CN202998532U - Electromagnetic induction heating control circuit based on digital signal processing - Google Patents
Electromagnetic induction heating control circuit based on digital signal processing Download PDFInfo
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- CN202998532U CN202998532U CN 201220369808 CN201220369808U CN202998532U CN 202998532 U CN202998532 U CN 202998532U CN 201220369808 CN201220369808 CN 201220369808 CN 201220369808 U CN201220369808 U CN 201220369808U CN 202998532 U CN202998532 U CN 202998532U
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Abstract
The utility model relates to the induction cooker product technology field, and especially relates to an electromagnetic induction heating control circuit based on digital signal processing. The electromagnetic induction heating control circuit based on digital signal processing comprises a main controller, a rectifier, a chopper based on Buck, an inverter and a load, the output end of the rectifier is connected with the chopper, the output end of the chopper is connected with the inverter, and the output end of the inverter is connected with the load; the main controller is connected with the chopper and the inverter, and the inverter comprises a power MOSFET as a switch device, and a driving and protecting circuit. The electromagnetic induction heating control circuit based on digital signal processing enables the quality, the safety performance, the stability performance and the service life of an induction cooker to be improved effectively, and the cost to be reduced.
Description
Technical field
The utility model relates to the electromagnetic oven product technical field, relates in particular to the electromagnetic induction heating control circuit based on Digital Signal Processing.
Background technology
Electromagnetic oven is the electric cooking apparatus that utilizes electromagnetic inductive heating principle to make, and partly is comprised of high-frequency induction heating coil, High frequency power conversion equipment, controller and ferromagnetic material the bottom of a pan cooker etc.During use, pass into alternating current in heater coil, just produce an alternating magnetic field around coil, the magnetic line of force of alternating magnetic field is most of by metal pan, produces a large amount of eddy current in the bottom of a pan, thereby produces the required heat of culinary art.Electromagnetic oven has that quick heating, the heat efficiency are high, the flames of anger, smoke dust, without pernicious gas, to surrounding environment do not produce thermal radiation, volume is small and exquisite, fail safe good and the advantage such as appearance looks elegant, the overwhelming majority that can complete family cooks task.
In large power power electronic appliance, most important to the control and protection circuit design of device for high-power power electronic.Because the operational environment of electromagnetic oven is comparatively abominable, the quality of control and protection circuit is directly connected to the quality of product, security performance, stability, useful life and cost.
Summary of the invention
The purpose of this utility model is to provide for the deficiencies in the prior art the electromagnetic induction heating control circuit based on Digital Signal Processing, can effectively improve quality, security performance, stability, useful life and the cost of electromagnetic oven.
For achieving the above object, the utility model adopts following technical scheme.
Based on the electromagnetic induction heating control circuit of Digital Signal Processing, it comprises master controller, rectifier, the chopper based on Buck, inverter, load; The output of described rectifier connects chopper, and the output of chopper connects inverter, and the output of inverter connects load, and described master controller connects described chopper and inverter.
Described inverter comprises the power MOSFET as switching device, and driving and protective circuit; Described driving and protective circuit comprise integrated chip IXDD430, XOR gate CD4070, high speed photo coupling 6N137, high speed inverter 74LS06, voltage-stabiliser tube D1, diode VD, resistance R
G, resistance R 1, R2, R3, R4, R5, R6, capacitor C 1, C2, C3, C4; The Vdd end of described IXDD430 is connected connection+18V power supply with En, the Gnd end of IXDD430 connects GND2, is connected with C3 between the En end of IXDD430 and Gnd end, and the Out end of IXDD430 connects R
GAn end, R
GThe other end connect the grid G of power MOSFET and the end of R6, the other end of R6 connects the source S of power MOSFET; The positive pole of C4 connects the source S of power MOSFET, and the negative pole of C4 connects GND2; The negative electrode of D1 connects the source S of power MOSFET, and the positive electrode of D1 connects GND2; One termination of R5+18V power supply, the other end of R5 connects the source S of power MOSFET; The In end of IXDD430 connects the end of R4, and the other end of R4 connects the J end of CD4070, the Vdd end connection+5V power supply of CD4070; The end of the A end of CD4070, the positive pole of C2 and R3 all connects the positive pole of VD, and the negative pole of VD connects the drain D of power MOSFET, and the negative pole of C2 connects GND2, the other end connection+5V power supply of R3; End connection+5V the power supply of R2, the other end of R2 connects the B end of CD4070, the B end of CD4070 connects the Out end of 6N137, the VSS end of CD4070 connects GND2, the VCC end of 6N137 and En end company+5V power supply, the Anode end of 6N137 connects the 1Y end of 74LS06, and the Cathode end of 6N137 connects GND1, and the Gnd end of 6N137 connects GND2; The VCC end connection+5V power supply of 74LS06 and the end of C1, the other end of C1 connects GND1, and the Gnd end of 74LS06 connects GND1, and the 1Y end of 74LS06 connects the end of R1, and the other end of R1 connects the VCC end of 74LS06; The 1A termination of 74LS06 receives the control signal of autonomous controller.
Described D1 is the voltage-stabiliser tube of 5.1V, and VD selects high pressure Ultrafast recovery type diode MUR1680A, R
GResistance value be 10 Ω, the resistance value of R1 is 510 Ω, the resistance value of R2 is 300 Ω, and the resistance value of R3 is 1K Ω, and the resistance value of R4 is 1K Ω, the resistance value of R5 is 1K Ω, the resistance value of R6 is 10K Ω, and the capacitance of C1 is 0.1 μ F, and the capacitance of C2 is 47 μ F, the capacitance of C3 is 0.3 μ F, and the capacitance of C4 is 47 μ F.
It comprises that also for the sample circuit that gathers chopper output voltage and inverter output current, described master controller connects described sample circuit.
The utility model beneficial effect is: the electromagnetic induction heating control circuit based on Digital Signal Processing described in the utility model; simplified the design of drive circuit during high speed MOSFET engineering is used; has again complete protection; the reliability of system can be improved, quality, security performance, stability, useful life and the cost of electromagnetic oven can be effectively improved.
Description of drawings
Fig. 1 is schematic block circuit diagram of the present utility model.
Fig. 2 is driving of the present utility model and protective circuit schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As depicted in figs. 1 and 2, electromagnetic induction heating control circuit based on Digital Signal Processing described in the utility model, based on the electromagnetic induction heating control circuit of Digital Signal Processing, it comprises master controller 1, rectifier 3, the chopper 4 based on Buck, inverter 5, load 6; The output of described rectifier 3 connects chopper 4, and the output of chopper 4 connects inverter 5, and the output of inverter 5 connects load 6, and described master controller 1 connects described chopper 4 and inverter 5; It also comprises for the sample circuit 2 that gathers chopper 4 output voltages and inverter 5 output currents, the described master controller 1 described sample circuit 2 of connection.Three-phase alternating current obtains direct voltage by the not empty rectification of rectifier 3 after filtering, by regulating the duty ratio of chopper 4, can regulate the output voltage of chopper 4, and then regulates the input power of inverter 5.Inverter 5 adopts Digital Phase-Locked Loop Technology, reduces switching loss, improves the utilization ratio of power supply.Master controller 1 is TMS320LF2407A, be made as Design of digital inside and outside its abundant sheet hardware resource is provided, wherein the PWM output port of DSP is as the control signal source of power device, and the phase place that capturing unit is caught out output voltage and electric current participates in the digital phase-locked loop computing.The DC side output voltage T1 of sample circuit 2 sampling induction heating powers and output current T2 carry out digital power to be regulated.
Described inverter 5 comprises the power MOSFET as switching device, and driving and protective circuit 51; Described driving and protective circuit 51 comprise integrated chip IXDD430, XOR gate CD4070, high speed photo coupling 6N137, high speed inverter 74LS06, voltage-stabiliser tube D1, diode VD, resistance R
G, resistance R 1, R2, R3, R4, R5, R6, capacitor C 1, C2, C3, C4; The Vdd end of described IXDD430 is connected connection+18V power supply with En, the Gnd end of IXDD430 connects GND2, is connected with C3 between the En end of IXDD430 and Gnd end, and the Out end of IXDD430 connects R
GAn end, R
GThe other end connect the grid G of power MOSFET and the end of R6, the other end of R6 connects the source S of power MOSFET; The positive pole of C4 connects the source S of power MOSFET, and the negative pole of C4 connects GND2; The negative electrode of D1 connects the source S of power MOSFET, and the positive electrode of D1 connects GND2; One termination of R5+18V power supply, the other end of R5 connects the source S of power MOSFET; The In end of IXDD430 connects the end of R4, and the other end of R4 connects the J end of CD4070, the Vdd end connection+5V power supply of CD4070; The end of the A end of CD4070, the positive pole of C2 and R3 all connects the positive pole of VD, and the negative pole of VD connects the drain D of power MOSFET, and the negative pole of C2 connects GND2, the other end connection+5V power supply of R3; End connection+5V the power supply of R2, the other end of R2 connects the B end of CD4070, the B end of CD4070 connects the Out end of 6N137, the VSS end of CD4070 connects GND2, the VCC end of 6N137 and En end company+5V power supply, the Anode end of 6N137 connects the 1Y end of 74LS06, and the Cathode end of 6N137 connects GND1, and the Gnd end of 6N137 connects GND2; The VCC end connection+5V power supply of 74LS06 and the end of C1, the other end of C1 connects GND1, and the Gnd end of 74LS06 connects GND1, and the 1Y end of 74LS06 connects the end of R1, and the other end of R1 connects the VCC end of 74LS06; The 1A termination of 74LS06 receives the control signal of autonomous controller 1.Wherein, described D1 is the voltage-stabiliser tube of 5.1V, and VD selects high pressure Ultrafast recovery type diode MUR1680A, R
GResistance value be 10 Ω, the resistance value of R1 is 510 Ω, the resistance value of R2 is 300 Ω, and the resistance value of R3 is 1K Ω, and the resistance value of R4 is 1K Ω, the resistance value of R5 is 1K Ω, the resistance value of R6 is 10K Ω, and the capacitance of C1 is 0.1 μ F, and the capacitance of C2 is 47 μ F, the capacitance of C3 is 0.3 μ F, and the capacitance of C4 is 47 μ F.
As shown in Figure 2; the integrated chip IXDD430 that above-mentioned driving and protective circuit 51 adopt is the power MOSFET special driving chip that IXYS company produces; actuating speed is fast; the design of simplified driving circuit greatly; its operating current meets power MOSFET to the requirement of drive circuit; and have complete protection fast, can improve the reliability of system, and the size of greatly dwindling control board.In addition, adopt high speed photo coupling 6N137 to carry out electrical isolation, adopt fast diode and XOR gate CD4070 to consist of current foldback circuit, high speed inverter 74LS06 can guarantee the consistency of input/output signal.When input pulse was low level, the C point was high level, and the B point is also high level, added+driving voltage of 13V driving power MOSFET conducting between the grid of power MOSFET and source electrode; When input pulse was high level, the C point was low level, and the B point is also low level, but due to the existence of voltage-stabiliser tube D1, will add-shutoff voltage of 5V switch-off power MOSFET between the grid of power MOSFET and source electrode.R
GSurge when being used for suppressing to drive suppresses false triggering simultaneously.When normal operation, power MOSFET conducting drain power is in low level, A point current potential is back to the D point by diode VD, because drain electrode is in electronegative potential, so the A point also is in low-potential state, and C level point height is identical with input, so the output level of XOR gate height is identical with input, circuit is not exerted an influence.When the power MOSFET overcurrent, drain voltage rises rapidly, VD bears the back-pressure cut-off, by R3, C2 effect, A point current potential begins to raise, until make the XOR gate output low level, make the B point become low level, thereby power MOSFET is born-back-pressure of 5V and reliable turn-off, and be in cut-off state, limited overcurrent.
Electromagnetic induction heating control circuit based on Digital Signal Processing described in the utility model; simplified the design of drive circuit during high speed MOSFET engineering is used; has again complete protection; the reliability of system can be improved, quality, security performance, stability, useful life and the cost of electromagnetic oven can be effectively improved.
The above is only better embodiment of the present utility model, therefore all equivalences of doing according to the described structure of the utility model patent claim, feature and principle change or modify, is included in the utility model patent claim.
Claims (3)
1. based on the electromagnetic induction heating control circuit of Digital Signal Processing, it is characterized in that: it comprises master controller (1), rectifier (3), the chopper (4) based on Buck, inverter (5), load (6); The output of described rectifier (3) connects chopper (4), and the output of chopper (4) connects inverter (5), and the output of inverter (5) connects load (6), and described master controller (1) connects described chopper (4) and inverter (5);
Described inverter (5) comprises the power MOSFET as switching device, and driving and protective circuit (51); Described driving and protective circuit (51) comprise integrated chip IXDD430, XOR gate CD4070, high speed photo coupling 6N137, high speed inverter 74LS06, voltage-stabiliser tube D1, diode VD, resistance R
G, resistance R 1, R2, R3, R4, R5, R6, capacitor C 1, C2, C3, C4; The Vdd end of described IXDD430 is connected connection+18V power supply with En, the Gnd end of IXDD430 connects GND2, is connected with C3 between the En end of IXDD430 and Gnd end, and the Out end of IXDD430 connects R
GAn end, R
GThe other end connect the grid G of power MOSFET and the end of R6, the other end of R6 connects the source S of power MOSFET; The positive pole of C4 connects the source S of power MOSFET, and the negative pole of C4 connects GND2; The negative electrode of D1 connects the source S of power MOSFET, and the positive electrode of D1 connects GND2; One termination of R5+18V power supply, the other end of R5 connects the source S of power MOSFET; The In end of IXDD430 connects the end of R4, and the other end of R4 connects the J end of CD4070, the Vdd end connection+5V power supply of CD4070; The end of the A end of CD4070, the positive pole of C2 and R3 all connects the positive pole of VD, and the negative pole of VD connects the drain D of power MOSFET, and the negative pole of C2 connects GND2, the other end connection+5V power supply of R3; End connection+5V the power supply of R2, the other end of R2 connects the B end of CD4070, the B end of CD4070 connects the Out end of 6N137, the VSS end of CD4070 connects GND2, the VCC end of 6N137 and En end company+5V power supply, the Anode end of 6N137 connects the 1Y end of 74LS06, and the Cathode end of 6N137 connects GND1, and the Gnd end of 6N137 connects GND2; The VCC end connection+5V power supply of 74LS06 and the end of C1, the other end of C1 connects GND1, and the Gnd end of 74LS06 connects GND1, and the 1Y end of 74LS06 connects the end of R1, and the other end of R1 connects the VCC end of 74LS06; The 1A termination of 74LS06 receives the control signal of autonomous controller (1).
2. the electromagnetic induction heating control circuit based on Digital Signal Processing according to claim 1, it is characterized in that: described D1 is the voltage-stabiliser tube of 5.1V, VD selects high pressure Ultrafast recovery type diode MUR1680A, R
GResistance value be 10 Ω, the resistance value of R1 is 510 Ω, the resistance value of R2 is 300 Ω, and the resistance value of R3 is 1K Ω, and the resistance value of R4 is 1K Ω, the resistance value of R5 is 1K Ω, the resistance value of R6 is 10K Ω, and the capacitance of C1 is 0.1 μ F, and the capacitance of C2 is 47 μ F, the capacitance of C3 is 0.3 μ F, and the capacitance of C4 is 47 μ F.
3. the electromagnetic induction heating control circuit based on Digital Signal Processing according to claim 1, it is characterized in that: it comprises that also described master controller (1) connects described sample circuit (2) for the sample circuit (2) that gathers chopper (4) output voltage and inverter (5) output current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220369808 CN202998532U (en) | 2012-07-30 | 2012-07-30 | Electromagnetic induction heating control circuit based on digital signal processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220369808 CN202998532U (en) | 2012-07-30 | 2012-07-30 | Electromagnetic induction heating control circuit based on digital signal processing |
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| Publication Number | Publication Date |
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| CN202998532U true CN202998532U (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220369808 Withdrawn - After Issue CN202998532U (en) | 2012-07-30 | 2012-07-30 | Electromagnetic induction heating control circuit based on digital signal processing |
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| CN (1) | CN202998532U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102802289A (en) * | 2012-07-30 | 2012-11-28 | 东莞市精诚电能设备有限公司 | Electromagnetic induction heating control circuit based on digital signal processing |
| CN104582044A (en) * | 2013-10-18 | 2015-04-29 | 美的集团股份有限公司 | Control circuit and control method for electromagnetic heating device |
| CN112217405A (en) * | 2020-10-29 | 2021-01-12 | 安邦电气股份有限公司 | Three-phase rectification-based voltage transformation heating power supply system |
-
2012
- 2012-07-30 CN CN 201220369808 patent/CN202998532U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102802289A (en) * | 2012-07-30 | 2012-11-28 | 东莞市精诚电能设备有限公司 | Electromagnetic induction heating control circuit based on digital signal processing |
| CN104582044A (en) * | 2013-10-18 | 2015-04-29 | 美的集团股份有限公司 | Control circuit and control method for electromagnetic heating device |
| CN112217405A (en) * | 2020-10-29 | 2021-01-12 | 安邦电气股份有限公司 | Three-phase rectification-based voltage transformation heating power supply system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130612 Effective date of abandoning: 20140709 |
|
| RGAV | Abandon patent right to avoid regrant |