CN201805366U - Circuit for improving energy efficiency of electromagnetic oven and microwave oven - Google Patents
Circuit for improving energy efficiency of electromagnetic oven and microwave oven Download PDFInfo
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- CN201805366U CN201805366U CN2010205149221U CN201020514922U CN201805366U CN 201805366 U CN201805366 U CN 201805366U CN 2010205149221 U CN2010205149221 U CN 2010205149221U CN 201020514922 U CN201020514922 U CN 201020514922U CN 201805366 U CN201805366 U CN 201805366U
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Abstract
The utility model discloses a circuit for improving energy efficiency of an electromagnetic oven and a microwave oven, comprising a power plug, a rectifier module, a power inverter circuit and an SOC control unit, wherein the power plug is connected with the first input end of the SOC control unit by an AC-DC module and is connected with the power inverter circuit by the rectifier module; and the power inverter circuit is connected with the SOC control unit. The circuit is characterized in that the circuit also comprises a drive circuit; the power inverter circuit comprises a parallel resonance module, an impact current suppression module and a first power switch tube; the parallel resonance module is connected with the first power switch tube by the impact current suppression module; the first power switch tube is connected with the first output end of the SOC control unit; and the second output end of the SOC control unit is connected with the first power switch tube by the drive circuit. The circuit resists suppression of the impact of the capacitor in the parallel resonance module on the power switch tube by utilizing the saturation characteristic of the inductor in the impact current suppression module.
Description
Technical field
The utility model relates to a kind of Electromagnetic Control technology, particularly a kind of circuit that is used to improve electromagnetic oven and microwave oven efficiency.
Background technology
In large power supply conversion and induction heating field, resonant circuit structure comprises series resonance and parallel resonance.Wherein parallel resonance has the advantage that circuit structure is simple, efficient is high, cost is low, is widely used in the field of induction heating such as electromagnetic oven, microwave oven and high efficiency of power supply conversion.
But owing to the intrinsic circuit structure characteristics of parallel resonance, this resonant circuit can not be suitable for bigger power adjustment, and when power hanged down with power greatly, all can there be the high problem of loss heating in power switch pipe.
When power is high, be to manage the consumption heating normally by power switch pipe, and power is when being opened by the each non-zero-voltage-switch state of circuit structure decision when low, the electric capacity of main shunt-resonant circuit is opened the rush of current of the ac short circuit of moment to power switch pipe at power switch pipe, the impulse current loss heating that causes.
See also Fig. 1, before power switch pipe is opened, the voltage difference at power switch pipe two ends is exactly the initial voltage point of electric capacity in the resonant circuit, power tube is opened and is made this voltage difference near 0V, get on the rank that are the resonant capacitance two ends generation voltage in the resonant circuit, because the time that power tube is opened is very short, the rank of capacitance voltage cause the impact of capacitance current more, make the emitter of power tube sharp cutting edge of a knife or a sword electric current occur, and the impact of this electric current is applied to and cause heating on the power switch pipe even damage.
Yet, this specific character also requires the main resonance capacitance parameter of antiresonant circuit structure can not be excessive, otherwise the excessive power switch pipe that easily causes of impulse current damages, and the too small meeting of electric capacity makes the power switch pipe of parallel resonance can bear high resonance potential under identical power, thereby determined that the plant capacity adjusting range only is a less relatively zone, this power can not be too small or excessive present situation, caused the electromagnetic oven power of existing family expenses parallel resonance structure to be generally 800W to 2400W, and 800W can not continuous operation.And the equipment of high-power scope must cascaded structure complexity, expensive half-bridge or full-bridge circuit realize, and, make circuit structure complexity, cost height, control difficult.
The inherent shortcoming that prior art all is subject to the parallel resonance module to the application mode and the improvement method of electromagnetic oven, generally weaken this defect influence to the distance of solenoid by reduction energy conversion efficiency, the electromagnetic oven increasing the bottom of a pan, weaken of the restriction of this defective by reducing supply voltage or intermittent duty to the power lower limit, and this defective is to the restriction of main resonance capacitance parameter in the circuit, makes in microwave oven, the high power switching power supply and to be subjected to great application limitations because of back-pressure is excessive.
Thereby the Electromagnetic Control technology that has now based on the parallel resonance module is still waiting to improve and improve.
The utility model content
In view of above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of circuit that is used to improve electromagnetic oven and microwave oven efficiency, when the power switch pipe under non-zero status provides energy initial for the parallel resonance module, can suppress of the impact of parallel resonance module to power switch pipe.
In order to achieve the above object, the utility model has been taked following technical scheme:
A kind of circuit that is used to improve electromagnetic oven and microwave oven efficiency, it comprises attaching plug, rectification module, power inversion circuit and SOC control unit; Described attaching plug connects the first input end of described SOC control unit by the AC-DC module, and described attaching plug also connects described power inversion circuit by described rectification module; Described power inversion circuit is connected with described SOC control unit; Wherein, also comprise drive circuit, described power inversion circuit comprises the parallel resonance module, and impulse current suppresses the module and first power switch pipe; Described parallel resonance module suppresses module by described impulse current and is connected with first power switch pipe, and described first power switch pipe is connected with first output of described SOC control unit; Second output of described SOC control unit is connected with described first power switch pipe by described drive circuit.
The described circuit that is used to improve electromagnetic oven and microwave oven efficiency, wherein, described impulse current suppresses module and is made of diode, first inductance and the first electric capacity parallel connection, and the anode of described diode connects described first power switch pipe, and negative electrode connects described parallel resonance module.
The described circuit that is used to improve electromagnetic oven and microwave oven efficiency wherein, comprises also being used for IGBT temperature sampling module that the first power switch pipe temperature is sampled that described IGBT temperature sampling module is connected with second input of SOC control unit.
The described circuit that is used to improve electromagnetic oven and microwave oven efficiency wherein, also comprises the opening and closing of control entire circuit, and the switch and the display module of data demonstration, and described switch and display module are connected with the 3rd input of described SOC control unit.
The described circuit that is used to improve electromagnetic oven and microwave oven efficiency wherein, also is provided with a filter between described rectification module and parallel resonance module.
The described circuit that is used to improve electromagnetic oven and microwave oven efficiency, wherein, described filter comprises second inductance and second electric capacity; Described second inductance is connected between described rectification module and the parallel resonance module, and an end of described second electric capacity connects described second inductance, other end ground connection.
The described circuit that is used to improve electromagnetic oven and microwave oven efficiency wherein, also comprises second power switch pipe, and the collector electrode of described second power switch pipe connects described parallel resonance module, and base stage is connected with described drive circuit with emitter.
The described circuit that is used to improve electromagnetic oven and microwave oven efficiency, wherein, described parallel resonance module is made of solenoid and the 3rd electric capacity parallel connection.
The described circuit that is used to improve electromagnetic oven and microwave oven efficiency, wherein, described parallel resonance module is made of transformer and the 3rd electric capacity parallel connection.
A kind of circuit that is used to improve electromagnetic oven and microwave oven efficiency that the utility model provides, owing to adopted and between parallel resonance module and power switch pipe, inserted an impulse current inhibition module, utilize impulse current to suppress the saturation characteristic of inductance in the module, (be power switch pipe when opening impulse current to suppress module be that inductive load is serially connected between the electric capacity and power switch pipe in the parallel resonance module) anti-has suppressed electric capacity in the parallel resonance module to the impact of power switch pipe.And after power switch pipe is opened, along with flowing through the increase that impulse current suppresses electric current in the module inductance, impulse current suppresses the inductance convergence magnetic saturation in the module, inductance value is descended, impulse current suppresses module and shows as very little impedance and allow electric current to pass through, having reached power switch pipe does not have to impact by power supply and is the purpose of parallel resonance module makeup energy, and has realized following beneficial effect:
1, this mode has reduced the required distance to the coil panel and the bottom of a pan in the electromagnetic oven of parallel resonance is used, and coil panel and the bottom of a pan distance reduce to improve the energy coupling in the coil panel and the bottom of a pan, thereby improves the energy conversion efficiency of the type electromagnetic oven;
2, this mode is in the application of parallel resonance, reduced the upper limit requirement of main resonance capacitance parameter in the parallel resonance module, that is: the resonant capacitance parameter of shunt-resonant circuit can strengthen, and reduced the peak value high pressure of resonant circuit, improved the maximum power of product, reduced minimum power, thereby the power bracket and the range of application of parallel resonance have been widened, variable frequency microwave stove of the power conversion of parallel resonance and parallel resonance etc. particularly is for the less low back-pressure of the inductance value of main parallel resonant inductor/transformer in the parallel resonance module provides application;
When 3, the capacitance voltage in impulse current inhibition module is near zero point, being that main parallel resonant inductor power supply utilizes impulse current to suppress the saturation characteristic of inductance in the module, is parallel resonance module makeup energy for second power switch pipe before impulse current suppresses module (impulse current suppresses the back) near zero-voltage-switch the time in the mode that continues further.
Description of drawings
Fig. 1 is prior art power switch pipe emitter current, voltage oscillogram;
Fig. 2 is the circuit theory diagrams that are used to improve electromagnetic oven and microwave oven efficiency of the present utility model;
Fig. 3 is the circuit diagram of the utility model first embodiment;
Fig. 4 is the circuit diagram of the utility model second embodiment.
Embodiment
The utility model provides a kind of circuit that is used to improve electromagnetic oven and microwave oven efficiency, employing inserts an impulse current and suppresses module between the parallel resonance module and first power switch pipe, when making power switch pipe under the non-zero pressure condition, open the parallel resonance module, suppressed of the impact of parallel resonance module to power switch pipe.
For making the purpose of this utility model, technical scheme and effect clearer, clear and definite, below with reference to accompanying drawing and give an actual example the utility model is further described.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
See also Fig. 2, the circuit that is used to improve electromagnetic oven and microwave oven efficiency of the present utility model comprises attaching plug 110, rectification module BG1, AC-DC (Alternating Current-Direct Current exchanges and is converted to direct current) module 130, power inversion circuit 140, SOC control unit 150 and drive circuit 160.Described attaching plug 110 is used for the incoming transport power supply, it connects described SOC control unit 150 first input ends by AC-DC module 130, described attaching plug 110 also connects described power inversion circuit 140 by described rectification module BG1, and described power inversion circuit 140 is connected with described SOC control unit 150.
Described power inversion circuit 140 is used for the trigger-type pulse-width signal according to 150 outputs of SOC control unit, improves and reduce the power output of entire circuit.The LCLD topological structure that this power inversion circuit 140 is made up of parallel resonance module 141, impulse current inhibition module 142 and the first power switch pipe IGBT1.Wherein, L represents that inductance, C represent that electric capacity, D represent diode.
Wherein, described parallel resonance module 141 suppresses module 142 by described impulse current and is connected with the first power switch pipe IGBT1, and the described first power switch pipe IGBT1 is connected with first output of described SOC control unit 150; Second output of described SOC control unit 150 is connected with the described first power switch pipe IGBT1 by described drive circuit 160.
Described rectification module BG1 and AC-DC module 130, be used for alternating current is converted to direct current, SOC control unit 150 is the control core of entire circuit, be used to export trigger-type pulse-width signal (PWM) thus promote described power inversion circuit 140 work to outside drive circuit 160.
Wherein, described SOC control unit 150 adopts SIM-DLC-IC (the design name of chip) type SOC (System on Chip, System on Chip/SoC) chip, be integrated with CPU (Central Processing Unit, central processing unit), programmable logic device, some comparators, operational amplifier, communication interface etc. in this chip.
Described SOC control unit 150 is a higher management with CPU, comprises PPG generator (Programmable Plus Generator programmable pulse generator) in programming device, triggers control logic, protection and adjustment control logic, inspection pot counter etc.Comparator acquisition controlling signal is given programming device, and constitute the special logic controller with programming device, CPU controls this logic controller through bus interface, thereby the control register and the status register of read-write logic controller inside, and produce interrupt request singal by this logic controller and give CPU, notice CPU handles special status.
For the temperature of the heating that prevents the first power switch pipe IGBT1 too high, second input at described SOC control unit 150 is provided with an IGBT temperature sampling module 170, be used for the variations in temperature of this first power switch pipe IGBT1 is sampled, and this IGBT temperature is adopted module and is given SOC control unit 150 with the form of direct voltage, the SOC control unit carries out the temperature data that analog-to-digital conversion obtains the first power switch pipe IGBT1 by the ADC module, and adjusts the power-on time of the first power switch pipe IGBT1 according to these data.
In a further embodiment, the circuit that is used to improve electromagnetic oven and microwave oven efficiency of the present utility model also comprises a switch and display module 180, this switch and display module 180 are connected with the 3rd input of described SOC control unit 150, be used to control the opening and closing of entire circuit, and data show.Yet the user can need the data of regulating by 180 inputs of this switch and display module, for example, power, time, temperature etc., and switch and display module 180 data presented are in temperature, time or the power one or more.
In the present embodiment, the circuit of complete machine uses serial line interface UART (Universal Asynchronous Receiver/Transmitter, general asynchronous receiving-transmitting transmitter) to be connected with switch and display module 180, isolates by photoelectricity and can improve fail safe.
Further, the 3rd output at SOC control unit 150 is provided with the fan 191 that is used to dispel the heat, the 4th output at SOC control unit 150 is provided with the loudspeaker 192 that are used to play sound, and this fan 191 and loudspeaker 192 are by 150 its work of control of SOC control unit.
First embodiment of the present utility model is the application of single tube electromagnetic oven, sees also Fig. 3, and described impulse current suppresses module 142 and is made of diode D1, first inductance L 1 and 1 parallel connection of first capacitor C.Described diode D1 comprises two diodes parallel with one another.
The anode of described diode D1 connects the described first power switch pipe IGBT1, and negative electrode connects described parallel resonance module 141.The collector electrode of described power switch pipe connects described impulse current and suppresses module 142, and base stage is connected drive circuit 160 with emitter, is used for opening when SOC control unit 150 output PPG signals, gives the parallel resonance module 141 power supplies.
Described first inductance L 1 is used for the first power switch pipe IGBT1 when the non-zero pressure condition is opened, absorb the electric weight of described parallel resonance module 141, thereby suppress the impact of 141 couples first power switch pipe IGBT1 of parallel resonance module, promptly weaken the sharp cutting edge of a knife or a sword electric current among Fig. 1.So described first inductance L 1 also is referred to as to suppress the current break inductance, described diode D1 is the fast diode of this inductance afterflow, mainly play quick afterflow effect, in the present embodiment, described first inductance L 1 is selected the green magnet ring inductance of 75uH for use, and diode D1 selects the fast diode of 30A for use.
Please continue to consult Fig. 2 and Fig. 3, between described rectification module BG1 and parallel resonance module 141, be provided with a filter 120, this filter 120 is used for the interference of filtering circuit, it comprises second inductance L 2 and second capacitor C 2, described second inductance L 2 is a choke induction, and be connected between described rectification module BG1 and the parallel resonance module 141, an end of described second capacitor C 2 connects described second inductance L 2, other end ground connection.
SOC control unit 150 for the first time can PPG signal of spontaneous output, and the output of the 12nd pin by SOC chip (being SOC control unit 150), being used to drive the first power switch pipe IGBT1 gives the parallel resonance module 141 power supplies, thereafter by the voltage relationship triggering phase shift timer (in figure do not mark) of synchronous triggering end according to reference synchronization end (being the 16th pin of SOC chip), trigger PPG output by the phase shift timer, the realization digital phase shift triggers, thereby ceaselessly export driving pulse, drive first power switch pipe IGBT1 work through drive circuit 160, opening the first power switch pipe IGBT1 near zero point the time is 141 power supplies of parallel resonance module.
The 15th pin of SOC control unit 150 provides the high-pressure limit sampling of a parallel resonance module 141 simultaneously by the voltage in a voltage sampling circuit (not marking among the figure) the measurement parallel resonance module 141.When the voltage of parallel resonance module 141 reaches this restriction; resonance amplitude in the expression parallel resonance module 141 is excessive; SOC control unit 150 reduces the power-on times to first power tube automatically, the amplitude that guarantees resonance in claimed range, thereby protect this first power switch pipe IGBT1.
SOC control unit 150 obtains the surge superpressure sampling of antiresonant circuit by resistance R 15, the utility model has adopted the digital phase shift technology, in the sampling circuit of the reference synchronization end of SOC control unit 150, do not have capacitive device, so supply voltage surge, superpressure testing circuit are also obtained from reference synchronization end sampling circuit.When power supply sudden change and superpressure, control SOC control unit 150 stops to export the signal that drives the first power switch pipe IGBT1, and it is unusual to produce interrupt signal notice CPU simultaneously.
In this implementation column, SOC control unit 150 carries out current detecting by rheostat VR1 to complete machine, and current detection circuit is after the amplifier amplification filtering of SOC control unit 150 inside, give ADC module (the Analog Digital Converter of SOC control unit CPU inside, analog-digital commutator) modulus signal is converted to digital signal, as the operating current use of complete machine (being electromagnetic oven).
Similar, SOC control unit 150 carries out the alternating voltage sampling of power supply input by resistance R 11, give the ADC module of CPU after the same filtering of this alternating voltage, as the supply voltage amount, and the operating power that can calculate complete machine according to operating current and this supply voltage of complete machine.
In the present embodiment, IGBT temperature sampling module 170 is by the 6th pin input of SOC control unit 150, and SOC control unit 150 obtains the temperature of the first power switch pipe IGBT1 by the ADC module converts of SOC control unit inside.And be provided with a cooking bottom temperature testing circuit (not marking among the figure) in the bottom of a pan of electromagnetic oven, SOC control unit 150 obtains the temperature in the bottom of a pan by the cooking bottom temperature testing circuit.And this cooking bottom temperature testing circuit also is to give SOC control unit 150 with the form of direct voltage with the temperature of its acquisition, SOC control unit 150 obtains this temperature data by the ADC module, and according to the power-on time of this data adjustment to the first power switch pipe IGBT1.
Please consult Fig. 3 once more, described parallel resonance module 141 is made of solenoid CN3, CN4 and 3 parallel connections of the 3rd capacitor C, and this solenoid CN3, CN4 are the coil panel that heats in the electromagnetic oven, and the 3rd capacitor C 3 is main resonance electric capacity.
In the present embodiment, the solenoid of described coil panel 87uH, the 3rd capacitor C 3 is selected the main resonance electric capacity (main resonance electric capacity is not more than 0.33uF in the parallel resonance electromagnetic oven of family expenses usually) of 0.4uF for use.
When electromagnetic oven is operated in 3000W, the voltage of parallel resonance module 141 only is 900V, when when electromagnetic oven is operated in 800W, the voltage of parallel resonance module 141 is 270V, and the temperature stabilization of power switch pipe IGBT has realized widening power bracket at 90 ℃, reduces the purpose of resonance potential.
And solenoid only is decided by structural requirement and Distribution of Magnetic Field apart from the distance in the bottom of a pan, it is overheated and must be greater than 11mm no longer to be subject to the former parallel resonance power switch pipe due to impacting, and the distance between the solenoid and the bottom of a pan reduces, strengthened the coupling of solenoid and pot, reduced the energy consumption of solenoid, reduce the temperature of solenoid, thereby improve the efficiency of complete machine.
Second Application Example of the present utility model, see also Fig. 4, the difference of this embodiment and first embodiment only is, in the circuit of complete machine, also be provided with one second power switch pipe IGBT2, the collector electrode of this second power switch pipe IGBT2 connects described parallel resonance module 141, and base stage is connected with described drive circuit 160 with emitter.When complete machine is worked, by SOC control unit 150 control Driver Circuit 160 the first power switch pipe IGBT1 is opened, wait circuit working stable after, open the second power switch pipe IGBT2, when so this second power switch pipe IGBT2 is mainly used in complete machine work, the continued access of electric current.It is the second power switch pipe IGBT2 (after impulse current inhibition) near zero-voltage-switch the time that present embodiment has also utilized the saturation characteristic of described first inductance L 1, is that parallel resonance module 141 has been replenished energy in the mode that continues.
When the circuit application that is used for improving electromagnetic oven and microwave oven efficiency of the present utility model during in the microwave oven technology, except the formation of parallel resonance module 141 with the foregoing description is different, other functional module and working method are all same as the previously described embodiments, in the application circuit of microwave oven, described parallel resonance module 141 is made of transformer and 3 parallel connections of the 3rd capacitor C.
In sum, a kind of circuit that is used to improve electromagnetic oven and microwave oven efficiency that the utility model provides, owing to adopted and between parallel resonance module and power switch pipe, inserted an impulse current inhibition module, when power switch pipe provides energy initial for the parallel resonance module under the non-zero pressure condition, utilize impulse current to suppress the saturation characteristic of inductance in the module, (be power switch pipe when opening impulse current to suppress module be that inductive load is serially connected between the electric capacity and power switch pipe in the parallel resonance module) anti-has suppressed electric capacity in the parallel resonance module to the impact of power switch pipe.And after power switch pipe is opened, along with flowing through the increase that impulse current suppresses electric current in the module inductance, impulse current suppresses the inductance convergence magnetic saturation in the module, inductance value is descended, impulse current suppresses module and shows as very little impedance and allow electric current to pass through, having reached power switch pipe does not have to impact by power supply and is the purpose of parallel resonance module makeup energy, and has realized following beneficial effect:
1, this mode has reduced the required distance to the coil panel and the bottom of a pan in the electromagnetic oven of parallel resonance is used, and coil panel and the bottom of a pan distance reduce to improve the energy coupling in the coil panel and the bottom of a pan, thereby improves the energy conversion efficiency of the type electromagnetic oven;
2, this mode is in the application of parallel resonance, reduced the upper limit requirement of main resonance capacitance parameter in the parallel resonance module, that is: the resonant capacitance parameter of shunt-resonant circuit can strengthen, and reduced the peak value high pressure of resonant circuit, improved the maximum power of product, reduced minimum power, thereby the power bracket and the range of application of parallel resonance have been widened, variable frequency microwave stove of the power conversion of parallel resonance and parallel resonance etc. particularly is for the less low back-pressure of the inductance value of main parallel resonant inductor/transformer in the parallel resonance module provides application;
When 3, the capacitance voltage in impulse current inhibition module is near zero point, being that main parallel resonant inductor power supply utilizes impulse current to suppress the saturation characteristic of inductance in the module, is parallel resonance module makeup energy for second power switch pipe before impulse current suppresses module (impulse current suppresses the back) near zero-voltage-switch the time in the mode that continues further.
More than the utility model is described in detail, for those of ordinary skills, can be improved according to the above description or conversion, and all these improve and conversion all should belong to the protection range of the utility model claims.
Claims (9)
1. circuit that is used to improve electromagnetic oven and microwave oven efficiency, it comprises attaching plug, rectification module, power inversion circuit and SOC control unit; Described attaching plug connects the first input end of described SOC control unit by the AC-DC module, and described attaching plug also connects described power inversion circuit by described rectification module; Described power inversion circuit is connected with described SOC control unit; It is characterized in that also comprise drive circuit, described power inversion circuit comprises the parallel resonance module, impulse current suppresses the module and first power switch pipe; Described parallel resonance module suppresses module by described impulse current and is connected with first power switch pipe, and described first power switch pipe is connected with first output of described SOC control unit; Second output of described SOC control unit is connected with described first power switch pipe by described drive circuit.
2. the circuit that is used to improve electromagnetic oven and microwave oven efficiency according to claim 1, it is characterized in that, described impulse current suppresses module and is made of diode, first inductance and the first electric capacity parallel connection, and the anode of described diode connects described first power switch pipe, and negative electrode connects described parallel resonance module.
3. the circuit that is used to improve electromagnetic oven and microwave oven efficiency according to claim 1, it is characterized in that, also comprise being used for IGBT temperature sampling module that the first power switch pipe temperature is sampled, described IGBT temperature sampling module is connected with second input of SOC control unit.
4. the circuit that is used to improve electromagnetic oven and microwave oven efficiency according to claim 1, it is characterized in that, also comprise the opening and closing of control entire circuit, and the switch and the display module of data demonstration, described switch and display module are connected with the 3rd input of described SOC control unit.
5. the circuit that is used to improve electromagnetic oven and microwave oven efficiency according to claim 1 is characterized in that, also is provided with a filter between described rectification module and parallel resonance module.
6. the circuit that is used to improve electromagnetic oven and microwave oven efficiency according to claim 5 is characterized in that described filter comprises second inductance and second electric capacity; Described second inductance is connected between described rectification module and the parallel resonance module, and an end of described second electric capacity connects described second inductance, other end ground connection.
7. the circuit that is used to improve electromagnetic oven and microwave oven efficiency according to claim 1, it is characterized in that, also comprise second power switch pipe, the collector electrode of described second power switch pipe connects described parallel resonance module, and base stage is connected with described drive circuit with emitter.
8. the circuit that is used to improve electromagnetic oven and microwave oven efficiency according to claim 1 is characterized in that, described parallel resonance module is made of solenoid and the 3rd electric capacity parallel connection.
9. the circuit that is used to improve electromagnetic oven and microwave oven efficiency according to claim 1 is characterized in that, described parallel resonance module is made of transformer and the 3rd electric capacity parallel connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205149221U CN201805366U (en) | 2010-08-27 | 2010-08-27 | Circuit for improving energy efficiency of electromagnetic oven and microwave oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205149221U CN201805366U (en) | 2010-08-27 | 2010-08-27 | Circuit for improving energy efficiency of electromagnetic oven and microwave oven |
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| CN201805366U true CN201805366U (en) | 2011-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010205149221U Expired - Fee Related CN201805366U (en) | 2010-08-27 | 2010-08-27 | Circuit for improving energy efficiency of electromagnetic oven and microwave oven |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102339085A (en) * | 2011-05-27 | 2012-02-01 | 深圳和而泰智能控制股份有限公司 | Measuring and controlling device for electromagnetic power device |
| CN105517216A (en) * | 2014-09-25 | 2016-04-20 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating control device and electromagnetic heating device |
| CN106136933A (en) * | 2015-04-07 | 2016-11-23 | 佛山市顺德区美的电热电器制造有限公司 | Cooking apparatus and the electric heater unit for cooking apparatus |
| CN106922044A (en) * | 2017-04-05 | 2017-07-04 | 深圳戴普森新能源技术有限公司 | A kind of microwave oven supply power circuit and micro-wave oven |
| CN114079385A (en) * | 2021-11-23 | 2022-02-22 | 吕真 | Power supply circuit based on synchronous driving LLC resonant circuit series-parallel conversion |
-
2010
- 2010-08-27 CN CN2010205149221U patent/CN201805366U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102339085A (en) * | 2011-05-27 | 2012-02-01 | 深圳和而泰智能控制股份有限公司 | Measuring and controlling device for electromagnetic power device |
| CN105517216A (en) * | 2014-09-25 | 2016-04-20 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating control device and electromagnetic heating device |
| CN106136933A (en) * | 2015-04-07 | 2016-11-23 | 佛山市顺德区美的电热电器制造有限公司 | Cooking apparatus and the electric heater unit for cooking apparatus |
| CN106136933B (en) * | 2015-04-07 | 2018-09-11 | 佛山市顺德区美的电热电器制造有限公司 | Cooking apparatus and electric heater unit for cooking apparatus |
| CN106922044A (en) * | 2017-04-05 | 2017-07-04 | 深圳戴普森新能源技术有限公司 | A kind of microwave oven supply power circuit and micro-wave oven |
| CN106922044B (en) * | 2017-04-05 | 2023-09-01 | 深圳戴普森新能源技术有限公司 | Microwave oven power supply circuit and microwave oven |
| CN114079385A (en) * | 2021-11-23 | 2022-02-22 | 吕真 | Power supply circuit based on synchronous driving LLC resonant circuit series-parallel conversion |
| CN114079385B (en) * | 2021-11-23 | 2023-07-28 | 吕真 | LLC resonant circuit series-parallel conversion power supply circuit based on synchronous drive |
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