CN206077337U - A kind of rotating transformer exciting signal modulation circuit - Google Patents
A kind of rotating transformer exciting signal modulation circuit Download PDFInfo
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- CN206077337U CN206077337U CN201621076218.6U CN201621076218U CN206077337U CN 206077337 U CN206077337 U CN 206077337U CN 201621076218 U CN201621076218 U CN 201621076218U CN 206077337 U CN206077337 U CN 206077337U
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- outfan
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- modulation circuit
- signal modulation
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Abstract
This utility model is related to a kind of rotating transformer exciting signal modulation circuit, including sine-wave oscillator, its outfan is mutually coupled with anti-phase proportional amplifier, the outfan of anti-phase proportional amplifier is coupled to the input of second order passive low ventilating filter, the outfan of second order passive low ventilating filter is coupled directly to the input of voltage follower, and the outfan of voltage follower is the outfan of rotating transformer exciting signal modulation circuit.This utility model adopts anti-phase proportional amplifier, and which has relatively low common mode rejection ratio, and circuit anti-interference ability is strong；The gain of operational amplifier is progressively adjusted by potentiometer, and then changes signal amplitude, control method is convenient；The output impedance of modulation circuit is adjusted by potentiometer, to the purpose for reaching late-class circuit impedance matching；Circuit structure is simple, reliable operation, low cost few using part category and quantity, can meet the demand under various environmental conditions.
Description
Technical field
This utility model is related to technical field of electromechanical control, especially a kind of rotating transformer exciting signal modulation circuit.
Background technology
Rotary transformer is a kind of angle measurement element of servosystem, is widely used in military and civilian good engineering at present.It
It is a kind of revolving small-sized ac motor, is made up of with rotor stator, wherein, primary side of the stator winding for transformator,
It is mainly used in receiving excitation voltage；Rotor windings are the secondary side of transformator, produce induced voltage by electromagnetic coupled.Work as rotor
During rotation, it is identical with excitation voltage frequency that two ends of rotor can sense output frequency, and amplitude strictly does sine and cosine change with deflection angle
Biphase orthogonal mode analog quantity.
According to the angle measuring principle of rotary transformer, which is passive element, just must be introduced specifically at excitatory end during use
String signal is driven, and the quality of excited signal performance will affect the precision of the test index of whole system.Sinusoidal excited signal
Generation mainly have three kinds of modes：Sinusoidal oscillation circuit, sinusoidal excitatory integrated chip, SPWM and numeral that i.e. analog device is built
Modulation technique.However, there is different degrees of defect, i.e. sinusoidal oscillation circuit signal stabilization in the sine wave signal of three types
The poor, distortion factor of property is high；Sinusoidal excitatory integrated chip signal amplitude regulation needs programming realization and price is sufficiently expensive；SPWM and numeral
The stability of modulation technique output waveform is directly proportional to the resource consumed on piece, and signal imitation demodulation is more difficult.
In consideration of it, many scholars are modulated process by the way of interface circuit to signal, to reach rotary transformer
Excitatory requirement.Existing rotating transformer exciting signal processing circuit single function, it is impossible to while realizing that signal amplitude is adjustable
Property, stability of waveform, anti-interference and impedance matching.
Utility model content
The purpose of this utility model is to provide one kind meet signal amplitude adjustability while, and enhancing signal is stablized
Property and anti-interference, lifted output power of circuit and meet late-class circuit impedance matching demand rotating transformer exciting signal
Modulation circuit.
For achieving the above object, this utility model employs technical scheme below：A kind of rotating transformer exciting signal is adjusted
Circuit processed, including sine-wave oscillator, its outfan are mutually coupled with the input of anti-phase proportional amplifier, anti-phase proportional amplifier
Outfan be coupled to the input of second order passive low ventilating filter, the outfan of second order passive low ventilating filter is coupled directly to
The input of voltage follower, the outfan of voltage follower are the outfan of rotating transformer exciting signal modulation circuit.
The anti-phase proportional amplifier includes operational amplifier N1, resistance R1, resistance R2 and potentiometer R3, operational amplifier
The in-phase input end of N1 is connected with one end of resistance R2, another termination simulation ground of resistance R2, and operational amplifier N1's is anti-phase defeated
One end connection of input resistance R1, the outfan of another termination sine-wave oscillator of R1；Operational amplifier N1's is anti-phase
Input is connected with one end of potentiometer R3, and the other end of potentiometer R3 is connected with the outfan of operational amplifier N1, and computing is put
Outfan of the outfan of big device N1 as anti-phase proportional amplifier, the operational amplifier N1 adopt LM124 chips.
Described second order passive low ventilating filter includes electric capacity C1, electric capacity C2, resistance R4 and resistance R5, the anti-phase ratio
The outfan of amplifier is connected with one end of resistance R4, and the other end of resistance R4 is connected with one end of resistance R5, electric capacity C1 respectively,
The other end of electric capacity C1 accesses simulation ground, the other end of resistance R5 one end respectively with electric capacity C2, the input of voltage follower
It is connected, the other end of electric capacity C2 accesses simulation ground.
The voltage follower includes operational amplifier N2, resistance R6, resistance R7 and potentiometer R8, operational amplifier N2's
In-phase input end is connected with one end of resistance R6, the outfan of another termination second order passive low ventilating filter of resistance R6,
The inverting input of operational amplifier N2 is connected with one end of resistance R7, the other end of resistance R7 and the output of operational amplifier N2
End connection, the outfan of operational amplifier N2 are connected with one end of potentiometer R8, and the other end of potentiometer R8 is used as rotation transformation
The outfan of device excited signal modulation circuit, the operational amplifier N2 adopt LM124 chips.
The sine-wave oscillator adopts integrated chip AD2S99 or RC bridge oscillator circuits.
The electric capacity C1, electric capacity C2 adopt chip ceramic capacitor.
As shown from the above technical solution, the utility model has the advantage of：First, using anti-phase proportional amplifier, its tool
There is relatively low common mode rejection ratio, circuit anti-interference ability is strong；Second, the gain of operational amplifier is progressively adjusted by potentiometer,
And then changing signal amplitude, control method is convenient；3rd, the output impedance of modulation circuit is adjusted by potentiometer, to reach
The purpose of late-class circuit impedance matching；4th, circuit structure is simple, reliable operation, cost few using part category and quantity
It is low, the demand under various environmental conditions can be met.
Description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Specific embodiment
As shown in figure 1, a kind of rotating transformer exciting signal modulation circuit, including sine-wave oscillator 1, its outfan with
The input of anti-phase proportional amplifier 2 is mutually coupled, and the outfan of anti-phase proportional amplifier 2 is coupled to second order passive low ventilating filter
3 input, the outfan of second order passive low ventilating filter 3 are coupled directly to the input of voltage follower 4, voltage follower
Outfan of 4 outfan for rotating transformer exciting signal modulation circuit.The sine-wave oscillator 1 adopts integrated chip
AD2S99 or RC bridge oscillator circuits.
As shown in figure 1, the anti-phase proportional amplifier 2 includes operational amplifier N1, resistance R1, resistance R2 and potentiometer
The in-phase input end of R3, operational amplifier N1 is connected with one end of resistance R2, another termination simulation ground of resistance R2, operation amplifier
One end connection of the inverting input resistance R1 of device N1, the outfan of another termination of R1 sine-wave oscillator 1；Computing is put
The inverting input of big device N1 is connected with one end of potentiometer R3, the other end of potentiometer R3 and the outfan of operational amplifier N1
It is connected, the outfan of the outfan of operational amplifier N1 as anti-phase proportional amplifier 2, the operational amplifier N1 are adopted
LM124 chips.
As shown in figure 1, described second order passive low ventilating filter 3 includes electric capacity C1, electric capacity C2, resistance R4 and resistance R5,
The outfan of the anti-phase proportional amplifier 2 is connected with one end of resistance R4, the other end of resistance R4 respectively with resistance R5, electric capacity
One end of C1 is connected, and the other end of electric capacity C1 accesses simulation ground, the other end of resistance R5 one end respectively with electric capacity C2, voltage with
It is connected with the input of device 4, the other end of electric capacity C2 accesses simulation ground.The electric capacity C1, electric capacity C2 adopt chip ceramic capacitor.
As shown in figure 1, the voltage follower 4 includes operational amplifier N2, resistance R6, resistance R7 and potentiometer R8, fortune
The in-phase input end for calculating amplifier N2 is connected with one end of resistance R6, another termination second order passive low-pass filter of resistance R6
The outfan of device 3, the inverting input of operational amplifier N2 are connected with one end of resistance R7, and the other end and the computing of resistance R7 are put
The outfan connection of big device N2, the outfan of operational amplifier N2 are connected with one end of potentiometer R8, the other end of potentiometer R8
Used as the outfan of rotating transformer exciting signal modulation circuit, the operational amplifier N2 adopts LM124 chips.
Operation principle of the present utility model is as follows：Sine-wave oscillator 1 exports excitation signal, and excitation signal is through resistance R1
Input operational amplifier N1, is amplified process using anti-phase proportional amplifier 2, and is adjusted by potentiometer R3 to excitation signal
Amplification；Amplify signal after 3 Filtering Processing of second order passive low ventilating filter, input operational amplifier N2, using voltage
The adjustment output impedance of follower 4, the output for increasing circuit, to lift its load capacity, operational amplifier N1, operation amplifier
The rated operational voltage of device N2 is positive and negative 12V.
In sum, adjustability, anti-interference of this utility model using 2 promotion signal amplitude of anti-phase proportional amplifier；
3 Eliminate highter harmonic signal of second order passive low ventilating filter is introduced, strengthens output waveform stability；Carried by voltage follower 4
The load capacity of high circuit, meets the impedance matching demand of late-class circuit.
Claims (6)
1. a kind of rotating transformer exciting signal modulation circuit, it is characterised in that：Including sine-wave oscillator（1）, its outfan
With anti-phase proportional amplifier（2）Input mutually couple, anti-phase proportional amplifier（2）Outfan be coupled to second order passive low pass
Wave filter（3）Input, second order passive low ventilating filter（3）Outfan be coupled directly to voltage follower（4）Input
End, voltage follower（4）Outfan for rotating transformer exciting signal modulation circuit outfan.
2. rotating transformer exciting signal modulation circuit according to claim 1, it is characterised in that：The anti-phase ratio is put
Big device（2）Including operational amplifier N1, resistance R1, resistance R2 and potentiometer R3, in-phase input end and the electricity of operational amplifier N1
One end connection of resistance R2, another termination simulation ground of resistance R2, one end of the inverting input resistance R1 of operational amplifier N1 connects
Connect, another termination sine-wave oscillator of R1（1）Outfan；The inverting input of operational amplifier N1 and potentiometer R3
One end connection, the other end of potentiometer R3 is connected with the outfan of operational amplifier N1, the outfan work of operational amplifier N1
For anti-phase proportional amplifier（2）Outfan, the operational amplifier N1 adopt LM124 chips.
3. rotating transformer exciting signal modulation circuit according to claim 1, it is characterised in that：Described second order is passive
Low pass filter（3）Including electric capacity C1, electric capacity C2, resistance R4 and resistance R5, the anti-phase proportional amplifier（2）Outfan with
One end connection of resistance R4, the other end of resistance R4 are connected with one end of resistance R5, electric capacity C1 respectively, another termination of electric capacity C1
Enter simulation ground, the other end of resistance R5 one end respectively with electric capacity C2, voltage follower（4）Input be connected, electric capacity C2's
The other end accesses simulation ground.
4. rotating transformer exciting signal modulation circuit according to claim 1, it is characterised in that：The voltage follower
（4）Including operational amplifier N2, resistance R6, resistance R7 and potentiometer R8, in-phase input end and the resistance R6 of operational amplifier N2
One end connection, another termination second order passive low ventilating filter of resistance R6（3）Outfan, operational amplifier N2's is anti-
Phase input is connected with one end of resistance R7, and the other end of resistance R7 is connected with the outfan of operational amplifier N2, operation amplifier
The outfan of device N2 is connected with one end of potentiometer R8, and the other end of potentiometer R8 is used as rotating transformer exciting signal modulation electricity
The outfan on road, the operational amplifier N2 adopt LM124 chips.
5. rotating transformer exciting signal modulation circuit according to claim 1, it is characterised in that：The sine-wave oscillation
Device（1）Using integrated chip AD2S99 or RC bridge oscillator circuits.
6. rotating transformer exciting signal modulation circuit according to claim 3, it is characterised in that：The electric capacity C1, electricity
Hold C2 and adopt chip ceramic capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621076218.6U CN206077337U (en) | 2016-09-23 | 2016-09-23 | A kind of rotating transformer exciting signal modulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621076218.6U CN206077337U (en) | 2016-09-23 | 2016-09-23 | A kind of rotating transformer exciting signal modulation circuit |
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| Publication Number | Publication Date |
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| CN206077337U true CN206077337U (en) | 2017-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621076218.6U Active CN206077337U (en) | 2016-09-23 | 2016-09-23 | A kind of rotating transformer exciting signal modulation circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108123904A (en) * | 2017-11-28 | 2018-06-05 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | A kind of communication bus impedance auto-match device and method |
| CN108134544A (en) * | 2018-01-24 | 2018-06-08 | 东方久乐汽车电子（上海）股份有限公司 | A kind of brushless motor rotary transformer driving circuit |
| CN108880690A (en) * | 2018-06-22 | 2018-11-23 | 上海仪电物理光学仪器有限公司 | A kind of Faraday modulation device circuit of automatic polarimeter |
| CN111800108A (en) * | 2020-07-01 | 2020-10-20 | 浙江大学 | Evaluation and suppression method for electromagnetic interference noise of rotary transformer |
-
2016
- 2016-09-23 CN CN201621076218.6U patent/CN206077337U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108123904A (en) * | 2017-11-28 | 2018-06-05 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | A kind of communication bus impedance auto-match device and method |
| CN108134544A (en) * | 2018-01-24 | 2018-06-08 | 东方久乐汽车电子（上海）股份有限公司 | A kind of brushless motor rotary transformer driving circuit |
| CN108134544B (en) * | 2018-01-24 | 2024-01-30 | 东方久乐汽车电子（上海）股份有限公司 | Driving circuit of rotary transformer of brushless motor |
| CN108880690A (en) * | 2018-06-22 | 2018-11-23 | 上海仪电物理光学仪器有限公司 | A kind of Faraday modulation device circuit of automatic polarimeter |
| CN108880690B (en) * | 2018-06-22 | 2024-10-01 | 上海仪电物理光学仪器有限公司 | Faraday modulator circuit of automatic polarimeter |
| CN111800108A (en) * | 2020-07-01 | 2020-10-20 | 浙江大学 | Evaluation and suppression method for electromagnetic interference noise of rotary transformer |
| CN111800108B (en) * | 2020-07-01 | 2022-03-25 | 浙江大学 | Evaluation and suppression method for electromagnetic interference noise of rotary transformer |
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