CN112019197A - Pulse current generator and control method - Google Patents
Pulse current generator and control method Download PDFInfo
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- CN112019197A CN112019197A CN202010842841.2A CN202010842841A CN112019197A CN 112019197 A CN112019197 A CN 112019197A CN 202010842841 A CN202010842841 A CN 202010842841A CN 112019197 A CN112019197 A CN 112019197A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/04—Modifications for accelerating switching
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B1/00—Production of fats or fatty oils from raw materials
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
Abstract
The embodiment of the invention discloses a pulse current generator and a control method. A pulsed current generator comprising: a direct current power supply, a relay and a controller; the controller is electrically connected with the relay and used for controlling the on-off of the relay based on preset pulse parameters; the relay is connected in series in a loop of the direct current power supply for supplying power to the load so as to generate pulse current to drive the load. The controller controls the on-off of the relay connected in series to the loop based on the preset pulse parameters, so that the rectangular pulse current with the preset width and the larger amplitude is generated in the loop, the problems of larger switching loss, serious heating, poor stability, low switching speed and the like in the conventional pulse power supply are solved, the effects of short switching response time and smaller heating are achieved while the rectangular pulse current with the preset width, the larger amplitude and the preset period is generated, and the effects of being applied to processing methods of cell breaking, grease extraction and the like of biological materials are improved.
Description
Technical Field
The embodiment of the invention relates to the technology of a biological oil extraction device, in particular to a pulse current generator and a control method.
Background
The pulse technology is widely applied to the fields of radar, security inspection, medical treatment, accelerators, industrial irradiation, nondestructive inspection, microwave weapons and the like. In recent years, pulse technology has been increasingly applied to the field of biotechnology such as medicine and food, and technologies such as cell breaking and oil extraction of biological materials by pulse technology have been developed.
The traditional pulse power supply is divided into a mechanical switch type, a high-voltage solid-state switch type and a Marx generator according to an implementation method, and along with the development of semiconductor switch devices, the pulse power supply can adopt an electronic vacuum tube as a switch and is matched with a high-stability filament power supply circuit; and high voltage pulsed electric fields are often used for grease extraction.
The traditional pulse power switch has the problems of large loss, serious heating and need of an additional cooling device; the service life of the vacuum tube discharge switch is limited to a certain extent, and the vacuum tube discharge switch can be normally used only if the vacuum tube discharge switch needs to be replaced after working for a period of time; the range of pulse current generated by the existing pulse power supply is small, the power is low, the pulse frequency is high, great cooling burden is brought, and meanwhile, the generated pulse amplitude is fixed, so that the requirements of cell breaking and grease extraction technologies of biological materials in the technical field of food on the pulse power supply cannot be met.
Disclosure of Invention
The invention provides a pulse current generator and a control method thereof, which are used for generating rectangular pulse current with preset width, larger amplitude and preset period and achieving the effects of short switching response time and smaller heating.
In a first aspect, an embodiment of the present invention provides a pulse current generator, including: a direct current power supply, a relay and a controller;
the controller is electrically connected with the relay and used for controlling the on-off of the relay based on preset pulse parameters;
and the relay is connected in series in a loop of the direct-current power supply for supplying power to the load so as to generate pulse current to drive the load.
Optionally, the load comprises a reaction vessel.
Optionally, the dc power supply includes a power supply and an adjustable resistor, two input ends of the adjustable resistor are connected in parallel to two ends of the power supply, and two output ends of the adjustable resistor serve as output ends of the dc power supply.
Optionally, the pulse generator further comprises a control panel, wherein the control panel is connected with the controller and is used for configuring the preset pulse parameters.
Optionally, the adjustable resistor adjusts the voltage range of the output end of the dc power supply to be 1 to 150V.
Optionally, the relay further comprises a protection resistor, and the protection resistor is connected in parallel to two ends of the relay.
In a second aspect, an embodiment of the present invention further provides a method for controlling a pulse current generator, where a controller is electrically connected to a relay, and the relay is connected in series in a loop in which a direct current power supply supplies power to a load; the controller configures preset pulse parameters through a control panel; and controlling the relay to be closed and opened based on preset pulse parameters so as to generate pulse current to drive the load.
Optionally, the load comprises a reaction vessel, and the reaction vessel reacts according to the pulse current.
Optionally, the dc power supply includes a power supply and an adjustable resistor, two input ends of the adjustable resistor are connected in parallel to two ends of the power supply, and the voltage of the output end of the dc power supply is adjusted through the adjustable resistor.
Optionally, the pulse generator further comprises a control panel, the control panel is connected with the controller, and the controller configures the preset pulse parameters through the control panel.
The embodiment of the invention supplies power to a load through a direct current power supply to form a loop, and the controller controls the on and off of a relay connected in series with the loop based on preset pulse parameters, so that rectangular pulse current with preset width and larger amplitude is generated in the loop, the problems of larger loss and serious heating of a high-voltage solid-state switch, poor stability, poor consistency and low switching speed of a vacuum tube switch in the conventional pulse power supply are solved, the problem of equipment cooling caused by the fact that a conventional pulse current generator generates rectangular pulse with higher frequency is solved, the effects of short switching response time, simplicity in manufacture and smaller heating are achieved while the rectangular pulse current with preset width, larger amplitude and preset period is generated, the effects of the rectangular pulse current applied to processing methods of cell breaking, grease extraction and the like of biological materials are improved, and cell breaking, grease extraction and the like can be better realized, Coalescence of oil drops and other technological purposes.
Drawings
Fig. 1 is a schematic structural diagram of a pulse current generator according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a pulse current generator according to a second embodiment of the present invention;
fig. 3 is a flowchart of a control method of a pulse current generator according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
When a pulse electric field is adopted to extract grease from biological raw materials, a high-voltage alternating-current power supply is mostly used for processing, which is not beneficial to the precipitation of the grease and the utilization of subsequent residue protein; the operation difficulty of low-voltage direct-current pulse power supply treatment is small, energy is saved, and meanwhile, the influence of heat generated by treatment on grease and protein is small; therefore, based on the existing problems, the pulse current generator is provided for providing a low-voltage direct current electric field to process biological raw materials for oil extraction, so that the efficiency and the achievement of the oil extraction are improved.
Fig. 1 is a schematic structural diagram of a pulse current generator according to an embodiment of the present invention, and the pulse current generator according to this embodiment is applicable to processing methods such as cell breaking and grease extraction for biological raw material slurry.
As shown in fig. 1, an embodiment of the present invention provides a pulse current generator, including: a direct current power supply U, a relay K and a controller S;
the controller S is electrically connected with the relay K and used for controlling the on-off of the relay K based on preset pulse parameters;
and the relay K is connected in series in a loop of the direct current power supply U for supplying power to the load R so as to generate pulse current to drive the load R.
The direct-current power supply U supplies power to the load R to form a loop, the relay K is connected in series in the loop, and the relay K is closed and opened under the control of the controller S according to preset pulse parameters to generate pulse current; specifically, when the relay K is closed, the load R is connected with the dc power supply U, a current is generated in the loop, when the relay K is disconnected, the load R is disconnected from the loop of the dc power supply U, no current is generated in the loop, the relay K is continuously closed and disconnected under a preset switching time and a preset frequency, a pulse current with a preset waveform is generated in the loop, and the pulse current drives the load R. The preset pulse parameters include the total time of pulse current generation, the switching time (duty ratio) in one pulse period, and the like. In this embodiment, the Controller S is a Programmable Logic Controller (PLC) Controller, and can be used to internally store a program and execute instructions for operations such as Logic operation, sequence control, timing, counting, and arithmetic operation. The on and off time of the relay K is adjusted through the PLC controller so as to adjust the duty ratio of the generated pulse current. The relay is adopted to switch on and off the loop, the response time is short, the influence on the waveform is small, and the waveform of the pulse current is good and is not distorted.
Illustratively, in an actual oil extraction operation, the treatment effect of the biological raw material slurry, i.e., the extraction efficiency of oil, is mainly affected by the electric field intensity of the pulsed electric field. The total time of pulse current generation is set to be 10800s, the closing time and the opening time of the relay K are set to be 1s respectively, and direct current pulse electricity with the frequency of 0.5Hz, the duty ratio of 50 percent and the response time within 10ms can be generated. The pulse current generator in the embodiment of the invention can generate the pulse current with the pulse period of more than 0.1 s.
The embodiment of the invention supplies power to a load through a direct current power supply to form a loop, and the controller controls the on and off of a relay connected in series with the loop based on preset pulse parameters, so that rectangular pulse current with preset width and larger amplitude is generated in the loop, the problems of larger loss and serious heating of a high-voltage solid-state switch, poor stability, poor consistency and low switching speed of a vacuum tube switch in the conventional pulse power supply are solved, the problem of equipment cooling caused by the fact that a conventional pulse current generator generates rectangular pulse with higher frequency is solved, the effects of short switching response time, simplicity in manufacture and smaller heating are achieved while the rectangular pulse current with preset width, larger amplitude and preset period is generated, the effects of the rectangular pulse current applied to processing methods of cell breaking, grease extraction and the like of biological materials are improved, and cell breaking, grease extraction and the like can be better realized, Coalescence of oil drops and other technological purposes.
Example two
Fig. 2 is a schematic structural diagram of a pulse current generator according to a second embodiment of the present invention, and as shown in fig. 2, according to the second embodiment of the present invention, a pulse current generator is provided, and in view of the above-mentioned technical aspects of the second embodiment, the load further includes a reaction container C.
Illustratively, the pulse current generated by the pulse current generator is applied to the reaction vessel C, and the biological raw material slurry in the reaction vessel C is subjected to the pulse current to obtain the treatment solution. The pulse current has two functions, wherein in the pulse current function process, charged particles inside and outside the cell membrane move along with the current direction, and potential difference is generated inside and outside the cell membrane to promote cell rupture and separation of grease; secondly, at the in-process that pulse current stopped, can promote temperature reduction in the reaction vessel C, effectively reduce the negative effects that the heat effect brought, and when pulse current stopped, charged particle such as fat droplet no longer received the electric current effect, began random brownian motion on the contrary, when the circuit switched on again charged particle follow the electric current once more and removes, can show the destructive action of promotion electric current to the cell and the coalescence of fat droplet.
Optionally, the dc power supply includes a power supply U1 and an adjustable resistor R1, two input terminals (a and b) of the adjustable resistor R1 are connected in parallel to two ends of the power supply U1, and two output terminals (c and d) of the adjustable resistor R1 are used as output terminals of the dc power supply U.
In this embodiment, when different biological raw material slurries in the reactor C react or the reaction proceeds to different stages, the amplitudes of the required pulse currents are different, that is, the voltages provided by the dc power supply are different, two input ends (a and b) of the adjustable resistor R1 are connected in parallel to two ends of the power supply U1, two output ends (C and d) of the adjustable resistor R1 are used as output ends of the dc power supply, and the voltage values connected to two ends of the load can be adjusted by adjusting the connection resistance value of the adjustable resistor R1.
Optionally, the pulse generator further comprises a control panel P, and the control panel P is connected with the controller S and is used for configuring the preset pulse parameters.
By inputting preset pulse parameters such as total reaction time, switching time in a pulse period and the like into the control panel P, the controller S controls the switching action of the relay K according to the preset pulse parameters, so that pulse current conforming to the preset pulse parameters is generated. During processing of the biological feedstock slurry, the parameters set by the controller S can be modified by the control panel P to regulate the reaction of the biological feedstock slurry in the reactor.
Optionally, the adjustable resistor R1 adjusts the voltage range of the output end of the dc power supply to be 1 to 150V.
In this embodiment, in order to obtain a treatment fluid of a predetermined mass, the biological feedstock slurry is placed in a reaction vessel and treated under the action of a pulsed current for a predetermined time, the predetermined time being related to the amplitude of the pulsed current, i.e. the treatment fluid of a predetermined mass can be achieved by adjusting the voltage applied to the load and the predetermined pulse parameters. The voltage of the direct current power supply is 150V, and the voltage range of the output end of the direct current power supply can be adjusted to be 1-150V by adjusting the resistance value of the adjustable resistor R1. Further, by adjusting the adjustable resistor R1, a current of 0.01A to 10A can be generated in the loop.
Optionally, the relay further comprises a protection resistor R2, and the protection resistor R2 is connected in parallel to two ends of the relay K. The protective resistor R2 carries out overcurrent protection on the relay K, and the relay K is prevented from being burnt out when the loop current is large.
Preferably, in one embodiment, the voltage at the output end of the dc power supply is adjusted to 30V by the adjustable resistor R1, the pulse parameters are set by the control panel P, specifically, the total response time 10800s, and the closing and opening times of the relay K are set to 0.05s, respectively, so that dc pulse power with a pulse period of 0.1s, a frequency of 10Hz, a duty ratio of 50% and a response time within 10ms can be generated.
The pulse current generator provided by the embodiment is simple to manufacture, small in size and simple and easy in parameter adjustment, and can meet power supply requirements of cell breaking, oil drop coalescence and other processes under different conditions.
EXAMPLE III
Fig. 3 is a flowchart of a control method of a pulse current generator according to a third embodiment of the present invention, which is applicable to a case of processing methods such as cell breaking and grease extraction for biological raw material slurry, and the method can be executed by a pulse current generator, as shown in fig. 3, and specifically includes the following steps:
and step 310, electrically connecting the controller with a relay, wherein the relay is connected in series in a loop of supplying power to a load by a direct current power supply.
The direct current power supply supplies power to the load to form a loop, the relay is connected in the loop in series, and the relay is used for controlling the on and off of the loop to generate pulse current.
And step 320, configuring preset pulse parameters by the controller through the control panel.
The controller connected with the relay is internally provided with preset pulse parameters and used for controlling the opening and closing of the relay so as to generate pulse current which accords with the preset pulse parameters in the loop. Preferably, the controller is connected with the control panel, and parameters such as total reaction time, pulse period and relay switching time are input into the control panel.
And step 330, controlling the relay to be closed and opened based on preset pulse parameters to generate pulse current to drive the load.
The relay is controlled by the controller to be switched on and off according to preset pulse parameters to generate pulse current; specifically, when the relay is closed, the load is connected with the direct current power supply, current is generated in the loop, when the relay is disconnected, the loop of the load and the direct current power supply is disconnected, no current exists in the loop, the relay is continuously closed and disconnected under preset switching time and preset frequency, preset pulse current is generated in the loop, and the pulse current drives the load.
Furthermore, the direct current power supply comprises a power supply and an adjustable resistor, two input ends of the adjustable resistor are connected to two ends of the power supply in parallel, two output ends of the adjustable resistor are used as output ends of the direct current power supply, and the voltage value of two ends of an access load is adjusted by adjusting the access resistance value of the adjustable resistor, so that the amplitude of the generated pulse current is adjusted.
According to the technical scheme, the controller controls the on-off of the relay connected in series in the loop based on the preset pulse parameters, so that the rectangular pulse current which accords with the preset period, the duty ratio and the amplitude is generated in the loop, meanwhile, the pulse parameters of the controller can be configured according to requirements, the pulse current generated in the loop is adjusted, the problems of large switching loss, serious heating, poor stability, low switching speed and the like in the conventional pulse power supply are solved, the effects of short switching response time and small heating are achieved while the rectangular pulse current with the preset width, large amplitude and preset period is generated, the effects applied to processing methods of cell breaking, grease extraction and the like of biological materials are improved, and the process purposes of cell breaking, oil drop coalescence and the like can be better achieved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A pulsed current generator, comprising: a direct current power supply, a relay and a controller;
the controller is electrically connected with the relay and used for controlling the on-off of the relay based on preset pulse parameters;
and the relay is connected in series in a loop of the direct-current power supply for supplying power to a load so as to generate pulse current to drive the load.
2. The pulsed current generator of claim 1, wherein the load comprises a reaction vessel.
3. The pulsed current generator of claim 1, wherein said dc power source comprises a power source and an adjustable resistor, two input terminals of said adjustable resistor being connected in parallel across said power source, two output terminals of said adjustable resistor being output terminals of said dc power source.
4. The pulsed current generator of claim 1, further comprising a control panel connected to said controller for configuring said preset pulse parameters.
5. The pulsed current generator of claim 3, wherein said adjustable resistance adjusts the output voltage of said DC power supply to a range of 1 to 150V.
6. The pulsed current generator of claim 1, further comprising a protection resistor connected in parallel across the relay.
7. A method of controlling a pulsed current generator, comprising:
the controller is electrically connected with the relay, and the relay is connected in series in a loop of supplying power to a load by a direct-current power supply;
the controller configures preset pulse parameters through a control panel;
and controlling the relay to be closed and opened based on the preset pulse parameters so as to generate pulse current to drive the load.
8. The method of controlling a pulsed current generator of claim 7, wherein the load comprises a reaction vessel that reacts according to the pulsed current.
9. The method of claim 7, wherein the dc power supply comprises a power source and an adjustable resistor, two input terminals of the adjustable resistor are connected in parallel to two ends of the power source, and the voltage of the output terminal of the dc power supply is adjusted by the adjustable resistor.
10. The method of claim 7, further comprising a control panel, wherein the control panel is connected to the controller, and the controller configures the preset pulse parameters through the control panel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010842841.2A CN112019197A (en) | 2020-08-20 | 2020-08-20 | Pulse current generator and control method |
| PCT/CN2020/137038 WO2022036967A1 (en) | 2020-08-20 | 2020-12-17 | Pulse current generator and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010842841.2A CN112019197A (en) | 2020-08-20 | 2020-08-20 | Pulse current generator and control method |
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| CN112019197A true CN112019197A (en) | 2020-12-01 |
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| WO (1) | WO2022036967A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022036967A1 (en) * | 2020-08-20 | 2022-02-24 | 中国海洋大学 | Pulse current generator and control method |
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| CN102758214A (en) * | 2011-04-28 | 2012-10-31 | 杨香莲 | Induction type electrolytic tank |
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| CN103952305B (en) * | 2014-04-29 | 2016-01-06 | 扬州大学 | The method of electrocatalysis bacterial biof iotalm is built at microorganism electrochemical reactor anode |
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| CN112019197A (en) * | 2020-08-20 | 2020-12-01 | 中国海洋大学 | Pulse current generator and control method |
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- 2020-08-20 CN CN202010842841.2A patent/CN112019197A/en active Pending
- 2020-12-17 WO PCT/CN2020/137038 patent/WO2022036967A1/en active Application Filing
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| CN101447746A (en) * | 2008-12-22 | 2009-06-03 | 西北工业大学 | Controllable electric discharging modification pulse power source |
| CN202309671U (en) * | 2011-11-11 | 2012-07-04 | 华瑞昇电子（深圳）有限公司 | Single live wire capacitor touch control wall switch |
| CN204304970U (en) * | 2014-12-15 | 2015-04-29 | 重庆七色实业有限公司 | A kind of inductive switch |
| CN208239569U (en) * | 2018-03-30 | 2018-12-14 | 上海陆芯电子科技有限公司 | A kind of dipulse test platform |
| CN111416543A (en) * | 2020-03-13 | 2020-07-14 | 华中科技大学 | Square wave pulse power supply for positioning cable intermediate joint |
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| WO2022036967A1 (en) * | 2020-08-20 | 2022-02-24 | 中国海洋大学 | Pulse current generator and control method |
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