CN107124164A - A kind of preparation method for producing multichannel SPWM signal and digit chip - Google Patents
A kind of preparation method for producing multichannel SPWM signal and digit chip Download PDFInfo
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- CN107124164A CN107124164A CN201710351309.9A CN201710351309A CN107124164A CN 107124164 A CN107124164 A CN 107124164A CN 201710351309 A CN201710351309 A CN 201710351309A CN 107124164 A CN107124164 A CN 107124164A
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- multichannel
- spwm
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- triangular carrier
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K4/00—Generating pulses having essentially a finite slope or stepped portions
- H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/01—Shaping pulses
- H03K5/04—Shaping pulses by increasing duration; by decreasing duration
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of method for producing multichannel SPWM signal and digit chip, this method comprises the following steps：Step 1 produces the application triangular carrier at T moment, with reference to triangular carrier and multichannel sinusoidal signal value；Step 2 produces multichannel SPWM signal by comparing；Step 3 circulation step.Described digit chip includes control unit interface module, triangular wave generation module, sinusoidal modulation wave generation module, comparison module, output module and frequency division module；The present invention is easy to implement, saves hardware resource, and triggered time error is small.Using the present invention, control circuit can be made to reduce by CPU, a simplified control system software and hardware complexity；Carrier frequency is improved, device for power switching potential is given full play to, SPWM signal triggered time precision is improved, low-order harmonic is reduced, frequency converter performance is improved；Solve the not enough problem of the hardware resources such as CPU timer, pin.
Description
Technical field
The invention belongs to electronic applications, it is related to a kind of method and digit chip for producing multichannel SPWM signal, this technology can
For high voltage converter, inverter etc..
Background technology
SPWM (sinusoidal pulse width modulation, Sinusoidal Pulse Width Modulation) signal be it is a kind of by than
The data signal produced compared with the size of sinusoidal modulation wave and triangular carrier, the SPWM when sinusoidal modulation wave is more than triangular carrier
Signal is high level, it is on the contrary then for low level.Power unit cascade type high voltage frequency converter, inverter (hereafter referred to collectively as frequency converter)
(can up to 48 tunnels) SPWM signals, it is necessary to multichannel are made up of multiple power cells.The method of conventional generation multichannel SPWM signal
It is that triangular carrier amplitude per SPWM signals all the way is identical but time shift, the amplitude and phase of sinusoidal modulation wave are according to frequency conversion
The output voltage amplitude and frequency of device and real-time change.The existing SPWM digit chips in market can only produce 6 road SPWM signals and supply
One three phase inverter bridge unit is used, it is impossible to which the need for meeting high voltage converter, and method used in these chips can not
It is directly used in multichannel SPWM signal and produces chip, because this kind of method needs to take substantial amounts of hardware resource, the core of general scale
Piece can not meet requirement.The existing method for producing multichannel SPWM signals is obtained respectively with software approach approximate calculation by CPU
In the triggered time of road SPWM signals, trigger signal is produced as hardware timer with FPGA.This mode has two and mainly lacked
Point；First, the accurate calculating in triggered time needs to solve transcendental equation, a large amount of CPU times are taken, it is impossible to which meeting real-time will
Ask, be typically only capable to using approximate calculation method, reduction carrier frequency to reduce amount of calculation, nonetheless, often need one individually
CPU dedicated for the triggered time calculating.Reduction carrier frequency prevents switching device from giving full play to its potential, adds triggering
The calculation error of time and the time error being sent to caused by FPGA are larger, cause the voltage low-order harmonic that frequency converter is exported to increase
Greatly, it is necessary to can just filter out these low-order harmonics with big filtering device, frequency converter volume is caused to increase, performance reduction.Second, by
Need to take the CPU substantial amounts of times in the calculating in triggered time, cause frequency converter control system to have to use dual-cpu structure,
It is responsible for the calculating in SPWM signal triggered times specially with one of CPU, causes system hardware and software structure extremely complex, safeguards tired
It is difficult.
The content of the invention
It is an object of the invention to provide a kind of method and digit chip for producing multichannel SPWM signal, the present invention is easy to real
Apply, save hardware resource, triggered time error is small.
A kind of following method for producing multichannel SPWM signal of the technical solution of the present invention, comprises the following steps：Step 1
, the application triangular carrier at T moment is produced, is produced with reference to triangular carrier and multichannel sinusoidal signal value and applies triangular carrier to use addition
The application triangular carrier based on amplitude tone pitch is produced with subtraction, is used to be compared with multichannel sine wave using triangular carrier
Compared with being the shared application triangular carrier of multichannel SPWM signal, this applies triangular carrier U.(T) expression formula in a cycle
It it is the sampling time for wherein T, Tc is carrier cycle, and M is amplitude modulation degree；Produce and transported with reference to triangular carrier using addition and subtraction
The reference triangular carrier for producing constant amplitude is calculated, the separation for judging front and rear half period is used for reference to triangular carrier, with reference to three
The carrier cycle of angle carrier wave is Tc, and maximum is Tmax；Calculate multichannel sinusoidal signal value and multichannel sinusoidal signal is set respectively in advance
First phase angle value Phi (I), I be sinusoidal signal numbering, calculate Wt+Phi (I), wherein W be sinusoidal signal be sinusoidal modulation wave
Angular frequency；Sine table is looked into according to Wt+Phi (I) and obtains each road sinusoidal signal value Sin (Wt+Phi (I))；Step 2, by comparing
Producing multichannel SPWM signal will be using triangular carrier Uc (T) in T moment corresponding Zhi Yuge roads sinusoidal signal value Sin (Wt+Phi
(I)) it is compared respectively, if Uc (T) is more than Sin (Wt+Phi (I)), exports high level, otherwise export low level, obtain
State of the multichannel SPWM signal at the T moment；Step 3 circulation step updates sampling instant T=T+1, return to step 1；It is final to obtain
The real-time output of multichannel SPWM signal, can produce SPWM signals for 48 tunnels.It is multiple based on the time-division in each sampling period
Sin (Wt+Phi (I)) calculating is completed with mode and pipeline system and Uc (T) and Sin (Wt+Phi) comparison are grasped
Make.Sampling Zhou Qiyue is Lus, and Tmax is Tc/2.
The preparation method of digit chip.The present invention makes digit chip, including control using multichannel SPWM signal method is produced
Device interface module processed, triangular wave generation module, sinusoidal modulation wave generation module, comparison module, output module and frequency division module.Control
Device interface module processed is communicated to connect with CPU, in control unit interface module, carrier cycle register TcReg and modulation degree register
MdReg is connected with triangular wave generation module；Modulating wave period register TrReg and multiple SPWM modulating waves phase registers
PhiReg is connected with sinusoidal modulation wave generation module；Triangular wave generation module is used to produce application triangular carrier and carried with reference to triangle
Ripple；Sinusoidal modulation wave generation module is used for the output valve for calculating multichannel sine wave；The application triangular carrier of triangular wave generation module
The multichannel sinewave output end of output end and sinusoidal modulation wave generation module connects with the input of comparison module；Comparison module
It is compared for the output valve by application triangular carrier value respectively with multichannel sine wave；(T-Tc/2), Tc/2<t<tc0<t.
The internal structure of sinusoidal modulation wave generation module is the Elk signals and load after the input termination frequency dividing of Wt generation units
Wave period register TcReg, the output end of an input termination Wt generation unit of adder, another input of adder
I-th SPWM modulating wave phase register PhiReg are met, output termination sine table RAM, sine table the RAM output of adder is sinusoidal
Value；Sine table RAM is using the embedded ram cell inside FPGA.The digit chip of multichannel SPWM signal is produced, its feature exists
In SPWM modulating wave phase registers PhiReg is 48, and described CPU is DSP.
Embodiment
Example 1, a kind of preparation method for the method and digit chip for producing multichannel Spwm signals.（1）One kind produces multichannel
The method of SPWM signals, comprises the following steps：
Step 1, produce the application triangular carrier at T moment, application triangle load is produced with reference to triangular carrier and multichannel sinusoidal signal value
Ripple produces the application triangular carrier based on amplitude tone pitch using addition and subtraction, is used for using triangular carrier sinusoidal with multichannel
Ripple is compared, and is the shared application triangular carrier of multichannel SPWM signal, this is using triangular carrier Uc (T) in a cycle
Expression formula for wherein T be the sampling time, Tc is carrier cycle, and M is amplitude modulation degree；Produce and use addition with reference to triangular carrier
The reference triangular carrier of constant amplitude is produced with subtraction, the boundary for judging front and rear half period is used for reference to triangular carrier
Point, with reference to triangular carrier carrier cycle be Tc, maximum is Tmax；Calculate multichannel sinusoidal signal value and multichannel is set respectively in advance
The first phase angle value Phi (I) of sinusoidal signal, I are the numbering of sinusoidal signal, calculate Wt+Phi (I), and wherein W is that sinusoidal signal is just
The angular frequency of string modulating wave；Sine table is looked into according to Wt+Phi (I) and obtains each road sinusoidal signal value Sin (Wt+Phi (I))；Step 2,
Will be using triangular carrier Uc (T) in T moment corresponding Zhi Yuge roads sinusoidal signal value Sin by comparing generation multichannel SPWM signal
(Wt+Phi (I)) is compared respectively, if Uc (T) is more than Sin (Wt+Phi (I)), is exported high level, is otherwise exported low electricity
It is flat, obtain state of the multichannel SPWM signal at the T moment；Step 3 circulation step updates sampling instant T=T+1, return to step 1；Most
The real-time output of multichannel SPWM signal is obtained eventually, can produce SPWM signals for 48 tunnels.In each sampling period, it is based on
Time division multiplexing mode and pipeline system complete Sin (Wt+Phi (I)) calculating and Uc (T) and Sin (Wt+Phi)
Compare operation.Sampling Zhou Qiyue is Lus, and Tmax is Tc/2.
（2）The preparation method of digit chip.
Make the digit chip of the generation multichannel SPWM signal for the method for producing multichannel SPWM signal, including control unit interface
Module, triangular wave generation module, sinusoidal modulation wave generation module, comparison module, output module and frequency division module.Control unit interface
Module is communicated to connect with CPU, in control unit interface module, carrier cycle register TcReg and modulation degree register MdReg and three
Angle ripple generation module connection；Modulating wave period register TrReg and multiple SPWM modulating waves phase register PhiReg and sine
Modulating wave generation module is connected；Triangular wave generation module is used to produce application triangular carrier and refers to triangular carrier；Sine Modulated
Ripple generation module is used for the output valve for calculating multichannel sine wave；The application triangular carrier output end and sine of triangular wave generation module
The multichannel sinewave output end of modulating wave generation module connects with the input of comparison module；Comparison module is used to that three will to be applied
Output valve of the angle carrier value respectively with multichannel sine wave is compared；(T-Tc/2), Tc/2<t<tc0<t.
The internal structure of sinusoidal modulation wave generation module is the Elk signals and load after the input termination frequency dividing of Wt generation units
Wave period register TcReg, the output end of an input termination Wt generation unit of adder, another input of adder
I-th SPWM modulating wave phase register PhiReg are met, output termination sine table RAM, sine table the RAM output of adder is sinusoidal
Value；Sine table RAM is using the embedded ram cell inside FPGA.The digit chip of multichannel SPWM signal is produced, its feature exists
In SPWM modulating wave phase registers PhiReg is 48, and described CPU is DSP.
Claims (5)
1. a kind of method for producing multichannel SPWM signal, it is characterised in that comprise the following steps：Step 1, answering for T moment is produced
Application triangular carrier is produced with triangular carrier, with reference to triangular carrier and multichannel sinusoidal signal value to produce using addition and subtraction
Application triangular carrier based on amplitude tone pitch, is used to be compared with multichannel sine wave using triangular carrier, is multichannel SPWM letter
Number shared application triangular carrier, this using expression formulas of the triangular carrier Uc (T) in a cycle to be wherein T be sampling when
Between, Tc is carrier cycle, and M is amplitude modulation degree；Produce with reference to triangular carrier using addition and subtraction generation constant amplitude
Reference triangular carrier, be used to judge the separation of front and rear half period with reference to triangular carrier, with reference to the carrier cycle of triangular carrier
Phase is Tc, and maximum is Tmax；Calculate the first phase angle value Phi that multichannel sinusoidal signal value sets multichannel sinusoidal signal respectively in advance
(I), I be sinusoidal signal numbering, calculate Wt+Phi (I), wherein W be sinusoidal signal be sinusoidal modulation wave angular frequency；According to
Wt+Phi (I) looks into sine table and obtains each road sinusoidal signal value Sin (Wt+Phi (I))；Step 2 produces multichannel SPWM letter by comparing
Number will respectively it be compared in T moment corresponding Zhi Yuge roads sinusoidal signal value Sin (Wt+Phi (I)) using triangular carrier Uc (T)
Compared with if Uc (T) exports high level, otherwise exports low level, obtain multichannel SPWM signal and exist more than Sin (Wt+Phi (I))
The state at T moment；Step 3 circulation step updates sampling instant T=T+1, return to step 1；Final acquisition multichannel SPWM signal
Output in real time；Described SPWM signals are 48 tunnels；The method of described generation multichannel SPWM signal, it is characterised in that each
In the individual sampling period, Sin (Wt+Phi (I)) calculating and Uc is completed based on time division multiplexing mode and pipeline system
(T) and Sin (Wt+Phi) comparison operation.
2. the method for the generation multichannel SPWM signal according to any one of claim 1, it is characterised in that sampling Zhou Qiyue
For Lus, Tmax is Tc/2.
3. a kind of number of the generation multichannel SPWM signal of the method for the generation multichannel SPWM signal based on described in right any one of 1-2
Word chip, it is characterised in that including control unit interface module, triangular wave generation module, sinusoidal modulation wave generation module, compare
Module, output module and frequency division module；Control unit interface module is communicated to connect with CPU, in control unit interface module, carrier cycle
Register TcReg and modulation degree register MdReg are connected with triangular wave generation module；Modulating wave period register TrReg and many
Individual SPWM modulating waves phase register PhiReg is connected with sinusoidal modulation wave generation module；Triangular wave generation module is used to produce
Using triangular carrier and refer to triangular carrier；Sinusoidal modulation wave generation module is used for the output valve for calculating multichannel sine wave；Triangle
The application triangular carrier output end of ripple generation module and the multichannel sinewave output end of sinusoidal modulation wave generation module are with being compared
The input of module connects；The output valve that comparison module is used for by application triangular carrier value respectively with multichannel sine wave is compared
Compared with；(T-Tc/2), Tc/2<t<tc0<t.
4. the digit chip according to claim 3 for producing multichannel SPWM signal, it is characterised in that sinusoidal modulation wave is produced
The internal structure of raw module is the Elk signals and carrier cycle register TcReg after the input termination frequency dividing of Wt generation units,
The output end of one input termination Wt generation unit of adder, another input termination i-th SPWM modulating wave of adder
Phase register PhiReg, output termination sine table RAM, sine table RAM the output sine value of adder；Sine table RAM is used
Embedded ram cell inside FPGA.
5. the digit chip according to claim 4 for producing multichannel SPWM signal, it is characterised in that SPWM modulating wave phases
Bit register PhiReg is 48, and described CPU is DSP.
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| CN201710351309.9A CN107124164A (en) | 2017-05-18 | 2017-05-18 | A kind of preparation method for producing multichannel SPWM signal and digit chip |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080018410A1 (en) * | 2006-07-24 | 2008-01-24 | General Research Of Electronics, Inc. | Voltage controlled oscillator |
| CN101355349A (en) * | 2007-07-23 | 2009-01-28 | 晶豪科技股份有限公司 | Circuit and method for generating triangular wave |
| CN101626225A (en) * | 2008-06-23 | 2010-01-13 | 三星电子株式会社 | Sawtooth wave generating circuit and switch mode power supply having the same |
| CN101997524A (en) * | 2010-09-26 | 2011-03-30 | 中南林业科技大学 | Method and digital chip for generating multi-path SPWM signals |
| CN106105034A (en) * | 2014-04-16 | 2016-11-09 | 密克罗奇普技术公司 | Slope generation module |
-
2017
- 2017-05-18 CN CN201710351309.9A patent/CN107124164A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080018410A1 (en) * | 2006-07-24 | 2008-01-24 | General Research Of Electronics, Inc. | Voltage controlled oscillator |
| CN101355349A (en) * | 2007-07-23 | 2009-01-28 | 晶豪科技股份有限公司 | Circuit and method for generating triangular wave |
| CN101626225A (en) * | 2008-06-23 | 2010-01-13 | 三星电子株式会社 | Sawtooth wave generating circuit and switch mode power supply having the same |
| CN101997524A (en) * | 2010-09-26 | 2011-03-30 | 中南林业科技大学 | Method and digital chip for generating multi-path SPWM signals |
| CN106105034A (en) * | 2014-04-16 | 2016-11-09 | 密克罗奇普技术公司 | Slope generation module |
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