CN101327033A - High-voltage pulse generator based on ARM embedded system - Google Patents
High-voltage pulse generator based on ARM embedded system Download PDFInfo
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- CN101327033A CN101327033A CNA2008100624387A CN200810062438A CN101327033A CN 101327033 A CN101327033 A CN 101327033A CN A2008100624387 A CNA2008100624387 A CN A2008100624387A CN 200810062438 A CN200810062438 A CN 200810062438A CN 101327033 A CN101327033 A CN 101327033A
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Abstract
The invention discloses a high voltage impulse generator based on an ARM embedded system. A microprocessor is respectively connected with an LCD display circuit, a keyboard, a sensor, a memory and an IGBT driving circuit, an IGBT full bridge inverter circuit is respectively connected with a power circuit, another IGBT full bridge inverter circuit and a high frequency booster circuit, and the high frequency booster circuit outputs high frequency impulse signals. 220V alternating current is changed into direct current after full bridge rectification through a diode and LC filtering. The direct current flows in from the collecting electrodes of two IGBT tubes, is inverted into a bipolar square-wave impulse with adjustable impulse width, impulse quantity and voltage strength through a high frequency IGBT bridge-type inverter circuit, and is finally output after being boosted through a high frequency booster transformer. Through the embedded ARM processor, the quantity of peripheral control circuits can be greatly reduced, and the control precision can be enhanced. By utilizing the invention, foods in a liquid processing room can be sterilized.
Description
Technical field
The present invention relates to a kind of based on ARM embedded system high-voltage pulse generator.
Background technology
High-pressure pulse electric (PEF) sterilization technology is one of the focus in current food sterilizing field.The high-pressure pulse electric treatment system mainly is made up of five parts, high-voltage pulse generator, food treatment chamber, cooling system, monitoring system, exhaust and induction system.Food liquid is transported to by conveyance conduit after exhaust as electrolyte and carries out high-voltage pulse in the food liquid process chamber and handle.Sparking electrode is arranged in the process chamber, electrode two termination high-voltage pulse generators, during high-voltage pulse generator output high-voltage pulse, the sparking electrode discharge has formed high-pressure pulse electric in process chamber, and this electric field can effectively kill the germ in the food liquid.Cooling system is by the temperature of method cooling processing chamber such as water-cooled, air cooling and inner processed food thereof, the temperature rise of the processed food of strict control in sterilization.In whole food processing procedure, monitoring system is monitored the temperature of inner treatment chamber in real time by a series of sensors, pulse voltage intensity, the flow velocity of liquid material etc., the user can see the data that monitoring system provides on host computer, if abnormal conditions are arranged, can on corresponding link, adjust, guarantee normally carrying out of entire process process.
Just begin to explore the PEF sterilization as far back as Hamilton in 1967 and Sale.After this Chinese scholars has obtained the theoretical foundation of a series of preciousnesses to the sterilization mechanism of PEF, to the form influence of microorganism, the quality influence of food and each aspects such as factor of influencing the PEF sterilization effect have been done number of research projects.The researcher has carried out the PEF processing to food liquids such as milk, cider, peach juice, orange juice, orange juice, pineapple juice, egg white solutions, studied the influence of PEF, obtained the optimum deal with data and the conclusion of a lot of sterilizations germ sterilization effects such as Gram-negative bacteria, gram-positive bacteria, Escherichia coli, saccharomycete, lactic acid bacteria, moulds.Theoretical and result of experiment shows that it is fully feasible utilizing the sterilization of PEF technology, and sterilization effect is remarkable, has the promotional value of very strong application.Compare with traditional pasteurization, high-voltage pulse electric field sterilization with its efficiently, in short-term, non-heat, low power consuming, free of contamination advantage becomes a research focus of international food industry.The U.S., Japan and other countries have dropped into lot of manpower and material resources it have been studied, and have obtained good achievement.But at home, the research about the PEF sterilization still is in the starting stage.
Though the PEF sterilization technology has a high potential in the food sterilizing field, still have many technical problems to need to solve, wherein the high-voltage pulse generator as the whole system core is the maximum bottleneck that present PEF sterilization technology is realized industrial applications.Therefore, design a kind of stable, reliably, high-voltage pulse generator with optimization process effect seems still for important.The pulse with best sterilization effect of generally acknowledging in the world is the ambipolar square-wave pulse of high frequency at present.The width of discovering square-wave pulse is more little, and the temperature rise of sterilization back food liquid is more little; The voltage strength degree of pulse is big more, and sterilization effect is good more, but can cause corresponding temperature rise.Therefore choose suitable processing parameter and can obtain optimum sterilization effect, the standard that can reach sterilization can make the temperature rise minimum of food again.The IGBT device with its switching speed height, voltage-type drive, driving power is little, saturation pressure reduces and can be high voltage withstanding and advantage such as big electric current, has become current at the most widely used power semiconductor device of industrial circle.Its hard switching frequency reaches 25KHz, and soft switching frequency can reach 100KHz.And thunderbolt type (Thunderbolt) the type IGBT that newly is developed into, its hard switching frequency can reach 150KHz, can reach 300KHz in the resonance inversion soft switch circuit.Choose suitable IGBT device, then can produce the high-frequency impulse that satisfies the high-voltage pulse electric field sterilization demand fully with the IGBT full bridge inverter.
The pulsewidth of high-voltage pulse also is the key parameter of PEF sterilization.Along with the continuous development of pulsewidth modulation (PWM) technology, embedded system, the PWM control technology has obtained unprecedented development.People begin to break away from classical PWM analog control circuit, begin one's study with embedded system control PWM.Embedded technology is the electronic technology of day by day popularizing in recent years, and its small product size is little, low in energy consumption, disposal ability is strong, is bringing into play more and more important effect at industrial control field.Wherein, arm processor adopts risc architecture, aboundresources, fast operation, the operating system of portable real-time multi-task, and the performance height, low in energy consumption, cost is low.Utilize the timer 0,1 that embeds examination chip (S3C44B0X), the bipolarity PWM generator that can directly form is accurately controlled the pulse width that high-voltage pulse produces.
Summary of the invention
The objective of the invention is to for high-pressure pulse electric (PEF) sterilization provides a kind of high-voltage pulse generator based on the ARM embedded system, but utilize the food liquid in this high-voltage pulse generator liquid towards process chamber to carry out sterilization treatment.
For achieving the above object, the technical solution used in the present invention is:
Comprise power circuit, IGBT full bridge inverter, high frequency booster circuit, IGBT drive circuit, microprocessor, LCD display circuit, keyboard, sensor and memory; Microprocessor is connected with LCD display circuit, keyboard, sensor, memory and IGBT drive circuit respectively, the IGBT full bridge inverter is connected with power circuit, IGBT full bridge inverter and high frequency booster circuit respectively, high frequency booster circuit output high-frequency pulse signal.
Described power circuit is made up of full-bridge diode rectifier circuit and LC filter circuit; Described IGBT full bridge inverter is made up of four high-power IGBTs of V1～V4; the colelctor electrode of each high-power IGBT connects the power supply that power circuit provides; grounded emitter; grid connects the IGBT drive circuit; meet gate protection resistance R 1～R4 between grid and the emitter stage; connect discharge prevention type buffer circuit between colelctor electrode and the emitter stage, play the overvoltage protection effect, the bipolar pulse after the inversion is exported after the high frequency booster circuit boosts.
Described IGBT drive circuit adopts the HCPL-316JIGBT gate-drive photo-coupler module of four road Agilent companies to drive four IGBT respectively, the grid voltage amplitude limiter circuit is connected on the end of drive circuit, directly be connected between the grid and emitter stage of IGBT, be stabilized in ± 20V to guarantee the voltage between grid and the emitter stage.
Described microprocessor is selected the 32-bit microprocessor S3C44B0X based on the ARM framework of SAMSUNG company for use, with method control two-way pwm pulse signal, LCD demonstration, the keyboard of C Programming with Pascal Language;
The bipolarity PWM generator that the PWM timer 0,1 of S3C44B0X chip is formed, the pwm control signal that generator sends links to each other with No. four drive circuits of IGBT, PWM timer 0 connects brachium pontis IGBT pipe V1, V3, PWM timer 1 meets down brachium pontis IGBT pipe V2, V4, LCD adopts the LM057QCIT01 Liquid Crystal Module, this module be connected with S3C44B0X finish after, add the deflection voltage of 27V at 6 pin of Liquid Crystal Module.
The beneficial effect that the present invention has is:
The HCPL-316J IGBT gate-drive photo-coupler that adopts Agilent company to produce among the present invention; its characteristic is: the CMOS/TTL compatibility; the 500nS switching speed; soft IGBT turn-offs; integrated overcurrent; under-voltage protection, this module can drive IGBT and be up to the 150A/1200V level, makes the pulse width of the bipolar square wave pulse that high-voltage pulse generator sends shorter.Select the arm processor S3C44B0X of SAMSUNG company for use, can significantly reduce the design of peripheral circuit.PWM control can be on the ARM embedded development platform, and utilization C Programming with Pascal Language realizes.Therefore can save pwm pulse generation circuit such as pulse modulated circuit, greatly simplify the pulse production process.The embedded system of S3C44B0X is powerful, can make full use of its resource and realize soft keyboard.Compare with contact-making switch, the action of soft keyboard is quicker, and the CPU that needs still less.This multitask real-time system of operating system portable μ C/OS-II of this embedded system can be write c program by this platform PWM, LCD demonstration, keyboard and memory and sensor are controlled.
Description of drawings
Fig. 1 is a hardware system structure block diagram of the present invention.
Fig. 2 is that high-voltage pulse of the present invention produces circuit structure diagram.
Fig. 3 is the connection layout of two-way PWM output signal of the present invention and four road IGBT drive circuits.
Fig. 4 is the lcd controller connection layout of Liquid Crystal Module LM057QCIT01 of the present invention and S3C44B0X.
The specific embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is a hardware system structure block diagram of the present invention.The hardware of whole system comprises power circuit, IGBT full bridge inverter, high frequency booster circuit, IGBT drive circuit, microprocessor, LCD display circuit, keyboard, sensor and memory.Embedded control system of the present invention is used μ C/OS-II multiple task real-time operation system.It is free, a disclosed real-time embedded kernel of source code, and is portable good.On this operating platform, by using C language compilation program, the LCD that the system that can realize is right shows, PWM controls, the keyboard operation data are stored and the control of sensor data acquisition.With the bipolarity PWM generator that the PWM timer 0,1 of S3C44B0X chip is formed, the pwm control signal that generator sends links to each other with No. four drive circuits 5 of IGBT.PWM timer 0 connects brachium pontis IGBT pipe V1, V3, and PWM timer 1 meets down brachium pontis IGBT pipe V2, V4.S3C44B0X has 8 memory banks, and each memory bank can reach 32MB, can reach 256MB altogether; In 8 memory banks, Bank0～Bank 5 support ROM SRAM; Bank6/Bank7 supports ROM, SRAM and SDRAM etc., satisfies the data storage fully.
Fig. 2 is that high-voltage pulse produces circuit structure diagram.Wherein 1 is power circuit, and 2 is full-bridge IGBT inverter circuit, and 3 are discharge prevention type buffer circuit, 4 high frequency booster circuits.Power circuit 1 becomes direct current with the 220V alternating current after diode full-bridge rectification and LC filtering.Direct current act as square-wave pulse through full-bridge IGBT inverter circuit 2.This square-wave pulse can be input on two electrodes of food liquid process chamber after boosting through high frequency booster circuit 4, is used for the sterilization of food liquid.High-voltage pulse is directly produced by IGBT, therefore, the IGBT full bridge inverter whether stablize the quality quality that is directly connected to high-voltage pulse.Resistance R 1～R4 is respectively the gate protection resistance of 4 IGBT, prevents to cause IGBT to damage because of grid return disconnects.Owing to have distributed inductance in the circuit, and the speed of cut-offfing of IGBT is exceedingly fast, and therefore reaches with it when IGBT turn-offs and during the reverse recovery diodes backward recovery that connects, will produce very big surge voltage Ldi/dt, damages IGBT possibly and manages.So will connect discharge prevention type buffer circuit 3 between the grid of IGBT pipe and emitting stage, the loss of discharge prevention type buffer circuit is little, is suitable for the IGBT HF switch, is used for the overvoltage protection of IGBT.
Fig. 3 a and Fig. 3 b are the connection layout of two-way PWM output signal and four road IGBT drive circuits.The grid of 4 IGBT is connected with No. four drive circuits 5 respectively, and the core of drive circuit adopts the HCLP-316J driver module.Because grid and the voltage between the emitter stage of IGBT must be stabilized in ± 20V, if exceed this voltage, therefore the safety that can threaten the IGBT pipe will add the grid voltage amplitude limiter circuit of being made up of two voltage-stabiliser tube Z1, Z2 6 at the end of drive circuit.The HCPL-316JIGBT gate-drive photo-coupler that the drive circuit of IGBT adopts Agilent company to produce, its characteristic is: CMOS/TTL compatibility, 500nS switching speed; soft IGBT turn-offs; integrated overcurrent, under-voltage protection, this module can drive IGBT and be up to the 150A/1200V level.The VIN+ on the HCPL-316J left side, FAULT links to each other with the S3C44B0X chip respectively with RESET.Wherein brachium pontis IGBT V1, V3 link to each other with PWM output signal 0 on the two-way, and following brachium pontis IGBT V2, V4 link to each other with PWM output signal 1, and output signal 0 and 1 refers to the PWM timer 0 and 1 on the S3C44B0X chip respectively.Among the figure power supply+5V be+15V ,-5V provides operating voltage for HCPL-316J.No. 5 pin/RESET of 4 road HCPL-316J link to each other with the I/O mouth of microcomputer S3C44B0X respectively with No. 6 pin/FAULT.No. 14 pin DESAT of HCPL-316J are the over-current signal input, and during when the IGBT conducting and above reference voltage 7V, the FAULT signal can be by high step-down in 5uS.No. 6 pin/FAULT are low level, and therefore all outputs of device automatic blocking can protect the IGBT module, send an alarm signal to microprocessor S3C44B0X simultaneously.
Fig. 4 is the lcd controller connection layout of LM057QCIT01 and S3C44B0X.S3C44B0X and LM057QCIT01 have very strong versatility, therefore their ease of connection realizes, but the demonstration of LM057QCIT01 needs the 27V deflection voltage, provides voltage so need install the circuit that can realize the voltage deflection additional between the interface of the lcd controller LM057QCIT01 of S3C44B0X.Lcd controller has 20 pins, and LM057QCIT01 has 15 pins.When connecting, the pin 13～17 of lcd controller is unsettled.The 27V deflection voltage that is provided by external circuit is provided No. 6 pin VSS of LM057QCIT01.
The course of work of the present invention is as follows:
The 220V alternating current becomes direct current after diode full-bridge rectification and LC filtering.This direct current is by V1, and the colelctor electrode of two IGBT pipes of V3 flows into, and is all adjustable bipolar square wave pulse of pulse width, pulse number and voltage strength through 2 inversions of high-frequency I GBT bridge inverter main circuit, output after square-wave pulse is boosted by high-frequency step-up transformer 4.This pulse is added on the two end electrodes of food treatment chamber, produces high-pressure pulse electric in process chamber, is used for the sterilization of food.Four road HCPL-316J drive circuits 5 connect the grid of 4 IGBT respectively, also are provided with grid voltage amplitude limiter circuit 6 in drive circuit, are stabilized in ± 20V to guarantee the voltage between grid and the emitter stage.LCD and keyboard have been formed friendly man-machine interface.LCD is in order to show the parameter of high-voltage pulse, and the user then can revise the basic parameter of high-voltage pulse by keyboard.On the basis based on the embedded development platform of ARM and μ C/OS-II, LCD shows, PWM control and keyboard operation can realize by simple C Programming with Pascal Language.This system can link to each other with PC by the RS-232 serial communication of S3C44B0X, a series of I/O by S3C44B0X can also control multiple sensors, according to the various parameters in user's the needs collection high-voltage pulse electric field sterilization process, as the flow velocity of cooling medium in the temperature of process chamber, the flow velocity, cooling system of electric-field intensity, food liquid in the process chamber or the like, thereby make whole high-voltage pulse disinfection system more perfect.
Claims (4)
1, a kind of high-voltage pulse generator based on the ARM embedded system is characterized in that comprising power circuit, IGBT full bridge inverter, high frequency booster circuit, IGBT drive circuit, microprocessor, LCD display circuit, keyboard, sensor and memory; Microprocessor is connected with LCD display circuit, keyboard, sensor, memory and IGBT drive circuit respectively, the IGBT full bridge inverter is connected with power circuit, IGBT full bridge inverter and high frequency booster circuit respectively, high frequency booster circuit output high-frequency pulse signal.
2, a kind of high-voltage pulse generator according to claim 1 based on the ARM embedded system, it is characterized in that: described power circuit is made up of full-bridge diode rectifier circuit and LC filter circuit; Described IGBT full bridge inverter is made up of four high-power IGBTs of V1～V4; the colelctor electrode of each high-power IGBT connects the power supply that power circuit provides; grounded emitter; grid connects the IGBT drive circuit; meet gate protection resistance R 1～R4 between grid and the emitter stage; connect discharge prevention type buffer circuit between colelctor electrode and the emitter stage, play the overvoltage protection effect, the bipolar pulse after the inversion is exported after the high frequency booster circuit boosts.
3, a kind of high-voltage pulse generator according to claim 1 based on the ARM embedded system, it is characterized in that: described IGBT drive circuit adopts the HCPL-316JIGBT gate-drive photo-coupler module of four road Agilent companies to drive four IGBT respectively, the grid voltage amplitude limiter circuit is connected on the end of drive circuit, directly be connected between the grid and emitter stage of IGBT, be stabilized in ± 20V to guarantee the voltage between grid and the emitter stage.
4, a kind of high-voltage pulse generator based on the ARM embedded system according to claim 1 is characterized in that:
(1) described microprocessor is selected the 32-bit microprocessor S3C44B0X based on the ARM framework of SAMSUNG company for use, with method control two-way pwm pulse signal, LCD demonstration, the keyboard of C Programming with Pascal Language;
(2) the bipolarity PWM generator of PWM timer 0,1 composition of S3C44B0X chip, the pwm control signal that generator sends links to each other with No. four drive circuits of IGBT, PWM timer 0 connects brachium pontis IGBT pipe V1, V3, PWM timer 1 meets down brachium pontis IGBT pipe V2, V4, LCD adopts the LM057QCIT01 Liquid Crystal Module, this module be connected with S3C44B0X finish after, add the deflection voltage of 27V at 6 pin of Liquid Crystal Module.
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| CNA2008100624387A CN101327033A (en) | 2008-06-10 | 2008-06-10 | High-voltage pulse generator based on ARM embedded system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862881A (en) * | 2010-06-11 | 2010-10-20 | 广东火电工程总公司 | Gas-protective submerged-arc welding digitalized power supply system for dual ARM (Automated Route Management) control and control method thereof |
| CN102055362A (en) * | 2009-11-04 | 2011-05-11 | 清华大学深圳研究生院 | High-voltage pulse power supply for processing food with pulse electric field |
| CN102237805A (en) * | 2010-04-22 | 2011-11-09 | 上海碧埃荻电子科技有限公司 | Portable medical high-frequency high-voltage generator of X-ray machine |
| CN102738772A (en) * | 2012-06-05 | 2012-10-17 | 常熟开关制造有限公司(原常熟开关厂） | Protection control method of transformer power module with short-circuit protection unit |
| CN106390284A (en) * | 2016-09-26 | 2017-02-15 | 陈国莲 | Gout therapeutic device |
| CN107359781A (en) * | 2017-07-30 | 2017-11-17 | 扬州大学 | A kind of low-power electric pulse generator and its impulse modulation and control method |
| CN110176855A (en) * | 2019-05-31 | 2019-08-27 | 芜湖康爱而电气有限公司 | A kind of active clamp protection circuit of the IGBT driving based on HCPL-316J |
-
2008
- 2008-06-10 CN CNA2008100624387A patent/CN101327033A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055362A (en) * | 2009-11-04 | 2011-05-11 | 清华大学深圳研究生院 | High-voltage pulse power supply for processing food with pulse electric field |
| CN102237805A (en) * | 2010-04-22 | 2011-11-09 | 上海碧埃荻电子科技有限公司 | Portable medical high-frequency high-voltage generator of X-ray machine |
| CN101862881A (en) * | 2010-06-11 | 2010-10-20 | 广东火电工程总公司 | Gas-protective submerged-arc welding digitalized power supply system for dual ARM (Automated Route Management) control and control method thereof |
| CN101862881B (en) * | 2010-06-11 | 2013-03-27 | 广东火电工程总公司 | Gas-protective submerged-arc welding digitalized power supply system for dual ARM (Automated Route Management) control and control method thereof |
| CN102738772A (en) * | 2012-06-05 | 2012-10-17 | 常熟开关制造有限公司(原常熟开关厂） | Protection control method of transformer power module with short-circuit protection unit |
| CN102738772B (en) * | 2012-06-05 | 2014-11-05 | 常熟开关制造有限公司(原常熟开关厂） | Protection control method of transformer power module with short-circuit protection unit |
| CN106390284A (en) * | 2016-09-26 | 2017-02-15 | 陈国莲 | Gout therapeutic device |
| CN107359781A (en) * | 2017-07-30 | 2017-11-17 | 扬州大学 | A kind of low-power electric pulse generator and its impulse modulation and control method |
| CN110176855A (en) * | 2019-05-31 | 2019-08-27 | 芜湖康爱而电气有限公司 | A kind of active clamp protection circuit of the IGBT driving based on HCPL-316J |
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Open date: 20081224 |