CN101414194A - High precision digital power supply control regulating apparatus - Google Patents
High precision digital power supply control regulating apparatus Download PDFInfo
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- CN101414194A CN101414194A CNA2008102323859A CN200810232385A CN101414194A CN 101414194 A CN101414194 A CN 101414194A CN A2008102323859 A CNA2008102323859 A CN A2008102323859A CN 200810232385 A CN200810232385 A CN 200810232385A CN 101414194 A CN101414194 A CN 101414194A
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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention discloses a high-precision digital power supply control regulator. The regulator mainly comprises a programmable digital signal processing device and a feedback signal conversion device; the digital signal processing device is embedded with a soft core control unit module and a high-precision closed-loop regulation software module which are connected by an on-chip data bus; the high-precision closed-loop regulation software module consists of a digital given module, a main PID (or PI) computation regulator, an auxiliary PID computation regulator, a high-precision PWM signal generator, a main digital feedback signal filter, an auxiliary digital feedback signal filter and the like. The high-precision digital power supply control regulator controls and regulates various functional modules in the high-precision closed-loop regulation software module by a control program of the embedded soft core control unit module so as to achieve high-precision control of output signals. The high-precision digital power supply control regulator can completely replace the existing high-precision simulation regulator products at home and abroad, and the overall performance of the high-precision digital power supply control regulator is better than the simulation products with a view to economic cost, reconfigurability and control precision.
Description
Technical field
The present invention 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.
Summary of the invention
Be limitation and the deficiency that overcomes prior art, the invention 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.
Beneficial effect of the present invention
1, the present invention compares 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 invention 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 SKM75GB123D1200V/75AIGBT.Design specified being output as ± 20V/10A.Current feedback adopts LEM current sensor LA25-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 IG BT2 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 present invention of above test, its regulative mode is more flexible than the simulation controlled adjuster.Obviously, the present invention 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 a programmable digital signal processor spare A2 regulating and controlling schematic diagram of the present invention;
Fig. 3 is a system controlling software process flow diagram of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
One, the selection of the main components and parts of the present invention:
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 core devices FPGA of the present invention, 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 present invention 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 among the present invention 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 inside of the present invention, 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, system of the present invention 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 most preferred embodiment of the present invention:
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.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN103208924A (en) * | 2013-04-18 | 2013-07-17 | 东软飞利浦医疗设备系统有限责任公司 | Kilovolt (KV) control method and system adopting digital technique |
| TWI414134B (en) * | 2010-08-13 | 2013-11-01 | Qisda Corp | Control circuit and method for determining supply mode of power, and power supply circuit |
| CN103777657A (en) * | 2012-10-24 | 2014-05-07 | 联创汽车电子有限公司 | Oxygen sensor heating control method |
| CN107229270A (en) * | 2017-06-02 | 2017-10-03 | 中国航发南方工业有限公司 | Power control box Auto-Test System |
| CN107272660A (en) * | 2017-07-26 | 2017-10-20 | 江南大学 | A kind of random fault detection method of the network control system with packet loss |
| CN107342675A (en) * | 2017-06-26 | 2017-11-10 | 北京无线电测量研究所 | A kind of digital power control, apparatus and system |
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| CN112947621A (en) * | 2020-09-30 | 2021-06-11 | 北京空间机电研究所 | High-precision temperature measurement and control method based on double feedback |
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| 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 |
| CN103777657A (en) * | 2012-10-24 | 2014-05-07 | 联创汽车电子有限公司 | Oxygen sensor heating control method |
| CN103777657B (en) * | 2012-10-24 | 2016-08-17 | 联创汽车电子有限公司 | Oxygen sensor method for heating and controlling |
| CN103208924A (en) * | 2013-04-18 | 2013-07-17 | 东软飞利浦医疗设备系统有限责任公司 | Kilovolt (KV) control method and system adopting digital technique |
| CN107229270A (en) * | 2017-06-02 | 2017-10-03 | 中国航发南方工业有限公司 | Power control box Auto-Test System |
| CN107342675A (en) * | 2017-06-26 | 2017-11-10 | 北京无线电测量研究所 | A kind of digital power control, apparatus and system |
| CN107272660A (en) * | 2017-07-26 | 2017-10-20 | 江南大学 | A kind of random fault detection method of the network control system with packet loss |
| CN107272660B (en) * | 2017-07-26 | 2019-05-17 | 江南大学 | A kind of random fault detection method of the network control system with packet loss |
| CN110234196A (en) * | 2019-06-04 | 2019-09-13 | 中国科学院近代物理研究所 | A kind of digital low system for synchrotron |
| CN110234196B (en) * | 2019-06-04 | 2021-11-30 | 中国科学院近代物理研究所 | Digital low-level system for synchrotron |
| CN110442177A (en) * | 2019-08-12 | 2019-11-12 | 中国科学技术大学 | A kind of power control system |
| CN110442177B (en) * | 2019-08-12 | 2020-12-25 | 中国科学技术大学 | Power supply control system |
| CN111521863A (en) * | 2020-04-07 | 2020-08-11 | 上海帆声图像科技有限公司 | Signal output and detection precision optimizing system |
| CN112947621A (en) * | 2020-09-30 | 2021-06-11 | 北京空间机电研究所 | High-precision temperature measurement and control method based on double feedback |
| CN112462914A (en) * | 2020-12-10 | 2021-03-09 | 天津理工大学 | Integrated power supply structure |
| CN112462914B (en) * | 2020-12-10 | 2023-09-12 | 天津理工大学 | Integrated power supply structure |
| CN113311900A (en) * | 2021-04-21 | 2021-08-27 | 聚融医疗科技(杭州)有限公司 | High-precision positive-negative symmetrical power supply system and working method thereof |
| CN114488925A (en) * | 2021-12-29 | 2022-05-13 | 天水电气传动研究所集团有限公司 | Testing device for PLC (programmable logic controller) function in particle accelerator power supply |
| CN116545226A (en) * | 2023-07-06 | 2023-08-04 | 西安矽源半导体有限公司 | Resonance conversion circuit based on FPGA and method thereof |
| CN116545226B (en) * | 2023-07-06 | 2023-09-15 | 西安矽源半导体有限公司 | Resonance conversion circuit based on FPGA and method thereof |
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