CN217212889U - Current signal conversion device - Google Patents
Current signal conversion device Download PDFInfo
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- CN217212889U CN217212889U CN202120892076.5U CN202120892076U CN217212889U CN 217212889 U CN217212889 U CN 217212889U CN 202120892076 U CN202120892076 U CN 202120892076U CN 217212889 U CN217212889 U CN 217212889U
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Abstract
The utility model discloses a conversion equipment of electric current signal, include: the device comprises a current measuring module, a rectification conversion module and a resistance voltage dividing module. The input end of the current measuring module is connected with the power line with the three phase line input ends, the output end of the current measuring module is connected with the input end of the rectification conversion module, and the current measuring module is used for adjusting the numerical value of the current signal of the power line with the three phase line input ends to a preset numerical value; the output end of the rectification conversion module is connected with the resistance voltage division module and is used for converting the current signal with a preset numerical value into a direct-current voltage signal; and the output end of the resistance voltage division module is used for being connected with the controller and adjusting the amplitude of the direct-current voltage signal to a preset voltage amplitude so as to supply energy to the controller. The signal requirement on the subsequent control link is realized, circuit devices do not need to be replaced, and the use is convenient.
Description
Technical Field
The utility model relates to a power electronic technology field, concretely relates to conversion equipment of electric current signal.
Background
In the field of power electronics and control, a Current Transformer (CT) is often used to measure an alternating Current three-phase Current value, the secondary output of the CT is generally 1A or 5A, and Current measurement results often need to be processed for subsequent control links to realize certain control functions. In general, different current signal conversion circuits are required to be adopted for different secondary outputs of the CT, and the problem of inconvenient use due to the need to replace circuit devices exists.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming and need changing the circuit device, awkward defect to a conversion equipment of electric current signal is provided.
In order to achieve the above purpose, the utility model provides a following technical scheme:
an embodiment of the utility model provides a conversion equipment of electric current signal, include: a current measuring module, a rectifying and converting module and a resistance voltage dividing module, wherein,
the input end of the current measuring module is connected with the three-phase input end power line, and the output end of the current measuring module is connected with the input end of the rectification conversion module and is used for adjusting the value of the current signal of the three-phase input end power line to a preset value;
the output end of the rectification conversion module is connected with the resistance voltage division module and is used for converting a current signal with a preset numerical value into a direct-current voltage signal;
and the output end of the resistance voltage division module is connected with the controller and used for adjusting the amplitude of the direct-current voltage signal to a preset voltage amplitude so as to supply energy to the controller.
Optionally, the resistance voltage division module further includes: and the filtering module is used for preprocessing the direct-current voltage signal to obtain the amplitude of the direct-current voltage signal available for subsequent analysis.
Optionally, the rectifying conversion module comprises: a rectification module and a signal conversion module,
the output end of the rectification module is connected with the signal conversion module and is used for converting a current signal with a preset numerical value into a direct current signal;
and the output end of the signal conversion module is connected with the resistance voltage division module and is used for converting the direct current signal into a direct current voltage signal.
Optionally, the current measurement module comprises: a plurality of current converting units, wherein each current converting unit includes: a first switch module, a current transformer,
the current transformer includes: the output end of the rectifier conversion module is connected with the input end of the rectifier conversion module, the first input end of the rectifier conversion module is grounded, and each second input end of the rectifier conversion module is connected with one phase power circuit of the three phase line input end power circuits through the first switch module.
Optionally, the resistance voltage dividing module includes: a plurality of resistance voltage-dividing units, wherein each resistance voltage-dividing unit includes: a first resistor, a second resistor, a third resistor and a second switch module,
the first end of the first resistor is connected with the first output end of the rectification conversion module, and the second end of the first resistor is connected with the first end of the third resistor;
the first end of the second resistor is connected with the second output end of the rectification conversion module, and the second end of the second resistor is connected with the second end of the third resistor;
and the third end and the fourth end of the third resistor are connected with the controller through a second switch module.
Optionally, the three-phase input terminal comprises a current signal of the power line: three-phase alternating current signals, single-phase alternating current signals.
The utility model discloses technical scheme has following advantage:
the utility model provides a pair of conversion equipment of electric current signal, include: the device comprises a current measuring module, a rectification conversion module and a resistance voltage division module. The input end of the current measuring module is used for being connected with the three phase line input end power circuit, and the output end of the current measuring module is connected with the input end of the rectification conversion module and used for adjusting the value of the current signal of the three phase line input end power circuit to a preset value. The output end of the rectification conversion module is connected with the resistance voltage division module and used for converting the current signal with the preset value into a direct current voltage signal. The output end of the resistance voltage division module is used for being connected with the controller and adjusting the amplitude of the direct-current voltage signal to a preset voltage amplitude to supply energy to the controller. The signal requirement on the subsequent control link is realized, circuit devices do not need to be replaced, and the use is convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a composition diagram of a specific example of a current signal conversion apparatus according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a specific example of a current measurement module of a current signal conversion apparatus according to an embodiment of the present invention;
fig. 3 is a specific circuit structure diagram of a resistance voltage-dividing unit circuit of a current signal conversion device according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, 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 work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Examples
An embodiment of the utility model provides a conversion equipment of electric current signal, as shown in fig. 1, include: the device comprises a current measuring module, a rectification conversion module and a resistance voltage division module. The method is applied to converting a three-phase alternating current signal or a single-phase alternating current signal into a direct current voltage signal required by the controller.
As shown in fig. 1, the input of the current measuring module is used for connecting with the three phase input power lines. The output end of the current measuring module is connected with the input end of the rectification conversion module. The method is used for adjusting the value of the current signal of the power line at the input end of the three phase lines to a preset value.
In a particular embodiment, the current measurement module includes: the number of the current conversion units is not limited herein and is determined according to the number of phases of the power line at the phase line input end. As shown in fig. 2, for example: when there are three phase lines, the current measuring module includes three current converting units, and the three phase lines are respectively connected with the three current converting units. Each current conversion unit includes: the device comprises a first switch module and a current transformer. And adjusting the value of the current signal of the power line at the input end of the three phase lines to a preset value according to the coil turn ratio of the current transformer. The current transformer includes: the circuit comprises an output end, a first input end and a plurality of second input ends. The output end of the current transformer is connected with the input end of the rectification conversion module. The first input end of the current transformer is connected with the ground end GND. And the second input end of each current transformer is connected with one phase power circuit of the three phase line input ends through the first switch module.
The output end of the rectification conversion module is connected with the resistance voltage division module and used for converting the current signal with the preset value into a direct current voltage signal. A commutation conversion module comprising: the device comprises a rectification module and a signal conversion module. The output end of the rectification module is connected with the signal conversion module and used for converting the current signal with the preset value into a direct current signal. The rectification module is a common rectification circuit in the prior art, and is not limited herein, and a corresponding rectification circuit is selected according to actual conditions. The output end of the signal conversion module is connected with the resistance voltage division module and used for converting the direct current signal into a direct current voltage signal. Specifically, the conversion may be performed by using a resistor device, or may be performed by using other circuit devices having the same function, which is not limited herein.
The output end of the resistance voltage division module is used for being connected with the controller and adjusting the amplitude of the direct-current voltage signal to a preset voltage amplitude to supply energy to the controller. The preset voltage amplitude is determined according to actual conditions, and is not limited herein. The utility model provides a resistance voltage division module still includes: and the filtering module is used for preprocessing the direct-current voltage signal to obtain the amplitude of the direct-current voltage signal available for subsequent analysis.
In one embodiment, the resistance voltage divider module includes: a plurality of resistance voltage-dividing units. As shown in fig. 3, each of the resistance voltage-dividing units includes: the circuit comprises a first resistor R1, a second resistor R2, a third resistor R3 and a second switch module. The first end of the first resistor R1 is connected to the first output end of the rectification conversion module. The second end of the first resistor R1 is connected to the first end of the third resistor R3. The first end of the second resistor R2 is connected with the second output end of the rectification conversion module. The second end of the second resistor R2 is connected to the second end of the third resistor R3. The third end and the fourth end of the third resistor R3 are both connected with the controller through the second switch module.
The embodiment of the utility model provides a pair of current signal's conversion equipment, include: the device comprises a current measuring module, a rectification conversion module and a resistance voltage division module. The input end of the current measuring module is connected with the three-phase line input end power line, and the output end of the current measuring module is connected with the input end of the rectification conversion module and used for adjusting the value of the current signal of the three-phase line input end power line to a preset value; the output end of the rectification conversion module is connected with the resistance voltage division module and is used for converting the current signal with a preset numerical value into a direct-current voltage signal; and the output end of the resistance voltage division module is connected with the controller and used for adjusting the amplitude of the direct-current voltage signal to a preset voltage amplitude so as to supply energy to the controller. The signal requirement on the subsequent control link is realized, circuit devices do not need to be replaced, and the use is convenient.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.
Claims (6)
1. A device for converting a current signal, comprising: a current measuring module, a rectification conversion module and a resistance voltage dividing module, wherein,
the input end of the current measuring module is connected with the power line with the three phase line input ends, and the output end of the current measuring module is connected with the input end of the rectification conversion module and used for adjusting the value of the current signal of the power line with the three phase line input ends to a preset value;
the output end of the rectification conversion module is connected with the resistance voltage division module and is used for converting a current signal with a preset value into a direct-current voltage signal;
the output end of the resistance voltage division module is used for being connected with the controller and adjusting the amplitude of the direct-current voltage signal to a preset voltage amplitude to supply energy to the controller.
2. The apparatus for converting a current signal according to claim 1, wherein the resistance voltage-dividing module further comprises: and the filtering module is used for preprocessing the direct-current voltage signal to obtain the amplitude of the direct-current voltage signal available for subsequent analysis.
3. The current signal converting apparatus according to claim 2, wherein the rectifying conversion module comprises: a rectification module and a signal conversion module,
the output end of the rectification module is connected with the signal conversion module and used for converting a current signal with a preset value into a direct current signal;
and the output end of the signal conversion module is connected with the resistance voltage division module and is used for converting the direct current signal into a direct current voltage signal.
4. The apparatus for converting a current signal according to claim 3, wherein the current measuring module comprises: a plurality of current converting units, wherein each current converting unit includes: a first switch module, a current transformer,
the current transformer includes: the output end of the rectifier conversion module is connected with the input end of the rectifier conversion module, the first input end of the rectifier conversion module is grounded, and each second input end of the rectifier conversion module is connected with one phase power circuit of the three phase line input end power circuits through the first switch module.
5. The apparatus for converting a current signal according to claim 4, wherein the resistance voltage divider module comprises: a plurality of resistance voltage-dividing units, wherein each resistance voltage-dividing unit includes: a first resistor, a second resistor, a third resistor and a second switch module,
the first end of the first resistor is connected with the first output end of the rectification conversion module, and the second end of the first resistor is connected with the first end of the third resistor;
the first end of the second resistor is connected with the second output end of the rectification conversion module, and the second end of the second resistor is connected with the second end of the third resistor;
and the third end and the fourth end of the third resistor are respectively connected with the controller through the first section and the second section of the second switch module.
6. The apparatus for converting a current signal according to claim 5, wherein the current signal of the power line with three phase input terminals comprises: three-phase alternating current signals, single-phase alternating current signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120892076.5U CN217212889U (en) | 2021-04-27 | 2021-04-27 | Current signal conversion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120892076.5U CN217212889U (en) | 2021-04-27 | 2021-04-27 | Current signal conversion device |
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| Publication Number | Publication Date |
|---|---|
| CN217212889U true CN217212889U (en) | 2022-08-16 |
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| CN202120892076.5U Active CN217212889U (en) | 2021-04-27 | 2021-04-27 | Current signal conversion device |
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| CN (1) | CN217212889U (en) |
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2021
- 2021-04-27 CN CN202120892076.5U patent/CN217212889U/en active Active
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