CN105375747B - A kind of analogue quantity output circuit device of Fiber isolation - Google Patents
A kind of analogue quantity output circuit device of Fiber isolation Download PDFInfo
- Publication number
- CN105375747B CN105375747B CN201510891461.7A CN201510891461A CN105375747B CN 105375747 B CN105375747 B CN 105375747B CN 201510891461 A CN201510891461 A CN 201510891461A CN 105375747 B CN105375747 B CN 105375747B
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- China
- Prior art keywords
- circuit
- signal
- resistance
- voltage
- order filter
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
- H02M1/092—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the control signals being transmitted optically
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/24—Frequency-independent attenuators
Abstract
A kind of analogue quantity output circuit device of Fiber isolation, belongs to converter topology field.Optical receiving circuit, shaping and negater circuit, second-order filter circuit, attenuation compensation circuit, voltage offset circuits, four times of amplifying circuits.Wherein optical receiving circuit is connected with shaping with negater circuit.Shaping is connected with negater circuit with second-order filter circuit.Second-order filter circuit is connected with attenuation compensation circuit.Attenuation compensation circuit is connected with voltage offset circuits.Voltage offset circuits are connected with four times of amplifying circuits.Advantage is that signal solves the problems, such as that signal is easily disturbed, and signal can transmit larger distance by optical transport.
Description
Technical field
The invention belongs to converter topology field, the analogue quantity output circuit in particular, providing a kind of Fiber isolation fills
Put.Solve the problems, such as that signal long-distance transmissions and signal are easily disturbed in Large-power Driving System.
Background technology
With the development of Power Electronic Technique, the power of unsteady flow is increasing, particularly at several megawatts to tens megawatts
In high-power converter, the cabinet of current transformer is very long, signal transmission it is distant, in general electric signal be difficult transmission it is so remote away from
From, and due to the switch of current transformer power device, cause electromagnetic interference very serious.Analog signal be weak signal be easy to by
To interference.
The content of the invention
It is an object of the invention to provide a kind of analogue quantity output circuit device of Fiber isolation, solve in high-power biography
The problem of signal long-distance transmissions and signal are easily disturbed in dynamic system, can quickly react, realize signal Phototube Coupling, two
Rank low frequency filtering, attenuation compensation, the purpose of skew amplification.
The present invention includes：Optical receiving circuit a, shaping and negater circuit b, second-order filter circuit c, attenuation compensation circuit d,
Voltage offset circuits e, four times of amplifying circuit f.Wherein optical receiving circuit a is connected with shaping with negater circuit b.Shaping with reversely
Circuit b is connected with second-order filter circuit c.Second-order filter circuit c is connected with attenuation compensation circuit d.Attenuation compensation circuit d and voltage
Off-centre circuit e is connected.Voltage offset circuits e is connected with four times of amplifying circuit f.
Optical receiving circuit a of the present invention is made up of 1 fiber optic receiver and 1 electric capacity.Fiber optic receiver is responsible for
Complete the reception of optical signal and the conversion of electric signal.Electric capacity is added between+5V power supplys and ground, as decoupling capacitor.
Shaping of the present invention is made up of with negater circuit b by 1 phase inverter chip, resistance R67, electric capacity C35 etc..
The reverse of incoming level is completed inside phase inverter chip, and is exported.For resistance R67 as pull down resistor, electric capacity C35 is decoupling electricity
Hold.The circuit can ensure the low and high level of output signal close to 5V and 0V.
Second-order filter circuit c of the present invention is by resistance R2, R7, R8, R9, electric capacity C5, C6 and amplifier composition.
The second order filter is designed according to second order Butterworth filter, and its specific filtering parameter is believed according to input
Number frequency is that 4k Hz calculate gained.
Attenuation compensation circuit d of the present invention is made up of resistance R11, R12, R15, R16 and an amplifier.Its purpose
It is that attenuation compensation is carried out to filter output signal.Output voltage is 0-5V.
Voltage offset circuits e of the present invention is exactly a subtraction circuit in fact, by resistance R1, R3, R5 and one
Amplifier chip forms.It is defeated the purpose is to the skew that the voltage signal of the output 0-5V to attenuation compensation circuit d be 2.5V
Go out for -2.5V-2.5V voltage signals.
Four times of amplifying circuit f of the present invention are made up of resistance R4, R6, R13, R14 and an amplifier.Circuit master
It is responsible for carrying out -2.5V-2.5V the voltage signals of voltage offset circuits e outputs 4 times of amplifications, output -10V-10V simulation electricity
Press signal, convenient detection.
Brief description of the drawings
Fig. 1 is the basic flow sheet of Fiber isolation analogue quantity output circuit.
Fig. 2 is optical receiving circuit a, shaping and negater circuit b, second-order filter circuit c annexation figure.
Fig. 3 is attenuation compensation circuit d, voltage offset circuits e, four times of amplifying circuit f annexation figure.
Fig. 4 is reference data circuit g design drawing.
Embodiment
In order to more specifically describe the present invention, below in conjunction with the accompanying drawings and embodiment is to technical scheme and its phase
Principle is closed to be described in detail.The description to embodiment is used for the purpose of providing to this by showing the example of the present invention below
Invention is clearly explained.The invention is not restricted to any concrete configuration being set forth below, but before spirit of the present invention is not departed from
Put any modification, replacement, the improvement for covering related elements.
As shown in the basic flow sheet of Fig. 1 Fiber isolation analogue quantity output circuits, the present invention include optical receiving circuit a,
Shaping and negater circuit b, second-order filter circuit c, attenuation compensation circuit d, voltage offset circuits e, four times of amplifying circuit f.In Fig. 3
Voltage offset circuits e in need to introduce 2.5V reference voltage, therefore have the reference circuit g in Fig. 4.
As shown in Fig. 2 described optical receiving circuit a, is made up of a fiber optic receiver and an electric capacity.Optical fiber receives
Device model HFBR-2523Z, its pin 5,8 are signal port, and 1,4 pins are connected, and export electric signal.3 pins connect 5V power supplys,
And it is connected by 0.1uF electric capacity C1 and 2 pins and is grounded.
As shown in Fig. 2 described shaping and negater circuit b are by 74HCT14D phase inverter chips, resistance R67,0.1uF electric capacity
C35 etc. is formed.Wherein, for 1 pin as input pin, 2 pin are output pin after signals reverse.11st, 13 pins are through pull down resistor R67
Ground connection, with directly connecing power supply, 14 pin connect+5V power supplys to 7 pin, then are grounded through decoupling capacitor C35.Remaining pin is hanging.
As shown in Fig. 2 described second-order filter circuit c, by resistance R2, R7, R8, R9, electric capacity C5, C6 and amplifier
Composition.Wherein, resistance R2, R7, R8, R9, electric capacity C5, C6 form a second-order filter circuit, and amplifier carries out signal amplification, defeated
Go out 0-5V electric signals.
As shown in figure 3, described attenuation compensation circuit d, is made up of resistance R11, R12, R15, R16 and an amplifier.
Due in Fig. 2 second-order filter circuits c, certain decay can be caused to the fundamental voltage amplitude of input signal, and adjust second-order filter
Two resistance that amplification coefficient is influenceed in circuit easily cause circuit oscillation, therefore can not be amplified in second-order filter circuit and be
Several adjustment.Design in-phase proportion amplifying circuit is amplified to compensate the decay of second-order filter circuit, and multiplication factor can pass through
Resistance R11, R12, R15, R16 are adjusted, if R11 can be removed by being not required to compensation, R15 is changed into following circuit.
As shown in figure 3, described voltage offset circuits e, is made up of resistance R1, R3, R5 and an amplifier chip.The electricity
It is a subtraction circuit in fact to press off-centre circuit, attenuation compensation circuit d output signal is subtracted 2.5V electricity substantially
Pressure.Exported in this way, input 0-5V inputs are converted to -2.5-2.5V voltage signals.
As shown in figure 3, four times of described amplifying circuit f are made up of resistance R4, R6, R13, R14 and an amplifier.The electricity
R13 in road, R14 resistance form resistance-feedback network, complete 4 times of amplifications of input signal.Current limliting of the R6 resistance as output
Resistance.
As shown in figure 4, described reference circuit g is made up of power supply chip REF3025 and electric capacity C33.Power supply chip
REF3025 1 pin connects+5V power supplys, then is connected to the ground by decoupling capacitor C33, and its 3 pin is directly grounded.2 pin are as output signal
End, output+2.5V voltage-stabilized power supply is as reference voltage.
Claims (5)
- A kind of 1. analogue quantity output circuit device of Fiber isolation, it is characterised in that including：Optical receiving circuit (a), shaping with Negater circuit (b), second-order filter circuit (c), attenuation compensation circuit (d), voltage offset circuits (e), four times of amplifying circuits (f)； Optical receiving circuit (a) is connected with shaping with negater circuit (b), shaping and negater circuit (b) and second-order filter circuit (c) phase Even, second-order filter circuit (c) is connected with attenuation compensation circuit (d), and attenuation compensation circuit (d) is connected with voltage offset circuits (e), Voltage offset circuits (e) are connected with four times of amplifying circuits (f)；Described shaping includes 1 phase inverter chip, resistance R67, electric capacity C35 with negater circuit (b)；Inside phase inverter chip The reverse of incoming level is completed, and is exported；For resistance R67 as pull down resistor, electric capacity C35 is decoupling capacitor；The circuit ensures defeated Go out the low and high level of signal close to 5V and 0V；Described attenuation compensation circuit (d) is made up of resistance R11, R12, R15, R16 and an amplifier；To second-order filter circuit Output signal carries out attenuation compensation, output voltage 0-5V.
- 2. the analogue quantity output circuit device of Fiber isolation according to claim 1, it is characterised in that described optical fiber connects Circuit (a) is received to be made up of 1 fiber optic receiver and 1 electric capacity；Fiber optic receiver is responsible for completing reception and the electric signal of optical signal Conversion, electric capacity is added between+5V power supplys and ground, as decoupling capacitor.
- 3. the analogue quantity output circuit device of Fiber isolation according to claim 1, it is characterised in that described second order filter Wave circuit (c) is by resistance R2, R7, R8, R9, electric capacity C5, C6 and amplifier composition；The second-order filter circuit is according to second order What Butterworth filter was designed, its specific filtering parameter is according to obtained by frequency input signal is 4k Hz calculating.
- 4. the analogue quantity output circuit device of Fiber isolation according to claim 1, it is characterised in that described voltage is inclined Shift circuit (e) is a subtraction circuit, is made up of resistance R1, R3, R5 and an amplifier chip；To attenuation compensation circuit (d) output 0-5V voltage signal do 2.5V skew, exports as -2.5V-2.5V voltage signals.
- 5. the analogue quantity output circuit device of Fiber isolation according to claim 1, it is characterised in that described four times are put Big circuit (f) is made up of resistance R4, R6, R13, R14 and an amplifier；Be responsible for voltage offset circuits (e) output- 2.5V-2.5V voltage signals carry out 4 times of amplifications, output -10V-10V analog voltage signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510891461.7A CN105375747B (en) | 2015-11-30 | 2015-12-07 | A kind of analogue quantity output circuit device of Fiber isolation |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510860575 | 2015-11-30 | ||
| CN2015108605755 | 2015-11-30 | ||
| CN201510891461.7A CN105375747B (en) | 2015-11-30 | 2015-12-07 | A kind of analogue quantity output circuit device of Fiber isolation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105375747A CN105375747A (en) | 2016-03-02 |
| CN105375747B true CN105375747B (en) | 2017-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510891461.7A Expired - Fee Related CN105375747B (en) | 2015-11-30 | 2015-12-07 | A kind of analogue quantity output circuit device of Fiber isolation |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532951A (en) * | 2009-04-03 | 2009-09-16 | 西安交通大学 | Optical fiber mixed gas quantitative measurement system and measurement method |
| CN103399193A (en) * | 2013-08-05 | 2013-11-20 | 东南大学 | Variable optical attenuator-based bus current detection method and current transformer equipment |
| US8994457B2 (en) * | 2011-09-07 | 2015-03-31 | International Business Machines Corporation | Transimpedance amplifier |
| CN205160356U (en) * | 2015-11-30 | 2016-04-13 | 冶金自动化研究设计院 | Analog output circuit arrangement that optic fibre is kept apart |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3737058B2 (en) * | 2002-03-12 | 2006-01-18 | 沖電気工業株式会社 | Analog addition / subtraction circuit, main amplifier, level identification circuit, optical reception circuit, optical transmission circuit, automatic gain control amplification circuit, automatic frequency characteristic compensation amplification circuit, and light emission control circuit |
-
2015
- 2015-12-07 CN CN201510891461.7A patent/CN105375747B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532951A (en) * | 2009-04-03 | 2009-09-16 | 西安交通大学 | Optical fiber mixed gas quantitative measurement system and measurement method |
| US8994457B2 (en) * | 2011-09-07 | 2015-03-31 | International Business Machines Corporation | Transimpedance amplifier |
| CN103399193A (en) * | 2013-08-05 | 2013-11-20 | 东南大学 | Variable optical attenuator-based bus current detection method and current transformer equipment |
| CN205160356U (en) * | 2015-11-30 | 2016-04-13 | 冶金自动化研究设计院 | Analog output circuit arrangement that optic fibre is kept apart |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105375747A (en) | 2016-03-02 |
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Granted publication date: 20171114 Termination date: 20181207 |