CN107547069A - One kind rotation becomes excited signal and system and method for generation occurs - Google Patents
One kind rotation becomes excited signal and system and method for generation occurs Download PDFInfo
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Abstract
Revolved the invention discloses one kind and become excited signal generation system and method for generation, it includes DSP Processor, pwm signal ripple caused by the DSP Processor is shaped to the secondary reshaping circuit of smooth sine wave, will pass through positive see-saw circuit and the inclined circuit of drawing and the one-level passive filter circuit and common mode outputting inductance T401 that are filtered to output signal that the smooth sine wave be changed into differential signal, and the angle-data module for producing sine wave is provided with the flash regions of the DSP Processor.Easily adjustment of the invention and more reliable, sampling instant is accurate, and excitatory waveform may be occurred after long-play by, which solving, drifts about, causes signal feedback sample point problem of misalignment.
Description
【Technical field】
The invention belongs to drive and control of electric machine technical field, is revolved more particularly to one kind and becomes excited signal generation system and hair
Generation method.
【Background technology】
Existing rotation becomes class feedback servo motor driver and all becomes excited signal with rotation in itself, but they are essentially all
Sine wave is produced using the Active RC bridge-type sine wave oscillation circuit of hardware type, as shown in Figure 1.Also some using it is special just
String ripple occurs chip and becomes excited signal to produce rotation, but this scheme can increase driver cost, and circuit is also more complicated, so one
As will not use.Reflected according to the practical situations of application, commissioning engineer, using excited signal caused by the above method,
The more difficult adjustment of frequency of oscillation be present, with temperature drift, adjustment process is very time-consuming, and operating process is comparatively laborious, inconvenient, especially
Be when needing to change the frequency of oscillation of excited signal, it is necessary to re-replace resistance and electric capacity related in circuit, in Fig. 1,
When conversion magnet excitation frequency, almost resistance R all in Fig. 1, electric capacity C need to change, and it is even more important be a little be difficult to protect
Card sampling rotation is exactly in the peak point of signal at the time of becoming feedback signal, the rotation for causing to sample becomes feedback signal and forbidden, entered
And may result in the motor position demodulated and forbidden, cause progress PMSM vector calculuses to have deviation, it is in particular possible to motor
Low speed influence on system operation is larger.
As circuit diagram 1 shows, although circuit plus the lock-on circuit being made up of SIN_SYN, C613, R619,
Due to hardware simulation circuit dispersiveness it is big the characteristics of, actually it is difficult to ensure that sampling rotation become feedback signal at the time of be exactly in letter
Number maximum of points.By Fig. 1 survey sampling instant and rotation become feedback signal relation it is as shown in Figure 2.In fig. 2, jaggies
For SIN_SYN signals, i.e. DSP sampling rotations become feedback at the time of point, and sinusoidal waveform becomes feedback signal for rotation.From Figure 2 it can be seen that sampling
Moment (upper jump edge, the lower jump edge of SIN_SYN signals) does not become the maximum point of feedback signal in rotation, but generation is larger
Dislocation skew (shift time △ t in such as Fig. 2), this inevitably results in the signal of sampling and the actual error that has, and it is inclined to misplace
Shifting is bigger, and error will be bigger, and then can influence to revolve the calculation result of varying signal, eventually influences the operational effect of motor.
System and method for generation occurs to solve the above problems therefore, it is necessary to provide a kind of new rotation and become excited signal.
【The content of the invention】
One of main object of the present invention be to provide it is a kind of easily, easily adjustment and more structurally sound rotation becomes excited signal
Generation system, sampling instant is accurate, and solving, excitatory waveform drift may occur after long-play, cause signal feedback to be adopted
Sampling point problem of misalignment.
The present invention is achieved through the following technical solutions above-mentioned purpose：One kind rotation becomes excited signal and system occurs, and it includes DSP
Processor, the secondary reshaping circuit that pwm signal ripple caused by the DSP Processor is shaped to smooth sine wave, institute will be passed through
State the positive see-saw circuit circuit inclined with drawing and be filtered to output signal one that smooth sine wave is changed into differential signal
Level passive filter circuit and common mode outputting inductance T401, it is provided with the flash regions of the DSP Processor and produces sine wave
Angle-data module.
Further, the secondary reshaping circuit includes the resistance R406 that first time shaping is carried out to the pwm signal ripple
The resistance R407 and electric capacity C410 of second of shaping are carried out with electric capacity C409, to the pwm signal ripple；
The resistance R406 connects with the pwm signal ripple；It is the resistance R406 output ends and the electric capacity C409, described
Resistance R407 is connected at tie point a；The output end of the resistance R407 is connected at tie point b with the electric capacity C410；Institute
State electric capacity C409 to be connected with the other end of the electric capacity C410 and there are two tie points, one of them described tie point ground connection, separately
One tie point is exported to the positive see-saw circuit.
Further, the positive see-saw circuit includes operational amplifier U401B, is arranged on the operational amplifier
The first multiplying power adjustment circuit between U401B inverting input and output end, the output end with the operational amplifier U401B
The operational amplifier U401A of connection, the second multiplying power adjustment circuit being connected with the operational amplifier U401A；The computing is put
Big device U401B in-phase input end at the tie point b with connecting；The inverting input of the operational amplifier U401A and institute
State operational amplifier U401B output end connection.
Further, the first multiplying power adjustment circuit includes resistance R415, resistance R417 and electric capacity C413, the electricity
Resistance R415 one end is connected with the electric capacity C410 and the other end is connected to tie point c with the resistance R417 and electric capacity C413
Place, the tie point c are connected with the inverting input of the operational amplifier U401B；Described resistance R417 one end and the electricity
Hold C413 to be connected at tie point d, and the tie point d is connected with the output end of the operational amplifier U401B.
Further, the second multiplying power adjustment circuit includes being arranged on the operational amplifier U401A inverting inputs
It is anti-with the resistance R408 on the connection line of the operational amplifier U401B output ends, one end and the operational amplifier U401A
Phase input connect and the other end resistance R414, the resistance R414 that are connected with the operational amplifier U401A output ends and
The operational amplifier U401A output ends are connected at tie point e.
Further, it is described draw inclined circuit include resistance R401, resistance R402 and electric capacity C403, the resistance R401 with
The electric capacity C403 is arranged in parallel and one holds ground connection jointly, and another common end is same mutually defeated with the operational amplifier U401A's
Enter end connection；Described resistance R402 one end is connected with the resistance R401 and the other end is connected with power end VCC0.
Further, the one-level passive filter circuit includes the electricity being connected with the operational amplifier U401A output ends
Hold C406, one end is connected with the electric capacity C406 output ends and the other end and the tie point d electric capacity C412 being connected and resistance
R413。
Another main purpose of the present invention is that providing a kind of rotation becomes excited signal method for generation, and it comprises the following steps,
1) one 0 °~360 °, the sinusoidal wave angle for a cycle that step pitch is K are stored in the flash regions of DSP Processor
Degrees of data module, then include Q output points, wherein Q=360/K in a complete sine wave period；
2) angle, θ exported as needed calculates the output pulse width of pwm signal ripple caused by the DSP Processor
P=sin θ/QfJ, and the output valve of sinusoidal wave PWM signal wave corresponding to ADC sampling instants is alternatively set as 90 °, 270 °；
3) the pwm signal ripple of output in step 2) is shaped as smooth sine wave rotation and becomes excited signal；
4) sine wave rotation after shaping is become anti-phase again after excited signal amplification and draws the positive and negative of oblique presentation life Symmetrical
Mutually rotation becomes excited signal；
5) excited signal is become to caused positive and negative phase rotation and is filtered processing；
6) the positive and negative phase rotation after handling after filtering becomes both excited signals and subtracted each other, and can obtain swashing for Symmetrical
Magnetic signal, i.e. differential signal.
Further, the differential signal is curbed into the high frequency that may be included in circuit by common mode outputting inductance T401
Signal.
Compared with prior art, a kind of rotation of the present invention becomes excited signal generation system and the beneficial effect of method for generation exists
In：
1) it is simple and convenient, exempt to debug, caused rotation becomes the frequency of excited signal waveform, amplitude, phase shift hardly by temperature
Influence, uniformity is very good；
2) by including the sine wave angle-data of some output points in a cycle in DSP storage insides one,
And the pwm pulse of output is calculated by the PWM pulse duty cycles of sinusoidal magnitude corresponding to PWM ripples caused by inside DSP
Width, make the not only main interrupt match with program PWM interrupt cycle, also matched with the cycle of excited signal,
So as to be exactly in the extreme point of feedback signal at the time of ensureing sampling rotation varying signal, the accurate of sampling instant ensure that；
3) pressure output sinusoidal magnitude is (at the time of i.e. main interruption circulation starts) at the time of unlatching ADC samplings every time
Angle is 90 °, 270 ° of value (i.e. the positive and negative maximum of sine wave), and field wave may occur after avoiding long-play
Shape drift, cause signal feedback sample point problem of misalignment；
4) rotation of driver caused by this programme becomes excited signal under a certain fixed frequency, without adjusting any circuit ginseng
Number, the frequency of excited signal, the uniformity of amplitude is just set to be obtained than conventional Active RC bridge-type sine wave oscillation circuit very big
Improve, and even if the frequency that rotation becomes excited signal need to be changed, it only need to change DSP and correspondingly produce the program of sine wave and somewhat change
If the resistance R or electric capacity C (such as the resistance R406 in Fig. 3, resistance R407 or electric capacity C409, electric capacity C410) of lower D/A shaping circuits
It can reach the purpose of change magnet excitation frequency.
【Brief description of the drawings】
Fig. 1 is the attachment structure schematic diagram of generation sine wave oscillation circuit commonly used in the prior art；
Fig. 2 is the timing diagram for becoming feedback signal with rotation by the sampling instant that Fig. 1 is obtained；
Fig. 3 is the circuit connection diagram of the embodiment of the present invention；
Rotation becomes SIN feedbacks, the signal of DSP sampled points waveform when Fig. 4 is a certain position in obtained 0~180 ° of section of measured drawing 3
Figure；
Rotation becomes SIN feedbacks, DSP sampled point waveforms show when Fig. 5 is a certain position in obtained 180~360 ° of sections of measured drawing 3
It is intended to；
Fig. 6 is the waveform diagram after secondary reshaping circuit shaping in the present embodiment；
Fig. 7 is positive see-saw circuit and the waveform diagram after the inclined processing of circuit of drawing in the present embodiment；
Fig. 8 is the differential excitation signal waveforms that the present embodiment obtains.
【Embodiment】
Embodiment：
Fig. 3 is refer to, the present embodiment becomes excited signal for rotation and system occurs, and it includes DSP Processor, by the DSP
Pwm signal ripple caused by reason device is shaped to the secondary reshaping circuit of smooth sine wave, will be changed into poor by the smooth sine wave
The positive see-saw circuit of sub-signal is with drawing inclined circuit and the one-level passive filter circuit being filtered to output signal together
Mould outputting inductance T401.The angle-data module for producing sine wave is provided with the flash regions of the DSP Processor.
The secondary reshaping circuit includes the resistance R406 and electric capacity that first time shaping is carried out to the pwm signal ripple
C409, the resistance R407 and electric capacity C410 that second of shaping is carried out to the pwm signal ripple；Resistance R406 and the pwm signal
Ripple connects；Resistance R406 output ends are connected at tie point a with electric capacity C409, resistance R407；Resistance R407 output end and electricity
Hold C410 to be connected at tie point b；Electric capacity C409 is connected with the electric capacity C410 other end and has two tie points, one of institute
Tie point ground connection is stated, another described tie point is exported to the positive see-saw circuit.
The positive see-saw circuit includes operational amplifier U401B, is arranged on operational amplifier U401B anti-phase input
The operational amplifier for hold the first multiplying power adjustment circuit between output end, being connected with operational amplifier U401B output end
U401A, the second multiplying power adjustment circuit being connected with operational amplifier U401A.The first multiplying power adjustment circuit includes resistance
R415, resistance R417 and electric capacity C413, resistance R415 one end is connected with electric capacity C410 and the other end and resistance R417 and electric capacity
C413 is connected at tie point c, and tie point c is connected with operational amplifier U401B inverting input；Resistance R417 one end and electricity
Hold C413 to be connected at tie point d, and tie point d is connected with operational amplifier U401B output end.Operational amplifier U401B
The connection of in-phase input end and tie point b place.The ratio between resistance R417 resistance value and resistance R415 resistance value are 1:2.Electric capacity
C413 is the weakening electric capacity of operational amplifier U401B backfeed loops.Adjusted by operational amplifier U401B first multiplying power
Circuit part carries out appropriate amplification, its multiplication factor=1+R417/R415=1.5 to signal.
Operational amplifier U401A inverting input is connected with operational amplifier U401B output end, second multiplying power
Adjustment circuit includes being arranged on operational amplifier U401A inverting inputs and the connection line of operational amplifier U401B output ends
On resistance R408, one end and the connection of operational amplifier U401A inverting inputs and the other end and operational amplifier U401A output
Hold the resistance R414 of connection.Resistance R414 is connected at tie point e with operational amplifier U401A output ends.Resistance R414 electricity
The ratio between resistance and resistance R408 resistance value are 1:1.By operational amplifier U401A and the second multiplying power adjustment circuit to even
Contact d signal carries out anti-phase amplification, multiplication factor=R414/R408=1.
Described to draw inclined circuit to include resistance R401, resistance R402 and electric capacity C403, resistance R401 is in parallel with electric capacity C403
Set and one holds ground connection jointly, another common end is connected with operational amplifier U401A in-phase input end；Resistance R402 one end
It is connected with resistance R401 and the other end is connected with power end VCC0, operational amplifier U401A power supply connection end and the power end
VCC0 connections, and shunting is provided with filter capacitor C402 on connection line.Resistance R401 resistance value and resistance R402 electricity
Drawing beat value=VCC0 × R401/ (R401+R402)=5 × 1.5/3=2.5, electric capacity C403 of the inclined circuit of drawing is described in resistance
Decoupling electric capacity.
The one-level passive filter circuit include be connected with operational amplifier U401A output ends electric capacity C406, one end and
The electric capacity C412 and resistance R413 that electric capacity C406 output ends are connected and the other end is connected with tie point d.The one-level passive filtering
The cut-off frequency of circuit is about 102.7Hz, and the purpose is to prevent low frequency signal especially power frequency component from sealing in excited signal.
Common mode outputting inductance T401 two inputs are connected respectively with resistance R413 both ends, and two output end is
Rotation becomes laser signal output end.
The present embodiment additionally provides a kind of rotation and becomes excited signal method for generation, and it comprises the following steps：
1) one 0 °~360 °, the sinusoidal wave angle for a cycle that step pitch is K are stored in the flash regions of DSP Processor
Degrees of data module, then include Q output points, wherein Q=360/K in a complete sine wave period；The present embodiment
In, the driving frequency f of pwm signal ripple caused by the DSP ProcessorQ=10KHz, rotation become magnet excitation frequency fJ=5KHz, step pitch are
K=9 °, then export points Q=40.
2) the output pulse for calculating pwm signal ripple caused by the DSP Processor of the angle, θ exported as needed is wide
Spend P=sin θ/QfJ=5sin θ, and the output valve of sinusoidal wave PWM signal wave corresponding to ADC sampling instants is alternatively set as
90°、270°.Because each complete sine wave period includes 40 output points, and this 40 data points need to correspond to rotation and become excitatory
Frequency, then the frequency for corresponding to the output of sinusoidal wave PWM signal wave is fPWM=fJQ=200KHz, so just export 20 per half cycle
Individual sine wave angle number strong point, time correspond to 20*1/200*1000=100us, corresponding 10K frequencies, sampling rotation every time is become anti-
The maximum of points of signal is exactly at the time of feedback signal.It can thus be appreciated that produce cycle T=1/ of corresponding sinusoidal wave PWM signal wave
fPWM=5us, the angle, θ that recycling to export calculate dutyfactor value ρ=sin θ of sinusoidal wave PWM signal wave, then actual angle
Output pulse width P=T ρ=5sin θ of θ output pwm signal ripples.At the time of starting to start ADC samplings every time, corresponding
The output valve of sinusoidal wave PWM signal wave be alternatively set as 90 °, 270 °, can so ensure that sampling rotation becomes feedback signal every time
At the time of point for rotation become feedback signal maximum point, by the present embodiment revolve become excited signal occur system obtain sampling instant with
Rotation becomes feedback wave shape as shown in Figure 4, Figure 5, sampling instant, the frequency of excitatory waveform and design requirement ten visible according to Fig. 4, Fig. 5
Divide and coincide.
3) the pwm signal ripple of output in step 2) will be corresponded to the PWM square waves of sine wave aperture by secondary reshaping circuit
It is shaped as smooth sine wave rotation and becomes excited signal.Revolved by the present embodiment and become described secondary whole in excited signal generation system
Waveform after the shaping that shape circuit obtains is as shown in fig. 6, the curve A in wherein Fig. 6 is first of waveform at tie point a in Fig. 3
Secondary shaping result, curve B are second of shaping result of waveform at tie point b in Fig. 3.
4) sine wave rotation after shaping is become anti-phase again after excited signal amplification and draws the positive and negative of oblique presentation life Symmetrical
Mutually rotation becomes excited signal.By amplifying and drawing waveform result to the rear as shown in fig. 7, the curve C in wherein Fig. 7 is to connect in Fig. 3
Waveform at contact d, curve D are the waveform at tie point e.
5) excited signal is become to caused positive and negative phase rotation and is filtered processing.The present embodiment rotation becomes excited signal system
By the one-level passive filter circuit being mainly made up of electric capacity C406, resistance R413, resistance C412 in system, make excitatory signal itself
Can be straightway by the way that and the signal of cut-off frequency less than this high-pass filter can be then suppressed.
6) the positive and negative phase rotation after handling after filtering becomes both excited signals and subtracted each other, and can obtain swashing for Symmetrical
Magnetic signal, i.e. differential signal.The common mode outputting inductance T401 become in excited signal generation system is revolved by the present embodiment again to suppress
The high-frequency signal that may be included in power down road, you can obtain supplying the excited signal that motor rotation becomes, its waveform is as shown in Figure 8.
The present embodiment rotation, which becomes excited signal and system and the thinking of method occurs, can be produced in itself using DSP Processor
The characteristics of PWM waveform, by flash regions inside DSP store one 0 °~360 °, step pitch be that (i.e. one completely just by K
String wave period includes Q=360/K output point) a cycle sine wave angle-data, its corresponding PWM duty cycle value ρ,
Then PWM output width P=T ρ (wherein T is the cycle of PWM pulse frequency), then sine wave is shaped as by D/A circuits
Become excited signal as rotation；To produce the excited signal of Symmetrical (i.e. differential signal), added in this programme and just draw inclined circuit,
Using the positive and negative anti-phase signal of generation of amplifier, the two subtracts each other again, you can realizes from single-ended signal and is changed into differential signal.By
No matter substantial amounts of application attestation, rotation caused by this programme become excited signal waveform in high temperature (+70 DEG C) or low temperature (- 40 DEG C)
Under, magnet excitation frequency, amplitude do not shift substantially, and its consistency is very good.
The present embodiment rotation becomes excited signal generation system and the beneficial effect of method is：It is simple and convenient, exempt to debug, produce
The frequency, amplitude, phase shift that raw rotation becomes excited signal waveform are hardly affected by temperature, and uniformity is very good；By in DSP
Portion stores a sine wave angle-data for including some output points in a cycle, and passes through PWM caused by DSP inside
The pwm pulse width of output is calculated in the PWM pulse duty cycles of sinusoidal magnitude corresponding to ripple, makes PWM interrupt cycle not
Main interrupt match only with program is got up, and is also matched with the cycle of excited signal, so as to ensure sampling rotation varying signal
Moment is exactly in the extreme point of feedback signal, ensure that the accurate of sampling instant；At the time of ADC samplings are opened every time (i.e.
It is main interrupt circulation start at the time of) force output sinusoidal magnitude be angle be 90 °, (i.e. sine wave is positive and negative most for 270 ° of value
Big value), excitatory waveform drift may be occurred after long-play, cause signal feedback sample point problem of misalignment by avoiding；This
The rotation of driver caused by scheme becomes excited signal under a certain fixed frequency, without adjusting any circuit parameter, just makes excitatory
The frequency of signal, the uniformity of amplitude are greatly improved than conventional Active RC bridge-type sine wave oscillation circuit, and even if
The frequency that rotation becomes excited signal need to be changed, DSP need to be only changed and correspondingly produce the program of sine wave and somewhat change lower D/A shaping electricity
Change is can reach if the resistance R or electric capacity C (such as the resistance R406 in Fig. 3, resistance R407 or electric capacity C409, electric capacity C410) on road to swash
The purpose of magnet rate.
Above-described is only some embodiments of the present invention.For the person of ordinary skill of the art, not
On the premise of departing from the invention design, various modifications and improvements can be made, these belong to the protection model of the present invention
Enclose.
Claims (9)
1. one kind rotation becomes excited signal and system occurs, it is characterised in that：It includes DSP Processor, produces the DSP Processor
Pwm signal ripple be shaped to the secondary reshaping circuit of smooth sine wave, differential signal will be changed into by the smooth sine wave
Positive see-saw circuit is with drawing inclined circuit and the one-level passive filter circuit being filtered to output signal and common mode output electricity
Feel T401, the angle-data module for producing sine wave is provided with the flash regions of the DSP Processor.
2. rotation as claimed in claim 1 becomes excited signal and system occurs, it is characterised in that：The secondary reshaping circuit include pair
The pwm signal ripple carries out the resistance R406 and electric capacity C409 of first time shaping, carries out second of shaping to the pwm signal ripple
Resistance R407 and electric capacity C410；
The resistance R406 connects with the pwm signal ripple；The resistance R406 output ends and the electric capacity C409, the resistance
R407 is connected at tie point a；The output end of the resistance R407 is connected at tie point b with the electric capacity C410；The electricity
Hold C409 to be connected with the other end of the electric capacity C410 and there are two tie points, one of them described tie point ground connection, another
The tie point is exported to the positive see-saw circuit.
3. rotation as claimed in claim 2 becomes excited signal and system occurs, it is characterised in that：The positive see-saw circuit includes
The first multiplying power between operational amplifier U401B, the inverting input for being arranged on the operational amplifier U401B and output end is adjusted
Whole circuit, the operational amplifier U401A being connected with the output end of the operational amplifier U401B and the operational amplifier
Second multiplying power adjustment circuit of U401A connections；The in-phase input end of the operational amplifier U401B at the tie point b with connecting
Connect；The inverting input of the operational amplifier U401A is connected with the output end of the operational amplifier U401B.
4. rotation as claimed in claim 3 becomes excited signal and system occurs, it is characterised in that：The first multiplying power adjustment circuit bag
Include resistance R415, resistance R417 and electric capacity C413, described resistance R415 one end be connected with the electric capacity C410 and the other end with
The resistance R417 and the electric capacity C413 are connected at tie point c, the tie point c and operational amplifier U401B's
Inverting input connects；Described resistance R417 one end and the electric capacity C413 are connected to tie point d at, and the tie point d and
The output end connection of the operational amplifier U401B.
5. rotation as claimed in claim 4 becomes excited signal and system occurs, it is characterised in that：The second multiplying power adjustment circuit bag
Include and be arranged on the connection line of the operational amplifier U401A inverting inputs and the operational amplifier U401B output ends
Resistance R408, one end is connected with the operational amplifier U401A inverting inputs and the other end and the operational amplifier
The resistance R414, the resistance R414 of U401A output ends connection are connected to tie point with the operational amplifier U401A output ends
At e.
6. rotation as claimed in claim 3 becomes excited signal and system occurs, it is characterised in that：It is described to draw inclined circuit to include resistance
R401, resistance R402 and electric capacity C403, the resistance R401 and the electric capacity C403 are arranged in parallel and one holds ground connection jointly,
Another common end is connected with the in-phase input end of the operational amplifier U401A；Described resistance R402 one end and the resistance
R401 connections and the other end and power end VCC0 connections.
7. rotation as claimed in claim 4 becomes excited signal and system occurs, it is characterised in that：The one-level passive filter circuit bag
Include the electric capacity C406 being connected with the operational amplifier U401A output ends, one end is connected with the electric capacity C406 output ends and another
One end and the tie point d electric capacity C412 being connected and resistance R413.
8. one kind rotation becomes excited signal method for generation, it is characterised in that：It comprises the following steps,
1) one 0 °~360 °, the sine wave angle number for a cycle that step pitch is K are stored in the flash regions of DSP Processor
According to module, then include Q output points, wherein Q=360/K in a complete sine wave period；
2) angle, θ exported as needed calculates the output pulse width P=of pwm signal ripple caused by the DSP Processor
sinθ/QfJ, and the output valve of sinusoidal wave PWM signal wave corresponding to ADC sampling instants is alternatively set as 90 °, 270 °；
3) the pwm signal ripple of output in step 2) is shaped as smooth sine wave rotation and becomes excited signal；
4) sine wave rotation after shaping is become into the positive and negative phase that Symmetrical is given birth in anti-phase drawing oblique presentation again after excited signal amplification to revolve
Become excited signal；
5) excited signal is become to caused positive and negative phase rotation and is filtered processing；
6) the positive and negative phase rotation after handling after filtering becomes both excited signals and subtracted each other, and can obtain the excitatory letter of Symmetrical
Number, i.e. differential signal.
9. rotation as claimed in claim 8 becomes excited signal method for generation, it is characterised in that：The differential signal is passed through into common mode
Outputting inductance T401 curbs the high-frequency signal that may be included in circuit.
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| CN201710840540.4A CN107547069B (en) | 2017-09-18 | 2017-09-18 | Rotation-varying excitation signal generation system and generation method |
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| CN201710840540.4A CN107547069B (en) | 2017-09-18 | 2017-09-18 | Rotation-varying excitation signal generation system and generation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021237603A1 (en) * | 2020-05-28 | 2021-12-02 | 华为数字能源技术有限公司 | Sampling triggering method, microprocessor, motor controller, and electric vehicle |
| CN113900475A (en) * | 2021-09-01 | 2022-01-07 | 河北汉光重工有限责任公司 | System and method for generating rotary transformer excitation signal |
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