CN103167656B - Commercial induction cooker chip circuit and commercial induction cooker - Google Patents
Commercial induction cooker chip circuit and commercial induction cooker Download PDFInfo
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- CN103167656B CN103167656B CN201310085814.5A CN201310085814A CN103167656B CN 103167656 B CN103167656 B CN 103167656B CN 201310085814 A CN201310085814 A CN 201310085814A CN 103167656 B CN103167656 B CN 103167656B
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Abstract
The present invention discloses a kind of commercial induction cooker chip circuit, comprise processor, IGBT drive circuit, the output of processor connects IGBT drive circuit, also comprise three comparators, AD sampling module, the output detecting the first current detection circuit of commercial induction cooker DC bus connects first comparator and AD sampling module, detect the output flowing through the second current detection circuit of commercial electromagnetic oven coilpanel electric current and connect second, 3rd comparator and AD sampling module, the output of three comparators and the output of AD sampling module are all connected with processor signal, and, first comparator is also connected described IGBT drive circuit with the output of the 3rd comparator, the reference voltage level of second comparator and the reference voltage level of two other comparator are not identical.The present invention replaces existing single-chip microcomputer and peripheral circuit with chip circuit, is integrated on one piece of circuit board, reduces costs, improve electrical system generalization degree.
Description
Technical field
The present invention relates to electromagentic furnace technology field, more particularly, relate to a kind of chip circuit of commercial formula electromagnetic oven and use the electromagnetic oven of this chip circuit.
Background technology
Electromagnetic oven (stove) is according to electromagnetic inductive heating principle, alternating current is utilized to produce alternating magnetic field by coil, alternating magnetic field produces induced current (eddy current) bottom the irony of iron pot, and eddy current makes a pot body generate heat rapidly, thus can realize the function of cooking food.Electromagnetic oven separates family expenses and commercial two kinds, the flames of anger of commercial induction cooker chip circuit, without bright cigarette, without waste gas, sanitation and hygiene, can greatly improve kitchen work environment, along with the development of control technology, commercial use will substitute conventional commercial gas utensil gradually, thus have broad application prospects.Conventional commercial electromagnetic oven power is between 10-60kW, and current commercial induction cooker adopts half-bridge, analog control mostly, and when power is larger, internal current is also higher, and easily occur the phenomenon that Inside coil burns, reliability is not high.For sort this problem out, also have indivedual producer to adopt full-bridge mode at present, internal current is reduced, and the program must adopt two control boards, two power supplys, and product cost is increased.
Existing commercial induction cooker electric control system adopts Single-chip Controlling, the heating of electromagnetic oven is controlled by analog signal, for realizing the computer heating control of electromagnetic oven, more functional circuit is needed in the periphery of single-chip microcomputer, for the commercial induction cooker chip circuit of different model, be difficult to the generalization realizing control system.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of commercial induction cooker chip circuit adopting digital intelligent control mode, to overcome the deficiencies in the prior art.
Another object of the present invention is to provide a kind of commercial induction cooker using said chip circuit.
The technical solution adopted for the present invention to solve the technical problems is: a kind of commercial induction cooker chip circuit, comprise processor, IGBT drive circuit, the output of processor connects IGBT drive circuit, also comprise three comparators, AD sampling module, the output detecting the first current detection circuit of commercial induction cooker DC bus connects first comparator and AD sampling module, detect the output flowing through the second current detection circuit of commercial electromagnetic oven coilpanel electric current and connect second, 3rd comparator and AD sampling module, the output of three comparators and the output of AD sampling module are all connected with processor signal, and, first comparator is also connected described IGBT drive circuit with the output of the 3rd comparator, the reference voltage level of second comparator and the reference voltage level of two other comparator are not identical.
A kind of commercial induction cooker, comprise the input of interconnective three phase mains, three-phase alternating current filter circuit, three phase rectifier filter circuit, IGBT module, also comprise embedded controller, described embedded controller is connected with temperature sensing circuit, current/voltage testing circuit, described IGBT module connects half-bridge current and exports or the output of full-bridge electric current, and described embedded controller comprises commercial induction cooker chip circuit as claimed in claim 1.
Described IGBT module at least comprises two IGBT, the E pole of one of them IGBT is connected with the C pole of another IGBT, the C pole of one of them IGBT connects the rectifier bridge negative pole of the E pole connection three phase rectifier filter circuit of Hall current instrument transformer first polar curve circle CT101, another IGBT of current/voltage testing circuit.
The delivery outlet of embedded controller connects IGBT drive circuit, display circuit and power control switching, described IGBT module also comprises the 3rd IGBT and the 4th IGBT, the E pole of the 3rd IGBT is connected with the C pole of the 4th IGBT, the common port of described 3rd, the 4th IGBT connects full-bridge current output circuit, the C pole of the 3rd IGBT connects the rectifier bridge negative pole of the E pole connection three phase rectifier filter circuit of Hall current instrument transformer first polar curve circle CT101, the 4th IGBT of current/voltage testing circuit.
Described full-bridge electric current exports and comprises serial connecting coils dish L1 and electric capacity C1, and the common port of described 3rd, the 4th IGBT connects electric capacity C1, and described coil panel L1 connects Hall current instrument transformer just polar curve circle CT102.
Described IGBT module connects half-bridge current and exports, described half-bridge current exports and comprises serial connecting coils dish L1, electric capacity C1 and electric capacity C4, the common port connecting coil dish L1 of electric capacity C1 and electric capacity C4, the other end of electric capacity C1 connects the rectifier bridge negative pole of the other end connection three phase rectifier filter circuit of Hall current instrument transformer first polar curve circle CT101, electric capacity C4.
Compared with prior art, the invention has the beneficial effects as follows:
Commercial induction cooker chip circuit of the present invention replaces existing single-chip microcomputer and peripheral circuit, can highly be integrated on one piece of circuit board, and replace existing Analog control with digital control, improve the intelligent level of commercial induction cooker, and reduce the cost of control system, improve electrical system generalization degree.
Accompanying drawing explanation
Fig. 1 is commercial induction cooker chip circuit theory diagram of the present invention.
Fig. 2 is commercial induction cooker chip structure schematic diagram of the present invention.
Fig. 3 is commercial induction cooker electric control system block diagram of the present invention.
Fig. 4 is commercial induction cooker electric control system circuit diagram of the present invention.
Fig. 5 is the driving circuit structure schematic diagram of commercial induction cooker of the present invention first IGBT.
Fig. 6 is the driving circuit structure schematic diagram of commercial induction cooker of the present invention second IGBT.
Fig. 7 is the driving circuit structure schematic diagram of commercial induction cooker of the present invention 3rd IGBT.
Fig. 8 is the driving circuit structure schematic diagram of commercial induction cooker of the present invention 4th IGBT.
Fig. 9 is commercial induction cooker display interface circuit schematic diagram of the present invention.
Figure 10 is commercial electromagnetic oven power control switch interface circuit schematic diagram of the present invention.
Figure 11 is commercial induction cooker induction cooker fan control circuit structural representation of the present invention.
Figure 12 is commercial induction cooker temperature sensing circuit thermometric interface circuit one schematic diagram of the present invention.
Figure 13 is commercial induction cooker temperature sensing circuit thermometric interface circuit two schematic diagram of the present invention.
Figure 14 is commercial induction cooker temperature sensing circuit thermometric interface circuit three schematic diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
See Fig. 1, 2, 4, the present invention relates to a kind of commercial induction cooker chip circuit, comprise three comparator CP1, CP2, CP3, the positive pole of comparator connects electric current input, the negative pole of comparator connects reference voltage VREF1 respectively, VREF2, VREF3, also comprise AD sampling module 21, the equal connection handling device 20 of output of three comparators and AD sampling module 21, the output of processor 20 connects IGBT drive circuit 22, and respectively from four pin (EPWM1A of chip, EPWM1B, EPWM2A, EPWM2B) draw, connect each IGBT(in different electromagnetic oven electric control systems for half-bridge circuit, then only have two IGBT and corresponding configuration two drive circuits), respectively drived control is carried out to intrasystem IGBT.Processor can control the waveform of IGBT drive circuit, thus realizes IGBT controlling functions.The output of comparator CP1, CP3 is also directly connected with IGBT drive circuit 22, thus protects the object of quick overcurrent protection.
First current detection circuit 61 is for detecting the electric current on DC bus, and the second current detection circuit 62 is for detecting the alternating current of flowing through coil dish.Enter processor 20 after the current value signals of first, second current detection circuit carries out AD conversion by AD sampling module 21 respectively, processor process AD value, sends drive singal to IGBT drive circuit 22.The electric current I 1 that first current detection circuit exports enters comparator CP1, the electric current I 2 that second current detection circuit exports enters comparator CP2 and CP3, due to output connection handling device and the IGBT drive circuit simultaneously of comparator CP1, CP3, when I1 or I2 value is larger, comparator IGBT drives, block drive waveforms, make IGBT be in off state.The signal that comparator CP2 exports enters processor 20, the information of the square wave drawn by comparator CP2 or rectangle wave frequency, duty ratio, and is undertaken phase-locked by this information, thus controls IGBT drive circuit.Crucially, reference voltage and other two reference voltages of comparator CP2 are different, and the setting of comparator CP2 is the information such as frequency or duty ratio in order to obtain waveform.
See Fig. 3-14, the electromagnetic oven electrical system architecture applying chip circuit of the present invention is such: comprise the 380V three phase mains input 1 be linked in sequence, three-phase alternating current filter circuit 2, three phase rectifier filter circuit 3, IGBT module 4, the current output circuit 5 etc. of full-bridge or half-bridge, current/voltage testing circuit 6 is connected from another output of three phase rectifier filtering 3, the output of current/voltage testing circuit 6 connects open-phase protection circuit 9, embedded controller 10, temperature sensing circuit 8 also connects the input port of embedded controller 10, the delivery outlet of embedded controller 10 connects display circuit 11, power control switching 12, IGBT drive module 7, IGBT drive module 7 is for driving IGBT module 4.
For high-power electromagnetic oven, electromagnetic oven of the present invention adopts full-bridge current output circuit, and as shown in Figure 4, IGBT module 4 includes four IGBT, connects four IGBT drive circuit respectively.Three-phase current enters three phase rectifier filter circuit after three-phase alternating current filtering, in three phase rectifier filter circuit 3, inductance L 2 connects the positive pole of rectifier bridge BR1, filter capacitor C2 one end is connected with inductance L 2, the other end is connected with the negative pole of rectifier bridge, electric capacity C2 is connected the first polar curve circle of the Hall current instrument transformer CT101 in the first current detection circuit 61 with the common port of inductance L 2, current/voltage testing circuit 6 comprises the first current detection circuit 61, second current detection circuit 62 and voltage detecting circuit 63, the other end of the first polar curve circle of Hall current instrument transformer CT101 connects the C pole of IGBT1, the E pole of IGBT1 is connected with the C pole of IGBT2, the E pole of IGBT2 connects the negative pole of rectifier bridge.
Second current detection circuit 62 includes Hall current instrument transformer CT102, electric capacity C11 and resistance R16, one end of the first polar curve circle of Hall current instrument transformer CT102 connects the common port of IGBT1, the other end is connected with coil panel L1, the secondary coil two ends of Hall current instrument transformer CT102 are connected in parallel to electric capacity C11 and resistance R16, and are connected with a rectification circuit.
IGBT module 4 also comprises IGBT3 and IGBT4, be arranged on the opposite side of coil panel L1, IGBT3 and IGBT4 is connected with respectively and independent connects drive circuit, the common port of IGBT3 and IGBT4 connects full-bridge current output circuit 5, the C pole of IGBT3 connects the C pole of IGBT1, the E pole of IGBT3 is connected with the C pole of IGBT4, and the E pole of IGBT4 connects the negative pole of rectifier bridge.
The C pole of IGBT3 connects and also connects voltage detecting circuit 63, and voltage detecting circuit 63 connects open-phase protection circuit 9.
See Fig. 5-8, the drive circuit of IGBT1 comprises IC1, and input voltage is 3.3V, connects with R56.The drive circuit of IGBT2 comprises IC2, and input voltage is 3.3V, connects with R53.The drive circuit of IGBT3 comprises IC3, and input voltage is 3.3V, connects with R54.The drive circuit of IGBT4 comprises IC4, and input voltage is 3.3V, connects with R55.
Electromagnetic oven display interface circuit schematic diagram see Fig. 9, Fig. 9.The pin of XH-7A socket is drawn respectively a plurality of leads to be connected with the chip pin (being COM1, COM2, STB, RXD, TXD pin respectively) of embedded controller.
Be electromagnetic oven power control switch interface circuit schematic diagram see Figure 10, Figure 10.External analog signal enters from 1 pin of XH-3A socket, after the filter circuit be made up of R45 and C31, entering the chip AD0 pin of embedded controller by connecting wire, inputting information through A/D Sampling Interface to controller, thus control action and the gear control of power switch.
Be induction cooker fan control interface schematic diagram see Figure 11, Figure 11.Embedded controller exports control signal by FAN pin on chip, controls judgement and the connection of triode, thus control the relay of fan electromotor electric and dead electricity, realize the switch control rule of fan electromotor.
See Figure 12-14, in figure, socket CN5, CN6, CN7 are plugged with thermistor respectively, be described as follows for Figure 12: R87 and socket XH-2A forms bleeder circuit, R49 and C112 forms simple filter circuit, the analog information of thermistor, after sampling, filtering, enters the TMAIN101 pin of chip, changes through A/D the temperature signal that backward controller provides electromagnetic oven temperature sampled point.
For small power electromagnetic stove, then adopt half-bridge current output circuit, compared with exporting with full-bridge electric current, both differences are: in the circuit structure of full-bridge type control system, IGBT3 and IGBT4 is replaced by resonant capacitance C1 and C4 respectively, the other end of the link connecting coil dish L1 of IGBT3 and IGBT4, resonant capacitance C1 connects the C pole of IGBT1, and the other end of resonant capacitance C4 connects the negative pole of rectifier bridge.
Export for half-bridge current, it is identical that the circuit structure such as IGBT drive circuit, display interface circuit, power control switching interface circuit, fan control, thermometric interface and the full-bridge electric current of electromagnetic stove control system export, at this, and no longer repeated description.
In commercial induction cooker chip circuit of the present invention and electromagnetic oven; the peripheral circuit height of the single-chip microcomputers such as the over-voltage over-current protection circuit of existing system, rectangle wave generation circuit, power control circuit is integrated in embedded controller; original cumbersome peripheral circuit is replaced with integrated chip circuit; the electrical control of electromagnetic oven is realized with digital control technology; reduce electrical control cost, also reduce the volume of control section.In the present invention, electric current input is after rectifying and wave-filtering and resonance, an exportable more stable electric current is to heating plate (coil panel), for the electromagnetic oven of different heating power, mate by adjustment resonant capacitance, half-bridge, full-bridge program can be write in the chip of embedded controller, therefore, for the product of different model, by outside Selection and call distinct program, make hardware components directly general.Usually, the electromagnetic oven of below 15kW adopts half-bridge mode, and more than 15kW then adopts full-bridge mode.For half-bridge mode, IGBT3 and the IGBT4 of the IGBT module of full-bridge system and drive circuit thereof can be replaced with two resonant capacitances respectively.When adopting half-bridge circuit, only IGBT3 and IGBT4 need be replaced by two resonant capacitances, electric control system highly versatile.
Below openly specific embodiments of the invention are only; do not form limiting the scope of the invention; for general technical staff of the technical field of the invention; do not departing under general idea prerequisite of the present invention; according to technical solution of the present invention do without the need to through the change of creative work and replacement, all should drop within protection scope of the present invention.
Claims (1)
1. a commercial induction cooker, electric control system comprises the input of interconnective three phase mains, three-phase alternating current filter circuit, three phase rectifier filter circuit, IGBT module, also comprise embedded controller, described embedded controller is connected with temperature sensing circuit, current/voltage testing circuit, described IGBT module connects half-bridge current and exports or the output of full-bridge electric current, it is characterized in that: described embedded controller is provided with commercial induction cooker chip circuit, described commercial induction cooker chip circuit comprises processor, IGBT drive circuit, the output of processor connects IGBT drive circuit, also comprise three comparators, AD sampling module, the electric control system of described commercial induction cooker includes the first current detection circuit for detecting commercial induction cooker DC bus, detect the second current detection circuit flowing through commercial electromagnetic oven coilpanel electric current, the output of described first current detection circuit connects first comparator and AD sampling module, the output of the second current detection circuit connects second, 3rd comparator and AD sampling module, the output of three comparators and the output of AD sampling module are all connected with processor signal, and, first comparator is also connected described IGBT drive circuit with the output of the 3rd comparator, the reference voltage level of second comparator and the reference voltage level of two other comparator are not identical,
First current detection circuit is for detecting the electric current on DC bus, second current detection circuit is for detecting the alternating current of flowing through coil dish, processor is entered after the current value signals of first, second current detection circuit carries out AD conversion by AD sampling module respectively, processor process AD value, sends drive singal to IGBT drive circuit; The electric current I 1 that first current detection circuit exports enters first comparator, and the electric current I 2 that the second current detection circuit exports enters second and third comparator, and when I1 or I2 value is larger, comparator IGBT drives, and blocks drive waveforms, makes IGBT be in off state; The signal that second comparator exports enters processor, the information of the square wave drawn by the second comparator or rectangle wave frequency, duty ratio, and is undertaken phase-locked by this information, thus controls IGBT drive circuit;
Second current detection circuit includes Hall current instrument transformer CT102, electric capacity C11 and resistance R16, one end of the first polar curve circle of Hall current instrument transformer CT102 connects the common port of an IGBT, the other end is connected with coil panel L1, the secondary coil two ends of Hall current instrument transformer CT102 are connected in parallel to electric capacity C11 and resistance R16, and are connected with a rectification circuit;
Described IGBT module at least comprises two IGBT, the E pole of one of them IGBT is connected with the C pole of another IGBT, the C pole of one of them IGBT connects the rectifier bridge negative pole of the E pole connection three phase rectifier filter circuit of Hall current instrument transformer first polar curve circle CT101, another IGBT of current/voltage testing circuit;
The delivery outlet of embedded controller connects IGBT drive circuit, display circuit and power control switching, described IGBT module also comprises the 3rd IGBT and the 4th IGBT, the E pole of the 3rd IGBT is connected with the C pole of the 4th IGBT, the common port of described 3rd, the 4th IGBT connects full-bridge current output circuit, the C pole of the 3rd IGBT connects the rectifier bridge negative pole of the E pole connection three phase rectifier filter circuit of Hall current instrument transformer first polar curve circle CT101, the 4th IGBT of current/voltage testing circuit;
Described full-bridge electric current exports and comprises serial connecting coils dish L1 and electric capacity C1, and the common port of described 3rd, the 4th IGBT connects electric capacity C1, and described coil panel L1 connects Hall current instrument transformer just polar curve circle CT102.
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| CN201310085814.5A CN103167656B (en) | 2013-03-18 | 2013-03-18 | Commercial induction cooker chip circuit and commercial induction cooker |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105323887B (en) * | 2015-09-16 | 2017-12-19 | 厦门安东电子有限公司 | A kind of power switch cascade heater circuit and its control method and heater |
| CN107592692B (en) * | 2016-07-08 | 2020-12-25 | 肇庆市天宇进出口贸易有限公司 | Electromagnetic heating control system of electromagnetic oven and control method thereof |
| CN106817791B (en) * | 2017-04-01 | 2023-11-14 | 深圳戴普森新能源技术有限公司 | Drive processing module, power supply circuit and variable frequency microwave oven |
| WO2019006753A1 (en) * | 2017-07-07 | 2019-01-10 | 肇庆市天宇进出口贸易有限公司 | Electromagnetic heating system of electromagnetic oven and control method therefor |
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| CN201418166Y (en) * | 2009-06-08 | 2010-03-03 | 深圳市鑫汇科科技有限公司 | High-power electromagnetic oven circuit based on SoC chip |
| CN202150960U (en) * | 2011-06-09 | 2012-02-22 | 徐州市凯越电子科技有限公司 | Load self-adapting medium-frequency electromagnetic induction heating energy-saving device |
| CN202350128U (en) * | 2011-10-28 | 2012-07-25 | 东莞市永尚节能科技有限公司 | Core of commercial induction cooker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944855B (en) * | 2009-07-07 | 2012-11-28 | 深圳市鑫汇科科技有限公司 | Digital control power supply converter for kitchen range |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201418166Y (en) * | 2009-06-08 | 2010-03-03 | 深圳市鑫汇科科技有限公司 | High-power electromagnetic oven circuit based on SoC chip |
| CN202150960U (en) * | 2011-06-09 | 2012-02-22 | 徐州市凯越电子科技有限公司 | Load self-adapting medium-frequency electromagnetic induction heating energy-saving device |
| CN202350128U (en) * | 2011-10-28 | 2012-07-25 | 东莞市永尚节能科技有限公司 | Core of commercial induction cooker |
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