sensation variable resistance component is connected with a test voltage source through connecting a pull-up resistor. The anodes of the backflow diodes in the three sub circuits are connected through leads. By using the technical scheme, voltage values of connection ends of the light-sensation variable resistance components and the pull-up resistors in the three sub circuits are tracked so that the three-phase alternating current phase sequence of the each sub circuit can be analyzed.
Description
Technical field
The utility model relates to power electronics, refers to a kind of three-phase alternating current phase sequence testing circuit especially.
Background technology
Electric operator is on-the-spot to use flow process to be installation, wiring, energising debugging, commencement of commercial operation.If topworks can not identify the alternating current phase sequence automatically, and just in time use on the contrary with product as wiring, then need cut off the power supply, rewiring again, this make troubles for on-the-spot the use.More seriously in use as unexpected phase shortage, then very easily cause the damage of topworks.At present, most of electric operators of three-phase alternating current power supply can't be identified the alternating current phase sequence automatically on the market, and some product can be realized this function, but cost is higher, as adopting special integrated chip TC783A, it can realize this function, but because of the versatility of chip design, therefore other all multi-functional being left unused that it also has adopts this scheme cost higher.
The utility model content
The utility model proposes a kind of three-phase alternating current phase sequence testing circuit, it can carry out phase sequence to three-phase alternating current and detect.
The technical solution of the utility model is achieved in that a kind of three-phase alternating current phase sequence testing circuit, it comprises three electronic circuits that are connected with tested alternating current three-phase line respectively, described each electronic circuit comprises the access resistance that is connected with a phase circuit of described tested alternating current, described access resistance is connected with the backflow diode, the negative pole of described backflow diode is connected with access resistance, two ends at described backflow diode are parallel with light emitting diode, the positive pole of this backflow diode is connected with the negative pole of described light emitting diode, described light emitting diode induction is connected with the light sensation resistance change element, one end ground connection of described light sensation resistance change element, the other end of this light sensation resistance change element is connected with the test voltage source by connecting pull-up resistor, and the positive interpolar lead of the backflow diode in described three electronic circuits connects.
Pass through the technical program, the negative pole end voltage of the backflow diode of arbitrary electronic circuit is lower than other two-way in three electronic circuits, because the positive interpolar lead of the backflow diode in each electronic circuit connects, so light emitting diode conducting in higher two electronic circuits of magnitude of voltage, the variation of the correspondingly light sensation resistance change element change in resistance of light emitting diode photoinduction connection, and then the magnitude of voltage at light sensation resistance change element and pull-up resistor link place.Backflow diode in the minimum electronic circuit of current direction voltage this moment.Pass through the tracking to the magnitude of voltage at light sensation resistance change element in three electronic circuits and pull-up resistor link place thus, can analyze the phase order of 3-phase AC at each electronic circuit place.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structure connection layout of the utility model three-phase alternating current phase sequence testing circuit;
The signal waveforms of Fig. 2 for detecting under the utility model normal condition;
The signal waveforms of Fig. 3 for detecting under the utility model abnormal conditions.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
A kind of three-phase alternating current phase sequence testing circuit, it comprises three electronic circuits that are connected with tested alternating current three-phase line respectively.Described each electronic circuit comprises the access resistance that is connected with a phase circuit of described tested alternating current, and described access resistance is connected with the backflow diode, and the negative pole of described backflow diode is connected with access resistance.Two ends at described backflow diode are parallel with light emitting diode, and the positive pole of this backflow diode is connected with the negative pole of described light emitting diode.Described light emitting diode induction is connected with the light sensation resistance change element, one end ground connection of described light sensation resistance change element, the other end of this light sensation resistance change element is connected with the test voltage source by connecting pull-up resistor, and the positive interpolar lead of the backflow diode in described three electronic circuits connects.
Pass through such scheme, the negative pole end voltage of the backflow diode of arbitrary electronic circuit is lower than other two-way in three electronic circuits, because the positive interpolar lead of the backflow diode in each electronic circuit connects, so light emitting diode conducting in higher two electronic circuits of magnitude of voltage, the variation of the correspondingly light sensation resistance change element change in resistance of light emitting diode photoinduction connection, and then the magnitude of voltage at light sensation resistance change element and pull-up resistor link place.Backflow diode in the minimum electronic circuit of current direction voltage this moment.Pass through the tracking to the magnitude of voltage at light sensation resistance change element in three electronic circuits and pull-up resistor link place thus, can analyze the phase order of 3-phase AC at each electronic circuit place.
Concrete, as shown in Figure 1, three electronic circuits insert resistance R 3 and are connected with tested alternating current A, B, C three-phase line by the first access resistance R 1, the second access resistance R 2, the 3rd respectively, D1 ~ D3 is followed successively by first, second, and third backflow diode, D4 ~ D5 is followed successively by first, second, and third light emitting diode, U1 ~ U3 is followed successively by first, second, and third light sensation resistance change element, R4 ~ R6 is followed successively by first, second, and third pull-up resistor, VCC is the test voltage source, and output terminal INTA, INTB, INTC be the link of corresponding U1 ~ U3 and pull-up resistor successively.Be example mutually with A, be lower than B and C phase as the A phase voltage, then the B phase current can pass through R2, D5, D1, R1 flow into the A phase, and the C phase current can pass through R3, D6, D1, R1 inflow A phase.When D5 and D6 conducting are luminous, can make U2, U3 resistance change, corresponding INTB, INTC are the output relevant voltage.
For avoiding the trickle fluctuation of tested alternating current to cause test unusual, the forward conduction voltage of described backflow diode can be made as 1.5V.
Further, described light sensation resistance change element can be photoresistance, also can be photodiode.U1 ~ U3 shown in Figure 1 is photodiode.
The utility model is during for detection of control system for electric actuating mechanism, sequential value by INTA, INTB, INTC, can learn the three-phase electricity order of current electric operator wiring, pass through governor circuit again, functional requirement control output circuit by topworks has finally reached the effect that the three-phase electricity phase sequence detects and proofreaies and correct automatically.
Suppose that the three-phase electricity phase sequence is U in the electrical network〉V〉W, A, B, C corresponding U, V, W respectively connect, and draw the signal waveform of electric operator inner A, B, C end and INTA, INTB, INTC according to the three-phase electricity principle, as shown in Figure 2.At the negative edge of INTA signal, INTB is high level, and INTC is low level.If the terminal block mistake is connected B with W, C is connected with V, then oscillogram as shown in Figure 3, at the negative edge of INTA signal, INTB is low level, INTC is high level.Other exchanges connection in like manner in twos in the three-phase.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (4)
1. three-phase alternating current phase sequence testing circuit, it is characterized in that: it comprises three electronic circuits that are connected with tested alternating current three-phase line respectively, described each electronic circuit comprises the access resistance that is connected with a phase circuit of described tested alternating current, described access resistance is connected with the backflow diode, the negative pole of described backflow diode is connected with access resistance, two ends at described backflow diode are parallel with light emitting diode, the positive pole of this backflow diode is connected with the negative pole of described light emitting diode, described light emitting diode induction is connected with the light sensation resistance change element, one end ground connection of described light sensation resistance change element, the other end of this light sensation resistance change element is connected with the test voltage source by connecting pull-up resistor, and the positive interpolar lead of the backflow diode in described three electronic circuits connects.
2. three-phase alternating current phase sequence testing circuit according to claim 1, it is characterized in that: the forward conduction voltage of described backflow diode is 1.5V.
3. three-phase alternating current phase sequence testing circuit according to claim 1, it is characterized in that: described light sensation resistance change element is photoresistance.
4. three-phase alternating current phase sequence testing circuit according to claim 1, it is characterized in that: described light sensation resistance change element is photodiode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220746521 CN203037751U (en) | 2012-12-29 | 2012-12-29 | Three-phase alternating current phase sequence detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220746521 CN203037751U (en) | 2012-12-29 | 2012-12-29 | Three-phase alternating current phase sequence detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203037751U true CN203037751U (en) | 2013-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220746521 Expired - Fee Related CN203037751U (en) | 2012-12-29 | 2012-12-29 | Three-phase alternating current phase sequence detection circuit |
Country Status (1)
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| CN (1) | CN203037751U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706960A (en) * | 2020-06-28 | 2020-09-25 | 深圳麦克维尔空调有限公司 | Fault detection circuit for air conditioner compressor |
-
2012
- 2012-12-29 CN CN 201220746521 patent/CN203037751U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706960A (en) * | 2020-06-28 | 2020-09-25 | 深圳麦克维尔空调有限公司 | Fault detection circuit for air conditioner compressor |
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Legal Events
| 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 |
Granted publication date: 20130703 Termination date: 20161229 |
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| CF01 | Termination of patent right due to non-payment of annual fee |