CN105577014A - Double-MCU based numerical control inverter power supply and control method - Google Patents
Double-MCU based numerical control inverter power supply and control method Download PDFInfo
- Publication number
- CN105577014A CN105577014A CN201610019530.XA CN201610019530A CN105577014A CN 105577014 A CN105577014 A CN 105577014A CN 201610019530 A CN201610019530 A CN 201610019530A CN 105577014 A CN105577014 A CN 105577014A
- Authority
- CN
- China
- Prior art keywords
- mcu
- power supply
- numerical control
- controller
- signal
- 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
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
-
- 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
- H02M7/539—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 with automatic control of output wave form or frequency
- H02M7/5395—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 with automatic control of output wave form or frequency by pulse-width modulation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention relates to the technical fields of power electronics and automation control, in particular to a double-MCU based numerical control inverter power supply and a control method. The double-MCU based numerical control inverter power supply comprises a main loop, a double-MCU controller, an ADC collecting module and an external connection controller; high-speed two-machine communication is carried out through an SPI and a UART between a main MCU and a slave MCU; the main MCU is used for PWM pulse signal output fault protection output and detection signal input of various switching power supply topological structures, and the slave MCU is used for commonly-used human-computer interfaces of switching power supplies, so that wide connection characteristics are realized; meanwhile, the burden of the main MCU can be greatly reduced, and high-reliability, high-efficiency and low-cost digital control for the inverter power supply is realized; moreover, the main MCU can communicate with the slave MCU only when data are updated, most time is spent for data collection and data processing, the programming of codes is simplified, and multiple-person cooperation can be realized for independent programming together.
Description
Technical field
The present invention relates to power electronics and technical field of automatic control, relate to a kind of based on two MCU numerical control inversion power supply and control method specifically.
Background technology
Along with the fast development of power electronics and Automated condtrol industry, the requirement raising gradually of logarithm control inverter control technology, high-quality, a good inverter need to possess certain condition: input high power factor; Export Low ESR; During stable state, precision is high; During transient state, response is fast; Good stability; Reliability is high; Real-time is controlled well; Electromagnetic disturbance is little; There is higher efficiency; And digital Control Technology and software control algorithm are the important method solving existing numerical control inversion power issue.
For solving the problem, Authorization Notice No. is that Authorization Notice No. CN202475301U discloses a kind of inverter, comprise push-pull converter, DC/AC bridge converter, input voltage sampling module, output voltage sampling module, and MCU control module, this MCU control module is connected with described input voltage sampling module, described output voltage sampling module and described output current sampling module respectively, gather the described signal exported from above-mentioned three modules, and the described signal gathered is carried out A/D conversion; Also be connected with PWM driver module, and described pwm control signal can be adjusted according to the described output current of described output current sampling module gathered and the described output voltage of described input voltage sampling module, and export described pwm control signal to described PWM driver module, regulate PWM duty ratio, make the output voltage of described push-pull converter can follow described input voltage and the change of described output current.This kind of inverter circuit adopts single MCU to realize a multi-functional numerical control inversion power supply, although fairly simple in hardware designs, will to decline and software programming is also comparatively complicated for the reliability of a system, performance and efficiency.
Summary of the invention
In order to overcome deficiency of the prior art, the invention provides a kind of based on two MCU numerical control inversion power supply and control method.
For achieving the above object, the technical solution used in the present invention is: based on two MCU numerical control inversion power supply, it is characterized in that: comprise major loop, two MCU controller, ADC acquisition module, external controller.
Major loop comprises Boost circuit, H-bridge drive circuit and H-bridge inverter circuit, this Boost circuit is connected with power module, H-bridge drive circuit is connected with Boost circuit, and the alternating voltage exported after the direct voltage for Boost circuit is exported carries out phse conversion is delivered to H-bridge inverter circuit;
ADC acquisition module for gathering the voltage signal of Boost circuit, and exports two MCU controller after shaping to after filtering;
Two MCU controller, comprise main MCU and from MCU, described main MCU and ADC acquisition module connects the system data for receiving the collection of ADC acquisition module and changes into PWM output after carrying out signal transacting, described from MCU for being connected with ambient controller, while communicates with between host computer, this main MCU and carry out two machine communication by SPI and UART from MCU, and have main MCU more new data time just with from MCU communication.
Optimize, main MCU is Piccolo series DSP controller, is NuMicroNUC140 controller from MCU.
Optimize, the pwm signal that main MCU changes according to digital signal is exported by three tunnels, inputs Boost circuit, H-bridge drive circuit and H-bridge inverter circuit respectively.
Optimize, external controller comprises display and keyboard.
Optimize, also comprise accessory power supply, this accessory power supply is connected with two MCU controller.
Optimize, ADC acquisition module rear class is provided with a clamp diode.
Based on the control method of two MCU numerical control inversion power supply, it is characterized in that: described in claim 1 to 6 any one based on two MCU numerical control inversion power supply, more during new data, concrete steps are as follows:
Step 1, control appliance is by sending preset value from MCU to main MCU;
Step 2, the pwm control signal of input Boost circuit interrupts;
Step 3, the voltage signal of the Boost circuit gathered by ADC acquisition module, and collection signal is transferred to main MCU;
Step 4, main MCU calculates according to ADC acquisition module collection signal, beams back data and also by exporting new pwm control signal, change the duty ratio of PWM to data after MCU, simultaneously adjustment after adjustment;
Step 5, power module is carried out dc voltage boost conversion output voltage according to the pwm control signal upgraded and reaches predetermined value by Boost circuit.
Further, in step 3 during the sampling of ADC acquisition module, hardware adopts low pass filter carry out filtering process, carry out the filtering of software simultaneously, this software filtering gathers ten data with AD, first keeps only having ten numbers at the algorithm be averaging ten numbers to data processing first in first out.
Further, add PID when the main MCU of step 4 calculates to calculate.
Further, when the main MCU of step 4 calculates, the PWM usable floor area method of equal effect produces a series of contour not wide square wave, finally by the mode of tabling look-up to realize SPWM inversion.
From the above-mentioned description of this invention, provided by the invention based on two MCU numerical control inversion power supply and control method, its main MCU and carry out high speed two machine communication by SPI and UART between MCU, wherein main MCU inputs with detection signal for the pwm pulse signal output error protection output of multiple switch power supply topological structure, and multi-channel DC, exchange, the input of Pulse analog and detection, from MCU then for being connected with ambient controller, realize connection performance widely, greatly can reduce the burden of main MCU simultaneously, realize the high reliability of inverter, high efficiency, the Digital Control of low cost, in addition main MCU only when more new data just with from MCU communication, most of time is in image data and deal with data, and the coding of simplified code also can realize the common independent coding of multi agent cooperation.
Accompanying drawing explanation
Fig. 1 is the general frame that the present invention is based on two MCU numerical control inversion power supply.
Fig. 2 is the topology diagram of Boost circuit.
Fig. 3 is topological structure and the schematic diagram of H-bridge inverter circuit.
Fig. 4 is the control flow chart based on two MCU numerical control inversion power supply.
Fig. 5 is the figure that lookup table mode produces SPWM.
Embodiment
Below by way of embodiment, the invention will be further described.
With reference to shown in Fig. 1, based on two MCU numerical control inversion power supply, comprise major loop, two MCU controller, ADC acquisition module, external controller, accessory power supply, wherein major loop comprises Boost circuit, H-bridge drive circuit and H-bridge inverter circuit, and external controller comprises display and keyboard;
Boost circuit is connected with power module, as control MOSFET pipe S
2in the on-state, then input voltage U
senergy storage will be carried out to inductance L, simultaneously diode S with constant electric current
2reverse cut-off, ensures that inductive energy storage is normal, makes output capacitance C
2load is powered.As control MOSFET pipe S
2under being in off-state, then input voltage U
sto load supplying together with the energy that inductance L is put aside, the object of boosting so just can be reached.
The output voltage of Boost translation circuit is:
Wherein α is expressed as the duty ratio that MCU exports PMW waveform, U
0be expressed as the output voltage of Boost translation circuit, U
sbe expressed as the input power of Boost translation circuit;
H-bridge drive circuit is connected with Boost circuit, the alternating voltage exported after direct voltage for Boost circuit is exported carries out phse conversion is delivered to H-bridge inverter circuit, mainly realize DC power supply be converted into AC power, as control MOSFET pipe S by the frequency that turns on and off of controller to MOSFET
1and S
2conducting simultaneously, MOSFET pipe S
3and S
4when turning off, then simultaneously output voltage U
lby output one on the occasion of AC signal, as control MOSFET pipe S
3and S
4conducting simultaneously, MOSFET pipe S
1and S
2when turning off, then simultaneously output voltage U
lby output negative value AC signal, so just energy output AC signal, the frequency of AC signal controls sinusoidal signal frequency by the adjustment carrier frequency of controller, and the amplitude of sinusoidal signal is controlled by the carrier amplitude of controller;
ADC acquisition module is for gathering the voltage signal of Boost circuit, and export two MCU controller after filtering after shaping to, ADC acquisition module input voltage must not require more than 3.3V, but many times extraneous input voltage is not in the voltage 0-3.3V required for controller, therefore need to zoom in or out signal with a discharge circuit, signal within the scope of required voltage, can be added a clamp diode in ADC acquisition module rear class rear class and makes voltage reach in the range of voltage values of chip demand;
Two MCU controller, comprise main MCU and from MCU, main MCU is Piccolo series DSP controller, be NuMicroNUC140 controller from MCU, described main MCU and ADC acquisition module connects the system data for receiving the collection of ADC acquisition module and changes into PWM output after carrying out signal transacting, the pwm signal that main MCU changes according to digital signal is exported by three tunnels, input Boost circuit respectively, H-bridge drive circuit and H-bridge inverter circuit, described is be connected with ambient controller from MCU, communicate with between host computer simultaneously, this main MCU and carry out two machine communication by SPI and UART from MCU, and have main MCU more new data time just with from MCU communication.
Accessory power supply, this accessory power supply is inverse-excitation type switch power-supply, and this inverse-excitation type switch power-supply is connected with two MCU controller and is used for powering to it.
With reference to shown in Fig. 4, based on the control method of two MCU numerical control inversion power supply, based on above-mentioned pair of MCU numerical control inversion power supply, more during new data, concrete steps are as follows:
Step 1, control appliance is by sending preset value from MCU to main MCU;
Step 2, the pwm control signal of input Boost circuit interrupts;
Step 3, the voltage signal of the Boost circuit gathered by ADC acquisition module, and collection signal is transferred to main MCU, during the sampling of ADC acquisition module, for the interference signal in reduction sampling is on the impact of system, hardware adopts low pass filter carry out filtering process, carry out the filtering of software simultaneously, this software filtering gathers ten data with AD, first keeps only having ten numbers at the algorithm be averaging ten numbers to data processing first in first out;
Step 4, main MCU calculates according to ADC acquisition module collection signal, beams back data and also by exporting new pwm control signal, change the duty ratio of PWM to data after MCU, simultaneously adjustment after adjustment;
Step 5, power module is carried out dc voltage boost conversion output voltage according to the pwm control signal upgraded and reaches predetermined value by Boost circuit.
In step 4, add PID when main MCU calculates and calculate, PID is proportional-integral derivative controller, and the input/output relation of pid control algorithm is as follows:
Its input e (t) with the pass exporting u (t) is:
u(t)＝kp[e(t)+1/TI∫e(t)dt+TD×de(t)/dt](1)
u(t-1)＝kp[e(t-1)+1/TI∫e(t-1)dt+TD×de(t-1)/dt](2)
In formula: kp is proportionality coefficient; TI is integration time constant; TD is derivative time constant.
Obtain after arrangement:
△u(t)＝kpe(t)+kie(t)+kd(△e(t)-△e(t-1))
When the main MCU of step 4 calculates, the PWM usable floor area method of equal effect produces a series of contour not wide square wave, finally by the mode of tabling look-up to realize SPWM inversion.
Main MCU produces SPWM waveform, specific implementation is mainly by inquiry sine table method, in the present embodiment is the sine table of 500 some half period, the value of its expression formula 0.5+0.5*sin (t) leaves in main MCU, the value of t gets 0-π, this Zhi Gei mono-tunnel shown had the PWM passage of complementary function, as the duty ratio of PWM, because sine wave is in a center of symmetry, so just can by substituting half waveform below with the waveform of half, namely give another road PWM passage of complementary function, due to export PWM can not be less than 0 or be greater than 1 value;
Sine table curve chart as shown in Figure 5, in figure, abscissa is expressed as the cycle, ordinate is expressed as amplitude, first 500 deciles are split to a sinusoidal wave half waveform, then according to A*sin (t) rule change generation one group of data, wherein the span of t=(n/m) * π is 0-π, this is organized Plotting data is out a half-sinusoid, size wherein by changing A value just can change sinusoidal wave peak, the frequency changing SPWM can, by changing modulation ratio, be exactly then here the ratio changing (n/m).In software programming, just can be designed the table of a generation sinusoidal signal by this relation by the method for tabling look-up, and this is shown us and just can be referred to as sine table.
Above-mentioned main MCU and carry out high speed two machine communication by SPI and UART between MCU, wherein main MCU inputs with detection signal for the pwm pulse signal output error protection output of multiple switch power supply topological structure, and multi-channel DC, exchange, the input of Pulse analog and detection, then (LCD is comprised for the conventional Human machine interface of Switching Power Supply from MCU, KEY etc.), carry out pwm pulse by rotary encoder to catch, by drawing serial ports outward, realize connection performance (RS232 serial communication widely, RS485 bus, CAN etc.), greatly can reduce the burden of main MCU simultaneously, the respective advantageous design of each single-chip microcomputer is utilized to go out to have high reliability, high efficiency, the Digital Control inverter of low cost.
Although this theme with the language description that method action is special, is appreciated that subject matter defined in the appended claims is not necessarily limited to the order of above-mentioned feature or action or above-mentioned action.More specifically, described characteristic sum action be as realize claims exemplary forms and disclosed in.The application can be embodied as other concrete form and not deviate from its spirit or substantive characteristics.Described embodiment all should be considered to be only illustrative and nonrestrictive in all respects.Therefore, the scope of the application by appended claims but not aforementioned description instruction.Fall in the implication of the equivalents of claims and scope change all contain by the scope of claims.
Claims (10)
1. based on two MCU numerical control inversion power supply, it is characterized in that: comprise major loop, two MCU controller, ADC acquisition module, external controller;
Major loop comprises Boost circuit, H-bridge drive circuit and H-bridge inverter circuit, this Boost circuit is connected with power module, H-bridge drive circuit is connected with Boost circuit, and the alternating voltage exported after the direct voltage for Boost circuit is exported carries out phse conversion is delivered to H-bridge inverter circuit;
ADC acquisition module for gathering the voltage signal of Boost circuit, and exports two MCU controller after shaping to after filtering;
Two MCU controller, comprise main MCU and from MCU, described main MCU and ADC acquisition module connects the system data for receiving the collection of ADC acquisition module and changes into PWM output after carrying out signal transacting, described from MCU for being connected with ambient controller, while communicates with between host computer, this main MCU and carry out two machine communication by SPI and UART from MCU, and have main MCU more new data time just with from MCU communication.
2. according to claim 1 based on two MCU numerical control inversion power supply, it is characterized in that: described main MCU is Piccolo series DSP controller, is NuMicroNUC140 controller from MCU.
3. according to claim 1 and 2 based on two MCU numerical control inversion power supply, it is characterized in that: the pwm signal that described main MCU changes according to digital signal is exported by three tunnels, inputs Boost circuit, H-bridge drive circuit and H-bridge inverter circuit respectively.
4. according to claim 1 based on two MCU numerical control inversion power supply, it is characterized in that: described external controller comprises display and keyboard.
5. according to claim 1ly it is characterized in that: also comprise accessory power supply based on two MCU numerical control inversion power supply, this accessory power supply is connected with two MCU controller.
6. according to claim 5 based on two MCU numerical control inversion power supply, it is characterized in that: described ADC acquisition module rear class is provided with a clamp diode.
7., based on the control method of two MCU numerical control inversion power supply, it is characterized in that: described in claim 1 to 6 any one based on two MCU numerical control inversion power supply, more during new data, concrete steps are as follows:
Step 1, control appliance is by sending preset value from MCU to main MCU;
Step 2, the pwm control signal of input Boost circuit interrupts;
Step 3, the voltage signal of the Boost circuit gathered by ADC acquisition module, and collection signal is transferred to main MCU;
Step 4, main MCU calculates according to ADC acquisition module collection signal, beams back data and also by exporting new pwm control signal, change the duty ratio of PWM to data after MCU, simultaneously adjustment after adjustment;
Step 5, power module is carried out dc voltage boost conversion output voltage according to the pwm control signal upgraded and reaches predetermined value by Boost circuit.
8. the control method based on two MCU numerical control inversion power supply according to claim 7, it is characterized in that: in step 3 during the sampling of ADC acquisition module, hardware adopt low pass filter carry out filtering process, carry out the filtering of software simultaneously, this software filtering gathers ten data with AD, first keeps only having ten numbers at the algorithm be averaging ten numbers to data processing first in first out.
9. the control method based on two MCU numerical control inversion power supply according to claim 7, is characterized in that: add PID when the main MCU of described step 4 calculates and calculate.
10. the control method based on two MCU numerical control inversion power supply according to claim 7 or 9, it is characterized in that: when the main MCU of described step 4 calculates, the PWM usable floor area method of equal effect produces a series of contour not wide square wave, finally by the mode of tabling look-up to realize SPWM inversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610019530.XA CN105577014A (en) | 2016-01-13 | 2016-01-13 | Double-MCU based numerical control inverter power supply and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610019530.XA CN105577014A (en) | 2016-01-13 | 2016-01-13 | Double-MCU based numerical control inverter power supply and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105577014A true CN105577014A (en) | 2016-05-11 |
Family
ID=55886799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610019530.XA Pending CN105577014A (en) | 2016-01-13 | 2016-01-13 | Double-MCU based numerical control inverter power supply and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105577014A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106059350A (en) * | 2016-05-31 | 2016-10-26 | 东莞市思普电子有限公司 | AC wide-frequency conversion power supply |
| CN108089491A (en) * | 2017-11-28 | 2018-05-29 | 武汉合康智能电气有限公司 | A kind of multi-channel-CAN communication bus ports-Extending method and system |
| CN108268002A (en) * | 2017-12-14 | 2018-07-10 | 深圳市显控科技股份有限公司 | A kind of combination HMI and the all-in-one machine and communication means of PLC functions |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090279336A1 (en) * | 2008-05-09 | 2009-11-12 | Optisolar, Inc. | Inverter modulator with variable switching frequency |
| CN102157959A (en) * | 2011-03-30 | 2011-08-17 | 华南理工大学 | Solar photovoltaic contravariant generating system and operation method thereof |
| CN204030626U (en) * | 2014-07-14 | 2014-12-17 | 广东省自动化研究所 | A kind of photovoltaic combining inverter based on dual processor |
-
2016
- 2016-01-13 CN CN201610019530.XA patent/CN105577014A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090279336A1 (en) * | 2008-05-09 | 2009-11-12 | Optisolar, Inc. | Inverter modulator with variable switching frequency |
| CN102157959A (en) * | 2011-03-30 | 2011-08-17 | 华南理工大学 | Solar photovoltaic contravariant generating system and operation method thereof |
| CN204030626U (en) * | 2014-07-14 | 2014-12-17 | 广东省自动化研究所 | A kind of photovoltaic combining inverter based on dual processor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106059350A (en) * | 2016-05-31 | 2016-10-26 | 东莞市思普电子有限公司 | AC wide-frequency conversion power supply |
| CN108089491A (en) * | 2017-11-28 | 2018-05-29 | 武汉合康智能电气有限公司 | A kind of multi-channel-CAN communication bus ports-Extending method and system |
| CN108089491B (en) * | 2017-11-28 | 2019-04-02 | 武汉合康智能电气有限公司 | A kind of multi-channel-CAN communication bus ports-Extending method and system |
| CN108268002A (en) * | 2017-12-14 | 2018-07-10 | 深圳市显控科技股份有限公司 | A kind of combination HMI and the all-in-one machine and communication means of PLC functions |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102005960B (en) | Inverter with three bridge arms and nine switches for dual-alternating-current motor drive and control method thereof | |
| CN201430540Y (en) | Z-source inverter controlling system with FPGA based on DSP | |
| CN101764529B (en) | Method for restricting midpoint potential drifting of three-level inverter in direct drive wind power system | |
| CN102780221A (en) | System and method for controlling online type photovoltaic power generation microgrid without storage device | |
| CN102856916A (en) | Reactive power control method and circuit of single-phase photovoltaic inverter | |
| CN103326606B (en) | A kind of one-phase five-level inverter | |
| CN102856928B (en) | A kind of inverter | |
| CN103166489A (en) | Control circuit for three-phase high power factor rectifier | |
| CN102496933B (en) | Double parallel active power filtering apparatus | |
| CN105577014A (en) | Double-MCU based numerical control inverter power supply and control method | |
| CN102684518B (en) | High-frequency redundancy PWM (pulse-width modulation) rectifier device and method based on instantaneous current feedforward control | |
| CN102857132A (en) | Interleaving fly-back photovoltaic inverter | |
| CN104883042A (en) | Method and device for processing output voltage ripple of charger | |
| CN203193537U (en) | Two-stage three-level three-phase photovoltaic grid-connected inverter | |
| CN107645246A (en) | A kind of two-stage type single-phase inverter | |
| CN102158109A (en) | Photovoltaic synchronization inverter system | |
| CN202678980U (en) | Three-phase photovoltaic grid-connection system based on novel Z-source inverter | |
| CN207743895U (en) | A kind of two-stage type single-phase inverter | |
| CN203104294U (en) | Modularized highly efficient DC/DC converter | |
| CN203151389U (en) | Control circuit of three-phase high power factor rectifier | |
| CN210201735U (en) | High-power switching power supply control circuit | |
| CN203562977U (en) | Photovoltaic inverter of Buck-Boost type topological structure | |
| CN203788183U (en) | Vehicle-mounted inverter | |
| CN103078348B (en) | No-signal interconnection line parallel-connection three-phase inverter and control method thereof | |
| CN202737480U (en) | Photovoltaic grid-connected inverter with high frequency link |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160511 |