CN207992303U - A kind of voltage frequency converter voltage detection circuit - Google Patents
A kind of voltage frequency converter voltage detection circuit Download PDFInfo
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- CN207992303U CN207992303U CN201720641266.3U CN201720641266U CN207992303U CN 207992303 U CN207992303 U CN 207992303U CN 201720641266 U CN201720641266 U CN 201720641266U CN 207992303 U CN207992303 U CN 207992303U
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Abstract
The utility model discloses a kind of voltage frequency converter voltage detection circuits, including power circuit, voltage collection circuit, optical coupling isolation circuit and signaling conversion circuit, the power circuit includes capacitance C3, diode D1, transformer winding N1 and chip U1, the voltage collection circuit includes resistance R1, resistance R2, resistance R3 and resistance R5, the optical coupling isolation circuit includes chip U2, capacitance C1 and capacitance C5, and signaling conversion circuit includes chip U3, potentiometer RP1, resistance R9 and resistance R10.The utility model voltage frequency converter voltage detection circuit is detected the output voltage of frequency converter using light-coupled isolation technology, and signal processing is carried out to detectable voltage signals, final output steady dc voltage signal, it can intuitively be read by gauge outfit, microcontroller can also be connected, carries out relevant control, while oscillograph can also be connected, data sampling analysis is carried out, has the advantages that easy to use and accuracy of detection is high.
Description
Technical field
The utility model is related to a kind of detection circuit, specifically a kind of voltage frequency converter voltage detection circuit.
Background technology
Voltage detecting circuit is an important component in frequency converter failure detection circuit, it is intended to which guarantee makes IGBT
The working power voltage of inverter circuit is within a particular safety range, if it (includes power supply itself that working power, which jeopardizes IGBT,
Storage, which is powered, to be held) device it is safe when, implement fault alarm, so that braking circuit is devoted oneself to work, the measures such as stoppage protection.In addition, few
Number type also has the detection to output voltage to play the same purpose to IGBT conduction pipe voltage drop detections to a certain extent, take
For the tube voltage drop detection circuit of IGBT in driving circuit.
Utility model content
The purpose of this utility model is to provide a kind of voltage frequency converter voltage detection circuits, to solve to carry in above-mentioned background technology
The problem of going out.
To achieve the above object, the utility model provides the following technical solutions：
A kind of voltage frequency converter voltage detection circuit, including power circuit, voltage collection circuit, optical coupling isolation circuit and signal turn
Circuit is changed, the power circuit includes capacitance C3, diode D1, transformer winding N1 and chip U1, the voltage collection circuit
Including resistance R1, resistance R2, resistance R3 and resistance R5, the optical coupling isolation circuit includes chip U2, capacitance C1 and capacitance C5, letter
Number conversion circuit includes chip U3, potentiometer RP1, resistance R9 and resistance R10；
One end of the transformer winding N1 is grounded, and the other end connects the anode of diode D1, and the cathode of diode D1 connects
The pin 8 of capacitance C3, capacitance C4 and chip U1 are connect, the pin 6 of chip U1 connects the other end of the pin 7 of chip U1, capacitance C3
With the other end of capacitance C4, the pin 1 of chip U1 connects the pin 1 of capacitance C2 and chip U1, and the pin 2 of chip U1 connects capacitance
Change is connected after other end connection resistance R3, the resistance R1 and resistance R5, resistance R3 of C1 and resistance R4, resistance R4 and resistance R2 series connection
The pin 7 that frequency device test point P, resistance R1 connect frequency converter test point N, chip U2 with the other end after resistance R5 parallel connections connects electricity
Hinder R6, the other end connection resistance R8 of resistance R6, the pin 3 of capacitance C6 and chip U3, the 6 resistance R7 of pin of chip U2, resistance
It is grounded after R8 and capacitance C6 parallel connections, pin 2, capacitance C7 and the resistance R9 of the other end connection connection chip U3 of resistance R7, chip
The pin 1 of U3 connects the other end, the other end of resistance R9 and a fixing end of potentiometer RP1 of capacitance C7, potentiometer RP1's
Another fixing end is grounded after connecting with resistance R10, the sliding end connection signal output end VPN of potentiometer RP1.
Preferred embodiment as the utility model：The model 78L05C of the chip U1.
Preferred embodiment as the utility model：The model A7840 of the chip U2.
Preferred embodiment as the utility model：The model LF353 of the chip U3.
Preferred embodiment as the utility model：The transformer winding N1 is the secondary end winding of AC transformer.
Preferred embodiment as the utility model：The signal output end VPN connections voltmeter, microcontroller or oscillograph.
Compared with prior art, the utility model has the beneficial effects that：The utility model voltage frequency converter voltage detection circuit is adopted
The output voltage of frequency converter is detected with optocoupler isolation technology, and signal processing is carried out to detectable voltage signals, it is final defeated
Go out steady dc voltage signal, can intuitively be read by gauge outfit, microcontroller can also be connected, carries out related control
System, while oscillograph can also be connected, data sampling analysis is carried out, has the advantages that easy to use and accuracy of detection is high.
Description of the drawings
Fig. 1 is the circuit diagram of voltage frequency converter voltage detection circuit.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Referring to Fig. 1, in the utility model embodiment, a kind of voltage frequency converter voltage detection circuit, including power circuit, voltage
Acquisition Circuit, optical coupling isolation circuit and signaling conversion circuit, the power circuit include capacitance C3, diode D1, transformer around
Group N1 and chip U1, the voltage collection circuit include resistance R1, resistance R2, resistance R3 and resistance R5, the light-coupled isolation electricity
Road includes chip U2, capacitance C1 and capacitance C5, and signaling conversion circuit includes chip U3, potentiometer RP1, resistance R9 and resistance R10；
One end of the transformer winding N1 is grounded, and the other end connects the anode of diode D1, and the cathode of diode D1 connects
The pin 8 of capacitance C3, capacitance C4 and chip U1 are connect, the pin 6 of chip U1 connects the other end of the pin 7 of chip U1, capacitance C3
With the other end of capacitance C4, the pin 1 of chip U1 connects the pin 1 of capacitance C2 and chip U1, and the pin 2 of chip U1 connects capacitance
Change is connected after other end connection resistance R3, the resistance R1 and resistance R5, resistance R3 of C1 and resistance R4, resistance R4 and resistance R2 series connection
The pin 7 that frequency device test point P, resistance R1 connect frequency converter test point N, chip U2 with the other end after resistance R5 parallel connections connects electricity
Hinder R6, the other end connection resistance R8 of resistance R6, the pin 3 of capacitance C6 and chip U3, the 6 resistance R7 of pin of chip U2, resistance
It is grounded after R8 and capacitance C6 parallel connections, pin 2, capacitance C7 and the resistance R9 of the other end connection connection chip U3 of resistance R7, chip
The pin 1 of U3 connects the other end, the other end of resistance R9 and a fixing end of potentiometer RP1 of capacitance C7, potentiometer RP1's
Another fixing end is grounded after connecting with resistance R10, the sliding end connection signal output end VPN of potentiometer RP1.
The model 78L05C of chip U1.The model A7840 of chip U2.The model LF353 of chip U3.Transformer around
Group N1 is the secondary end winding of AC transformer.Signal output end VPN connections voltmeter, microcontroller or oscillograph.
The operation principle of the utility model is：U2 is linear optocoupler in circuit, and input side is powered by switch transformation
The alternating voltage that the independent winding N1 of device is provided obtains 5V electricity through diode D1 rectifying and wave-filterings, by 78L05 voltage stabilizing chip U1 processing
Source is provided, power supply ground terminal and the same current potential of main circuit N-terminal.Outlet side is powered, then is provided by mainboard+5V.
The voltage output end of DC loop P, N-terminal connection frequency converter, voltage directly through partial pressure, obtain about certain numerical value
Voltage division signal, after input photo-coupler U2 carries out light, electric isolution and Linear Amplifer, in the detection voltage that output end is exaggerated
Signal, then be further amplified by LF353 subtracting amplifiers, it forms VPN DC voltages and detects signal, through output interface VPN connections
Different equipment is connected to voltmeter, microcontroller or oscillograph, or according to specific implementation situation.
The utility model voltage frequency converter voltage detection circuit examines the output voltage of frequency converter using light-coupled isolation technology
It surveys, and signal processing is carried out to detectable voltage signals, final output steady dc voltage signal can be carried out straight by gauge outfit
The reading of sight can also connect microcontroller, carry out relevant control, while can also connect oscillograph, carry out data sampling analysis, tool
Have the advantages that easy to use and accuracy of detection is high.
Claims (6)
1. a kind of voltage frequency converter voltage detection circuit, including power circuit, voltage collection circuit, optical coupling isolation circuit and signal conversion
Circuit, which is characterized in that the power circuit includes capacitance C3, diode D1, transformer winding N1 and chip U1, the voltage
Acquisition Circuit includes resistance R1, resistance R2, resistance R3 and resistance R5, the optical coupling isolation circuit include chip U2, capacitance C1 and
Capacitance C5, signaling conversion circuit include chip U3, potentiometer RP1, resistance R9 and resistance R10；
One end of the transformer winding N1 is grounded, and the other end connects the anode of diode D1, the cathode connection electricity of diode D1
Hold the pin 8 of C3, capacitance C4 and chip U1, the pin 6 of chip U1 connects the other end and electricity of the pin 7 of chip U1, capacitance C3
Hold the other end of C4, the pin 1 of chip U1 connects the pin 1 of capacitance C2 and chip U1, the pin 2 of chip U1 connect capacitance C1 and
Frequency converter is connected after other end connection resistance R3, the resistance R1 and resistance R5, resistance R3 of resistance R4, resistance R4 and resistance R2 series connection
The pin 7 that test point P, resistance R1 connect frequency converter test point N, chip U2 with the other end after resistance R5 parallel connections connects resistance
The other end connection resistance R8 of R6, resistance R6, the pin 3 of capacitance C6 and chip U3, the pin 6 resistance R7, resistance R8 of chip U2
It is grounded with after capacitance C6 parallel connections, pin 2, capacitance C7 and the resistance R9 of the other end connection connection chip U3 of resistance R7, chip U3
Pin 1 connect the other end, the other end of resistance R9 and a fixing end of potentiometer RP1 of capacitance C7, potentiometer RP1's is another
One fixing end is grounded after connecting with resistance R10, the sliding end connection signal output end VPN of potentiometer RP1.
2. voltage frequency converter voltage detection circuit according to claim 1, which is characterized in that the model of the chip U1
78L05C。
3. voltage frequency converter voltage detection circuit according to claim 1, which is characterized in that the model of the chip U2
A7840。
4. voltage frequency converter voltage detection circuit according to claim 1, which is characterized in that the model of the chip U3
LF353。
5. voltage frequency converter voltage detection circuit according to claim 1, which is characterized in that the transformer winding N1 is exchange
The secondary end winding of transformer.
6. voltage frequency converter voltage detection circuit according to claim 1, which is characterized in that the signal output end VPN connections
Voltmeter, microcontroller or oscillograph.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720641266.3U CN207992303U (en) | 2017-06-05 | 2017-06-05 | A kind of voltage frequency converter voltage detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720641266.3U CN207992303U (en) | 2017-06-05 | 2017-06-05 | A kind of voltage frequency converter voltage detection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN207992303U true CN207992303U (en) | 2018-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720641266.3U Expired - Fee Related CN207992303U (en) | 2017-06-05 | 2017-06-05 | A kind of voltage frequency converter voltage detection circuit |
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| Country | Link |
|---|---|
| CN (1) | CN207992303U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111220837A (en) * | 2018-11-26 | 2020-06-02 | 宝山钢铁股份有限公司 | Output voltage detector of broadband PWM frequency converter |
-
2017
- 2017-06-05 CN CN201720641266.3U patent/CN207992303U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111220837A (en) * | 2018-11-26 | 2020-06-02 | 宝山钢铁股份有限公司 | Output voltage detector of broadband PWM frequency converter |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181019 Termination date: 20200605 |
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| CF01 | Termination of patent right due to non-payment of annual fee |