CN104754790A - Frequency-conversion microwave oven power supply capable of being controlled in decoupling manner - Google Patents
Frequency-conversion microwave oven power supply capable of being controlled in decoupling manner Download PDFInfo
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- CN104754790A CN104754790A CN201510157903.5A CN201510157903A CN104754790A CN 104754790 A CN104754790 A CN 104754790A CN 201510157903 A CN201510157903 A CN 201510157903A CN 104754790 A CN104754790 A CN 104754790A
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Abstract
The invention relates to a frequency-conversion microwave oven power supply capable of being controlled in a decoupling manner. The frequency-conversion microwave oven power supply capable of being controlled in the decoupling manner comprises a pre-adjusting voltage circuit and an LLC (logic link control) resonant type power converter, wherein the pre-adjusting voltage circuit supplies power for the LLC resonant type power converter; the LLC resonant type power converter is provided with two outputs; one of the two outputs supplies power for a magnetron lamp filament via a capacitor from a lamp filament power winding; the other output supplies power for a magnetron anode via a voltage doubling rectifying circuit from an anode power winding; and the LLC resonant power converter works in a mode of zero voltage starting of a switch tube and zero voltage closing of a secondary winding rectifier diode. By the frequency-conversion microwave oven power supply, the voltage of the lamp filament and the voltage of the anode can be adjusted independently.
Description
Technical field
The present invention relates to a kind of frequency-conversion microwave oven power supply, particularly relate to a kind of can the frequency-conversion microwave oven power supply of uneoupled control.
Background technology
In order to give the anode of magnetron and energize filaments, current frequency-conversion microwave oven power supply have employed two kinds of supply power modes: one is independently-powered, and namely anode and filament are powered by independently power supply respectively; Two is that the power supply of an employing multi output is powered.The former advantage is that actualizing technology is comparatively ripe, and can provide multiple magnetron control model for microwave oven control system, shortcoming is that manufacturing cost is high, and brings new Insulation Problems to filament supply; The advantage of the latter is low cost of manufacture, compared with the supply power mode of traditional leakage transformer, does not increase new Insulation Problems, and its shortcoming is that filament supply voltage can only follow anode supply voltage change, can not realize the independent regulation of filament supply voltage
Summary of the invention
Technical problem to be solved by this invention be to provide a kind of can the frequency-conversion microwave oven power supply of uneoupled control, make the Independent adjustable of filament voltage and anode voltage.
The technical solution adopted for the present invention to solve the technical problems is: provide a kind of can the frequency-conversion microwave oven power supply of uneoupled control, comprise pre-adjustment potential circuit and LLC resonance type power converter, described pre-adjustment potential circuit is powered to described LLC resonance type power converter, it is characterized in that, described LLC resonance type power converter is with two groups of outputs, by filament supply winding, through electric capacity, power to magnetron heater for one group; One group by anode supply winding through voltage doubling rectifing circuit, power to anode of magnetron; The no-voltage that described LLC resonance type power converter runs on switching tube opens the mode of operation with the zero-current switching of secondary rectifier diode.
Described pre-adjustment potential circuit adopts the PFC circuit of power factor correction based on boost.
Described LLC resonance type power converter is asymmetrical half-bridge LLC resonant converter, symmetrical half bridge LLC resonant converter or full-bridge LLC resonant converter.
Beneficial effect
Owing to have employed above-mentioned technical scheme, the present invention compared with prior art, has following advantage and good effect: the present invention, on same LLC resonance type power converter, achieves the independent regulation of anode of magnetron voltage and filament voltage.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Embodiment
Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
Embodiments of the present invention relate to a kind of can the frequency-conversion microwave oven power supply of uneoupled control, as shown in Figure 1, comprise pre-adjustment potential circuit 2 and LLC resonance type power converter 3, described pre-adjustment potential circuit 2 is powered to described LLC resonance type power converter 3, described LLC resonance type power converter 3 is with two groups of outputs, by filament supply winding, through electric capacity 4, power to magnetron heater 5 for one group; One group by anode supply winding through voltage doubling rectifing circuit 6, power to anode of magnetron 7; The no-voltage that described LLC resonance type power converter 3 runs on switching tube opens the mode of operation with the zero-current switching of secondary rectifier diode.By the adjustment regulating the voltage value of LLC resonant converter to reach antianode voltage.By regulating the switch operating frequency of LLC resonant converter, regulating electric capacity 4 capacitive reactance in filament loop, regulating filament voltage.Like this, anode of magnetron voltage is just achieved and filament voltage is independently adjustable.
Be not difficult to find, the present invention is connected in series the direct-coupling that an electric capacity eliminates Filament Winding output voltage and filament voltage in heater chain, and pass through the supply power voltage and the switching frequency that change LLC resonance type power converter, realize the Independent adjustable of filament voltage and anode voltage.
The present invention is further illustrated below with a specific embodiment.
In this embodiment, main circuit adopts asymmetrical half-bridge LLC resonant converter topological structure, and pre-adjustment potential circuit adopts the PFC circuit of power factor correction based on boost.
Electric main after rectification circuit 1 rectification, then by PFC circuit of power factor correction 2, obtains comparatively level and smooth direct current, for LLC resonant power converter 3 is powered.LLC resonant converter 3 adopts asymmetrical half-bridge topological structure, and when normally working, the no-voltage that it runs on switching tube opens the mode of operation with the zero-current switching of secondary rectifier diode.The Filament Winding low pressure winding of high frequency transformer, after electric capacity 4, connects the filament 5 of magnetron.Voltage doubling rectifing circuit 6 is connect, for the anode 7 of magnetron provides high voltage direct current after the anode supply high pressure winding of high frequency transformer.The anode supply voltage given for certain and filament supply voltage, switch operating frequency and the voltage value deterministic process of its LLC resonant converter are: first according to anode supply voltage value, calculate Filament Winding magnitude of voltage, again according to filament supply value, calculate the pressure drop of electric capacity, and calculate the operating frequency of switch with this; By operating frequency and anode supply voltage value, inquiry gain curve, obtains the voltage value of LLC resonant converter, and using the output voltage desired value of this voltage value as the PFC power factor correction circuit of last joint.
Though it should be pointed out that this example is for asymmetrical half-bridge LLC resonant converter, is not limited to this converter, applicable equally to other LLC resonant converter such as full-bridge LLC resonant converter and symmetrical half bridge LLC resonant converter.
Claims (3)
1. one kind can the frequency-conversion microwave oven power supply of uneoupled control, comprise pre-adjustment potential circuit (2) and LLC resonance type power converter (3), described pre-adjustment potential circuit (2) is powered to described LLC resonance type power converter (3), it is characterized in that, described LLC resonance type power converter (3) is with two groups of outputs, by filament supply winding, through electric capacity (4), power to magnetron heater (5) for one group; One group by anode supply winding through voltage doubling rectifing circuit (6), power to anode of magnetron (7); The no-voltage that described LLC resonance type power converter (3) runs on switching tube opens the mode of operation with the zero-current switching of secondary rectifier diode.
2. according to claim 1 can the frequency-conversion microwave oven power supply of uneoupled control, it is characterized in that, described pre-adjustment potential circuit (2) adopts the PFC circuit of power factor correction based on boost.
3. according to claim 1 can the frequency-conversion microwave oven power supply of uneoupled control, it is characterized in that, described LLC resonance type power converter (3) is asymmetrical half-bridge LLC resonant converter, symmetrical half bridge LLC resonant converter or full-bridge LLC resonant converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510157903.5A CN104754790A (en) | 2015-04-03 | 2015-04-03 | Frequency-conversion microwave oven power supply capable of being controlled in decoupling manner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510157903.5A CN104754790A (en) | 2015-04-03 | 2015-04-03 | Frequency-conversion microwave oven power supply capable of being controlled in decoupling manner |
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| CN104754790A true CN104754790A (en) | 2015-07-01 |
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| CN201510157903.5A Pending CN104754790A (en) | 2015-04-03 | 2015-04-03 | Frequency-conversion microwave oven power supply capable of being controlled in decoupling manner |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767402A (en) * | 2015-04-17 | 2015-07-08 | 东华大学 | Inverter microwave oven power supply adopting multi-output bridge-type power converter |
| CN105429206A (en) * | 2015-11-25 | 2016-03-23 | 许继电源有限公司 | Combined power supply apparatus |
| CN106597940A (en) * | 2016-12-15 | 2017-04-26 | 合肥捷曼信息科技有限公司 | Data decoupling-based intelligent power source |
| CN107546999A (en) * | 2017-08-22 | 2018-01-05 | 浙江大学 | A kind of band active power decouples single-phase ZVT inverter circuit and its modulator approach |
| CN108601130A (en) * | 2018-05-20 | 2018-09-28 | 深圳戴普森新能源技术有限公司 | Magnetron power source circuit and control method, micro-wave oven |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5250775A (en) * | 1991-03-20 | 1993-10-05 | Matsushita Electric Industrial Co., Ltd. | Electric cooking apparatus adapted for generating high power output containing a battery |
| CN1315736A (en) * | 2000-03-31 | 2001-10-03 | 三星电子株式会社 | Transformer |
| KR20110138997A (en) * | 2010-06-22 | 2011-12-28 | 엘지이노텍 주식회사 | Two-step output controlled inductor-inductor-capacitor resonant converter |
| US20120020119A1 (en) * | 2010-07-20 | 2012-01-26 | Delta Electronics, Inc. | Ac-dc converter and control circuit thereof |
| CN102611312A (en) * | 2011-01-25 | 2012-07-25 | 李钟学 | Converter used for microwave oven |
-
2015
- 2015-04-03 CN CN201510157903.5A patent/CN104754790A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5250775A (en) * | 1991-03-20 | 1993-10-05 | Matsushita Electric Industrial Co., Ltd. | Electric cooking apparatus adapted for generating high power output containing a battery |
| CN1315736A (en) * | 2000-03-31 | 2001-10-03 | 三星电子株式会社 | Transformer |
| KR20110138997A (en) * | 2010-06-22 | 2011-12-28 | 엘지이노텍 주식회사 | Two-step output controlled inductor-inductor-capacitor resonant converter |
| US20120020119A1 (en) * | 2010-07-20 | 2012-01-26 | Delta Electronics, Inc. | Ac-dc converter and control circuit thereof |
| CN102611312A (en) * | 2011-01-25 | 2012-07-25 | 李钟学 | Converter used for microwave oven |
Non-Patent Citations (2)
| Title |
|---|
| 徐勤超，王春芳，李从洋: "LLC谐振式磁控管供电电源的研究", 《电力电子技术》 * |
| 徐德鸿等: "《现代电力电子学》", 31 May 2012, 机械工业出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767402A (en) * | 2015-04-17 | 2015-07-08 | 东华大学 | Inverter microwave oven power supply adopting multi-output bridge-type power converter |
| CN105429206A (en) * | 2015-11-25 | 2016-03-23 | 许继电源有限公司 | Combined power supply apparatus |
| CN106597940A (en) * | 2016-12-15 | 2017-04-26 | 合肥捷曼信息科技有限公司 | Data decoupling-based intelligent power source |
| CN107546999A (en) * | 2017-08-22 | 2018-01-05 | 浙江大学 | A kind of band active power decouples single-phase ZVT inverter circuit and its modulator approach |
| CN108601130A (en) * | 2018-05-20 | 2018-09-28 | 深圳戴普森新能源技术有限公司 | Magnetron power source circuit and control method, micro-wave oven |
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Application publication date: 20150701 |