CN103812476B - Sine wave pulse width adjusting controller - Google Patents
Sine wave pulse width adjusting controller Download PDFInfo
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- CN103812476B CN103812476B CN201210449076.3A CN201210449076A CN103812476B CN 103812476 B CN103812476 B CN 103812476B CN 201210449076 A CN201210449076 A CN 201210449076A CN 103812476 B CN103812476 B CN 103812476B
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- sine wave
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- 230000009471 action Effects 0.000 claims abstract description 23
- 239000000872 buffer Substances 0.000 claims abstract description 17
- 238000004364 calculation method Methods 0.000 claims abstract description 12
- 238000003708 edge detection Methods 0.000 claims abstract description 11
- 230000008878 coupling Effects 0.000 claims abstract description 7
- 238000010168 coupling process Methods 0.000 claims abstract description 7
- 238000005859 coupling reaction Methods 0.000 claims abstract description 7
- 239000003990 capacitor Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000009885 systemic effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 210000001367 artery Anatomy 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Abstract
nullThe present invention is a kind of sine wave pulse width adjusting controller，Including edge detection unit、Buffer、Angle increment unit、Sinusoidal wave computing unit、Multiplication unit and sinewave output unit，And edge detection unit receives the back coupling input signal of external electrical device，To produce margin signal，Buffer stores and output parameter signal，Angle increment unit receives margin signal and parameter signal，Determine that pulse width modulation cycle-index produces angle signal，Sinusoidal wave computing unit receives and produces sinusoidal wave value of calculation to carry out the recursive algorithm of Coordinate Rotation Digital calculating according to angle signal，Multiplication unit receives sinusoidal wave value of calculation and is multiplied by amplitude signal and produces pulse width signal，And received by sinewave output unit and drive signal to produce，Use and drive external electrical device to produce on this action element and have sinusoidal wave terminal voltage.
Description
Technical field
The invention relates to a kind of pulse width modulation controller, be particularly useful for producing sinusoidal wave arteries and veins
Rush width modulation and drive signal.
Background technology
At machine field and electronic applications, especially Power convert field, it is sought after the sine of pinpoint accuracy
Ripple, and prior art is usually and is stored to internal memory by substantial amounts of sine values with lookup table mode, and make
Used time, read sine values corresponding in internal memory according to required angle.
But, prior art disadvantage is that the most jumbo internal memory, and the improvement phase to degree of accuracy
When limited.Accordingly, it would be desirable to a kind of sine wave pulse width adjusting controller, suitable algorithm is utilized to carry out
Calculate, to save internal memory, and simplify overall system architecture, and then solve above-mentioned problem of the prior art.
Summary of the invention
Present invention is primarily targeted at a kind of sine wave pulse width adjusting controller of offer, including edge
Detecting unit, buffer, angle increment unit, sinusoidal wave computing unit, multiplication unit and sine wave
Output unit, in order to drive external electrical device to produce sine wave, wherein external electrical device at least includes
One action element.
Edge detection unit receives the back coupling input signal of external electrical device, and carries out edge detection to produce
Raw margin signal, buffer stores at least one parameter, and at least output parameter signal, amplitude signal and behaviour
Operation mode, and the parameter of buffer is to set by systemic presupposition or by user, angle increment unit receives
Margin signal and parameter signal, to determine pulse width modulation cycle-index, and then produce angle signal.
Sinusoidal wave computing unit receives and calculates with the recurrence carrying out Coordinate Rotation Digital calculating according to angle signal
Method, and then produce sinusoidal wave value of calculation, multiplication unit receives sinusoidal wave value of calculation, and with from buffer
Amplitude signal carry out multiplication operation, produce pulse width signal, sinewave output unit receives pulse width
Spend signal and produce multiple sine wave drive signal in pulse width modulation mode.
Therefore, sine wave drive signal produced by sinewave output unit, external electrical device can be driven
And on action element, produce the terminal voltage with sine wave.
Accompanying drawing explanation
Fig. 1 is the schematic diagram showing sine wave pulse width adjusting controller of the present invention；
Showing of the full-bridge type electric device that Fig. 2 is driven by sine wave pulse width adjusting controller of the present invention
It is intended to；
Showing of the semibridge system electric device that Fig. 3 is driven by sine wave pulse width adjusting controller of the present invention
It is intended to；
Fig. 4 is the schematic diagram of CORDIC recursive algorithm in the display present invention；
Fig. 5 is the output waveform figure showing sine wave pulse width adjusting controller of the present invention.
Wherein, description of reference numerals is as follows:
10 edge detection unit
20 buffers
30 angle increment unit
40 sinusoidal wave computing units
50 multiplication units
60 sinewave output unit
70 external electrical devices
AM amplitude signal
AN angle signal
C filter capacitor
ED margin signal
FB feedbacks input signal
L action element
L1 filter inductance
MD operator scheme
PR parameter signal
The SQ1 primary sinusoid drives signal
SQ2 the second sine wave drive signal
SQ3 the 3rd sine wave drive signal
SQ4 the 4th sine wave drive signal
ST sine wave value of calculation
SW pulse width signal
T1 first drives transistor
T2 second drives transistor
T3 the 3rd drives transistor
T4 the 4th drives transistor
VH high-voltage power-line
VL low-tension supply line
VO terminal voltage
Detailed description of the invention
Hereinafter coordinate graphic and component symbol that embodiments of the present invention are done more detailed description, so that ripe
Know those skilled in the art can implement according to this after studying this specification carefully.
With reference to Fig. 1, for the schematic diagram of sine wave pulse width adjusting controller of the present invention.As it is shown in figure 1,
The sine wave pulse width modulation (Sine Pulse Width Modulation, SIN PWM) of the present invention controls
Device include edge detection unit 10, buffer 20, angle increment unit 30, sinusoidal wave computing unit 40,
Multiplication unit 50 and sinewave output unit 60, calculate in order to implement Coordinate Rotation Digital
The recursive algorithm of (Coordinate Rotation Digital Computer, CORDIC), drives external electrical
Device 70 is to produce sine wave, and furthermore, and the sine wave pulse width adjusting controller of the present invention
Mainly form feedback loop, stable back coupling can be provided to control outside electric device 70.
Above-mentioned external electrical device 70 can include the device shown in Fig. 2 or Fig. 3, respectively full-bridge type electricity
Device of air and semibridge system electric device.It is to be noted, however, that, the device of Fig. 2 or Fig. 3 simply in order to
The technical characteristic of the present invention is described, is not limited to the scope of the present invention.
First, the full-bridge type electric device of explanatory diagram 2, mainly include the first driving transistor T1, second
Drive transistor T2, the 3rd driving transistor T3, the 4th driving transistor T4, action element L, filter
Ripple inductance L1 and filter capacitor C, wherein first drive transistor T1, second drive transistor T2, the
Three drive transistor T3 and the 4th drive transistor T4 respectively by the primary sinusoid drive signal SQ1, the
Two sine wave drive signal SQ2, the 3rd sine wave drive signal SQ3 and the 4th sine wave drive signal
SQ4 drives.First drives transistor T1 and second to drive transistor T2 concatenation to be connected to high voltage power supply
Between line VH and low-tension supply line VL.Similarly, the 3rd transistor T3 and the 4th is driven to drive crystal
Pipe T4 concatenates and is connected between high-voltage power-line VH and low-tension supply line VL.Additionally, filter inductance
L1 and filter capacitor C concatenates and is connected to the first driving transistor T1 and second and drives transistor T2's
Concatenation point and the 3rd drives transistor T3 and the 4th to drive the concatenation point of transistor T4, and action element
L is treated as load, and is connected in parallel to filter capacitor C.
With reference to Fig. 3, semibridge system electric device is analogous to the full-bridge framework of Fig. 2, brilliant including the first driving
Body pipe T1, the second driving transistor T2, the first electric capacity C1, the second electric capacity C2, action element L, filter
Ripple inductance L1 and filter capacitor C, wherein first drives transistor T1, the second driving transistor T2 respectively
Being driven signal SQ1, the second sine wave drive signal SQ2 to drive by the primary sinusoid, first drives crystal
Pipe T1, second drive transistor T2 concatenation and the first electric capacity C1, second electric capacity C2 concatenation and further
It is connected between high-voltage power-line VH and low-tension supply line VL.Filter inductance L1 and filter capacitor C string
Connect and be connected to the first driving transistor T1 and second and drive concatenation point and the action element of transistor T2
One end of L, and action element L parallel filtering electric capacity C, and the other end of action element L is connected to
One electric capacity C1, the concatenation point of the second electric capacity C2.
Terminal voltage VO of above-mentioned action element L can form Fig. 1's through voltage attenuator (not shown)
Feedback input signal FB, or available flow through the electric current of action element L through current attenuator (not shown)
And form back coupling input signal FB.
In FIG, the edge detection unit 10 of sine wave pulse width adjusting controller receives from outside
Back coupling input signal FB of electric device 70, carries out edge detection to determine that present waveform is positive half cycle
Or negative half period, and then produce margin signal ED.Buffer 20 stores at least one parameter, and at least
Output parameter signal PR, amplitude signal AM, operator scheme MD, and the parameter of buffer 20 can be by being
System is preset or is set by user, and can include input angle (such as 1 ° or 1.5 °), the sine being incremented by
The amplitude of ripple, out-of-service time (dead time), the startup control bit of sinusoidal wave width modulation.
Angle increment unit 30 receives from the margin signal ED of edge detection unit 10 and from slow
The parameter signal PR of storage 20, to determine PWM cycle number of times in half cycle (PWM cycles), and then produces
Raw angle signal AN.Such as, when parameter signal PR is 1, each half cycle has 180 PWM cycle,
And when parameter signal PR is 0.5, each half cycle has 360 PWM cycle.
Sinusoidal wave computing unit 40 receives and the angle signal AN of foundation angle increment unit 30, carries out the right side
Displacement processes, and to realize the recursive algorithm of CORDIC, and produces sinusoidal wave value of calculation ST.Briefly below
The recursive algorithm of CORDIC is described.
Sinusoidal wave current amplitude, sin (θ), can be determined by the amplitude of previous angle, therefore, can be by angle
It is 0 ° of beginning, obtains the amplitude of next angle with the angle of equal distribution.Specifically, with reference to Fig. 4,
In plane rectangular coordinates 2 are respectively provided with coordinate (X1, Y1) and (X2, Y2), are expressed as follows:
(X1, Y1)=(cos (θ 1), sin (θ 1))
(X2, Y2)=(cos (θ 2), sin (θ 2))
Wherein θ 1 and θ 2 respectively coordinate (X1, Y1) and (X2, Y2) is in polar angle, and such as figure
Shown in, angle, θ is the difference (θ=θ 2-θ 1) of θ 2 and θ 1, therefore, coordinate (X2, Y2) can mat coordinate (X1,
Y1) it is expressed as follows:
X2=X1*cos (θ)-Y1*sin (θ)
Y2=Y1*sin (θ)+Y1*cos (θ)
Or be organized into further:
X2=cos (θ) * [X1-Y1*tan (θ)]
Y2=cos (θ) * [X1*tan (θ)+Y1]
It is below the general of above-mentioned coordinate:
Xn=cos (θ n) * [Xn-1-Yn-1*tan(θn)]
Yn=cos (θ n) * [Xn-1*tan(θn)+Yn-1]
Wherein n is nonnegative integer (n=0,1,2,3 etc.), and θ n is the n-th coordinate (Xn, Yn)
Relative to the angle folded by previous (n-1)th coordinate (Xn-1, Yn-1), and the initial value of θ n (n=0) is 0 °,
And afterwards n=1,2,3 time, θ n angle is respectively 45 °, 26.565 °, 14.0362 °, that is θ n=tan-1(1
/2n-1)。
Therefore, the concrete operations of sinusoidal wave computing unit 40 are based on CORDIC recursive algorithm by present
Numerical value carries out moving to right a bit arithmetic and calculating tan (θ n), and produced by sinusoidal wave computing unit 40 just
String ripple value of calculation ST refers to tan (θ n), that is 1/2n-1。
Multiplication unit 50 receives the sinusoidal wave value of calculation ST from sinusoidal wave computing unit 40, and with from
The amplitude signal AM of buffer 20 carries out multiplication operation, to produce pulse width signal SW, and by just
String ripple output unit 60 receives and produces the primary sinusoid with PWM mode and drive signal SQ1, second just
String ripple drives signal SQ2, the 3rd sine wave drive signal SQ3 and the 4th sine wave drive signal SQ4,
Use terminal voltage VO driving external electrical device 70 to produce sine wave, as shown in Figure 5.It is noted that
It is that the semibridge system electric device in Fig. 3 needs the primary sinusoid to drive signal SQ1, the second sine wave to drive
Dynamic signal SQ2 drives.
Therefore, the feature of the present invention is mainly to utilize the sinusoidal wave computing unit moving to right to calculate
The tangent value (tan) of next angle, in order to the sine wave drive signal needed for follow-up generation, can avoid using
Substantial amounts of table look-up to deposit the trigonometric function value that degree of accuracy is higher, save internal memory, and overall architecture can be simplified,
Improve speed of operation and efficiency.
The foregoing is only to explain presently preferred embodiments of the present invention, be not intended to according to this present invention be done
Any pro forma restriction.Therefore, all have made under identical spirit for the present invention any
Modify or change, all must be included in the category that the invention is intended to protection.
Claims (6)
1. a sine wave pulse width adjusting controller, in order to drive an external electrical device, and this is outer
Portion's electric device at least includes an action element, it is characterised in that this sine wave pulse width modulation controls
Device includes:
One edge detecting unit, receives the back coupling input signal from this external electrical device, and carries out
Edge detection is to produce a margin signal；
One buffer, stores at least one parameter, and at least exports a parameter signal, an amplitude signal and
Operator scheme, and the parameter of this buffer is to set by systemic presupposition or by user；
One angle increment unit, receives this margin signal and this parameter signal, to determine pulse width modulation
(Pulse Width Modulation, PWM) cycle-index (cycles), and then produce an angle signal；
One sinusoidal wave computing unit, receives and according to this angle signal to carry out right displacement process, to realize
Coordinate Rotation Digital calculates the recurrence of (Coordinate Rotation Digital Computer, CORDIC) and calculates
Method, and then produce a sinusoidal wave value of calculation；
One multiplication unit, receives this sine wave value of calculation, and carries out with the amplitude signal from this buffer
Multiplication operates, to produce a pulse width signal；And
One sinewave output unit, receives this pulse width signal and is just producing one first with PWM mode
String ripple is just driving signal, one second sine wave drive signal, one the 3rd sine wave drive signal and the 4th
String ripple drives signal, uses this external electrical device of driving and produces on this action element and have sine wave
Terminal voltage.
2. sine wave pulse width adjusting controller as claimed in claim 1, it is characterised in that this is outer
Portion's electric device farther includes one first driving transistor, one second driving transistor, one the 3rd driving
Transistor, one the 4th driving transistor, a filter inductance and a filter capacitor, and this first driving crystal
Pipe, this second drive transistor, the 3rd drive transistor and the 4th drive transistor respectively by this
One sine wave drive signal, this second sine wave drive signal, the 3rd sine wave drive signal and this
Four sine wave drive signal drive, this first drive transistor and this second drive transistor series connection and connect
To between a high-voltage power-line and a low-tension supply line, the 3rd drives transistor and the 4th to drive crystal
Pipe concatenates and is connected between this high-voltage power-line and this low-tension supply line, this filter inductance and this filtered electrical
Hold concatenation and be connected to this first drive transistor and this second drive a string contact of transistor and this
Three drive transistor and the 4th to drive a string contact of transistor, and this action element is treated as load,
And it is connected in parallel to this filter capacitor.
3. sine wave pulse width adjusting controller as claimed in claim 1, it is characterised in that this time
Award the terminal voltage that input signal is this action element to be formed through a voltage attenuator, or with flowing through this action
The electric current of element is formed through a current attenuator.
4. a sine wave pulse width adjusting controller, in order to drive an external electrical device, and this is outer
Portion's electric device at least includes an action element, it is characterised in that this sine wave pulse width modulation controls
Device includes:
One edge detecting unit, receives the back coupling input signal from this external electrical device, and carries out
Edge detection is to produce a margin signal；
One buffer, stores at least one parameter, and at least exports a parameter signal, an amplitude signal and
Operator scheme, and the parameter of this buffer is to set by systemic presupposition or by user；
One angle increment unit, receives this margin signal and this parameter signal, to determine pulse width modulation
(Pulse Width Modulation, PWM) cycle-index (cycles), and then produce an angle signal；
One sinusoidal wave computing unit, receives and according to this angle signal to carry out right displacement process, to realize
Coordinate Rotation Digital calculates the recurrence of (Coordinate Rotation Digital Computer, CORDIC) and calculates
Method, and then produce a sinusoidal wave value of calculation；
One multiplication unit, receives this sine wave value of calculation, and carries out with the amplitude signal from this buffer
Multiplication operates, to produce a pulse width signal；And
One sinewave output unit, receives this pulse width signal and is just producing one first with PWM mode
String ripple drives signal and one second sine wave drive signal, uses this external electrical device of driving and moves at this
Make on element, to produce the terminal voltage with sine wave.
5. sine wave pulse width adjusting controller as claimed in claim 4, it is characterised in that this is outer
Portion's electric device farther include one first driving transistor, one second drive transistor, one first electric capacity,
One second electric capacity, a filter inductance and a filter capacitor, and this first driving transistor, this second driving
Transistor is driven signal and this second sine wave drive signal to drive by this primary sinusoid respectively, and this is first years old
Transistor and this second driving transistor series connection is driven to be connected to a high-voltage power-line and a low-tension supply line
Between, this first electric capacity and this second capacitance series and be connected to this high-voltage power-line and this low-tension supply line
Between, one end of this filter inductance is connected to this first driving transistor and the one of this second driving transistor
Concatenation point, an other end of this filter inductance is connected to one end of this filter capacitor and the one of this action element
End, an other end of this filter capacitor and an other end of this action element connect this first electric capacity and this
A string contact of two electric capacity, and this action element is to be connected in parallel to this filter capacitor.
6. sine wave pulse width adjusting controller as claimed in claim 4, it is characterised in that this time
Award the terminal voltage that input signal is this action element to be formed through a voltage attenuator, or with flowing through this action
The electric current of element is formed through a current attenuator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210449076.3A CN103812476B (en) | 2012-11-12 | 2012-11-12 | Sine wave pulse width adjusting controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210449076.3A CN103812476B (en) | 2012-11-12 | 2012-11-12 | Sine wave pulse width adjusting controller |
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| CN103812476A CN103812476A (en) | 2014-05-21 |
| CN103812476B true CN103812476B (en) | 2016-08-10 |
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| CN201210449076.3A Expired - Fee Related CN103812476B (en) | 2012-11-12 | 2012-11-12 | Sine wave pulse width adjusting controller |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2019110505A (en) * | 2017-12-20 | 2019-07-04 | 株式会社村田製作所 | Transmission unit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008301017A (en) * | 2007-05-30 | 2008-12-11 | Tritec Corp | Digital pulse width modulation apparatus |
| CN102111134A (en) * | 2009-12-25 | 2011-06-29 | 产晶集成电路股份有限公司 | Drive device of pulse width modulation step wave and sine wave |
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- 2012-11-12 CN CN201210449076.3A patent/CN103812476B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008301017A (en) * | 2007-05-30 | 2008-12-11 | Tritec Corp | Digital pulse width modulation apparatus |
| CN102111134A (en) * | 2009-12-25 | 2011-06-29 | 产晶集成电路股份有限公司 | Drive device of pulse width modulation step wave and sine wave |
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