CN211148774U - Novel alternating current zero detection circuit - Google Patents
Novel alternating current zero detection circuit Download PDFInfo
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- CN211148774U CN211148774U CN201921049978.1U CN201921049978U CN211148774U CN 211148774 U CN211148774 U CN 211148774U CN 201921049978 U CN201921049978 U CN 201921049978U CN 211148774 U CN211148774 U CN 211148774U
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Abstract
The utility model relates to a novel alternating current zero point detection circuit, the alternating current power supply live wire is connected with the first input wire of first photoelectric coupler through first resistance and second resistance, the second input and the alternating current power supply zero line wire of first photoelectric coupler are connected, the alternating current power supply live wire is connected with the second input wire of second photoelectric coupler through first resistance and second resistance, the first input and the alternating current power supply zero line wire of second photoelectric coupler are connected, the first output of first photoelectric coupler passes through third resistance connection DC power supply, second output ground connection, the first output of second photoelectric coupler passes through third resistance connection DC power supply, second output ground connection, output pulse signal still passes through electric capacity ground connection after first output of first photoelectric coupler and the first output of second photoelectric coupler are parallelly connected. The method has the advantages of no need of complex circuits, low cost, good detection effect, closer generated trigger pulse signals to ideal signals, more standard shape and narrower pulse width.
Description
Technical Field
The utility model relates to an exchange zero passage collection technical field, especially relate to a novel exchange zero point detection circuit.
Background
In the increasingly widespread instruments and equipment of present day, the alternating current equipment that applies to is increasing, and also the needs that more and more carry out certain control regulation to it, wherein use very extensive control method to be applied is the control of thyristor, and wherein the prerequisite is to gather the zero crossing point of alternating current signal earlier to produce the trigger pulse signal rather than synchronous, so as to be used for carrying out synchronous triggering. Therefore, the acquisition of the zero crossing point becomes more important and very critical.
The existing commonly used zero-crossing detection circuit uses a rectifier bridge and is matched with an optical coupler, the circuit is simple, but the generated synchronous pulse signal has wider pulse width and nonideal shape, and has no problem in the use of a control circuit with low requirements, but the adjustable range can be reduced. For some applications, there are constraints that do not achieve the desired end result well, or that control accuracy and range are sacrificed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses problem to prior art existence with not enough, provide a novel exchange detection circuit at zero point.
The utility model discloses a solve above-mentioned technical problem through following technical scheme:
the utility model provides a novel alternating current zero point detection circuit, its characteristics lie in, it includes alternating current power supply, first resistance, second resistance, integrated form opto-coupler module, electric capacity and third resistance, integrated form opto-coupler module includes first photoelectric coupler and second photoelectric coupler.
The live wire of the alternating current power supply is connected with the first input end lead of the first photoelectric coupler through the first resistor and the second resistor, the second input end of the first photoelectric coupler is connected with a zero line lead of an alternating current power supply, a live wire of the alternating current power supply is connected with a second input end lead of the second photoelectric coupler through a first resistor and a second resistor, the first input end of the second photoelectric coupler is connected with a zero line lead of an alternating current power supply, the first output end of the first photoelectric coupler is connected with the direct current power supply through a third resistor, the second output end of the first photoelectric coupler is grounded, the first output end of the second photoelectric coupler is connected with a direct current power supply through a third resistor, the second output end is grounded, and the first output end of the first photoelectric coupler and the first output end of the second photoelectric coupler are connected in parallel, then are grounded through a capacitor, and are connected in parallel, and then further output a trigger pulse signal.
Preferably, the integrated optical coupling module is of a type T L P512.
On the basis of the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention.
The utility model discloses an actively advance the effect and lie in:
the utility model discloses a modified exchanges detection circuitry at zero point does not need complicated circuit, does not have original detection circuitry at zero point commonly used with high costs even, but has realized the detection effect at zero point well, and the trigger pulse signal that generates is more close to the ideal signal, and the shape is more standard, and the pulsewidth is narrower.
Drawings
Fig. 1 is a schematic circuit diagram of a novel ac zero detection circuit according to a preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the present embodiment provides a novel ac zero detection circuit, which includes an ac power supply, a first resistor R14, a second resistor R16, an integrated optical coupling module U8, a capacitor C6, and a third resistor R15, where the integrated optical coupling module U8 includes a first photocoupler and a second photocoupler, and the integrated optical coupling module U8 employs T L P512.
Alternating current power supply's live wire L is connected with the first input end wire of first optoelectronic coupler through first resistance R14 and second resistance R16, the second input end of first optoelectronic coupler is connected with alternating current power supply's zero line N wire, alternating current power supply's live wire L is connected with the second input end wire of second optoelectronic coupler through first resistance R14 and second resistance R16, the first input end of second optoelectronic coupler is connected with alternating current power supply's zero line N wire, the first output end of first optoelectronic coupler is connected +5V DC power supply, second output ground through third resistance R15, the first output end of second optoelectronic coupler is connected +5V DC power supply, second output ground through third resistance R15, the first output end of first optoelectronic coupler and the first output end of second optoelectronic coupler still output trigger pulse signal AC INT after connecting in parallel through electric capacity C6 ground after being parallelly connected.
In the embodiment, alternating current is directly used, two resistors are connected in series to carry out appropriate voltage reduction, then two paths are connected in parallel and are respectively connected to the input ends of the two optocouplers, the output ends of the two optocouplers are connected in parallel, the two optocouplers are converted into required level voltage, and the generated trigger pulse signal is the required trigger pulse signal. The circuit is simple in structure and better in signal generation.
The embodiment does not need a complex circuit, even the cost of the original common zero detection circuit is not high, but the zero detection effect is well realized, the generated trigger pulse signal is closer to an ideal signal, the shape is more standard, and the pulse width is narrower.
Although particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are examples only and that the scope of the present invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (2)
1. A novel alternating current zero point detection circuit is characterized by comprising an alternating current power supply, a first resistor, a second resistor, an integrated optical coupler module, a capacitor and a third resistor, wherein the integrated optical coupler module comprises a first photoelectric coupler and a second photoelectric coupler;
the live wire of the alternating current power supply is connected with the first input end lead of the first photoelectric coupler through the first resistor and the second resistor, the second input end of the first photoelectric coupler is connected with a zero line lead of an alternating current power supply, a live wire of the alternating current power supply is connected with a second input end lead of the second photoelectric coupler through a first resistor and a second resistor, the first input end of the second photoelectric coupler is connected with a zero line lead of an alternating current power supply, the first output end of the first photoelectric coupler is connected with the direct current power supply through a third resistor, the second output end of the first photoelectric coupler is grounded, the first output end of the second photoelectric coupler is connected with a direct current power supply through a third resistor, the second output end is grounded, and the first output end of the first photoelectric coupler and the first output end of the second photoelectric coupler are connected in parallel, then are grounded through a capacitor, and are connected in parallel, and then further output a trigger pulse signal.
2. The novel AC zero detection circuit as claimed in claim 1, wherein said integrated optical coupling module employs T L P512.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921049978.1U CN211148774U (en) | 2019-07-04 | 2019-07-04 | Novel alternating current zero detection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921049978.1U CN211148774U (en) | 2019-07-04 | 2019-07-04 | Novel alternating current zero detection circuit |
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| CN211148774U true CN211148774U (en) | 2020-07-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116014730A (en) * | 2023-03-17 | 2023-04-25 | 国网山东省电力公司青州市供电公司 | Flexible load regulation and control device, system and regulation and control method |
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2019
- 2019-07-04 CN CN201921049978.1U patent/CN211148774U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116014730A (en) * | 2023-03-17 | 2023-04-25 | 国网山东省电力公司青州市供电公司 | Flexible load regulation and control device, system and regulation and control method |
| CN116014730B (en) * | 2023-03-17 | 2023-11-24 | 国网山东省电力公司青州市供电公司 | Flexible load regulation and control device, system and regulation and control method |
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