CN106953557A - Rotary transformer converter, signals of rotating transformer acquisition system and acquisition method - Google Patents
Rotary transformer converter, signals of rotating transformer acquisition system and acquisition method Download PDFInfo
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- CN106953557A CN106953557A CN201710161366.0A CN201710161366A CN106953557A CN 106953557 A CN106953557 A CN 106953557A CN 201710161366 A CN201710161366 A CN 201710161366A CN 106953557 A CN106953557 A CN 106953557A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
- H02P6/18—Circuit arrangements for detecting position without separate position detecting elements
Abstract
The present invention provides a kind of rotary transformer converter, signals of rotating transformer acquisition system and acquisition method, belongs to electric machine controller field.Rotary transformer converter of the present invention includes the mutually isostructural rotation varying signal acquisition process circuit of two-way, the rotation varying signal acquisition process circuit includes structure identical sinusoidal signal processing module and cosine signal processing module, the sinusoidal signal processing module includes the difference amplifier set according to signal transacting direction, multiplier, low pass filter, the input of the multiplier is connected with the output end of difference amplifier and excitation output signal, the input of the difference amplifier is connected with the differential pair sine or the positive and negative simulation input pin of cosine of rotary transformer converter respectively, the low pass filter exports sinusoidal or cosine signal by sinusoidal or cosine output pin.The present invention has two sets of coding/decoding methods, with redundancy, disclosure satisfy that functional safety；Reduce using the special decoding chip purchased, effectively reduce hardware cost.
Description
Technical field
The present invention relates to electric machine controller field, more particularly to a kind of rotary transformer converter, further relate to one kind and include
The signals of rotating transformer acquisition system and acquisition method of the rotary transformer converter.
Background technology
In new energy vehicle, electric machine controller is exactly mainly to realize that the control to motor, and motor constitute a power
System, accurate output torque.
Rotary transformer applies in motion servo control system, mainly makees the measurement of angle of rotor of motor position, simultaneously
Rotating speed and the angle of rotor position of motor can also be detected.
The signal of rotary transformer is, it is necessary to which the electric signal that a converter goes to drive and output it is converted to numeral
Angles and positions signal.
At present on the market, now with converter have two schemes：
(1) ADI AD2S1210 or rubs the series such as the AU6802 in river more；
The series such as AU6802 of AD2S1210 or Duo Mo rivers company of ADI companies is to use Closed loop track principle by angle position
Confidence Direct Digital is exported.Such a scheme need to take microcontroller hardware resource in sample motor rotor angular position signal
Too much, 10 I/O and SPI modules are at least taken.In addition such chip excessively complexity equivalent to a microcontroller, it is necessary to
Crystal oscillator, analog- and digital- power supply.And such core does not have Redundancy Design, if used in making traction electric machine on New-energy electric vehicle
Rotor angular position detection security reliability is not enough.Other such chip price is more expensive, volume production price at 15 dollars or so, for
There is huge cost pressure in the industrial products and automobile electronics for pursuing high economic benefit.
(2) directly with the A/D module of microcontroller, collection rotary transformer output high-frequency signal progress processing scheme.
Processing scheme directly is carried out with the A/D module collection rotary transformer output high-frequency signal of microcontroller, is taken too many
Microcontroller software resource, do not applied to for the electric machine control system for needing quick response, this scheme needs a lot in addition
Individual devices, on the critical component such as traction electric machine control system being unsafe with electric automobile.
The content of the invention
To solve the problems of the prior art, the present invention provides a kind of rotary transformer converter, also provides one kind and includes
The signals of rotating transformer acquisition system of the rotary transformer converter, also provides a kind of based on the signal acquiring system
Signal acquisition method.
Rotary transformer converter of the present invention includes the mutually isostructural rotation varying signal acquisition process circuit of two-way, and the rotation becomes
Signal acquisition processing circuit include sinusoidal signal processing module and cosine signal processing module, the sinusoidal signal processing module and
Cosine signal processing module structure is identical, and the sinusoidal signal processing module includes difference amplifier, multiplier, LPF
Device, the input of the multiplier is connected with the output end of difference amplifier and excitation output signal, the output of the multiplier
End is connected with the input of low pass filter, the difference of the input of the difference amplifier respectively with rotary transformer converter
The sinusoidal or positive and negative simulation input pin of cosine is connected, the low pass filter exports sinusoidal by sinusoidal or cosine output pin
Or cosine signal.
The present invention is further improved, and the rotary transformer converter also includes producing excitation rotary transformer output letter
Number oscillating circuit.
The present invention is further improved, and the oscillating circuit includes peripheral adjusting module and excitation module, and the periphery is adjusted
Mould preparation block includes resistance R1, the electric capacity C1 being connected between the RT pins of the rotary transformer converter and CT pins, and/or
Resistance R2 and electric capacity C2 in parallel, resistance R2 and electric capacity C2 other ends ground connection, the excitation module include diode D1, diode
D2, resistance R3, resistance R4, resistance R5, amplifier A1, the output end of excitation module connect rotary transformer by amplifier A2 respectively
The EXC pins of converter and/EXC pins, the amplifier A2 inputs respectively with RT pins, resistance R3 one end, diode D1
Positive pole, diode D2 negative poles, amplifier A1 output ends are connected, and the resistance R3 other ends, diode D1 negative poles, diode D2 are just
Pole connects amplifier A1 inverting inputs and resistance R5 one end by resistance R4 respectively, and the resistance R5 is grounded anotherly, described to put
Big device A1 inputs termination CT pins in the same direction.
The present invention is further improved, the difference amplifier include amplifier A3, resistance Ri1, resistance Ri2, resistance Rf,
Resistance Rref, the amplifier A3 positive input difference connecting resistance Ri2 and resistance Rref one end, the amplifier A3's is anti-
Mutually input terminating resistor Ri1 and resistance Rf one end, resistance Ri2 and resistance the Ri1 other end connect respectively a pair it is sinusoidal or remaining
String input signal, the output end of another termination amplifier A3 of resistance Rf, another termination reference voltages of resistance Rref.
The present invention is further improved, and the low pass filter includes resistance Ra, resistance Rb, resistance Rc, resistance Rd, electric capacity
Ca, electric capacity Cb, amplifier A4, the resistance Ra mono- terminate multiplier outputs, and the resistance Ra distinguishes connecting resistance Rb anotherly
With resistance Cb one end, the amplifier A4 positive inputs difference connecting resistance Rb other ends and electric capacity Ca one end, electric capacity Ca are another
End ground connection, the amplifier A4 inverting inputs difference connecting resistance Rd and resistance Rc one end, the resistance Rc other ends ground connection, institute
Amplifier A4 output ends difference connecting resistance Rd is stated with the electric capacity Cb other ends with sinusoidal or cosine output pin to be connected.
The present invention also provides a kind of signals of rotating transformer acquisition system for including the rotary transformer converter, also wraps
MCU processors are included, the input and rotary transformer of the rotation varying signal acquisition process circuit of the rotary transformer converter are defeated
Go out end to be connected, the output end of the rotation varying signal acquisition process circuit is connected with MCU processors.
The present invention is further improved, the rotary transformer converter integrated oscillator circuit, the oscillating circuit output
Multiplier input of the end respectively with rotary transformer input and rotation varying signal acquisition process circuit is connected.
The present invention also provides a kind of signal acquisition method based on the signal acquiring system, comprises the following steps：
S1：Oscillating circuit produces pumping signal excitation rotary transformer；
S2：Output signal of rotary transformer is carried out differential transformation by difference amplifier, is changed into it and change over the ground just
Signal；
S3：Signal after multiplier converts difference amplifier does multiplication with pumping signal, obtains changing with rotor
Just, cosine low frequency signal and containing pumping signal high-frequency signal superposition signal；
S4：Low pass filter does low-pass filtering treatment to the obtained signals of step S3；
S5：The processing of MCU processors obtains angle of rotor of motor position.
The present invention is further improved, in step S5, and the processing method of the MCU processors comprises the following steps：
S51：The signal for revolving varying signal acquisition process circuit output to two-way respectively carries out AD conversions；
S52：Two paths of data carries out the calculating of angle value；
S53：Data processing is carried out to two angle values；
S54：Obtain angle of rotor of motor positional value.
Compared with prior art, the beneficial effects of the invention are as follows：Two sets of coding/decoding methods, with redundancy, disclosure satisfy that function
Safety；Reduce using the special decoding chip purchased, effectively reduce hardware cost, integrated circuit price is low, it is only necessary to 20 yuan of people
People's coin.Decoded using software, it is further cost-effective.
Brief description of the drawings
Fig. 1 is motor and control system entire block diagram；
Fig. 2 is rotary transformer converter circuit schematic diagram of the present invention；
Fig. 3 is that Fig. 1 partial enlarged drawings, specially motor and rotation become principle block topology；
Fig. 4 is MCU processor process charts.
Embodiment
The present invention is described in further details with reference to the accompanying drawings and examples.
As shown in figure 1, the signals of rotating transformer acquisition system of the present invention, including rotary transformer converter (referred to as turn
Parallel operation) and MCU processors, input and the rotation transformation of the rotation varying signal acquisition process circuit of the rotary transformer converter
Device output end is connected, and the output end of the rotation varying signal acquisition process circuit is connected with MCU processors, and the MCU processors are defeated
Go out angle of rotor of motor positional value to follow-up output processing and its control circuit.The rotary transformer converter of this example is integrated to shake
Circuit is swung, the output end of oscillating circuit is connected with rotary transformer input respectively, the rotary transformer for encouraging motor.
As shown in Fig. 2 the rotary transformer converter of this example includes the mutually isostructural rotation varying signal acquisition process electricity of two-way
Road, the rotation varying signal acquisition process circuit includes sinusoidal signal processing module and cosine signal processing module, the sinusoidal letter
Number processing module is identical with cosine signal processing module structure, and the sinusoidal signal processing module includes difference amplifier 2, multiplication
Device 3, low pass filter 4, the input of the multiplier 3 are connected with the output end and excitation output signal of difference amplifier 2, institute
The output end for stating multiplier 3 is connected with the input of low pass filter 4, the input of the difference amplifier 2 respectively with rotation
The differential pair of transformer converter is sinusoidal or the positive and negative simulation input pin of cosine is connected, the low pass filter 4 by sinusoidal or
Cosine output pin output sine or cosine signal.The rotary transformer converter of this example also includes producing excitation rotary transformer
The oscillating circuit 1 of output signal.
The operation principle of this example is：Rotary transformer pumping signal, rotation are produced using the oscillating circuit 1 with fixed ampllitude link
Transformer output signal does multiplication after the differential amplification of difference amplifier 2 with pumping signal, is changed into from the output signal of multiplier 3
High and low frequency superposed signal.This signal filters high-frequency signal by low pass filter 4 again, becomes what is changed containing only rotor angle
Low frequency cosine and sine signal.Using this low frequency cosine and sine signal of AD (analog-to-digital conversion) module samples of MCU processors, electricity is then calculated
Machine rotor angle position.
The present invention uses simple general-purpose circuit structure, and whole chip integration is not high, can make asic chip, make economy
Improve.Simple circuit structure improves reliability simultaneously, in order to which it is used in the keys such as electric automobile traction electric machine control system
On part, the design revolves the Redundancy Design of varying signal change-over circuit using two-way, and reliability is high.And the present invention with now with skill
Art is compared, and cost is very low, and circuit is all that, using conventional chip, circuit is cheap, and whole circuit only needs to 20 yuans.
15 dollars of price compared with prior art, with very big cost advantage.
Also, motor angle position signalling is very crucial in motor control system of electric automobile, and this example is using superfluous
Remaining design, it is ensured that the accuracy of signal, signal all the way it is faulty or damage in the case of, appoint can so ensure system
Normal work.The present invention rotary transformer converter with the method for economic and reliable solve well rotary transformer driving and
The problem of signal is changed.
The rotary transformer converter pin of this example is defined as follows：
RT、CT：Frequency of oscillation sets pin；
EXC、Driving frequency and complementary driving frequency；
COS1_S1、COS2_S1：The positive simulation input of differential pair cosine；
COS1_S3、COS2_S3：Differential pair cosine negative analog is inputted；
SIN1_S2、SIN2_S2：The sinusoidal positive simulation input of differential pair；
SIN1_S4、SIN2_S4：Differential pair sine negative analog input；
COS1、COS2：Cosine is exported；
SIN1、SIN2：Sine output；
Vdd：The positive pin of power supply；
Vss：Power supply bears pin.
The oscillating circuit 1 of this example includes peripheral adjusting module and excitation module, and the peripheral adjusting module includes being connected on
Resistance R1, electric capacity C1 between the RT pins and CT pins of the rotary transformer converter, and/or resistance R2 and electricity in parallel
Hold C2, resistance R2 and electric capacity the C2 other end ground connection, the excitation module includes diode D1, diode D2, resistance R3, resistance
R4, resistance R5, amplifier A1, encourage the output end of module to be managed respectively by the amplifier A2 EXC for connecing rotary transformer converter
Pin and/EXC pins, the amplifier A2 inputs respectively with RT pins, resistance R3 one end, diode D1 positive poles, diode D2
Negative pole, amplifier A1 output ends are connected, and the resistance R3 other ends, diode D1 negative poles, diode D2 positive poles pass through electricity respectively
Resistance R4 connects amplifier A1 inverting inputs and resistance R5 one end, and the resistance R5 is grounded anotherly, and the amplifier A1 is defeated in the same direction
Enter to terminate CT pins.The present invention in converter periphery by connecing RC circuits, you can excitation frequency is adjusted by adjusting R1, C1 value
Rate, can also adjust driving frequency by adjusting R2, C2 value.
Cosine signal processing module input one differential pair of termination of the first via rotation varying signal acquisition process circuit of this example
The positive simulation input COS1_S1 pins of cosine and a differential pair cosine negative analog input COS1_S3 pin, from two pin difference
The amplifier unit that two resistance enter difference amplifier is connect, specifically, the first via revolves the cosine of varying signal acquisition process circuit
The difference amplifier of signal processing module includes amplifier A3, resistance Ri1, resistance Ri2, resistance Rf1, resistance Rref1, described to put
Big device A3 positive input difference connecting resistance Ri2 and resistance Rref1 one end, the anti-phase input terminating resistor of the amplifier A3
Ri1 and resistance Rf1 one end, resistance Ri2 and resistance the Ri1 other end connect a pair of sinusoidal or cosine input signals, institute respectively
State another termination amplifier A3 of resistance Rf1 output end, another termination reference voltages of resistance Rref1.The cosine signal
Processing module output termination cosine output COS1 pins.
The low pass filter of the cosine signal processing module of this example first via rotation varying signal acquisition process circuit includes resistance
Ra1, resistance Rb1, resistance Rc1, resistance Rd1, electric capacity Ca1, electric capacity Cb1, amplifier A4, the resistance Ra1 mono- terminate multiplier
K1 output ends, the resistance Ra1 distinguishes connecting resistance Rb1 and resistance Cb1 one end, the amplifier A4 positive inputs point anotherly
The other connecting resistance Rb1 other ends and electric capacity Ca1 one end, electric capacity Ca1 other ends ground connection, the amplifier A4 inverting inputs connect respectively
Resistance Rd1 and resistance Rc1 one end, resistance Rc1 other ends ground connection, the amplifier A4 output ends difference connecting resistance Rd1 and
The electric capacity Cb1 other ends are connected with cosine output pin.
Sinusoidal signal processing module input one differential pair of termination of first via rotation varying signal acquisition process circuit is sinusoidal just
Simulation input SIN1_S2 pins and the sinusoidal negative analog input SIN1_S4 pins of a differential pair, internal structure and annexation are same
Cosine signal processing module, the sinusoidal output SIN1 pins of sinusoidal signal processing module output termination.
This example uses Redundancy Design, sets two line structure identicals to revolve varying signal acquisition process circuit, therefore, two is exported altogether
Group sine and cosine data.
The signal acquisition method of the rotary transformer of this example is identical because of two-way processing method, therefore is adopted with first via signal
Illustrated exemplified by diversity method.This example signal acquisition method comprises the following steps：
Step S1：Oscillating circuit produces pumping signal excitation rotary transformer.The pumping signal that this converter circuit is produced,
The pumping signal is the oscillator signal of certain frequency, such as frequency is 10K, 20K, 7.5KHz etc., after power amplification, and
After filtering, the Exciting Windings for Transverse Differential Protection of the rotary transformer outside direct drive controller.
Driving frequency computing formula is：Wherein, f0For driving frequency, unit is conspicuous magnetic Hz, it is seen then that swashed
The value and resistance R1 and electric capacity C1 value for encouraging frequency are negatively correlated, and herein, R1 and C1 in formula could alternatively be R2 and C2.
Excitation winding output electric signal formula be：Vr=Vp× sinwt, wherein, VrFor excitation output signal, unit
For volt V；VpFor excitation range signal, unit is volt V, and the parameter that its amplitude size produced has component is determined, it can be assumed that
Vp is a constant, and this example determines size by VCC power supplys, R1, C1 etc.；Sin ω t are the frequency relation of pumping signal；ω is frequency
The angular speed of rate, the relation with f0 is：ω=2* π * f0, that is, frequency and arc angle relational expression.
As shown in figure 3, being cosine winding between this example S1 and S3, it is sine windings between S2 and S4, is between R1 and R3
Exciting Windings for Transverse Differential Protection.
This example cosine winding output electric signal computing formula be：
Vi=Vr*Hd=Vp*sin ω t*Hd, wherein, Vr- excitation output signal, unit is volt V；Hd becomes for rotation
The no-load voltage ratio of depressor, generally 0.286；Vi is cosine winding output signal, and unit is volt V.
The calculation of sinusoidal signal is ibid.
Step S2：Output signal of rotary transformer is carried out differential transformation by difference amplifier, is changed into it and is changed over the ground
Positive signal；Such as, first via cosine signal is transformed to Va outputs by difference amplifier 2 by Vi, and sinusoidal signal is by poor
Amplifier 2 is divided to be transformed to Vb outputs by Vi.
Step S3：Signal after multiplier converts difference amplifier does multiplication with pumping signal, obtains with rotor
Change just, cosine low frequency signal and containing pumping signal high-frequency signal superposition signal；
Output signal of rotary transformer is after differential transformation：
Va=Vr× cos θ, Vb=Vr×sinθ
Formula in step S1 is substituted into above-mentioned formula, obtained：
Cosine signal：Va=Vs× sin wt × cos θ,
Sinusoidal signal：Vb=Vs×sin wt×sinθ
Sinusoidal signal and cosine signal, excitation signal multiplication respectively, this example realize one equivalent to using the multiplier of hardware
As software algorithm function.Compared with the prior art, low cost, is handled relatively reliable.
Finally, obtain the sinusoidal of multiplier is with cosine output signal：
Wherein, VakContain cosine signal for what multiplier K1 was exported, unit is volt V；VbkContain sine for what multiplier K2 was exported
Signal, unit is volt V；θ is angle of rotor of motor.
Step S4：Low pass filter 4 does low-pass filtering treatment to the obtained signals of step S3, filters high-frequency signal, becomes
Containing only the sine and cosine low frequency signal changed with rotor.Then the two signals feeding MCU controllers can be asked readily
Solve angle of rotor of motor positional value.
R in converteri、Rref、Rf、Rc、RdFor gain resistor, in engineering, the situation of classical insulation is being met
Under, it is general to use identical parameter, it is easy to Project Realization.
When converter output signal peak-to-peak value is 4VP-PWithin when, output signal is 0-3V, can be sent directly into MCU processing
The A/D module of device.Certainly, certainly specific parameter can be adjusted according to the input range of the ADC except chip.
Step S5：The processing of MCU processors obtains angle of rotor of motor position.
As shown in figure 4, when above-mentioned 2 road signals of rotating transformer, after the hardware circuits which process of converter, will send into
ADC (analog-digital converter) port of dsp chip carries out AD conversion processings, and 2 group of 4 tunnel rotation varying signal of this example is by ADC's
After analog-to-digital conversion, it is possible to be changed into 0~4095 digital quantity.
Data value after AD is converted, represents the voltage data amount (0~4095) of cos θ, sin θ respectively, then they
The two is divided by, it is possible to obtains tangent θ data values, then takes the mode of software checking book, finds corresponding rotor angular position
Value θ.
The present invention has a two road hardware signals, every group have cosine and sine signal digital quantity, employ identical software
Processing method, that is, the computational methods of software also have redundancy, it can be ensured that fail all the way, work all the way in addition, verify each other,
Use each other.The ASIL C of ISO26262 standards functional requirement can thus be met.
The embodiment of the above is the better embodiment of the present invention, not limits the specific of the present invention with this
Practical range, the scope of the present invention includes being not limited to present embodiment, all equal according to the equivalence changes of the invention made
Within the scope of the present invention.
Claims (9)
1. rotary transformer converter, it is characterised in that：It is described including the mutually isostructural rotation varying signal acquisition process circuit of two-way
Revolving varying signal acquisition process circuit includes sinusoidal signal processing module and cosine signal processing module, and the sinusoidal signal handles mould
Block is identical with cosine signal processing module structure, and the sinusoidal signal processing module includes difference amplifier, multiplier, low pass filtered
Ripple device, the input of the multiplier is connected with the output end of difference amplifier and excitation output signal, the multiplier it is defeated
Go out end with the input of low pass filter to be connected, the difference of the input of the difference amplifier respectively with rotary transformer converter
Divide and the sinusoidal or positive and negative simulation input pin of cosine is connected, the low pass filter is exported just by sinusoidal or cosine output pin
String or cosine signal.
2. rotary transformer converter according to claim 1, it is characterised in that：The rotary transformer converter is also wrapped
Include the oscillating circuit for producing excitation output signal of rotary transformer.
3. rotary transformer converter according to claim 2, it is characterised in that：The oscillating circuit includes periphery and adjusted
Module and excitation module, the peripheral adjusting module include the RT pins and CT pins for being connected on the rotary transformer converter
Between resistance R1, electric capacity C1, and/or in parallel resistance R2 and electric capacity C2, resistance R2 and electric capacity C2 other ends ground connection are described to swash
Encouraging module includes diode D1, diode D2, resistance R3, resistance R4, resistance R5, amplifier A1, the output end point of excitation module
By amplifier A2 do not connect rotary transformer converter EXC pins and/EXC pins, the amplifier A2 inputs respectively with
RT pins, resistance R3 one end, diode D1 positive poles, diode D2 negative poles, amplifier A1 output ends are connected, and the resistance R3 is another
End, diode D1 negative poles, diode D2 positive poles connect amplifier A1 inverting inputs and resistance R5 one end, institute by resistance R4 respectively
State resistance R5 to be grounded anotherly, the amplifier A1 inputs termination CT pins in the same direction.
4. the rotary transformer converter according to Claims 2 or 3, it is characterised in that：The difference amplifier includes putting
Big device A3, resistance Ri1, resistance Ri2, resistance Rf, resistance Rref, the amplifier A3 positive input difference connecting resistance Ri2
With resistance Rref one end, anti-phase input terminating resistor Ri1 and resistance Rf one end of the amplifier A3, the resistance Ri2 and electricity
The resistance Ri1 other ends connect a pair of sinusoidal or cosine input signals respectively, the output end of another termination amplifier A3 of resistance Rf,
Another termination reference voltages of resistance Rref.
5. the rotary transformer converter according to Claims 2 or 3, it is characterised in that：The low pass filter includes electricity
Hinder Ra, resistance Rb, resistance Rc, resistance Rd, electric capacity Ca, electric capacity Cb, amplifier A4, the terminations of the resistance Ra mono- multiplier output
End, the resistance Ra distinguishes connecting resistance Rb and resistance Cb one end anotherly, and the amplifier A4 positive inputs distinguish connecting resistance
The Rb other ends and electric capacity Ca one end, electric capacity Ca other ends ground connection, the amplifier A4 inverting inputs difference connecting resistance Rd and electricity
Hinder Rc one end, the resistance Rc other ends ground connection, the amplifier A4 output ends difference connecting resistance Rd and the electric capacity Cb other ends and
Sinusoidal or cosine output pin is connected.
6. signals of rotating transformer acquisition system, it is characterised in that：It is described including rotary transformer converter and MCU processors
The input of the rotation varying signal acquisition process circuit of rotary transformer converter is connected with rotary transformer output end, and the rotation becomes
The output end of signal acquisition processing circuit is connected with MCU processors.
7. signals of rotating transformer acquisition system according to claim 6, it is characterised in that：The rotary transformer conversion
Device integrated oscillator circuit, the output end of oscillating circuit respectively with rotary transformer input and rotation varying signal acquisition process circuit
Multiplier input be connected.
8. the acquisition method based on signals of rotating transformer acquisition system described in claim 7, it is characterised in that including following step
Suddenly：
S1：Oscillating circuit produces pumping signal excitation rotary transformer；
S2：Output signal of rotary transformer is carried out differential transformation by difference amplifier, it is changed into the positive signal changed over the ground；
S3：Signal and pumping signal after multiplier converts difference amplifier do multiplication, obtain with rotor change just,
Cosine low frequency signal and containing pumping signal high-frequency signal superposition signal；
S4：Low pass filter does low-pass filtering treatment to the obtained signals of step S3；
S5：The processing of MCU processors obtains angle of rotor of motor position.
9. signals of rotating transformer acquisition method according to claim 8, it is characterised in that：In step S5, at the MCU
The processing method of reason device comprises the following steps：
S51：The signal for revolving varying signal acquisition process circuit output to two-way respectively carries out AD conversions；
S52：Two paths of data carries out the calculating of angle value；
S53：Data processing is carried out to two angle values；
S54：Obtain angle of rotor of motor positional value.
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| CN107547069A (en) * | 2017-09-18 | 2018-01-05 | 苏州博牛电气有限公司 | One kind rotation becomes excited signal and system and method for generation occurs |
| CN108599664A (en) * | 2018-05-30 | 2018-09-28 | 阳光电源股份有限公司 | A kind of the motor rotor position acquisition methods and system of rotary transformer |
| CN109357698A (en) * | 2018-11-01 | 2019-02-19 | 上海开通数控有限公司 | Detection device and method for rotary transformer decoding circuit |
| CN111025190A (en) * | 2019-11-28 | 2020-04-17 | 中国航空工业集团公司西安航空计算技术研究所 | Rotary transformer signal conditioning circuit and method |
| CN111983568A (en) * | 2020-08-20 | 2020-11-24 | 南京恩瑞特实业有限公司 | Azimuth signal double-path mutual backup design |
| CN111983269A (en) * | 2020-08-05 | 2020-11-24 | 南京华士电子科技有限公司 | Signal simulator for rotation speed sensor of traction converter of monorail vehicle |
| CN114465544A (en) * | 2022-03-30 | 2022-05-10 | 重庆长安新能源汽车科技有限公司 | Rotary transformer decoding device and automobile |
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| CN107547069B (en) * | 2017-09-18 | 2024-04-09 | 苏州博牛电气有限公司 | Rotation-varying excitation signal generation system and generation method |
| CN108599664A (en) * | 2018-05-30 | 2018-09-28 | 阳光电源股份有限公司 | A kind of the motor rotor position acquisition methods and system of rotary transformer |
| US10644626B2 (en) | 2018-05-30 | 2020-05-05 | Sungrow Power Supply Co., Ltd. | Method and system for acquiring rotor position of rotary transformer |
| CN109357698A (en) * | 2018-11-01 | 2019-02-19 | 上海开通数控有限公司 | Detection device and method for rotary transformer decoding circuit |
| CN111025190A (en) * | 2019-11-28 | 2020-04-17 | 中国航空工业集团公司西安航空计算技术研究所 | Rotary transformer signal conditioning circuit and method |
| CN111025190B (en) * | 2019-11-28 | 2021-11-09 | 中国航空工业集团公司西安航空计算技术研究所 | Rotary transformer signal conditioning circuit and method |
| CN111983269A (en) * | 2020-08-05 | 2020-11-24 | 南京华士电子科技有限公司 | Signal simulator for rotation speed sensor of traction converter of monorail vehicle |
| CN111983269B (en) * | 2020-08-05 | 2023-02-10 | 南京华士电子科技有限公司 | Signal simulator for rotation speed sensor of traction converter of monorail vehicle |
| CN111983568A (en) * | 2020-08-20 | 2020-11-24 | 南京恩瑞特实业有限公司 | Azimuth signal double-path mutual backup design |
| CN114465544A (en) * | 2022-03-30 | 2022-05-10 | 重庆长安新能源汽车科技有限公司 | Rotary transformer decoding device and automobile |
| CN114465544B (en) * | 2022-03-30 | 2023-08-08 | 深蓝汽车科技有限公司 | Rotary-variable decoding device and automobile |
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