CN107086808A - A kind of photovoltaic DC-to-AC converter and its control method - Google Patents
A kind of photovoltaic DC-to-AC converter and its control method Download PDFInfo
- Publication number
- CN107086808A CN107086808A CN201710302309.XA CN201710302309A CN107086808A CN 107086808 A CN107086808 A CN 107086808A CN 201710302309 A CN201710302309 A CN 201710302309A CN 107086808 A CN107086808 A CN 107086808A
- Authority
- CN
- China
- Prior art keywords
- data
- photovoltaic
- registers
- spiclk
- spidat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 238000004891 communication Methods 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 12
- 241001269238 Data Species 0.000 claims description 7
- 238000012546 transfer Methods 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims 1
- 230000009977 dual effect Effects 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
- H02M7/53873—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current with digital control
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F15/00—Digital computers in general; Data processing equipment in general
- G06F15/16—Combinations of two or more digital computers each having at least an arithmetic unit, a program unit and a register, e.g. for a simultaneous processing of several programs
- G06F15/163—Interprocessor communication
- G06F15/17—Interprocessor communication using an input/output type connection, e.g. channel, I/O port
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0012—Control circuits using digital or numerical techniques
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Power Engineering (AREA)
- Software Systems (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Inverter Devices (AREA)
Abstract
The present invention provides a kind of photovoltaic DC-to-AC converter and its control method, Serial Peripheral Interface (SPI) of the photovoltaic DC-to-AC converter based on processor realizes principal and subordinate processor control, described to be used for digital signal acquiring and digital filtering from processor, the primary processor is used to directly read the data from processor and calculated.Photovoltaic DC-to-AC converter proposed by the present invention carries out sending for the reception, processing and control signal of data using dual processors, both master-slave cpus cooperate, arithmetic speed can be improved, avoid situation about being burned when volume of transmitted data is big, ectocine can be tracked in time to react rapidly, the tracking to AC amplitude and phase is more accurate.
Description
Technical field
The present invention relates to photovoltaic generation control technology field, more particularly, to a kind of photovoltaic DC-to-AC converter and its controlling party
Method.
Background technology
Inverter is also known as feed regulator isolator, can be divided into self power supply according to purposes of the inverter in photovoltaic generating system
With with grid-connected with two kinds.For the inverter for grid-connected system, according to there is transless to be divided into transformer type inverter again
And inverter without transformer.In solar power system, the height of inverter efficiency is to determine solar cell capacity and storage
The key factor of battery capacity size.Photovoltaic DC-to-AC converter is made up of boosting loop and inversion bridge type return, and boosting loop is mainly used
The DC voltage needed for dc voltage boost to inverter is exported, inversion bridge type return is mainly used in the direct current after boosting
Pressure is converted to the alternating voltage of fixed frequency.
At present, the control system of existing photovoltaic combining inverter is generally using list CPU controls, and data transfer is slower,
When control strategy is complicated, CPU load is very big, causes CPU heating problem, can seriously burn out it, then whole photovoltaic inversion
The core of device is damaged, it is impossible to run.Due to the limitation of the speed of service, cause control system timely according to ectocine
React, the tracking to signal has also postponed, certain influence is caused on the actual motion of photovoltaic DC-to-AC converter.
The content of the invention
The present invention provide a kind of photovoltaic DC-to-AC converter for overcoming above mentioned problem or solving the above problems at least in part and its
Control method, by using two-ways cpu, can significantly improve the speed of service and reaction speed.
According to an aspect of the present invention there is provided a kind of photovoltaic DC-to-AC converter, string of the photovoltaic DC-to-AC converter based on processor
Row Peripheral Interface realizes principal and subordinate processor control, described to be used for digital signal acquiring and digital filtering, the main place from processor
Reason device is used to directly read the data from processor and calculated.
As the further improvement of above-mentioned technical proposal, the processor realizes principal and subordinate's mould by designing Serial Peripheral Interface (SPI)
Formula.
As the further improvement of above-mentioned technical proposal, as MASTER/SLAVE=1, under host mode, main process task
Device exports clock signal on SPICLK pins, for providing clock for whole serial communication network.
As the further improvement of above-mentioned technical proposal, the SPIBRR registers of the primary processor are used to determine communication network
The message transmission rate of network；Wherein, 126 kinds of different baud rates can be configured by SPIBBR registers.
As the further improvement of above-mentioned technical proposal, primary processor is used for from SPISIMO pin output datas, and latches
Input data on SPISOMI pins.
It is used as the further improvement of above-mentioned technical proposal, SPIDAT the or SPITXBUF registers write-in data of primary processor
Data on Shi Qidong SPISIMO pins are sent, and highest significant position is sent first；Meanwhile, the data that SPISOMI pins are received
SPIDAT registers are displaced into, what is moved at first is least significant bit.Send after the digit of setting, the data quilt received
It is transferred in SPIRXBUF registers in case CPU is read.Data are stored in SPIRXBUF registers by the way of Right Aligns.
As the further improvement of above-mentioned technical proposal, as MASTER/SLAVE=0, under slave mode, SPISOMI
Pin is used for data transfer, and the serial shift clock that SPICLK pin incoming serial Peripheral Interface is provided, the clock is carried by SPI
For transmission speed is also determined by the clock, and SPICLK input clock frequency highest is no more than LSPCLK/4.
As the further improvement of above-mentioned technical proposal, when slave receives the SPICLK signals from main frame, SPICLK is fitted
When hopping edge, the data in register SPIDAT or SPITXBUF are sent on spi bus.
As the further improvement of above-mentioned technical proposal, after all characters in SPIDAT registers are all removed, it is written to
The data of SPITXBUF registers are transferred in SPIDAT registers.
Slave simultaneously receive data and send data when, then write data into before SPICLK starts SPITXBUF or
In SPIDAT registers.
When slave receives data, SPI waits the SPICLK signals from main frame, in the appropriate hopping edges of SPICLK, just will
Data on SPISIMO pins are moved into SPIDAT registers.If slave sends data while data are received, must
Must be in SPITXBUF or SPIDAT registers be write data into before SPICLK starts.
The application also proposes a kind of control method of photovoltaic DC-to-AC converter, and the control method uses the principal and subordinate two of two-ways cpu
Plant mode of operation.
Under host mode, SPI main frames export clock signal on SPICLK pins, when being provided for whole serial communication network
Clock；SPIBRR registers determine the message transmission rate of communication network, by SPIBBR registers can configure 126 kinds it is different
Baud rate；SPI latches the input data on SPISOMI pins from SPISIMO pin output datas；SPIDAT or
The data that SPITXBUF registers start when writing data on SPISIMO pins are sent, and highest significant position is sent first；Meanwhile,
The data that SPISOMI pins are received are displaced into SPIDAT registers, and what is moved at first is least significant bit；Setting is sent
Digit after, the data received be transferred in SPIRXBUF registers in case CPU read, data are in SPIRXBUF registers
It is middle to be stored by the way of Right Aligns；
Under slave mode, SPISOMI pins transmission data, SPICLK pin incoming serial shift clocks, the clock is by SPI
There is provided, transmission speed is also determined by the clock, SPICLK input clock frequency highest is no more than LSPCLK/4；Slave is received
During SPICLK signals from main frame, SPICLK hopping edges, it is total that the data in register SPIDAT or SPITXBUF are sent to SPI
On line；After all characters in SPIDAT registers are all removed, the data for being written to SPITXBUF registers are transferred to
In SPIDAT registers.When slave receives data, SPI waits the SPICLK signals from main frame, in SPICLK hopping edges, just will
Data on SPISIMO pins are moved into SPIDAT registers；If slave sends data while data are received, must
Must be in SPITXBUF or SPIDAT registers be write data into before SPICLK starts.
Photovoltaic DC-to-AC converter proposed by the present invention carries out sending for the reception, processing and control signal of data using dual processors,
It is responsible for digital signal acquiring and simple digital filtering from CPU, host CPU directly reads from CPU data and calculated, the two phase
Mutually coordinate, arithmetic speed can be improved, it is to avoid situation about being burned when volume of transmitted data is big, ectocine can be tracked in time and made rapidly
Go out reaction, the tracking to AC amplitude and phase is more accurate.
Brief description of the drawings
Fig. 1 is the control figure of the photovoltaic DC-to-AC converter master control dual processors according to the embodiment of the present invention.
Embodiment
With reference to the accompanying drawings and examples, the embodiment to the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
In one embodiment according to the application, with reference to Fig. 1 there is provided a kind of photovoltaic DC-to-AC converter, the photovoltaic DC-to-AC converter
Master board is controlled using master-slave cpu, and described to be responsible for digital signal acquiring and simple digital filtering from CPU, the host CPU is straight
Connect and read the data from CPU and calculated, it is real using digital signal processor (DSP) Serial Peripheral Interface (SPI) (SPI)
Connection and communication between existing two CSTR, SPI master can be selected or from operator scheme by setting MASTER/SLAVE.
In one embodiment according to the application, as MASTER/SLAVE=1, SPI is operated under host mode,
SPI main frames export clock signal on SPICLK pins, and clock is provided for whole serial communication network.SPIBRR registers are determined
The message transmission rate of communication network, 126 kinds of different baud rates can be configured by SPIBBR registers.SPI is from SPISIMO
Pin output data, and latch the input data on SPISOMI pins.
The data that SPIDAT or SPITXBUF registers start when writing data on SPISIMO pins are sent, and are sent first
Highest significant position；Meanwhile, the data that SPISOMI pins are received are displaced into SPIDAT registers, and what is moved at first is minimum
Significance bit.Send after the digit of setting, the data received are transferred in SPIRXBUF registers in case CPU is read.Number
Stored according in SPIRXBUF registers by the way of Right Aligns.
As MASTER/SLAVE=0, SPI is operated under slave mode, and SPISOMI pin output datas, SPISOMI draws
Pin input data.SPICLK pin incoming serial shift clocks, the clock is provided by SPI, and transmission speed is also determined by the clock,
SPICLK input clock frequency highest is no more than LSPCLK/4.
In one embodiment according to the application, when slave receives the SPICLK signals from main frame, SPICLK is appropriate
Hopping edge, the data in register SPIDAT or SPITXBUF are sent on spi bus.All words in SPIDAT registers
After symbol is all removed, it is written to the data of SPITXBUF registers and transfers in SPIDAT registers.
In one embodiment according to the application, when slave receives data, SPI waits the SPICLK letters from main frame
Number, in the appropriate hopping edges of SPICLK, just the data on SPISIMO pins are moved into SPIDAT registers.If slave
Data are sent while data are received, then SPITXBUF must be write data into before SPICLK starts or SPIDAT is posted
In storage.
The application also proposes a kind of control method of photovoltaic DC-to-AC converter, and the control method uses the principal and subordinate two of two-ways cpu
Plant mode of operation.
Under host mode, SPI main frames export clock signal on SPICLK pins, when being provided for whole serial communication network
Clock；SPIBRR registers determine the message transmission rate of communication network, by SPIBBR registers can configure 126 kinds it is different
Baud rate；SPI latches the input data on SPISOMI pins from SPISIMO pin output datas；SPIDAT or
The data that SPITXBUF registers start when writing data on SPISIMO pins are sent, and highest significant position is sent first；Meanwhile,
The data that SPISOMI pins are received are displaced into SPIDAT registers, and what is moved at first is least significant bit；Setting is sent
Digit after, the data received be transferred in SPIRXBUF registers in case CPU read, data are in SPIRXBUF registers
It is middle to be stored by the way of Right Aligns；
Under slave mode, SPISOMI pin output datas, SPISOMI pin input datas；SPICLK pin incoming serial
Shift clock, the clock is provided by SPI, and transmission speed is also determined by the clock, and SPICLK input clock frequency highest can not
More than LSPCLK/4；When slave receives the SPICLK signals from main frame, SPICLK hopping edges, register SPIDAT or
Data in SPITXBUF are sent on spi bus；After all characters in SPIDAT registers are all removed, it is written to
The data of SPITXBUF registers are transferred in SPIDAT registers；When slave receives data, SPI is waited from main frame
Data on SPISIMO pins, in SPICLK hopping edges, are just moved into SPIDAT registers by SPICLK signals；If from
Machine sends data while data are received, then SPITXBUF or SPIDAT must be write data into before SPICLK starts
In register.
The photovoltaic DC-to-AC converter carries out sending for the reception, processing and control signal of data using dual processors, is responsible for from CPU
Digital signal acquiring and simple digital filtering, host CPU directly read from CPU data and calculated, the two mutual cooperation, can
Improve arithmetic speed, it is to avoid situation about being burned when volume of transmitted data is big, ectocine can be tracked in time and reacted rapidly, it is right
The tracking of AC amplitude and phase is more accurate.
Finally, the present processes are only preferably embodiment, are not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc. should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of photovoltaic DC-to-AC converter, it is characterised in that Serial Peripheral Interface (SPI) of the photovoltaic DC-to-AC converter based on processor realizes master
Described to be used for digital signal acquiring and digital filtering from processor from processor control, the primary processor is used to directly read
The data from processor are simultaneously calculated.
2. a kind of photovoltaic DC-to-AC converter according to claim 1, it is characterised in that the processor is by designing serial peripheral
Interface realizes master slave mode.
3. a kind of photovoltaic DC-to-AC converter according to claim 2, it is characterised in that under host mode, primary processor exists
Clock signal is exported on SPICLK pins, for providing clock for whole serial communication network.
4. a kind of photovoltaic DC-to-AC converter according to claim 3, it is characterised in that the SPIBRR registers of the primary processor
Message transmission rate for determining communication network；Wherein, 126 kinds of different baud rates of SPIBBR register configurations are passed through.
5. a kind of photovoltaic DC-to-AC converter according to claim 4, it is characterised in that primary processor is used for from SPISIMO pins
Output data, and latch the input data on SPISOMI pins.
6. a kind of photovoltaic DC-to-AC converter according to claim 5, it is characterised in that the SPIDAT or SPITXBUF of primary processor
The data that register starts when writing data on SPISIMO pins are sent；Meanwhile, the data displacement that SPISOMI pins are received
Into SPIDAT registers, the data received are transferred in SPIRXBUF registers in case CPU is read.
7. a kind of photovoltaic DC-to-AC converter according to claim 2, it is characterised in that under slave mode, SPISOMI pins are used for
The serial shift clock that data transfer SPICLK pin incoming serial Peripheral Interface is provided, SPICLK input clock frequency is less than
LSPCLK/4。
8. a kind of photovoltaic DC-to-AC converter according to claim 7, it is characterised in that slave receives the SPICLK letters from main frame
Number when, SPICLK hopping edges, the data in register SPIDAT or SPITXBUF are sent on spi bus.
9. a kind of photovoltaic DC-to-AC converter according to claim 8, it is characterised in that all characters in SPIDAT registers are all
After removal, it is written to the data of SPITXBUF registers and transfers in SPIDAT registers.
10. a kind of control method of photovoltaic DC-to-AC converter, it is characterised in that using two kinds of mode of operations of principal and subordinate of two-ways cpu：
Under host mode, SPI main frames export clock signal on SPICLK pins, and clock is provided for whole serial communication network；
SPIBRR registers determine the message transmission rate of communication network；SPI latches SPISOMI from SPISIMO pin output datas
Input data on pin；
Under slave mode, SPISOMI pins transmission data, SPICLK pin incoming serial shift clocks；Slave, which is received, comes autonomous
During the SPICLK signals of machine, SPICLK hopping edges, the data in register SPIDAT or SPITXBUF are sent on spi bus；
After all characters in SPIDAT registers are all removed, the data for being written to SPITXBUF registers transfer to SPIDAT deposits
In device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710302309.XA CN107086808A (en) | 2017-05-02 | 2017-05-02 | A kind of photovoltaic DC-to-AC converter and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710302309.XA CN107086808A (en) | 2017-05-02 | 2017-05-02 | A kind of photovoltaic DC-to-AC converter and its control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107086808A true CN107086808A (en) | 2017-08-22 |
Family
ID=59613152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710302309.XA Pending CN107086808A (en) | 2017-05-02 | 2017-05-02 | A kind of photovoltaic DC-to-AC converter and its control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107086808A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202178719U (en) * | 2011-09-05 | 2012-03-28 | 华南理工大学 | Phase-shift soft-switching high frequency isolation photovoltaic grid-connected inverter |
| CN202513555U (en) * | 2012-04-16 | 2012-10-31 | 唐山电动车研发与检测有限公司 | DSP (Digital Signal Processor) digital control photovoltaic power generation inverter |
| CN203054827U (en) * | 2012-09-18 | 2013-07-10 | 格科微电子（上海）有限公司 | Data transmission system based on serial peripheral equipment interface bus |
| CN204012746U (en) * | 2014-07-31 | 2014-12-10 | 安徽明赫新能源有限公司 | The non-isolated photovoltaic combining inverter of 5KW |
| CN106502164A (en) * | 2016-12-02 | 2017-03-15 | 江苏兆伏新能源有限公司 | A kind of photovoltaic DC-to-AC converter device based on dual microcontroller |
-
2017
- 2017-05-02 CN CN201710302309.XA patent/CN107086808A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202178719U (en) * | 2011-09-05 | 2012-03-28 | 华南理工大学 | Phase-shift soft-switching high frequency isolation photovoltaic grid-connected inverter |
| CN202513555U (en) * | 2012-04-16 | 2012-10-31 | 唐山电动车研发与检测有限公司 | DSP (Digital Signal Processor) digital control photovoltaic power generation inverter |
| CN203054827U (en) * | 2012-09-18 | 2013-07-10 | 格科微电子（上海）有限公司 | Data transmission system based on serial peripheral equipment interface bus |
| CN204012746U (en) * | 2014-07-31 | 2014-12-10 | 安徽明赫新能源有限公司 | The non-isolated photovoltaic combining inverter of 5KW |
| CN106502164A (en) * | 2016-12-02 | 2017-03-15 | 江苏兆伏新能源有限公司 | A kind of photovoltaic DC-to-AC converter device based on dual microcontroller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103473141A (en) | Method for out-of-band check and modification of BIOS (basic input/output system) setting options | |
| CN102214154A (en) | USB (Universal Serial Bus)-based communication module and communication method for alternating current servo driver | |
| CN101556722B (en) | Method for constructing high-efficiency fiscal cash register under cooperation of multi-CPU | |
| CN105891764A (en) | Watt-hour meter data intelligent reading-writing device and watt-hour meter data intelligent reading-writing method based on Bluetooth communication | |
| CN205862322U (en) | A kind of SPI/I2C interface convertor based on FPGA | |
| CN102736594A (en) | Modular design method of unified platform of intelligent power distribution terminal | |
| CN114443067B (en) | CPLD (complex programmable logic device) file burning system and CPLD file burning method | |
| CN206698146U (en) | A kind of photovoltaic DC-to-AC converter | |
| CN107086808A (en) | A kind of photovoltaic DC-to-AC converter and its control method | |
| CN104077258B (en) | The interoperability methods of SPI and Localbus and its application | |
| CN107370651A (en) | A kind of communication means between SPI slaves | |
| CN208128284U (en) | A kind of Ethernet based on S698PM turns Multi-path synchronous serial interface communication apparatus | |
| CN203849590U (en) | Multi-shaft motion numerical control system | |
| CN106647474B (en) | A kind of photovoltaic DC-to-AC converter software architecture system based on multicore microcontroller | |
| CN205081473U (en) | Double -core dc -to -ac converter module communication system's control circuit board based on DSP+FPGA | |
| CN108628793A (en) | SPI communication circuit and method | |
| CN204695305U (en) | A kind of SPI communication interface based on joint product and this joint product | |
| CN209640857U (en) | A kind of ULSIC timing closure device | |
| CN104503934B (en) | A kind of expansible serial transmission device | |
| CN207543138U (en) | A kind of data transmission system of more industrial bus | |
| CN207764780U (en) | printer core control system based on FPGA | |
| CN201166836Y (en) | Converter for double-input single-output signal | |
| CN202600420U (en) | Double-CPU circuit of power supply monitor of transformer substation | |
| CN101763031B (en) | System for intelligently leading in and checking control strategy of safety auto-mechanism | |
| CN201378876Y (en) | Handheld communication terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170822 |
|
| RJ01 | Rejection of invention patent application after publication |