CN103364613A - Voltage signal conditioning circuit of automatic reclosing lock breaker in time of electric leakage - Google Patents
Voltage signal conditioning circuit of automatic reclosing lock breaker in time of electric leakage Download PDFInfo
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- CN103364613A CN103364613A CN2013102956157A CN201310295615A CN103364613A CN 103364613 A CN103364613 A CN 103364613A CN 2013102956157 A CN2013102956157 A CN 2013102956157A CN 201310295615 A CN201310295615 A CN 201310295615A CN 103364613 A CN103364613 A CN 103364613A
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Abstract
The invention relates to a voltage signal conditioning circuit of an automatic reclosing lock breaker in the time of electric leakage. A phase line of power supply phase voltage or line voltage goes through the anode of a diode D1 and the cathode of the phase line is connected with one end of a resistor R1. The voltage signal conditioning circuit further comprises a phase voltage and line voltage selecting circuit, a voltage feedback circuit, a diode D2, a direct-current power supply VCC, an analog-digital converter AD1, a resistor R4 and a filter capacitor C1. A null line of the phase voltage and line voltage selecting circuit or the other phase line of the line voltage is connected with the input end of the phase voltage and line voltage selecting circuit. One end of the voltage feedback circuit is connected with the R1 and the other end of the voltage feedback circuit is connected with the phase voltage and line voltage selecting 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 analog-digital converter AD1 is connected with a photoelectric coupler U1b. One end of the resistor R4 is connected with five pins of the photoelectric coupler U1b and the other end of the resistor R4 is connected to the ground. One end of the filter capacitor C1 is connected with the analog-digital converter AD1 and the other end of the filter capacitor C1 is connected to the ground. The voltage signal conditioning circuit of the automatic reclosing lock breaker in the time of electric leakage can solve the problem of temperature excursion, improve linearity and achieve common use of a three-phase three-wire system and a three-phase four-wire system.
Description
Technical field
The present invention relates to a kind of voltage signal conditioning circuit, more particularly, relate 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 in the delivery applications of digital quantity and switching value, demonstrate fully its simple, reliable advantage.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 causes 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 cooperate 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 cooperate 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.Only has a photoelectrical coupler in the voltage signal conditioning circuit that existing employing photoelectrical coupler is core, its as semiconductor devices, in use because the variation of environment temperature makes the signal of transmission produce temperature floats and cause voltage measurement to produce larger error.
Summary of the invention
The technical problem to be solved in the present invention is, complicated for circuit in the above-mentioned use procedure of prior art, float the defective that problem and the linearity do not satisfy accuracy requirement owing to being subject to temperature that variation of ambient temperature causes, the invention 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 negative electrode of commutation diode D1 is connected an end and is connected with dropping resistor R1, 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 other end ground connection with 5 pin of photoelectrical coupler U1b;
Filter capacitor C1, described filter capacitor C1 one end is connected other end ground connection with described analog to digital converter AD1.
Further, described phase voltage line voltage selecting circuit is made 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 an end of resistance R 3 is connected phase line B and is connected with power supply.
Further, described phase voltage line voltage selecting circuit is used for realizing the general of three-phase three-wire system and three-phase four-wire system.
Further, described voltage feedback circuit is made of photoelectrical coupler U1b.
Further, described photoelectrical coupler U1 is made of photoelectrical coupler U1a, photoelectrical coupler U1b, and the 8th pin of photoelectrical coupler U1a connects with the 1st pin, and the 7th pin is connected the 4th pin and is connected with U1b, and the 2nd pin of U1a is connected the 3rd pin and is connected with U1b.
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 other end is connected the 5th pin and is connected with photoelectrical coupler U1.
Implement electric leakage autoreclose breaker voltage signal conditioning circuit of the present invention, has following beneficial effect: solve effectively one, that photoelectrical coupler is subjected 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 that produces is floated and can be cancelled out each other, and can effectively resist the temperature that the impact owing to environment temperature produces and float problem; Three, the selection circuit of line voltage and phase voltage can effectively be realized the general of three-phase three-wire system and three-phase four-wire system.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the voltage signal conditioning circuit of prior art take photoelectrical coupler as core;
Fig. 2 is the voltage signal conditioning circuit that prior art cooperates take photoelectrical coupler as core band amplifier;
Fig. 3 is the present invention's autoreclose breaker voltage signal conditioning circuit schematic diagram that leaks electricity;
Fig. 4 is three-phase four-wire system of the present invention and three-phase three-wire system voltage signal conditioning circuit A embodiment mutually.
Fig. 5 is three-phase four-wire system of the present invention and three-phase three-wire system voltage signal conditioning circuit B embodiment mutually.
Fig. 6 is three-phase four-wire system of the present invention and three-phase three-wire system voltage signal conditioning circuit C embodiment mutually.
Embodiment
See also Fig. 1, Fig. 1 is the voltage signal conditioning circuit of prior art take photoelectrical coupler as core.
See also Fig. 2, Fig. 2 is the voltage signal conditioning circuit that prior art cooperates take photoelectrical coupler as core band amplifier.
See also Fig. 3, Fig. 3 is the present invention's autoreclose breaker voltage signal conditioning circuit schematic diagram that leaks electricity.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, one end of resistance R 3 is connected phase line and is connected with power supply, the other end of resistance R 2, R3 links together and is connected with the 4th end of photoelectrical coupler U1.The negative electrode of commutation diode D1 is connected an end and is connected with dropping resistor R1; 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 connects with the 1st pin, and the 7th pin connects 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 other end is connected the 5th pin and is connected with photoelectrical coupler U1.
See also 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 embodiment mutually.Fig. 4 is the embodiment on Fig. 3 basis.
See also 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 embodiment mutually.Fig. 5 is the embodiment on Fig. 3 basis.
See also 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 embodiment mutually.Fig. 6 is the embodiment on Fig. 3 basis.
Unique distinction of the present invention is to have set up one, the U1 photoelectrical coupler consists of voltage feedback circuit, can solve effectively that photoelectrical coupler is subjected 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 that produces is floated and can be cancelled out each other, and can effectively resist the temperature that the impact owing to environment temperature produces and float problem; Three, the selection circuit of line voltage and phase voltage can effectively be realized 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 present invention to have following beneficial effect: solve effectively one, that photoelectrical coupler is subjected 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 that produces is floated and can be cancelled out each other, and can effectively resist the temperature that the impact owing to environment temperature produces and float problem; Three, the selection circuit of line voltage and phase voltage can effectively be realized the general of three-phase three-wire system and three-phase four-wire system.
The present invention is described according to specific embodiment, but it will be understood by those skilled in the art that when not breaking away from the scope of the invention, can carry out various variations and be equal to replacement.In addition, for adapting to the specific occasion of the technology of the present invention, can carry out many modifications and not break away from its protection domain the present invention.Therefore, the present invention is not limited to specific embodiment disclosed herein, and comprises that all drop into the embodiment of claim protection domain.
Claims (8)
1. electric leakage autoreclose breaker voltage signal conditioning circuit, the phase line of power supply phase voltage or line voltage be through the anode of commutation diode D1, and the negative electrode of commutation diode D1 is connected an end and is connected with dropping resistor R1, 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 other end ground connection with 5 pin of photoelectrical coupler U1b;
Filter capacitor C1, described filter capacitor C1 one end is connected other end ground connection with described analog to digital converter AD1.
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 is made 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 an end of resistance R 3 is connected phase line B and is connected with power supply.
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 used 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 is made 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 is made of photoelectrical coupler U1a, photoelectrical coupler U1b, the 8th pin of photoelectrical coupler U1a connects with the 1st pin, the 7th pin is connected the 4th pin and is connected with U1b, the 2nd pin of U1a is connected the 3rd pin and is connected with U1b.
6. according to claim 2 or 3 or 4 described electric leakage autoreclose breaker voltage signal conditioning circuits, it 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 other end are connected the 5th pin and connect with photoelectrical coupler U1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102956157A CN103364613A (en) | 2013-07-15 | 2013-07-15 | Voltage signal conditioning circuit of automatic reclosing lock breaker in time of electric leakage |
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| CN2013102956157A CN103364613A (en) | 2013-07-15 | 2013-07-15 | Voltage signal conditioning circuit of automatic reclosing lock breaker in time of electric leakage |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569554A (en) * | 2015-01-28 | 2015-04-29 | 长城电器集团有限公司 | Double-power-supply voltage detection circuit |
| CN105261614A (en) * | 2015-11-02 | 2016-01-20 | 华润半导体（深圳）有限公司 | Optocoupler packaging structure, voltage feedback circuit, system, device, and packaging method |
| CN107907728A (en) * | 2017-10-11 | 2018-04-13 | 深圳供电局有限公司 | A kind of linear photoelectric isolation circuit for suppressing temperature drift |
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| DE3716140A1 (en) * | 1987-05-14 | 1988-11-24 | Rutenbeck Wilhelm Gmbh & Co | Power connection relay (PCR) for telephone networks operated according to the ISDN system |
| GB2339295A (en) * | 1998-02-12 | 2000-01-19 | Furukawa Electric Co Ltd | Instrument for measuring alternating current |
| CN2938119Y (en) * | 2006-08-08 | 2007-08-22 | 浙江德力西电器股份有限公司 | Photoelectric coupling AC voltage separation measuring circuit |
| CN200944134Y (en) * | 2006-08-31 | 2007-09-05 | 陈炳杰 | Three-phase four-wire power supply fault monitoring circuit |
| CN201083797Y (en) * | 2007-09-18 | 2008-07-09 | 冯俊博 | Portable insulating oil dielectric strength determinator |
| CN203337717U (en) * | 2013-07-15 | 2013-12-11 | 长城电器集团有限公司 | Voltage signal conditioning circuit for electric leakage auto-reclosing circuit breaker |
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2013
- 2013-07-15 CN CN2013102956157A patent/CN103364613A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3716140A1 (en) * | 1987-05-14 | 1988-11-24 | Rutenbeck Wilhelm Gmbh & Co | Power connection relay (PCR) for telephone networks operated according to the ISDN system |
| GB2339295A (en) * | 1998-02-12 | 2000-01-19 | Furukawa Electric Co Ltd | Instrument for measuring alternating current |
| CN2938119Y (en) * | 2006-08-08 | 2007-08-22 | 浙江德力西电器股份有限公司 | Photoelectric coupling AC voltage separation measuring circuit |
| CN200944134Y (en) * | 2006-08-31 | 2007-09-05 | 陈炳杰 | Three-phase four-wire power supply fault monitoring circuit |
| CN201083797Y (en) * | 2007-09-18 | 2008-07-09 | 冯俊博 | Portable insulating oil dielectric strength determinator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569554A (en) * | 2015-01-28 | 2015-04-29 | 长城电器集团有限公司 | Double-power-supply voltage detection circuit |
| CN105261614A (en) * | 2015-11-02 | 2016-01-20 | 华润半导体（深圳）有限公司 | Optocoupler packaging structure, voltage feedback circuit, system, device, and packaging method |
| CN105261614B (en) * | 2015-11-02 | 2017-10-31 | 华润半导体（深圳）有限公司 | Optocoupler encapsulating structure, voltage feedback circuit, system, equipment and method for packing |
| CN107907728A (en) * | 2017-10-11 | 2018-04-13 | 深圳供电局有限公司 | A kind of linear photoelectric isolation circuit for suppressing temperature drift |
| CN107907728B (en) * | 2017-10-11 | 2020-04-24 | 深圳供电局有限公司 | Linear photoelectric isolation circuit for inhibiting temperature drift |
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Application publication date: 20131023 |