CN214750509U - Resonant current detection circuit - Google Patents
Resonant current detection circuit Download PDFInfo
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- CN214750509U CN214750509U CN202020608660.9U CN202020608660U CN214750509U CN 214750509 U CN214750509 U CN 214750509U CN 202020608660 U CN202020608660 U CN 202020608660U CN 214750509 U CN214750509 U CN 214750509U
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- operational amplifier
- current
- resistor
- triode
- current detection
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Abstract
The utility model discloses a resonance current detection circuit, including current transformer J1, operational amplifier U1, diode D1 and triode Q1, current transformer J1 gathers current signal back one end connecting resistance R2 and operational amplifier U1's foot 5, other end connecting resistance R2's the other end and ground, electric capacity E1, resistance R3 and triode Q1's projecting pole is connected to operational amplifier U1's foot 4, operational amplifier U1's foot 3 connecting resistance R1, resistance R5, triode Q1's collecting electrode, electric capacity E2 and 12V direct current, operational amplifier U1's foot 2 connects diode D1's positive pole and resistance R1's the other end. The utility model discloses resonance current detection circuitry adopts current transformer to carry out current signal's collection to utilize operational amplifier and triode to constitute follower circuit, ensure signal transmission's stability, utilize electric capacity filtering to increase interference immunity simultaneously, stable performance, simple structure.
Description
Technical Field
The utility model relates to a detect technical field, specifically a resonance current detection circuitry.
Background
Nowadays, the current detection technology is perfected under the push of industrial development. However, the traditional scheme is not available, and the traditional scheme is used for a while under different application environments. Current sensing is then typically used to perform two basic functions of measuring "how large" the current is and of action determination when the current is "too large".
The detection resistor is the simplest current measurement method and can be used for measuring alternating current and direct current. The biggest defect of current measurement by using the method is that a resistor is connected into a loop to be measured, so that the electric energy consumption is caused, and therefore, a current transformer is adopted for current detection.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a resonance current detection circuit to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a resonant current detection circuit comprises a current transformer J1, an operational amplifier U1, a diode D1 and a triode Q1, wherein one end of the current transformer J1 is connected with a resistor R2 and a pin 5 of the operational amplifier U1 after current signals are collected, the other end of the current transformer J1 is connected with the other end of a resistor R2 and the ground, a pin 4 of the operational amplifier U1 is connected with a capacitor E1, a resistor R3 and an emitter of a triode Q1, a pin 3 of the operational amplifier U1 is connected with a resistor R1, a resistor R5, a collector of the triode Q1, a capacitor E2 and 12V direct current, a pin 2 of the operational amplifier U1 is connected with an anode of the diode D1 and the other end of a resistor R1, the other end of the resistor R3 is connected with a resistor R4 and a current detection end PA0, and the other end of the resistor R5 is connected with the other end of the resistor R6 and the voltage detection end PA 1.
As a further technical solution of the present invention: the model of the diode D1 is 1N 4148.
As a further technical solution of the present invention: the model of the triode Q1 is 9013.
As a further technical solution of the present invention: the current detection terminal PA0 is connected with an ammeter or a controller.
As a further technical solution of the present invention: the voltage detection terminal PA1 is connected with a voltmeter or a controller.
As a further technical solution of the present invention: the model of the operational amplifier U1 is LM 339.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses resonance current detection circuitry adopts current transformer to carry out current signal's collection to utilize operational amplifier and triode to constitute follower circuit, ensure signal transmission's stability, utilize electric capacity filtering to increase interference immunity simultaneously, stable performance, simple structure.
Drawings
Fig. 1 is a circuit diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.
Referring to fig. 1, a resonant current detection circuit includes a current transformer J1, an operational amplifier U1, a diode D1, and a transistor Q1, where after a current signal is collected by the current transformer J1, one end of the current transformer J1 is connected to a resistor R2 and a pin 5 of an operational amplifier U1, the other end of the current transformer J1 is connected to the other end of the resistor R2 and ground, a pin 4 of the operational amplifier U1 is connected to a capacitor E1, a resistor R3 and an emitter of the transistor Q1, a pin 3 of the operational amplifier U1 is connected to a resistor R1, a resistor R5, a collector of the transistor Q1, a capacitor E2 and 12V dc power, a pin 2 of the operational amplifier U1 is connected to an anode of the diode D1 and the other end of the resistor R1, the other end of the resistor R3 is connected to a resistor R4 and a current detection terminal PA0, and the other end of the resistor R5 is connected to the other end of the resistor R6 and the voltage detection terminal PA 1.
The resonant current is sampled back through a current transformer J1, is converted into voltage through R2, is input into a following circuit consisting of an operational amplifier U1 and a triode Q1, and is filtered into a direct current signal through E1, because the charging and discharging time of R3, R4 and E1 is long, and the frequency of the signal is high, the voltage of E1 is approximate to direct current, reflects the peak value of the current input signal, is subjected to voltage division through R3 and R4 and then is sent into an ammeter, a singlechip or other processors to serve as an A/D input value so as to judge the current resonant current peak value, and the voltage PA2 obtained after voltage division through the resistor R5 and the resistor R6 can also serve as a state detection signal of a power supply and can be detected by an external voltmeter or a controller.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A resonant current detection circuit comprises a current transformer J1, an operational amplifier U1, a diode D1 and a triode Q1, and is characterized in that after the current transformer J1 collects a current signal, one end of the current transformer J1 is connected with a resistor R2 and a pin 5 of the operational amplifier U1, the other end of the current transformer J1 is connected with the other end of a resistor R2 and the ground, a pin 4 of the operational amplifier U1 is connected with a capacitor E1, a resistor R3 and an emitter of the triode Q1, a pin 3 of the operational amplifier U1 is connected with a resistor R1, a resistor R5, a collector of the triode Q1, a capacitor E2 and 12V direct current, a pin 2 of the operational amplifier U1 is connected with an anode of the diode D1 and the other end of a resistor R1, the other end of the resistor R3 is connected with a resistor R4 and a current detection end PA0, and the other end of the resistor R5 is connected with the other end of the resistor R6 and a voltage detection end PA 1.
2. The resonant current sensing circuit of claim 1, wherein said diode D1 is of the type 1N 4148.
3. The resonant current sensing circuit of claim 1, wherein said transistor Q1 is of type 9013.
4. The resonant current detection circuit according to claim 1, wherein the current detection terminal PA0 is connected to a current meter or a controller.
5. The resonant current detection circuit according to claim 4, wherein the voltage detection terminal PA1 is connected to a voltmeter or a controller.
6. The resonant current detection circuit of claim 4, wherein the operational amplifier U1 is of type LM 339.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020608660.9U CN214750509U (en) | 2020-04-22 | 2020-04-22 | Resonant current detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020608660.9U CN214750509U (en) | 2020-04-22 | 2020-04-22 | Resonant current detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214750509U true CN214750509U (en) | 2021-11-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020608660.9U Active CN214750509U (en) | 2020-04-22 | 2020-04-22 | Resonant current detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214750509U (en) |
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2020
- 2020-04-22 CN CN202020608660.9U patent/CN214750509U/en active Active
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