CN101631404A - Magnetocaloric driver system and control method thereof - Google Patents
Magnetocaloric driver system and control method thereof Download PDFInfo
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- CN101631404A CN101631404A CN200910109467A CN200910109467A CN101631404A CN 101631404 A CN101631404 A CN 101631404A CN 200910109467 A CN200910109467 A CN 200910109467A CN 200910109467 A CN200910109467 A CN 200910109467A CN 101631404 A CN101631404 A CN 101631404A
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Abstract
The invention relates to a magnetocaloric driver system comprising an embedded computer control subsystem and an induction heating driving subsystem. The embedded computer control subsystem integrates a microcomputer control technology, an information technology and a digital signal processing technology in a processing board to finish signal processing, send out a precise control signal and control the work of the induction heating driving subsystem; the induction heating driving subsystem converts power-frequency alternating current into high-frequency alternating current by power; and a magnetocaloric driver is externally connected with an induction coil to generate an alternating magnetic field around the coil and heat metal in the magnetic field by an eddy current effect generated by the magnetic field. The invention also discloses a control method of the system. The system and the method can independently design an electromagnetic induction circuit to realize the standard production and recognize parameters of an external coil so as to satisfy the universality requirements of equipment, realize intelligent control and accordingly facilitate the industrial integrated control.
Description
Technical field
The invention belongs to industrial heating field, more particularly, relate to magnetocaloric driver system and control method thereof.
Background technology
Traditional industry adds the mode that thermal recovery uses some energy such as coal, fuel oil etc., pollutes, produces greenhouse effect easily and be unfavorable for sustainable development based on the industrial mode of heating of this class energy.
Along with science and technology development, the method that electromagnetic induction heating occurred, its basic principle is that the industrial-frequency alternating current that will import becomes high-frequency current through power converter, drive external induction coil, around coil, produce alternating magnetic field, near metal object is heated by the eddy current effect that magnetic field produces.A kind ofly like this by modern micro-control technology electric energy is carried out effective Technics of Power Electronic Conversion, to produce electromagnetic induction heating be purpose to drive loading coil, and blanket equipment, is called magnetocaloric driver.But the problem that has following aspect at present based on the firing equipment of inductive heating principle:
1, heater circuit is one with induction coil and is connected firmly, and heater circuit does not have independently to be configured to the common apparatus of a standard, therefore can't realize standardized production;
2, do not realize the Based Intelligent Control function of magnetocaloric driver, be not easy to carry out industrial integrated control;
3, external coil parameter can not be discerned, thereby the versatility requirement of external equipment can not be satisfied.
Therefore, need a kind ofly can make heater circuit and induction coil separate independent design, can realize intellectuality control that magnetic heat drives and the scheme that can discern external coil, overcome the above-mentioned defective that exists in the prior art.
Summary of the invention
Technical problem to be solved by this invention is, at existing inductive heating circuit and induction coil can not independent design, do not realize the intellectuality control of magnetocaloric driver and can not discern the defective of external coil parameter, a kind of magnetocaloric driver system and control method thereof are provided.
The present invention solves the scheme that its technical problem adopts: magnetocaloric driver is divided into the embeddeding computer control subsystem and induction heating driving subsystem is formed.The embeddeding computer control subsystem is integrated in the data value of microcomputerized control technology, information technology, Digital Signal Processing and predetermined external connection type and the control model of connection type correspondence in the disposable plates, finish signal processing, coupling different external connection connection type, send control signal, whole system is carried out intellectuality control.
The invention provides magnetocaloric driver system, comprising:
Embeddeding computer control subsystem: be used for the input power supply is detected, receive user's control commands, acquired signal, finish signal processing, send control signal, the control whole system operation;
Induction heating driving subsystem: be used for 50Hz three-phase main-frequency alternating current is converted to the alternating current of two-phase 20kHz to 100kHz, receive the control signal that the embeddeding computer control subsystem is sent, metal object is heated by external induction coil.
Induction heating driving subsystem comprises:
Rectification circuit unit: be used for converting 50Hz three-phase main-frequency alternating current to direct voltage, and the direct voltage after will changing is sent into the inverter circuit unit;
Inverter circuit unit: be used for converting the direct current that rectification electric furnace unit is sent into the alternating current of the 20kHz to 100kHz of two-phase to, and output in the external induction coil.
The embeddeding computer control subsystem comprises:
User communication unit: be used for user's input of control commands, and control command is sent into signal processing unit, or be used for the result of output signal processing unit;
Signal gathering unit: be used to gather inversion unit feedback signal, and the signal that collects sent into signal processing unit;
Signal processing unit: thus be used for to the input power supply detect the control command of operating state, the process user input of control protection electric circuit unit, acquired signal that signal gathering unit is sent into carries out analyzing and processing, send control signal and signal sent into the inverter circuit unit according to the data value of the predetermined connection type of cell stores and the control model of connection type correspondence;
Protective circuit unit: be used for according to the testing result of signal processing unit to circuit, whether the decision induction heating driving subsystem can enter operating state, if the result of electric circuit inspection does not meet the requirement of work, it then is guard mode, system is protected and does not carry out work, if the result of electric circuit inspection meets the requirement of work, then is non-guard mode, system is a normal operating conditions;
Memory cell: the data value and the connection type control corresponding pattern that are used for storing predetermined connection type.
When system powers on, at first signal processing unit will detect the input power supply, judges promptly also whether input supply voltage, frequency, phase place be correct, if the input power supply satisfies system requirements, signal processing unit resets to whole system so, and the system that also is about to is set to initial condition; If the input power supply has abnormal conditions, as brownout, system can not carry out operate as normal so, and the protective circuit unit gets up system protection, also promptly is in the state of cisco unity malfunction.
The connection type of cell stores is the material type of the metal of output circuit connection, and general material type has silver, copper, iron and aluminium etc.The principal element that influences the metallic object heats in the induction heating has system frequency, also is the output frequency of inverter circuit unit, the relative permeability of different metals, the resistance coefficient of different metals etc.Resistance coefficient is the key that influences output current, and the maximum power that can export of final decision driver.
Classify by the metal material, method by experiment obtains the time current curve data of different materials metal: y
i=F (x
i), x wherein
iRepresent time point, y
iRepresent time point x
iThe time current value, can calculate the system's output frequency that is fit to this kind material metal and power etc. according to the resistance coefficient of current value and material etc.The time current curve data of different materials is stored in memory cell as the connection type data value, and parameters such as system's output frequency of different materials metal, power, system mode are stored in memory cell as the control model of connection type correspondence.
Memory cell is managed maintenance concentratedly to the data value of the predetermined connection type of storage and the control model of connection type correspondence, and can the continuous updating upgrading.
A kind of control method of magnetocaloric driver comprises the steps:
S1) system powers on;
S2) detect the input power supply;
S3) according to testing result to the input power supply, judge whether to carry out system reset to initial condition, if can carry out system reset, then forward S4 to;
S4) whole system is resetted;
S5) user's input of control commands;
S6) feedback signal that feedback is come is gathered in input test pulse simultaneously;
S7) judge according to the feedback signal of gathering whether the connection of output circuit is effective, if effectively, then forward S8 to;
S8) according to fitting algorithm the feedback signal of gathering is calculated, mated all predetermined connection types, obtain current output and belong to which kind of connection type, and according to current connection type decision control model;
S9) enter the control corresponding pattern.
In step S3, if cannot carry out system reset according to the testing result of importing power supply is judged as, a then nearly step comprises the steps:
S31) system is cut into guard mode;
S32) can not feed back to the user by repositioning information.
In step S7, if described output circuit connection invalid, then invalid information is fed back to the user.
Described fitting algorithm in the step 8 is:
The connection type of the coupling cell stores in the step 8 is: utilize formula
Calculate the sum of square of deviations of each the connection type data value in image data and the memory cell, get the connection type of hour correspondence of R value.
In step 9, system enters into according to step S8 and obtains the pairing control model of connection type.
Utilize system and method disclosed by the invention, thereby thereby thereby make the electromagnetic induction circuit can independent design realize standardized production, versatility requirement that the parameter that can discern external coil satisfies equipment, can realize that Based Intelligent Control is easy to carry out industrial integrated control.
Description of drawings
Fig. 1 is the magnetocaloric driver system structural representation that a preferred embodiment of the present invention provides;
Fig. 2 is the control principle schematic diagram of the magnetocaloric driver system that provides of a preferred embodiment of the present invention;
Fig. 3 is the flow chart of the magnetocaloric driver control method that provides of a preferred embodiment of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Fig. 1 is the magnetocaloric driver system structural representation that a preferred embodiment of the present invention provides.As shown in Figure 1, comprise embeddeding computer control subsystem 1 and induction heating driving subsystem 2.
Fig. 2 is the control principle schematic diagram of the magnetocaloric driver system that provides of a preferred embodiment of the present invention.As shown in Figure 2, induction heating driving subsystem 2 comprises rectification circuit unit 21 and inverter circuit unit 22.Rectification circuit unit 21 is used for converting 50Hz three-phase main-frequency alternating current to direct voltage, and the direct voltage after will changing is sent into inversion electric furnace unit 22; Inverter circuit unit 22 is used for the direct current that the rectification circuit unit is sent into is converted to the alternating current of the 20kHz to 100kHz of two-phase, and outputs to (not shown) in the induction coil of wanting external.Embeddeding computer control subsystem 1 comprises signal gathering unit 11, signal processing unit 12, memory cell 13, protective circuit unit 14 and user communication unit 15.Signal gathering unit 11 be used to gather inverter circuit unit 22 feedback signal, and the signal that collects sent into signal processing unit 12; User communication unit 15 is used for user's input of control commands, and control command is sent into signal processing unit 12, or is used for the result of output signal processing unit 12; Thereby signal processing unit 12 be used for to the input power supply detect the control command of operating state, process user communication unit 15 inputs of control protection electric circuit circuit unit 14, acquired signal that signal gathering unit 11 is sent into carries out analyzing and processing, send control signal and signal sent into inverter circuit unit 22 according to the data value of the predetermined connection type of memory cell 13 storages and the control model of connection type correspondence; Protective circuit unit 14 is used for the testing result according to 12 pairs of inputs of signal processing unit power supply; whether the decision entire circuit can enter operating state; if the result who detects does not meet the requirement of work; it then is guard mode; system is protected and does not carry out work; if the result who detects meets the requirement of work, then is non-guard mode, system carries out normal operating conditions.Memory cell 13 is used for the data value of storing predetermined connection type and the control model of connection type correspondence.
When system powers on, at first signal processing unit will detect the input power supply, judges promptly also whether input supply voltage, frequency, phase place be correct, if the input power supply satisfies system requirements, signal processing unit resets to whole system so, and the system that also is about to is set to initial condition; If the input power supply has abnormal conditions, as brownout, system can not carry out operate as normal so, and the protective circuit unit gets up system protection, also promptly is in the state of cisco unity malfunction.
The connection type of cell stores is the material type of the metal of output circuit connection, and general material type has silver, copper, iron and aluminium etc.The principal element that influences the metallic object heats in the induction heating has system frequency, also is the output frequency of inverter circuit unit, the relative permeability of different metals, the resistance coefficient of different metals etc.Resistance coefficient is the key that influences output current, and the maximum power that can export of final decision driver.
Classify by the metal material, method by experiment obtains the time current curve data of different materials metal: y
i=F (x
i), x wherein
iRepresent time point, y
iRepresent time point x
iThe time current value, can calculate the system's output frequency that is fit to this kind material metal and power etc. according to the resistance coefficient of current value and material etc.The time current curve data of different materials is stored in memory cell as the connection type data value, and parameters such as system's output frequency of different materials metal, power, system mode are stored in memory cell as the control model of connection type correspondence.
Memory cell is managed maintenance concentratedly to the data value of the predetermined connection type of storage and the control model of connection type correspondence, and can the continuous updating upgrading.
Fig. 3 is the flow chart of the magnetocaloric driver control method that provides of a preferred embodiment of the present invention.As shown in Figure 3, comprise the steps:
S1) system powers on;
S2) signal processing unit detects the input power supply;
S3) signal processing unit judges whether to carry out system reset to initial condition, if can carry out system reset, then forwards S4 to, if can not carry out system reset, then forwards S5 to;
S4) signal processing unit resets to whole system, then execution in step S7;
S5) the protective circuit unit is cut into guard mode with system, then execution in step S6;
S6) can not feed back to the user by the user communication unit by repositioning information;
S7) user's input of control commands;
S8) to the input test pulse of inverter circuit unit, the synchronous signal collecting unit is gathered the feedback signal that inverter circuit unit feedback is come;
S9) signal processing unit judges according to the feedback signal of gathering whether the connection of output circuit is effective, if effectively, then forward S10 to, if invalid, then forwards S11 to;
S10) signal processing unit calculates the feedback signal of gathering according to fitting algorithm, and the connection type of coupling cell stores obtains current output and belongs to which kind of connection type, and according to connection type decision control model, execution in step S12 then;
S11) signal processing unit is sent invalid information into the user communication unit and is fed back to the user;
S12) system enters corresponding control model.
Described fitting algorithm among the step S10 is:
The connection type of the coupling cell stores among the step S10 further comprises: utilize formula
Calculate the sum of square of deviations of each the connection type data in image data and the memory cell, get the connection type of hour correspondence of R value.
In step S12, system enters into according to step S10 and obtains the pairing control model of connection type.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1, a kind of magnetocaloric driver system is characterized in that, comprising:
Embeddeding computer control subsystem: be used for the input power supply is detected, receive user's control commands, acquired signal, finish signal processing, send control signal, the control whole system operation;
Induction heating driving subsystem: be used for 50Hz three-phase main-frequency alternating current is converted to the alternating current of two-phase 20kHz to 100kHz, receive the control signal that the embeddeding computer control subsystem is sent, metal object is heated by external induction coil.
2, system according to claim 1 is characterized in that described induction heating driving subsystem comprises:
Rectification circuit unit: be used for converting 50Hz three-phase main-frequency alternating current to direct voltage, and the direct voltage after will changing is sent into the inverter circuit unit;
Inverter circuit unit: be used for the direct current that the rectification circuit unit is sent into is converted to the alternating current of the 20kHz to 100kHz of two-phase, and output in the external induction coil.
3, as system as described in the claim 2, it is characterized in that described embeddeding computer control subsystem comprises:
User communication unit: be used for user's input of control commands, and control command is sent into signal processing unit, or be used for the result of output signal processing unit;
Signal gathering unit: be used to gather the inverter circuit unit feedback signal, and the signal that collects sent into signal processing unit;
Signal processing unit: thus be used for to the input power supply detect the control command of operating state, the process user input of control protection electric circuit unit, acquired signal that signal gathering unit is sent into carries out analyzing and processing, send control signal and signal sent into the inverter circuit unit according to the data value of the predetermined connection type of cell stores and the control model of connection type correspondence;
Protective circuit unit: be used for according to the testing result of signal processing unit to circuit, whether the decision induction heating driving subsystem can enter operating state, if the result of electric circuit inspection does not meet the requirement of work, it then is guard mode, system is protected and does not carry out work, if the result of electric circuit inspection meets the requirement of work, then is non-guard mode, system is a normal operating conditions;
Memory cell: the data value and the connection type control corresponding pattern that are used for storing predetermined connection type.
4, a kind of control method of magnetocaloric driver is characterized in that, comprises the steps:
S1) system powers on;
S2) detect the input power supply;
S3) according to testing result to the input power supply, judge whether to carry out system reset to initial condition, if can carry out system reset, then forward S4 to;
S4) whole system is resetted;
S5) user's input of control commands;
S6) feedback signal that feedback is come is gathered in input test pulse simultaneously;
S7) judge according to the feedback signal of gathering whether the connection of output circuit is effective, if effectively, then forward S8 to;
S8) according to fitting algorithm the feedback signal of gathering is calculated, mated all predetermined connection types, obtain current output and belong to which kind of connection type, and according to current connection type decision control model;
S9) enter the control corresponding pattern.
As method as described in the claim 4, it is characterized in that 5, in step S 3, cannot carry out system reset if described basis is judged as the testing result of input power supply, a then nearly step comprises the steps:
S31) system is cut into guard mode;
S32) can not feed back to the user by repositioning information.
As method as described in the claim 4, it is characterized in that 6, a nearly step of step S7 comprises: if described output circuit connection invalid, then invalid information is fed back to the user.
7, as method as described in the claim 4, it is characterized in that the described fitting algorithm among the step S8 is:
X wherein
iBe acquisition time point, y
iBe acquisition time point x
iThe current value that collects constantly, F (x
i) be that the connection type be scheduled to is at x
iCurrent value constantly, R is the match radius, its meaning is the sum of square of deviations of data point.
As method as described in the claim 7, it is characterized in that 8, all predetermined connection types of coupling described in the step S8 further comprise: utilize formula
Calculate the sum of square of deviations of image data and predetermined each connection type data, get the connection type of hour correspondence of R value.
9, as method as described in the claim 8, it is characterized in that step S9 further comprises: system enters into according to step S8 and obtains the pairing control model of connection type.
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| CN2009101094679A CN101631404B (en) | 2009-08-19 | 2009-08-19 | Magnetocaloric driver system and control method thereof |
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| CN2009101094679A CN101631404B (en) | 2009-08-19 | 2009-08-19 | Magnetocaloric driver system and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107995712A (en) * | 2017-12-08 | 2018-05-04 | 北京弗圣威尔科技有限公司 | Wireless power heating unit and heating means and placement thing and its preparation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3886342A (en) * | 1973-04-26 | 1975-05-27 | Environment One Corp | Induction cooking unit having all pan safe operation, wide range power control and low start-up and shut-down transients |
| JPS598148B2 (en) * | 1977-07-27 | 1984-02-23 | 松下電器産業株式会社 | frequency converter |
| CN2251856Y (en) * | 1995-11-23 | 1997-04-09 | 韦小贵 | Small-sized large power switch inverter medium, high frequency magnetic induction heating apparatus |
| CN2299149Y (en) * | 1997-04-28 | 1998-12-02 | 尹洪生 | Electrical heating appts. for extracting petroleum from deep well |
| CN2702528Y (en) * | 2003-12-23 | 2005-05-25 | 湘潭电机股份有限公司 | Superaudio welding power source |
| CN2684510Y (en) * | 2004-01-12 | 2005-03-09 | 顺德东泽智能电器有限公司 | Easy control electromagnetic oven |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107995712A (en) * | 2017-12-08 | 2018-05-04 | 北京弗圣威尔科技有限公司 | Wireless power heating unit and heating means and placement thing and its preparation method |
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Assignee: SHENZHEN UHY ENERGY TECHNOLOGIES CO., LTD. Assignor: Ruan Haishen Contract record no.: 2012440020051 Denomination of invention: Magnetocaloric driver system and control method thereof Granted publication date: 20111123 License type: Exclusive License Open date: 20100120 Record date: 20120412 |
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Effective date of registration: 20120509 Address after: 518051, Guangdong, Shenzhen, Nanshan District province Nantou fun Foreign Trade Industrial Zone B5 Building 5 floor Patentee after: SHENZHEN UHY ENERGY TECHNOLOGIES CO., LTD. Address before: 518000 B2012, Residence Internazionale, Nanshan District, Guangdong, Shenzhen Patentee before: Ruan Haishen |