CN203313438U - An induction cooker and a control circuit thereof - Google Patents
An induction cooker and a control circuit thereof Download PDFInfo
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- CN203313438U CN203313438U CN2013202813445U CN201320281344U CN203313438U CN 203313438 U CN203313438 U CN 203313438U CN 2013202813445 U CN2013202813445 U CN 2013202813445U CN 201320281344 U CN201320281344 U CN 201320281344U CN 203313438 U CN203313438 U CN 203313438U
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Abstract
The utility model brings forward a induction cooker and a control circuit thereof. The control circuit comprises a rectification module which transforms an input alternating current into a direct current, a filtering module used for carrying filtering on the direct current, a resonance module, a power switch, a pressure regulating module which carries out adjusting on the voltage of the direct current, and a controller respectively controlling the power switch and the pressure regulating module. The filtering module is connected with the rectification module. The resonance module is connected with the power switch. The pressure regulating module is separately connected with the rectification module and the resonance module. The controller is separately connected with the power switch and the pressure regulating module. The rectification module, the filtering module, the pressure regulating module, and the power switch are all connected with a common ground. According to the control circuit of the induction cooker of the utility model, the input voltage of a resonance circuit can be controlled, so that the voltage of the resonance circuit is more stable. Furthermore, the usage life of the induction cooker can be prolonged. At the same time, the utility model brings forward the induction cooker.
Description
Technical field
The utility model relates to the electromagnetic heating technique field, particularly a kind of control circuit of electromagnetic oven and a kind of electromagnetic oven with this control circuit.
Background technology
At present, the main loop of power circuit voltage of electromagnetic oven is determined by the AC power of input, and only by one group of PWM(Pulse Width Modulate, pulse width modulation) Signal Regulation IGBT(Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) service time duty ratio, thereby obtain different electromagnetic oven powers.The main circuit of existing a kind of typical electromagnetic oven as shown in Figure 1, generally comprises anti-jamming circuit 1, rectification circuit 2, filter circuit 3, LC resonant tank 4, PWM driving IGBT circuit 5.Further circuit diagram as shown in Figure 2, particularly, interchange inputs to anti-jamming circuit and carries out anti-interference process, anti-jamming circuit 1 comprises capacitor C 1, carry out the interchange AC input rectification circuit 2 after anti-interference process, rectification circuit 2 consists of a full-wave rectification bridge, and filter circuit 3 consists of inductance L 3, capacitor C 3, resonant circuit 4 consists of inductance L 4 and capacitor C 4, and pwm control signal drives the service time duty ratio of regulating IGBT5 in IGBT circuit 5 by signal PWM1.Electromagnetic oven circuit as depicted in figs. 1 and 2, its input voltage is in case fixing, and the voltage of process rectification circuit 2, filter circuit 3 outputs is also just fixing, and the output voltage of rectification circuit 2 becomes certain multiple proportions relation with input voltage.Because the voltage of rectification circuit 2 outputs is non-adjustable, in case the overtension of input, the output voltage of rectification circuit 2 also can be very high, filter circuit 3 output voltages are powered to resonant circuit 4, drive LC resonant tank 4 system works, will make LC resonant tank 4 systems bear too high electric stress, particularly to the IGBT device, make the IGBT device be subject to higher voltage current impact, even can exceed the scope that the IGBT device can bear, cause damage.In addition, the uncontrollable electromagnetic oven lost of life that easily causes of voltage.
The utility model content
The purpose of this utility model is intended to solve at least to a certain extent one of above-mentioned technical problem.
For this reason, a purpose of the present utility model is to propose a kind of control circuit of electromagnetic oven, and this control circuit can be controlled the input voltage of resonant tank, thereby can be so that the voltage of resonant tank is more stable, can reduce the temperature rise of IGBT device, improve its reliability.In addition, can extend the useful life of electromagnetic oven.
Another purpose of the present utility model is to propose a kind of electromagnetic oven.
For achieving the above object, the utility model proposes a kind of control circuit of electromagnetic oven on the one hand, and this control circuit comprises: the alternating current of input is converted to galvanic rectification module; For the filtration module that described direct current is carried out to filtering, described filtration module is connected with described rectification module; Resonance modules and power switch, described resonance modules is connected with described power switch; To the voltage regulating module that described galvanic voltage is regulated, described voltage regulating module is connected respectively with described resonance modules with described rectification module; Control respectively the controller of described power switch and described voltage regulating module, described controller is connected respectively with voltage regulating module with described power switch.Described rectification module, described filtration module, described voltage regulating module and described power switch all are connected publicly with same.
Control circuit according to the electromagnetic oven of the utility model embodiment, the pwm signal of the different duty of exporting by controller is controlled voltage regulating module filtered voltage is regulated, thereby make back-end circuit, as resonance modules, power switch, the voltage of accepting is more stable, can so that the input voltage of resonance modules as required power regulate.In addition, electric current and voltage that can the power ratio control switch and make its impact that is not subjected to input voltage, thus more stable, and then make power switch more easily in no-voltage, open lower work.This control circuit can the larger input voltage range of compatibility.
Preferably, when the described voltage regulating module of described controller output pulse width modulation (PWM) signal controlling carries out reduction regulation to described galvanic voltage, described voltage regulating module specifically comprises: the first power tube, one end of described the first power tube is connected with described filtration module, and the control end of described the first power tube is connected with described controller; The first inductance, an end of described the first inductance is connected with the other end of described the first power tube, and the other end of described the first inductance is connected with described resonance modules; The first diode, the line between the other end of described the first power tube and described the first inductance is provided with first node, and the negative end of described the first diode is connected on described first node, and the forward end of described the first diode is connected publicly with described; The first electric capacity, an end of described the first electric capacity is connected with the other end of described the first inductance, and the other end of described the first electric capacity is connected publicly with described.
Preferably, when the described voltage regulating module of described controller output pulse width modulation (PWM) signal controlling boosted adjusting to described galvanic voltage, described voltage regulating module specifically comprised: the second inductance, and an end of described the second inductance is connected with described filtration module; The second diode, the forward end of described the second diode is connected with the other end of described the second inductance, and the negative end of described the second diode is connected with described resonance modules; The second power tube, line between described the second inductance and described the second diode is provided with Section Point, one end of described the second power tube is connected in described the second economize on electricity, the other end of described the second power tube is connected publicly with described, and the control end of described the second power tube is connected with described controller; The second electric capacity, an end of described the second electric capacity is connected with the negative end of described the second diode, and the other end of described the second electric capacity is connected publicly with described.
Particularly, described the first power tube and the second power tube all can be IGBT, one end of described the first power tube and an end of described the second power tube are the C utmost point of IGBT, the other end of the other end of described the first power tube and described the second power tube is the E utmost point of IGBT, and the control end of the control end of described the first power tube and described the second power tube is the G utmost point of IGBT.
Preferably, the voltage of described voltage regulating module output can calculate according to following formula:
Vo=Vi*D; Wherein, Vo is the voltage of described output, and Vi is the voltage that is input to described voltage regulating module, and D is the duty ratio of described pwm signal.
In addition, the voltage of described voltage regulating module output can calculate according to following formula:
Vo=Vi/(1-D); Wherein, Vo is the voltage of described output, and Vi is the voltage that is input to described voltage regulating module, and D is the duty ratio of described pwm signal.
Further, described resonance modules comprises resonant capacitance parallel with one another and resonant inductance.
Preferably, the control circuit of above-mentioned electromagnetic oven also comprises driver module, and an end of described driver module is connected with described controller, and the other end of described driver module is connected with described voltage regulating module with described power switch respectively.
Preferably, the control circuit of above-mentioned electromagnetic oven can also comprise immunity module, and described immunity module is connected between the AC power of described rectification module and input.
For achieving the above object, of the present utility model a kind of electromagnetic oven proposed on the other hand, this electromagnetic oven comprises the control circuit of the electromagnetic oven of above-mentioned proposition.
According to electromagnetic oven of the present utility model, by above-mentioned control circuit, can be so that the power switch of electromagnetic oven be in better safety operation area, more easily in no-voltage, open lower work, extend power switch its useful life, and then extended the life-span of electromagnetic oven, improved the reliability of electromagnetic oven.In addition, electromagnetic oven of the present utility model adopts above-mentioned control circuit, can be so that the wider input voltage range of electromagnetic oven compatibility, and then increase the power regulating range of electromagnetic oven, improved user's satisfaction.
The aspect that the utility model is additional and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
The accompanying drawing explanation
Above-mentioned and/or the additional aspect of the utility model and advantage will become from the following description of the accompanying drawings of embodiments and obviously and easily understand, wherein:
Fig. 1 is the block diagram of control circuit of the electromagnetic oven of prior art;
Fig. 2 is the schematic diagram of the controlling circuit of electromagnetic furnace of prior art;
Fig. 3 is the block diagram according to the control circuit of the electromagnetic oven of the utility model embodiment;
Fig. 4 is the block diagram according to the control circuit of the electromagnetic oven of an embodiment of the present utility model;
Fig. 5 is the schematic diagram according to the control circuit of the electromagnetic oven of an embodiment of the present utility model;
Fig. 6 is the schematic diagram according to the control circuit of the electromagnetic oven of another embodiment of the present utility model; And
Fig. 7 is the block diagram according to the electromagnetic oven of the utility model embodiment.
The accompanying drawing explanation:
Embodiment
Below describe embodiment of the present utility model in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label means same or similar element or the element with identical or similar functions from start to finish.Below by the embodiment be described with reference to the drawings, be exemplary, only be used to explaining the utility model, and can not be interpreted as restriction of the present utility model.
Disclosing hereinafter provides many different embodiment or example to be used for realizing different structure of the present utility model.Of the present utility model open in order to simplify, hereinafter parts and the setting of specific examples are described.Certainly, they are only example, and purpose does not lie in restriction the utility model.In addition, the utility model can be in different examples repeat reference numerals and/or letter.This repetition is in order to simplify and purpose clearly, itself do not indicate the relation between the various embodiment of discuss and/or setting.In addition, the various specific technique that the utility model provides and the example of material, but those of ordinary skills can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, First Characteristic described below Second Characteristic it " on " structure can comprise that the first and second Characteristics creations are the direct embodiment of contact, also can comprise the embodiment of other Characteristics creation between the first and second features, such the first and second features may not be direct contacts.
In description of the present utility model, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be done broad understanding, for example, can be mechanical connection or electrical connection, can be also the connection of two element internals, can be directly to be connected, and also can indirectly be connected by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
With reference to following description and accompanying drawing, by these and other aspects of clear embodiment of the present utility model.In these descriptions and accompanying drawing, specifically disclose some specific implementations in embodiment of the present utility model, mean to implement some modes of the principle of embodiment of the present utility model, but should be appreciated that the scope of embodiment of the present utility model is not limited.On the contrary, embodiment of the present utility model comprises spirit and interior all changes, modification and the equivalent of intension scope that falls into additional claims.
Control circuit according to the electromagnetic oven of the utility model embodiment is described with reference to the accompanying drawings.
As shown in Figure 3, the control circuit of the electromagnetic oven of the utility model embodiment comprises: rectification module 301, resonance modules 302, power switch 303, filtration module 304, voltage regulating module 305 and controller 306.Wherein, rectification module 301 is converted to direct current by the alternating current of input.Resonance modules 302 is connected with power switch 303, and power switch 303 is connected with rectification module 301.Filtration module 304 carries out filtering for the direct current to after rectification, the filtration module power ratio control switch 303 that is connected with filtration module 304, and driver module 304 is connected with power switch 303.305 pairs of galvanic voltages of voltage regulating module are regulated, and voltage regulating module 305 is connected respectively with resonance modules 302 with filtration module 304 rectification modules 301.Controller 306 is power ratio control switch 303 driver modules 304 and voltage regulating module 305 respectively, and controller 306 is connected respectively with power switch 303 driver modules 306 with voltage regulating module 305.Wherein, rectification module 301, filtration module 304, voltage regulating module 305 and power switch 303 all are connected with same GND publicly.
Further, as shown in Figure 4, the control circuit of above-mentioned electromagnetic oven can also comprise: immunity module 401 and driver module 402.Wherein, immunity module 401 is connected between the AC power of rectification module 301 and input.One end of driver module 402 is connected with controller 306, and the other end of driver module 402 is connected with voltage regulating module 305 with power switch 303 respectively.
Particularly, as shown in Figure 5, AC power outputs to immunity module 401, and immunity module 401 can comprise capacitor C 11, and the bipod of C11 is connected across between the live wire and zero line of civil power, disturbs be used to suppressing electrical network.Immunity module 401 export rectification module 301 to, rectification module 301 can comprise rectifier bridge stack element BD21, its inside comprises four diodes, four diodes connect into the full-wave rectification structure, thereby rectification module 301 is output as the direct voltage of pulsation, this direct voltage output is to filtration module 304.Filtration module 304 can comprise inductance L 31 and capacitor C 31, and inductance L 31 is connected with capacitor C 31, one of inductance L 31 is terminated at the output plus terminal of rectification module 301, one of capacitor C 31 is terminated at the output negative terminal (being ground connection GND) of rectification module 301, thereby the output of filtration module 304, be that inductance L 31 is exported with the common point C of capacitor C 31, be level and smooth direct voltage.Filtration module 304 export voltage regulating module 305 to.
Preferably, in an embodiment of the present utility model, as shown in Figure 5, can carry out reduction regulation by 305 pairs of galvanic voltages of controller 306 output pulse width modulation (PWM) signal controlling voltage regulating modules, when carrying out reduction regulation, voltage regulating module 305 specifically comprises for example L41, the first diode 405 D41 and the first electric capacity 406 C41 for example for example of the first power tube 403, the first inductance 404.Wherein, one end of the first power tube 403 is connected with filtration module 304, the control end of the first power tube 403 is connected with controller 306, in an embodiment of the present utility model, the first power tube 403 can be IGBT(Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) IGBT41 shown in Figure 5 for example, the collector electrode that one end of the first power tube 403 is IGBT is the C utmost point, the emitter that the other end of the first power tube 403 is IGBT is the E utmost point, and the gate pole that the control end of the first power tube 403 is IGBT is the G utmost point.One end of the first inductance 404 is connected with the other end of the first power tube 403, and the other end of the first inductance 404 is connected with resonance modules 302.Line between the other end of the first power tube 403 and the first inductance 404 is provided with first node D1, the negative end of the first diode 405 is connected on first node D1, the forward end of the first diode 405 is connected with GND publicly, one end of the first electric capacity 406 is connected with the other end of the first inductance 404, and the other end of the first electric capacity 406 is connected with GND publicly.Particularly, as shown in Figure 5, the output plus terminal of the collector electrode of IGBT41 and filtration module 304 is the common point C1 of inductance L 31 and capacitor C 31, being connected an of end of the emitter of IGBT41 and inductance L 41, the other end of inductance L 41 is connected with capacitor C 41, the other end ground connection of capacitor C 41.In addition, series diode D41 between the emitter of IGBT and ground wire, the effect of diode D41 namely, when IGBT41 turn-offs, makes inductance L 41 can form discharge loop.The effect of voltage regulating module 305 is the smooth dc voltage of filtration module 304 outputs is carried out to copped wave, and the voltage after copped wave carries out smoothly through inductance L 41 and capacitor C 41 again, further forms more level and smooth direct voltage.Owing to having carried out copped wave, so the voltage of its input of voltage ratio of voltage regulating module 305 outputs is little, the size of output voltage depends on controller 306 output pulse width modulation (PWM) signals, and the product of output voltage and duty ratio is namely the voltage of voltage regulating module 305 outputs.
In an embodiment of the present utility model, when controller 306 output pulse width modulation (PWM) signal controlling voltage regulating modules 305 carried out reduction regulation, the voltage of voltage regulating module 305 outputs can calculate according to following formula:
Vo=Vi*D
Wherein, Vo is the voltage of voltage regulating module 305 outputs, and Vi is the voltage that is input to voltage regulating module 305, and D is the duty ratio of pwm signal.Because duty ratio is to be less than 1 constant, so output voltage is less than input voltage, above-mentioned regulating circuit is for example BUCK circuit of reduction voltage circuit, exports resonance modules 302 to through the output voltage after voltage regulating module 305 step-downs.
In an embodiment of the present utility model, as shown in Figure 5, resonance modules 302 comprises resonant capacitance C51 parallel with one another and resonance inductance L 51.Particularly, the output of resonance modules 302, i.e. the resonant inductance L51 other end in parallel with resonant capacitance C51, with power switch 303 for example the collector electrode of IGBT61 be connected, the grounded emitter of IGBT61, the gate pole of IGBT61 is activated the driving of module 304 and controls.
By the voltage after 305 pairs of rectifying and wave-filterings of voltage regulating module, carry out step-down, can provide more stable voltage for resonance modules 302, and then voltage, electric current index that can power ratio control switch 303, in case 303 overvoltages of major structure success rate switch damage, so that the voltage of power switch 303 is more stable.In addition, as required, voltage regulating module 305 can also boost to the voltage after rectifying and wave-filtering, so that the adjustable extent of the input voltage of the control circuit of electromagnetic oven becomes large.
Preferably, in another embodiment of the present utility model, as shown in Figure 6, can be by the adjusting of boosting of 305 pairs of galvanic voltages of controller 306 output pulse width modulation (PWM) signal controlling voltage regulating modules, boosting while regulating, voltage regulating module 305 specifically comprises for example L411, the second diode 602 D411, the second power tube 603 and the second electric capacity 604 C411 for example for example of the second inductance 601.Wherein, an end of the second inductance 601 is connected with filtration module 304.The forward end of the second diode 602 is connected with the other end of the second inductance 601, and the negative end of the second diode 602 is connected with resonance modules 302.Line between the second inductance 601 and the second diode 602 is provided with Section Point D2, one end of the second power tube 603 is connected on Section Point D2, the other end of the second power tube 603 is connected with GND publicly, the control end of the second power tube 603 is connected with controller 306, in an embodiment of the present utility model, the second power tube 603 can be IGBT IGBT411 shown in Figure 6 for example, to be the collector electrode of IGBT be the C utmost point to an end of the second power tube 603, the emitter that the other end of the second power tube 603 is IGBT is the E utmost point, the gate pole that the control end of the second power tube 603 is IGBT is the G utmost point.One end of the second electric capacity 604 is connected with the negative end of the second diode 602, and the other end of the second electric capacity 604 is connected with GND publicly.Particularly, one end of inductance L 411 is connected with the output plus terminal of filtration module 402, the other end of inductance L 411 is connected with the positive pole of diode D411, the negative pole of diode D411 is connected with an end of capacitor C 411, the other end ground connection of capacitor C 411, the positive pole of diode D411 is connected with the collector electrode of IGBT411, the grounded emitter of IGBT411, the gate pole of IGBT411 is subject to controller 306 for example single-chip microcomputer or logic IC(Integrated Circuit, integrated circuit) control.Controller 306 is exported to the pwm control signal of IGBT411 gate pole different duty, and voltage regulating module 305 is exported different voltage, thereby realizes the function of pressure regulation.
In an embodiment of the present utility model, during controller 306 output pulse width modulation (PWM) signal controlling voltage regulating modules 305 boosted and regulate, the voltage of voltage regulating module 305 outputs can calculate according to following formula:
Vo=Vi/（1-D）
Wherein, Vo is the voltage of output, and Vi is the voltage that is input to voltage regulating module 305, and D is the duty ratio of pwm signal.Because duty ratio is to be less than 1 constant, so voltage regulating module 305 output voltages are greater than its input voltage, above-mentioned regulating circuit is for example BOOST circuit of booster circuit, output voltage after boosting through voltage regulating module 305 exports resonance modules 302 to, thereby can be so that the input voltage of resonance modules 302 be subjected to the impact of input AC electricity, and regulate as required, the voltage of resonance modules 302 is more stable.In addition, boost by 305 pairs of voltages of voltage regulating module, can, under the security situation of guaranteed output switch 303, enlarge the adjustable extent of voltage.
In sum, control circuit according to the electromagnetic oven of the utility model embodiment, the pwm signal of the different duty of exporting by controller is controlled voltage regulating module filtered voltage is regulated, thereby make back-end circuit, as resonance modules, power switch, the voltage of accepting is more stable, can be so that the input voltage of resonance modules power and regulating as required.In addition, electric current and voltage that can the power ratio control switch and make its impact that is not subjected to input voltage, thus more stable, and then make power switch more easily in no-voltage, open lower work.This control circuit can the larger input voltage range of compatibility.
In addition, voltage regulating module carries out step-down to voltage, can prevent from causing the power switch overvoltage to damage, and can reduce the temperature rise of power switch, improves its reliability.
Describe according to a kind of electromagnetic oven the utility model proposes with reference to the accompanying drawings.
As shown in Figure 7, be the block diagram of the electromagnetic oven according to the utility model embodiment.
The electromagnetic oven 701 of the utility model embodiment comprises the control circuit 702 of above-described embodiment.
According to electromagnetic oven of the present utility model, by above-mentioned control circuit, can be so that the power switch of electromagnetic oven be in better safety operation area, more easily in no-voltage, open lower work, extend its useful life, and then extended the life-span of electromagnetic oven, improved the reliability of electromagnetic oven.In addition, electromagnetic oven of the present utility model adopts above-mentioned control circuit, can be so that the wider input voltage range of electromagnetic oven compatibility, and then increase the power regulating range of electromagnetic oven, improved user's satisfaction.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that in the situation that do not break away from principle of the present utility model and spirit can be carried out multiple variation, modification, replacement and modification to these embodiment, scope of the present utility model is by claims and be equal to and limit.
Claims (10)
1. the control circuit of an electromagnetic oven, is characterized in that, comprising:
The alternating current of input is converted to galvanic rectification module;
For the filtration module that described direct current is carried out to filtering, described filtration module is connected with described rectification module;
Resonance modules and power switch, described resonance modules is connected with described power switch;
To the voltage regulating module that described galvanic voltage is regulated, described voltage regulating module is connected respectively with described resonance modules with described filtration module;
Control respectively the controller of described power switch and described voltage regulating module, described controller is connected respectively with described voltage regulating module with described power switch;
Described rectification module, described filtration module, described voltage regulating module and described power switch all are connected publicly with same.
2. the control circuit of electromagnetic oven as claimed in claim 1, is characterized in that, when the described voltage regulating module of described controller output pulse width modulation (PWM) signal controlling carried out reduction regulation to described galvanic voltage, described voltage regulating module specifically comprised:
The first power tube, an end of described the first power tube is connected with described filtration module, and the control end of described the first power tube is connected with described controller;
The first inductance, an end of described the first inductance is connected with the other end of described the first power tube, and the other end of described the first inductance is connected with described resonance modules;
The first diode, the line between the other end of described the first power tube and described the first inductance is provided with first node, and the negative end of described the first diode is connected on described first node, and the forward end of described the first diode is connected publicly with described;
The first electric capacity, an end of described the first electric capacity is connected with the other end of described the first inductance, and the other end of described the first electric capacity is connected publicly with described.
3. the control circuit of electromagnetic oven as claimed in claim 1, is characterized in that, when the described voltage regulating module of described controller output pulse width modulation (PWM) signal controlling boosted adjusting to described galvanic voltage, described voltage regulating module specifically comprised:
The second inductance, an end of described the second inductance is connected with described filtration module;
The second diode, the forward end of described the second diode is connected with the other end of described the second inductance, and the negative end of described the second diode is connected with described resonance modules;
The second power tube, line between described the second inductance and described the second diode is provided with Section Point, one end of described the second power tube is connected on described Section Point, the other end of described the second power tube is connected publicly with described, and the control end of described the second power tube is connected with described controller;
The second electric capacity, an end of described the second electric capacity is connected with the negative end of described the second diode, and the other end of described the second electric capacity is connected publicly with described.
4. the control circuit of electromagnetic oven as claimed in claim 2 or claim 3, it is characterized in that, described the first power tube and the second power tube are IGBT, one end of described the first power tube and an end of described the second power tube are the C utmost point of IGBT, the other end of the other end of described the first power tube and described the second power tube is the E utmost point of IGBT, and the control end of the control end of described the first power tube and described the second power tube is the G utmost point of IGBT.
5. the control circuit of electromagnetic oven as claimed in claim 3, is characterized in that, the voltage of described voltage regulating module output calculates according to following formula:
Vo=Vi*D
Wherein, Vo is the voltage of described output, and Vi is the voltage that is input to described voltage regulating module, and D is the duty ratio of described pwm signal.
6. the control circuit of electromagnetic oven as claimed in claim 4, is characterized in that, the voltage of described voltage regulating module output calculates according to following formula:
Vo=Vi/（1-D）
Wherein, Vo is the voltage of described output, and Vi is the voltage that is input to described voltage regulating module, and D is the duty ratio of described pwm signal.
7. as the control circuit of the described electromagnetic oven of claim 1-6 any one, it is characterized in that, described resonance modules comprises resonant capacitance parallel with one another and resonant inductance.
8. the control circuit of electromagnetic oven as claimed in claim 1, is characterized in that, also comprises driver module, and an end of described driver module is connected with described controller, and the other end of described driver module is connected with described voltage regulating module with described power switch respectively.
9. the control circuit of electromagnetic oven as claimed in claim 1, is characterized in that, also comprises immunity module, and described immunity module is connected between the AC power of described rectification module and input.
10. an electromagnetic oven, is characterized in that, comprises as the described control circuit of claim 1-9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013202813445U CN203313438U (en) | 2013-05-21 | 2013-05-21 | An induction cooker and a control circuit thereof |
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| CN2013202813445U CN203313438U (en) | 2013-05-21 | 2013-05-21 | An induction cooker and a control circuit thereof |
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| CN103763803A (en) * | 2014-01-23 | 2014-04-30 | 美的集团股份有限公司 | Electromagnetic resonance control circuit, electromagnetic heating device and method for controlling transistor |
| CN106658796A (en) * | 2016-12-26 | 2017-05-10 | 佛山市顺德区美的电热电器制造有限公司 | Voltage regulator circuit and voltage regulating method |
| CN107438299A (en) * | 2017-09-11 | 2017-12-05 | 浙江绍兴苏泊尔生活电器有限公司 | Electromagnetic oven |
| CN107484284A (en) * | 2017-08-16 | 2017-12-15 | 浙江绍兴苏泊尔生活电器有限公司 | Electromagnetic oven |
| CN107762945A (en) * | 2016-08-18 | 2018-03-06 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heater and its blower control method and fan controller |
| CN108738179A (en) * | 2017-04-14 | 2018-11-02 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heater and its control method |
| CN112469167A (en) * | 2020-12-09 | 2021-03-09 | 成都极米科技股份有限公司 | Voltage adjusting circuit and dimming circuit |
| CN118012212A (en) * | 2023-12-11 | 2024-05-10 | 爱屋(北京)科技有限公司 | Driving circuit of integrated kitchen appliance and power distribution method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103763803B (en) * | 2014-01-23 | 2016-01-20 | 美的集团股份有限公司 | The control method of electromagnetic resonance control circuit, electromagnetic heater and transistor |
| CN103763803A (en) * | 2014-01-23 | 2014-04-30 | 美的集团股份有限公司 | Electromagnetic resonance control circuit, electromagnetic heating device and method for controlling transistor |
| CN107762945B (en) * | 2016-08-18 | 2022-04-05 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating device, fan control method and fan control device thereof |
| CN107762945A (en) * | 2016-08-18 | 2018-03-06 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heater and its blower control method and fan controller |
| CN106658796A (en) * | 2016-12-26 | 2017-05-10 | 佛山市顺德区美的电热电器制造有限公司 | Voltage regulator circuit and voltage regulating method |
| CN108738179A (en) * | 2017-04-14 | 2018-11-02 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heater and its control method |
| CN107484284A (en) * | 2017-08-16 | 2017-12-15 | 浙江绍兴苏泊尔生活电器有限公司 | Electromagnetic oven |
| CN107484284B (en) * | 2017-08-16 | 2020-07-28 | 浙江绍兴苏泊尔生活电器有限公司 | Electromagnetic oven |
| CN107438299A (en) * | 2017-09-11 | 2017-12-05 | 浙江绍兴苏泊尔生活电器有限公司 | Electromagnetic oven |
| CN107438299B (en) * | 2017-09-11 | 2020-09-01 | 浙江绍兴苏泊尔生活电器有限公司 | Electromagnetic oven |
| CN112469167A (en) * | 2020-12-09 | 2021-03-09 | 成都极米科技股份有限公司 | Voltage adjusting circuit and dimming circuit |
| CN112469167B (en) * | 2020-12-09 | 2022-07-01 | 成都极米科技股份有限公司 | Voltage adjusting circuit and dimming circuit |
| CN118012212A (en) * | 2023-12-11 | 2024-05-10 | 爱屋(北京)科技有限公司 | Driving circuit of integrated kitchen appliance and power distribution method thereof |
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