CN201302679Y - High-precision digital power supply control adjuster - Google Patents
High-precision digital power supply control adjuster Download PDFInfo
- Publication number
- CN201302679Y CN201302679Y CNU2008202225762U CN200820222576U CN201302679Y CN 201302679 Y CN201302679 Y CN 201302679Y CN U2008202225762 U CNU2008202225762 U CN U2008202225762U CN 200820222576 U CN200820222576 U CN 200820222576U CN 201302679 Y CN201302679 Y CN 201302679Y
- Authority
- CN
- China
- Prior art keywords
- precision
- regulator
- digital signal
- pid
- power supply
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Feedback Control In General (AREA)
Abstract
The utility model discloses a high-precision digital power supply control adjuster, which comprises a programmable digital signal processor and a feedback signal conversion device, wherein a soft core control unit module and a high-precision closed-loop regulating software module are embedded in the digital signal processor, and the soft core control unit module and the high-precision closed-loop regulating software module are connected through an on-chip data bus, and the high-precision closed-loop regulating software module comprises a digital setting module, a main PID (or PI) operation regulator, an auxiliary PID operation regulator, a high-precision PWM signal generator, a main digital feedback signal filter, an auxiliary digital feedback single filter and the like. The high-precision digital power supply control adjuster can control and adjust various functional blocks in the high-precision closed-loop regulating software module through embedding the soft core control unit module, and reaches high-precision control to output signals. The high-precision digital power supply control adjuster can totally replace existing high-precision analogy regulator products at home and abroad, whose total property is better than analogy products when comprehensively considering from economic cost, reconfiguration and control precision.
Description
Technical field
The utility model relates to high precision high capacity switch power technology field, particularly large-scale physics laboratory employed accelerator magnet contactor power supply.
Background technology
In recent years, the high precision Switching Power Supply is at basic science, and increasing effect is being brought into play in fields such as biology and medical treatment.The domestic employed controlled adjuster of high capacity high-precision power that has put into operation at present all is an analog equipment.Its hardware circuit is seen Fig. 1, and represented in the double dot dash line among Fig. 1 is exactly to simulate the high precision regulator: mainly be made of 4 parts, be respectively:
A1: high precision given circuit.Common constituted mode has two kinds, and a kind of is that the potentiometer that adopts high-precision aanalogvoltage benchmark (general integrated circuit (IC) products) to add high precision generates the given signal of adjustable high-precision analog; Another is to adopt simple numerical chip (digital signal processor DSP or single-chip microcomputer) to add that high precision DA (digital/analog converter) generates the given signal of adjustable high-precision analog;
A2: high Accuracy PID regulator or PI regulating circuit (P: the English initial of " ratio ", I: the English initial of " integration ", D: the English initial of " differential ").A2 is generally the current closed-loop regulator.Present simulation high precision regulating circuit mainly all adopts high-precision integrated operational amplifier and formations such as high-precision resistance, electric capacity.The place one's entire reliance upon performance of above-mentioned device of the operational precision of regulating circuit;
A3: high Accuracy PID regulator or PI regulating circuit.A3 is generally the auxiliary signal closed-loop regulator, as the Voltage loop regulator;
A4: high-precision PWM (Pulse Width Modulation, pulse-length modulation) signal generating circuit.Generally adopt at present external PWM controller chip, the reference wave generator of it is inner integrated high-precision comparer and high stable is as triangular-wave generator etc.This circuit unit is according to different 1 road or 2 road or 4 road pwm signals that generate of the topological structure of power converter.
The workflow of analog regulator is: the error signal e that the feedback Ifd signal of given signal Iref that A1 produces and A9 output relatively produces is sent into PID or pi regulator A2, the output of A2 again with auxiliary backfeed loop A10 output valve relatively produce auxiliary difference, this difference is sent into subring regulator (being made of PID or PI etc.) A3, output modulated voltage signal m produces pwm signal through after the analog signal processing of A4 again after its high-precision analog is regulated.
In the above-mentioned workflow, the high precision feedback circuit except regulator, the discrete device of regulator inside comprise the device precision of resistance, electric capacity and Analogous Integrated Electronic Circuits and output accuracy that performance is having a strong impact on power supply and consistance etc.
In addition, more than the control and the communication of simulation high precision Switching Power Supply must be finished by other auxiliary circuit or interface circuit.Shortcomings such as so the analog regulation control circuit exists control accuracy to be limited by device precision and performance, and homogeneity of product is poor, the parameter tuning inconvenience, and temperature drift is wide.Even still there are problems such as the inconsistent and component ageing of parameters precision in the special-purpose integrated control chip of simulation, the employed discrete component of its peripheral circuit.Problems such as in addition, the simulation integrated chip exists also that power consumption is big, integrated level is low, control underaction and versatility are not strong.
And in the domestic existing digitizing power supply control regulating, particularly in the high-precision power field, digital governer does not almost have the product of moulding.
The utility model content
Be limitation and the deficiency that overcomes prior art, the utility model provides a kind of high accuracy number controlled adjuster that use in the high-precision power field that aims at, replace simulation control with the digitizing control technique, in order to eliminate the shortcoming that conventional simulation regulators such as temperature drift are difficult to overcome, helping parameter tuning and variable element regulates, be convenient to adjust controlling schemes easily and realize multiple Novel Control by the change of program software, reduce number, the simplification hardware configuration of components and parts simultaneously, thereby improve the reliability of system, guarantee the output accuracy and the consistance of power supply.
For achieving the above object, adopt following technical scheme: a kind of high precision digital power supply control regulating, mainly by programmable digital signal processor spare, the feedback signal switching device is formed, programmable digital signal processor spare forms closed loop by its internal regulation Control Software and feedback signal switching device and is connected, embed soft nuclear control unit module and high precision closed loop adjusting software module in the described programmable digital signal processor spare, both connect by data bus in the sheet; Described high precision closed loop is regulated software module and is made up of the given module of numeral, main PID or PI computing regulator, auxiliary PID computing regulator, High-Accuracy PWM signal generator, main digital feedback signal wave filter and auxiliary figure feedback signal wave filter etc.; Its annexation is as follows:
The given module of numeral compares back generated error signal e1 according to the primary feedback signal f1 of given signal r of the high resolving power that presets in the PC control output chip and the output of primary feedback digital signal filter device real-time continuous, and sends into main PID or PI computing regulator;
After the error signal e 1 main PID of process or inner PID of PI computing regulator or the PI digital operation, the auxiliary feedback signal f2 of its output valve and the output of auxiliary figure feedback signal wave filter compares and obtains error signal e 2, and sends into auxiliary PID computing regulator;
Error signal e 2 is exported index of modulation m after assisting the inner pid number computing of PID computing regulator, then generate needed pwm signal through the High-Accuracy PWM signal generator.
Described high precision digital power supply control regulating can connect external memory storage, the Flash storer that is used for storage of subscriber data, ethernet controller, serial communication controller, series arrangement device etc., cooperate upper system software can realize the networking control of power-supply system easily, external memory storage wherein, storage of subscriber data Flash storer, ethernet controller, serial communication controller is connected with the respective pins IO of programmable digital signal processor spare respectively, these connections have comprised address wire, data line and control line, and control its work by the soft nuclear control unit module in the programmable digital signal processor spare; Described series arrangement device is connected with the special pin of programmable digital signal processor spare, finishes the initialization to programmable digital signal processor spare when powering in system automatically.
The beneficial effects of the utility model
1, the utility model is compared with analog control technique, and chip piece has replaced the A1 in the analog control loop to four control circuits of A4, has effectively simplified hardware module, has but significantly improved its versatility and ease for use, has improved system reliability.
2, if the controlling object and the load of power supply change, can realize by the change of regulating Control Software, need not to redesign hardware.Than analog feedback system, its dirigibility improves greatly, and has reduced the reconstruct cost
3, can carry out comprehensive Power Supply Monitoring and diagnosis by PC.
4, power supply and the interface of far controlling control system become the part of the digitial controller of power supply, far control the easier realization of communication function than simulation system.
5, digitized congenital advantage helps to realize the intellectuality control of power-supply system, as data storage, fault diagnosis, network communication etc.
6, the testing scheme of output stability of the present utility model and result are as follows:
On the Switching Power Supply of H bridge construction, digital power supply control regulating is carried out the overall performance test.The power device of major loop adopts SKM75GB123D 1200V/75A IGBT.Design specified being output as ± 20V/10A.Current feedback adopts LEM current sensor LA 25-NP, and voltage sensor adopts the LEM LV25-P of company.
The testing power supply mode of operation: test is operated under the Chopper circuit-mode with power supply, promptly is used to drive IGBT1 with high accuracy number power-supply controller of electric output High-Accuracy PWM signal, makes IGBT4 be operated in long logical state, blocks IGBT2 and IGBT3 simultaneously.Regulative mode is an electric current list closed loop adjustment.Wherein U3 and U4 are respectively applied for the sampling of output current and output voltage, are used for digital closed loop after the DAC conversion of sampling output valve in digital control regulator.
Test parameter:
Load parameter: resistance R m=5.8 Ω, inductance L m=2.4mH
Output voltage: 17.32V
Output current: 3A
Dutycycle: 86%
Testing tool: 8 half voltage tables 7081, TEK digital oscilloscope TDS3032
By appropriate software parameter testing and optimization, the continuous 8 hours degree of stability of electric power outputting current that record under the high accuracy number regulator are 7.1e-5, have reached higher current stability.
Realized High Accuracy Control to power supply output by the visible the utility model of above test, its regulative mode is more flexible than the simulation controlled adjuster.Obviously, the utility model is the inside and outside existing high-precision analog regulator product of subrogate country fully, and its overall performance is taken all factors into consideration from financial cost, reconfigurability and control accuracy and more is better than analog equipment.
Description of drawings
Fig. 1 is the high precision Switching Power Supply hardware block diagram that has the high-precision analog regulator;
Fig. 2 is the utility model programmable digital signal processor spare A2 regulating and controlling schematic diagram;
Fig. 4 is a system controlling software process flow diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
One, the selection of the main components and parts of the utility model:
Programmable digital signal processor spare B2-monolithic on-site programmable gate array FPGA, adopt the CYCLONE II series EP2C70 device of U.S. altera corp, belong to reconfigurable device, its internal logic function can be programmed arbitrarily as required, has the fast and efficient advantages of higher of integrated level height, processing speed.Its structure mainly is divided into three parts, i.e. FPGA (Field Programmable Gate Array) piece, programmable I/O module and interconnector able to programme.Because the integrated level of FPGA is very big, a slice FPGA is several thousand equivalent gates at least, at most several ten thousand or a hundreds of thousands equivalent gate, so a slice FPGA just can realize very complicated logic, substitute the circuit that polylith integrated circuit and discrete component are formed, its main tool of carrying out system design is a Hardware Description Language VHDL.So utilize this FPGA than being easier to realize the controlling schemes shown in Fig. 2.
Feedback signal switching device-1 tunnel adopts 24/20.8k SPS high-precision low-power consumption ADC, model: ADS1251; 1 the tunnel adopts 18/500k SPS high-precision adc, model: ADS8382.
Two, the controlling schemes of each module in the utility model core devices FPGA, as Fig. 2:
Among the programmable digital signal processor spare B2, promptly embed soft nuclear control unit module S1 and high precision closed loop adjusting software module S2 in the FPGA sheet, both connect by data bus in the sheet; Described high precision closed loop is regulated software module S2 and is made up of the given module U1 of numeral, main PID or PI computing regulator U2, auxiliary PID computing regulator U3, High-Accuracy PWM signal generator U4, main digital feedback signal wave filter U5 and auxiliary figure feedback signal wave filter U6 etc.; Its annexation is as follows:
The given module U1 of numeral is according to the given signal r of high resolving power that presets in the host computer B1 control output chip, compare back generated error signal e1 with the primary feedback signal f1 of primary feedback digital signal filter device U5 real-time continuous output, and send into main PID or PI computing regulator U2;
After the error signal e 1 main PID of process or inner PID of PI computing regulator U2 or the PI digital operation, the auxiliary feedback signal f2 of its output valve and auxiliary figure feedback signal wave filter U6 output compares and obtains error signal e 2, and sends into auxiliary PID computing regulator U3;
Error signal e 2 is exported index of modulation m after assisting the inner pid number computing of PID computing regulator U3, then generate needed pwm signal through High-Accuracy PWM signal generator U4.
For guaranteeing that the utility model reaches required high control accuracy, the computing based on floating number is all adopted in all computings in U1～U6 module, and control algolithm adopts revises pid control algorithm, and all realizes with the VHDL software language.
The transport function of described correction pid control algorithm is as follows:
In the above-mentioned formula, the Kp in the equal sign right-hand side expression is taken advantage of into bracket, this expression formula will be transformed into three polynomial expression sums, and these three polynomial expressions are exactly ratio (P), integration (I) and differential (D) polynomial expression successively.Here it is, and high accuracy number is regulated the foundation of computing.
Described High-Accuracy PWM signal generator is exactly in the utility model the part that can not accurately be controlled in the floating number of its processing to be quantized and obtain high-precision pwm signal.Specifically, has adopted based on the computing of floating number to guarantee the internal arithmetic precision the utility model inside, obtain high-precision PWM benchmark pwm value m after the calculating, m is a floating number herein, integral part employing pulse-length modulation for m is the PWM modulation, is PFM (Pulse Frequency Modination) modulation and partly adopted pulse frequency modulation for remainder.This round and PWM (pulse-length modulation)+method of PFM (pulse frequency modulation) has effectively improved the resolution of PWM real output signal, thus reach High Accuracy Control to the power loop.
Three, the utility model system control flow, as Fig. 3:
As follows as system's control flow of finishing among the soft nuclear of the control of the Nios among Fig. 2 S1:
Step ST1 real time execution in embedded real-time multi-task operating system detects host computer and sends communication data, after obtaining upper communication data packets, carry out judging by step ST2, confirm to obtain obtaining packet ST3 after the new communication data packets of host computer, in step ST4 and ST9, judge that according to the specific bit in the new communication data packets of host computer host computer is will read the parameter among the S2 or will write new argument in S2 then;
If read parameter operation, then judge according to ST5 in the process flow diagram～ST8 steps in sequence whether the address legal, if the legal correlation parameter that then from S2, reads, and according to the certain communication stipulations with the parameter establishment communication data packets of reading and send to host computer; If the write parameters operation then judges according to ST10 in the process flow diagram～ST13 steps in sequence whether the address is legal, then in S2, write correlation parameter as if legal, and after finishing write parameters, create the affirmation packet and send to host computer according to the certain communication stipulations;
In the above flow process, if judge in any invalidly in step ST9, ST5 and three steps of ST10, then program all changes ST14～ST15 step branch over to, promptly creates invalid communication data packets and return being uploaded to host computer.
Be software control circulation from step ST1 to ST16 among Fig. 3, this circulates in real time execution in the embedded OS, detects the operation of upper machine communication action triggers by ST1.Guaranteed real-time no gap regulating and controlling like this, promptly guaranteed effective work of the real-time continuous of high accuracy number Switching Power Supply digital regulated controller.
Four, the hardware configuration of the utility model most preferred embodiment:
A kind of high precision digital power supply control regulating, its kernel programmable digital signal processor spare B2 on-site programmable gate array FPGA adopts CYCLONE II series EP2C70 device and feedback signal sampler to adopt high-precision ADC, model: ADS8382, and high-precision low-power consumption ADC, model: ADS1251; Its main peripheral components: external memory storage adopts 32M DDR SDRAM external memory storage, model: MT46V16M16TG; The Flash storer that is used for storage of subscriber data adopts 16M FLASH storer, model: AM29LV128MH; Ethernet controller adopts model to be: the device of LAN91C111; The RS232 serial communication controller adopts model to be: the device of MAX3237; The series arrangement device adopts model to be: the device of EPCS64SI16N; Wherein programmable digital signal processor spare B2 is connected by its internal regulation Control Software and external feedback signal switching device formation closed loop, 32M DDR SDRAM external memory storage, 16M FLASH storer, LAN91C111 ethernet controller, RS232 serial communication controller are connected with the corresponding I pin of programmable digital signal processor spare B2, these connections have comprised address wire, data line and control line, and control its work by the soft nuclear control unit module S1 in the programmable digital signal processor spare B2; Described series arrangement device is connected with the special pin of programmable digital signal processor spare B2, finishes the initialization to programmable digital signal processor spare B2 when powering in system automatically.
Claims (2)
1, a kind of high precision digital power supply control regulating, its main hardware comprises programmable digital signal processor spare (B2) and feedback signal switching device, described programmable digital signal processor spare (B2) forms closed loop by internal software and feedback signal switching device and is connected, it is characterized in that: embed soft nuclear control unit module (S1) in the described programmable digital signal processor spare (B2) and regulate software module (S2) with high precision closed loop, both connect by data bus in the sheet, and described high precision closed loop is regulated software module (S2) by the given module of numeral (U1), main PID or PI computing regulator (U2), auxiliary PID computing regulator (U3), High-Accuracy PWM signal generator (U4), primary feedback digital signal filter device (U5) and auxiliary feedback digital signal wave filter (U6) are formed; Its annexation is as follows:
The given module of numeral (U1) is according to the given signal r of high resolving power that presets in host computer (B1) the control output chip, compare back generated error signal e1 with the primary feedback signal f1 of primary feedback digital signal filter device (U5) real-time continuous output, and send into main PID or PI computing regulator (U2);
After the error signal e 1 main PID of process or inner PID of PI computing regulator (U2) or the PI digital operation, the auxiliary feedback signal f2 of its output valve and the output of auxiliary feedback digital signal wave filter (U6) real-time continuous compares and obtains error signal e 2, and sends into auxiliary PID computing regulator (U3);
Error signal e 2 is exported index of modulation m after assisting the inner pid number computing of PID computing regulator (U3), then pass through High-Accuracy PWM signal generator (U4) and generate needed pwm signal.
2, high precision digital power supply control regulating according to claim 1, it is characterized in that: described high precision digital power supply control regulating can connect external memory storage, the Flash storer that is used for storage of subscriber data, ethernet controller, serial communication controller, series arrangement device etc., cooperate upper system software can realize the networking control of power-supply system easily, external memory storage wherein, the Flash storer that is used for storage of subscriber data, ethernet controller, serial communication controller is connected with the corresponding I pin of programmable digital signal processor spare (B2) respectively, these connections have comprised address wire, data line and control line, and control its work by the soft nuclear control unit module (S1) in the programmable digital signal processor spare (B2); Described series arrangement device is connected with the special pin of programmable digital signal processor spare (B2), finishes the initialization to programmable digital signal processor spare (B2) when powering in system automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202225762U CN201302679Y (en) | 2008-11-25 | 2008-11-25 | High-precision digital power supply control adjuster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202225762U CN201302679Y (en) | 2008-11-25 | 2008-11-25 | High-precision digital power supply control adjuster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201302679Y true CN201302679Y (en) | 2009-09-02 |
Family
ID=41086307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202225762U Expired - Lifetime CN201302679Y (en) | 2008-11-25 | 2008-11-25 | High-precision digital power supply control adjuster |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201302679Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832824A (en) * | 2012-08-07 | 2012-12-19 | 北京金自天正智能控制股份有限公司 | Medium-small power high-precision high-frequency sine wave alternating current power supply |
| CN110442177A (en) * | 2019-08-12 | 2019-11-12 | 中国科学技术大学 | A kind of power control system |
-
2008
- 2008-11-25 CN CNU2008202225762U patent/CN201302679Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832824A (en) * | 2012-08-07 | 2012-12-19 | 北京金自天正智能控制股份有限公司 | Medium-small power high-precision high-frequency sine wave alternating current power supply |
| CN102832824B (en) * | 2012-08-07 | 2014-11-19 | 北京金自天正智能控制股份有限公司 | Medium-small power high-precision high-frequency sine wave alternating current power supply |
| CN110442177A (en) * | 2019-08-12 | 2019-11-12 | 中国科学技术大学 | A kind of power control system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101414194A (en) | High precision digital power supply control regulating apparatus | |
| CN103744467B (en) | For solar cell maximum power tracing device and the control method thereof of miniature satellite power system | |
| Wang et al. | Storage-less and converter-less photovoltaic energy harvesting with maximum power point tracking for internet of things | |
| CN201371945Y (en) | Electric steering engine controller based on FPGA | |
| Capizzi et al. | Recurrent neural network-based control strategy for battery energy storage in generation systems with intermittent renewable energy sources | |
| CN107147124B (en) | A kind of method of UPFC access system, five node power injection model of UPFC and tidal current computing method | |
| CN201302679Y (en) | High-precision digital power supply control adjuster | |
| CN104734504B (en) | DC-DC converter control method and system | |
| CN116301275B (en) | Energy consumption adjusting method and device, electronic equipment and medium | |
| CN102830629B (en) | Testing device and method of power electronic control system | |
| CN102156407A (en) | Predictive control method and device for ARM (advanced RISC machines)-based embedded type model | |
| CN103616629B (en) | Full-automatic diode volt-ampere characteristic testing device | |
| CN117878958A (en) | Night reactive compensation analysis method and system for water-light complementary photovoltaic power station | |
| CN106681424B (en) | A kind of solar energy power generating MPPT control systems and control method | |
| CN104407547A (en) | General waveform reproduction control method and device | |
| CN103678078A (en) | Debug system and method | |
| CN101493698B (en) | Frequency signal generating method and circuit based on CAN bus | |
| CN206673862U (en) | A kind of SCM Based step motor control system | |
| CN111711228A (en) | Enhanced hydropower station AGC automatic power generation control method | |
| CN103676893A (en) | Testing machine measurement and control system | |
| Adouairi et al. | Implementation of variable-step P&O MPPT control for PV systems based on dSPACE: processor-in-the-loop test | |
| Lv et al. | Design and Realization of Test System for Digital Input and Output Module | |
| Mostefai et al. | Optimization of photovoltaic installation based on machine learning for water pumping system using a BLDC motor | |
| CN114006421B (en) | Rapid reactive power control method and system for wind turbine group | |
| Zhang et al. | Electromechanical transient model verification of photovoltaic power generation unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090902 |
|
| CX01 | Expiry of patent term |