CN203337717U - Voltage signal conditioning circuit for electric leakage auto-reclosing circuit breaker - Google Patents
Voltage signal conditioning circuit for electric leakage auto-reclosing circuit breaker Download PDFInfo
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- CN203337717U CN203337717U CN2013204195635U CN201320419563U CN203337717U CN 203337717 U CN203337717 U CN 203337717U CN 2013204195635 U CN2013204195635 U CN 2013204195635U CN 201320419563 U CN201320419563 U CN 201320419563U CN 203337717 U CN203337717 U CN 203337717U
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Abstract
The utility model relates to a voltage signal conditioning circuit for an electric leakage auto-reclosing circuit breaker, wherein the phase wire of the phase voltage or the wire voltage of a power supply passes through the anode of a diode D1, and the cathode of the diode D1 is connected with one end of a resistor R1. The voltage signal conditioning circuit further comprises a phase voltage-wire voltage selection circuit, a voltage feedback circuit, a diode D2, a direct-current power supply VCC, an analogue-digital converter AD1, a resistor R4, and a filter capacitor C1, wherein a zero wire or the other phase wire of the wire voltage is connected with the input end of the phase voltage-wire voltage selection circuit; one end of the voltage feedback circuit is connected with a resistor R1, and the other end of the voltage feedback circuit is connected with the phase voltage-wire voltage selection circuit; the diode D2 is connected with the voltage feedback circuit; the direct-current power supply VCC is connected with a photoelectric coupler U1a; the analogue-digital converter AD1 is connected with a photoelectric coupler U1b; one end of the resistor R4 is connected with the pin 5 of the photoelectric coupler U1b, and the other end of the resistor R4 is grounded; and one end of the filter capacitor C1 is connected with the analogue-digital converter AD1, and the other end of the filter capacitor C1 is grounded. With the adoption of the voltage signal conditioning circuit disclosed by the utility model, a temperature drift problem can be solved, linearity can be improved, and the universality of a three-phase three-wire system and a three-phase four-wire system can be realized.
Description
Technical field
The utility model relates to a kind of voltage signal conditioning circuit, more particularly, relates to a kind of electric leakage autoreclose breaker voltage signal conditioning circuit.
Background technology
Photoelectrical coupler is little with its volume, cost is low and reliable isolation, in the small-signal transfer circuit; In the electro-mechanical system of strong and weak electricity one; In being furnished with the low-voltage electrical apparatus of embedded system, play an important role; Especially fully demonstrate its simple, reliable advantage in the delivery applications of digital quantity and switching value.But, in the signal condition or transmittance process of analog quantity, because the characteristic of semiconductor of photoelectrical coupler is subject to the impact of environment temperature, can cause certain nonlinearity erron and drift and affect and measure and the protection precision.At present solution commonly used adopts temperature compensation or adopts operational amplifier to coordinate to realize non-linear correction, but general temperature compensation low precision, and what have has increased nonlinearity erron on the contrary; And adopt operational amplifier to coordinate the temperature drift that can not solve photoelectrical coupler; If adopt two kinds of compensation methodes that all take into account, not only complex circuit designs, and increase cost and reduction reliability.The existing employing in the voltage signal conditioning circuit that photoelectrical coupler is core only has a photoelectrical coupler, its as semiconductor devices, the signal that in use makes to transmit due to the variation of environment temperature produces temperature and floats and cause voltage measurement to produce larger error.
The utility model content
The technical problems to be solved in the utility model is, complicated for circuit in the above-mentioned use procedure of prior art, float owing to being subject to temperature that variation of ambient temperature causes the defect that problem and the linearity do not meet accuracy requirement, the utility model provides a kind of electric leakage autoreclose breaker voltage signal conditioning circuit, the phase line of power supply phase voltage or line voltage is through the anode of commutation diode D1, the end of the negative electrode of commutation diode D1 and dropping resistor R1 is connected, and also comprises:
Phase voltage line voltage selecting circuit, the zero line of described power supply phase voltage or line voltage or another phase line of line voltage are connected with the input end of phase voltage line voltage selecting circuit;
Voltage feedback circuit, described voltage feedback circuit one end is connected with R1, and the other end is connected with described phase voltage line voltage selecting circuit;
Diode D2, described diode D2 is connected with described photoelectrical coupler U1;
Direct supply VCC, described direct supply VCC is connected with 6 pin of described photoelectrical coupler U1b;
Analog to digital converter AD1, described analog to digital converter AD1 is connected with 5 pin of photoelectrical coupler U1b;
Resistance R 4, described resistance R 4 one ends are connected with 5 pin of photoelectrical coupler U1b, other end ground connection;
Filter capacitor C1, described filter capacitor C1 mono-end is connected with described analog to digital converter AD1, other end ground connection.
Further, described phase voltage line voltage selecting circuit consists of resistance R 2, resistance R 3, zero-power line N, another phase line of power supply B, and an end of resistance R 2 is connected with zero-power line N, and another phase line of an end and power supply B of resistance R 3 is connected.
Further, described phase voltage line voltage selecting circuit is for realizing the general of three-phase three-wire system and three-phase four-wire system.
Further, described voltage feedback circuit consists of photoelectrical coupler U1b.
Further, described photoelectrical coupler U1 consists of photoelectrical coupler U1a, photoelectrical coupler U1b, and the 8th pin of photoelectrical coupler U1a is connected with the 1st pin, and the 4th pin of the 7th pin and U1b is connected, and the 2nd pin of U1a and the 3rd pin of U1b are connected.
Further, the other end of resistance R 2, R3 links together and is connected with the 4th end of photoelectrical coupler U1.
Further, described photoelectrical coupler U1a, the same unit package of U1b.
Further, the 6th pin of described photoelectrical coupler U1 is connected directly to direct supply VCC, the end ground connection of resistance R 4 and filter capacitor C1, and the 5th pin of the other end and photoelectrical coupler U1 is connected.
Implement electric leakage autoreclose breaker voltage signal conditioning circuit of the present utility model, there is following beneficial effect: one, effectively solve that photoelectrical coupler is subject to the impact of environment temperature and the temperature that produces is floated problem, and its linearity is improved greatly, more meet the requirement that electric leakage autoreclose breaker voltage signal is accurately measured; Two, photoelectrical coupler adopts a unit package pattern, reduce the fabrication error that photoelectrical coupler produces in process of production, such two photoelectrical couplers temperature characterisitic the same, the temperature produced is floated and can be cancelled out each other, and can effectively resist the temperature that the impact due to environment temperature produces and float problem; Three, the selection circuit of line voltage and phase voltage, can effectively realize the general of three-phase three-wire system and three-phase four-wire system.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is that prior art be take the voltage signal conditioning circuit that photoelectrical coupler is core;
Fig. 2 is that prior art be take the voltage signal conditioning circuit that photoelectrical coupler coordinates as core band amplifier;
Fig. 3 is the utility model electric leakage autoreclose breaker voltage signal conditioning circuit schematic diagram;
Fig. 4 is three-phase four-wire system of the present invention and three-phase three-wire system voltage signal conditioning circuit A phase embodiment.
Fig. 5 is three-phase four-wire system of the present invention and three-phase three-wire system voltage signal conditioning circuit B phase embodiment.
Fig. 6 is three-phase four-wire system of the present invention and three-phase three-wire system voltage signal conditioning circuit C phase embodiment.
Embodiment
Refer to Fig. 1, Fig. 1 is that prior art be take the voltage signal conditioning circuit that photoelectrical coupler is core.
Refer to Fig. 2, Fig. 2 is that prior art be take the voltage signal conditioning circuit that photoelectrical coupler coordinates as core band amplifier.
Refer to Fig. 3, Fig. 3 is the utility model electric leakage autoreclose breaker voltage signal conditioning circuit schematic diagram.As shown in Figure 3: the phase line of power supply phase voltage (or line voltage) is through the anode of commutation diode D1, its zero line (or another phase line of line voltage) is connected with the input end of phase voltage line voltage selecting circuit, wherein phase voltage line voltage selecting circuit is comprised of resistance R 2, R3, one end of resistance R 2 is connected with zero-power line, another phase line of an end and power supply of resistance R 3 is connected, and the other end of resistance R 2, R3 links together and is connected with the 4th end of photoelectrical coupler U1.The end of the negative electrode of commutation diode D1 and dropping resistor R1 is connected; the other end of dropping resistor R1 is connected to the 1st end of photoelectrical coupler U1; limited amplitude protection diode D2 is attempted by the 1st pin and the 4th pin of photoelectrical coupler U1, and its anodic bonding is at the 4th pin, and negative electrode is connected to the 1st pin.The 8th pin of photoelectrical coupler U1 is connected with the 1st pin, and the 7th pin is connected with the 4th pin, and the 2nd pin and the 3rd pin connect and compose a Voltage Feedback passage.The 6th pin of photoelectrical coupler U1 is connected directly to direct supply VCC, the end ground connection of pull down resistor R4 and filter capacitor C1, and the 5th pin of the other end and photoelectrical coupler U1 is connected.
Refer to Fig. 4, Fig. 4 is three-phase four-wire system of the present invention and three-phase three-wire system voltage signal conditioning circuit A phase embodiment.Fig. 4 is the embodiment on Fig. 3 basis.
Refer to Fig. 5, Fig. 5 is three-phase four-wire system of the present invention and three-phase three-wire system voltage signal conditioning circuit B phase embodiment.Fig. 5 is the embodiment on Fig. 3 basis.
Refer to Fig. 6, Fig. 6 is three-phase four-wire system of the present invention and three-phase three-wire system voltage signal conditioning circuit C phase embodiment.Fig. 6 is the embodiment on Fig. 3 basis.
Unique distinction of the present utility model is to have set up one, the U1 photoelectrical coupler forms voltage feedback circuit, can effectively solve that photoelectrical coupler is subject to the impact of environment temperature and the temperature that produces is floated problem, and its linearity is improved greatly, more meet the requirement that electric leakage autoreclose breaker voltage signal is accurately measured; Two, to adopt a unit package be that U1a and U1b are in same unit package to photoelectrical coupler, reduce the fabrication error that photoelectrical coupler produces in process of production, such two photoelectrical couplers temperature characterisitic the same, the temperature produced is floated and can be cancelled out each other, and can effectively resist the temperature that the impact due to environment temperature produces and float problem; Three, the selection circuit of line voltage and phase voltage, can effectively realize the general of three-phase three-wire system and three-phase four-wire system.
By comparison diagram 1, Fig. 2 and Fig. 3, can find out by adopting the utility model to there is following beneficial effect: one, effectively solve that photoelectrical coupler is subject to the impact of environment temperature and the temperature that produces is floated problem, and its linearity is improved greatly; Two, photoelectrical coupler adopts a unit package pattern, reduce the fabrication error that photoelectrical coupler produces in process of production, such two photoelectrical couplers temperature characterisitic the same, the temperature produced is floated and can be cancelled out each other, and can effectively resist the temperature that the impact due to environment temperature produces and float problem; Three, the selection circuit of line voltage and phase voltage, can effectively realize the general of three-phase three-wire system and three-phase four-wire system.
The utility model is described according to specific embodiment, but it will be understood by those skilled in the art that when not breaking away from the utility model scope, can carry out various variations and be equal to replacement.In addition, for adapting to the specific occasion of the utility model technology, can carry out many modifications and not break away from its protection domain the utility model.Therefore, the utility model is not limited to specific embodiment disclosed herein, and comprises all embodiment that drop into the claim protection domain.
Claims (8)
1. an electric leakage autoreclose breaker voltage signal conditioning circuit, the phase line of power supply phase voltage or line voltage is through the anode of commutation diode D1, and the end of the negative electrode of commutation diode D1 and dropping resistor R1 is connected, and it is characterized in that: also comprise
Phase voltage line voltage selecting circuit, the zero line of described power supply phase voltage or line voltage or another phase line of line voltage are connected with the input end of phase voltage line voltage selecting circuit;
Voltage feedback circuit, described voltage feedback circuit one end is connected with R1, and the other end is connected with described phase voltage line voltage selecting circuit;
Diode D2, described diode D2 is connected with described photoelectrical coupler U1;
Direct supply VCC, described direct supply VCC is connected with 6 pin of described photoelectrical coupler U1b;
Analog to digital converter AD1, described analog to digital converter AD1 is connected with 5 pin of photoelectrical coupler U1b;
Resistance R 4, described resistance R 4 one ends are connected with 5 pin of photoelectrical coupler U1b, other end ground connection;
Filter capacitor C1, described filter capacitor C1 mono-end is connected with described analog to digital converter AD1, other end ground connection.
2. electric leakage autoreclose breaker voltage signal conditioning circuit according to claim 1, it is characterized in that, described phase voltage line voltage selecting circuit consists of resistance R 2, resistance R 3, zero-power line N, another phase line of power supply B, one end of resistance R 2 is connected with zero-power line N, and another phase line of an end and power supply B of resistance R 3 is connected.
3. electric leakage autoreclose breaker voltage signal conditioning circuit according to claim 1, is characterized in that, described phase voltage line voltage selecting circuit is for realizing the general of three-phase three-wire system and three-phase four-wire system.
4. electric leakage autoreclose breaker voltage signal conditioning circuit according to claim 1, is characterized in that, described voltage feedback circuit consists of photoelectrical coupler U1a.
5. electric leakage autoreclose breaker voltage signal conditioning circuit according to claim 4, it is characterized in that, described photoelectrical coupler U1 consists of photoelectrical coupler U1a, photoelectrical coupler U1b, the 8th pin of photoelectrical coupler U1a is connected with the 1st pin, the 4th pin of the 7th pin and U1b is connected, and the 2nd pin of U1a and the 3rd pin of U1b are connected.
6. electric leakage autoreclose breaker voltage signal conditioning circuit according to claim 2, is characterized in that, the other end of resistance R 2, R3 links together and is connected with the 4th end of photoelectrical coupler U1b.
7. electric leakage autoreclose breaker voltage signal conditioning circuit according to claim 4, is characterized in that, described photoelectrical coupler U1a, the same unit package of U1b.
8. according to claim 2 or 3 or 4 described electric leakage autoreclose breaker voltage signal conditioning circuits, it is characterized in that, the 6th pin of described photoelectrical coupler U1 is connected directly to direct supply VCC, the end ground connection of resistance R 4 and filter capacitor C1, the 5th pin of the other end and photoelectrical coupler U1 is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204195635U CN203337717U (en) | 2013-07-15 | 2013-07-15 | Voltage signal conditioning circuit for electric leakage auto-reclosing circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204195635U CN203337717U (en) | 2013-07-15 | 2013-07-15 | Voltage signal conditioning circuit for electric leakage auto-reclosing circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN203337717U true CN203337717U (en) | 2013-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013204195635U Expired - Fee Related CN203337717U (en) | 2013-07-15 | 2013-07-15 | Voltage signal conditioning circuit for electric leakage auto-reclosing circuit breaker |
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| CN (1) | CN203337717U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364613A (en) * | 2013-07-15 | 2013-10-23 | 长城电器集团有限公司 | Voltage signal conditioning circuit of automatic reclosing lock breaker in time of electric leakage |
| CN104569554A (en) * | 2015-01-28 | 2015-04-29 | 长城电器集团有限公司 | Double-power-supply voltage detection circuit |
-
2013
- 2013-07-15 CN CN2013204195635U patent/CN203337717U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364613A (en) * | 2013-07-15 | 2013-10-23 | 长城电器集团有限公司 | Voltage signal conditioning circuit of automatic reclosing lock breaker in time of electric leakage |
| CN104569554A (en) * | 2015-01-28 | 2015-04-29 | 长城电器集团有限公司 | Double-power-supply voltage detection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170912 Address after: 2-1 No. 325000 Zhejiang North white elephant Yueqing White Town Road (South) Patentee after: Zhejiang Kai FA Electric Co., Ltd. Address before: 2-1 No. 325000 Zhejiang North white elephant Yueqing White Town Road Patentee before: CNC Electric Group Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 325000 No. 2-1 Baixiang Avenue, Beibeixiang Town, Yueqing City, Zhejiang Province (South Building) Patentee after: Great Wall Electrical Appliance Group Zhejiang Technology Co., Ltd. Address before: 325000 No. 2-1 Baixiang Avenue, Beibeixiang Town, Yueqing City, Zhejiang Province (South Building) Patentee before: Zhejiang Kai FA Electric Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131211 Termination date: 20200715 |