CN206302344U - Frequency converter and micro-wave oven - Google Patents
Frequency converter and micro-wave oven Download PDFInfo
- Publication number
- CN206302344U CN206302344U CN201621470707.XU CN201621470707U CN206302344U CN 206302344 U CN206302344 U CN 206302344U CN 201621470707 U CN201621470707 U CN 201621470707U CN 206302344 U CN206302344 U CN 206302344U
- Authority
- CN
- China
- Prior art keywords
- frequency converter
- skeleton
- unit
- coiling
- magnetic core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The utility model discloses a kind of frequency converter and micro-wave oven, frequency converter includes inverse switch unit, step-up transformer and voltage multiplying rectifier unit, inverse switch unit includes switching tube, resonant capacitance and resonant inductance, resonant capacitance is connected between switching tube and resonant inductance, step-up transformer includes primary coiling and secondary rolling thread, one end of primary coiling connects one end of resonant capacitance by resonant inductance, the other end of primary coiling connects the other end and switching tube of resonant capacitance, and secondary rolling thread is connected with voltage multiplying rectifier unit.In the frequency converter of the utility model implementation method, increased inverse switch unit, so that resonant inductance can be provided separately with step-up transformer, so resonant inductance does not influence the magnetic coupling between primary coiling and secondary rolling thread, and then the energy transmission efficiency of step-up transformer can be improved with the magnetic coupling ability of secondary rolling thread by strengthening primary coiling, so as to lift the overall efficiency of frequency converter and ensure the reliability of frequency converter work.
Description
Technical field
The utility model is related to household appliance technical field, more particularly, to a kind of frequency converter and micro-wave oven.
Background technology
In the related art, the step-up transformer of the frequency converter of micro-wave oven is in order to be met the leakage inductance of requirement for resonance
With, then the magnetic coupling between the primary and secondary winding of step-up transformer must be reduced, can so cause the energy transmission efficiency of transformer
Reduce, while can cause that the overall temperature rise of frequency converter is higher, can so reduce the reliability of frequency converter work, and frequency conversion can be influenceed
The service life of device.
Utility model content
The utility model is intended at least solve one of technical problem present in correlation technique.Therefore, the utility model is needed
A kind of frequency converter and micro-wave oven are provided.
The frequency converter of the utility model implementation method is used for micro-wave oven, and the frequency converter includes inverse switch unit, boosting
Transformer and voltage multiplying rectifier unit, the inverse switch unit include switching tube, resonant capacitance and resonant inductance, the resonance electricity
Appearance is connected between switching tube and the resonant inductance, and the step-up transformer includes primary coiling and secondary rolling thread, described first
One end of level coiling connects one end of the resonant capacitance, the other end connection institute of the primary coiling by the resonant inductance
The other end and the switching tube of resonant capacitance are stated, the secondary rolling thread is connected with the voltage multiplying rectifier unit.
In the frequency converter of the utility model implementation method, inverse switch unit is increased so that resonant inductance can be with boosting
Transformer is provided separately, and such resonant inductance does not influence the magnetic coupling between primary coiling and secondary rolling thread, and then can be by adding
The coiling of strong primary improves the energy transmission efficiency of step-up transformer with the magnetic coupling ability of secondary rolling thread, so as to lift frequency converter
Overall efficiency and ensure frequency converter work reliability.
In one embodiment, the step-up transformer includes core assembly, the first skeleton and the second skeleton, described the
One skeleton and second skeleton be it is hollow, the primary coiling around being located on first skeleton, the secondary rolling thread around
It is located on second skeleton, second skeleton and the secondary rolling thread are arranged in first skeleton, the magnetic core group
Part includes the first magnetic core and the second magnetic core, and first magnetic core includes the first post, and second magnetic core includes the second post, described the
One post and second post are located in second skeleton and are spaced relative.
In one embodiment, first skeleton includes two the first back-up rings of annular and connection described two first
First support body of back-up ring, around being located on first support body, second skeleton includes the of two annulars for the primary coiling
Two back-up rings and the second support body of described two second back-up rings is connected, the secondary rolling thread is around being located on second support body.
In one embodiment, first support body and second support body be in hollow cylindric, and described first
Skeleton and second skeleton are arranged concentrically, the equal length of the length of first skeleton and second skeleton.
In one embodiment, the edge of first back-up ring has the first breach, the edge of second back-up ring
The second breach is offered, the primary coiling wears first breach, and the secondary rolling thread wears second breach.
In one embodiment, first magnetic core is U-shaped, and second magnetic core is U-shaped.
In one embodiment, the resonant inductance include annular magnetic core and uniformly around be located on the magnetic core around
Line, the coiling is accessed in the circuit of the frequency converter.
In one embodiment, the frequency converter include rectification unit and inversion control unit, the rectification unit with
The inverse switch unit is in parallel, and the rectification unit is used for convert alternating current into direct current, the inversion control unit with
The inverse switch unit is in parallel and is used to control the break-make of the switching tube.
In one embodiment, the frequency converter includes filter unit, and the filter unit connects the rectification unit
And the inversion control unit.
The micro-wave oven of the utility model implementation method includes magnetron and the frequency converter as described in above-mentioned any embodiment,
The voltage multiplying rectifier unit connects the magnetron.
In the micro-wave oven of the utility model implementation method, inverse switch unit is increased so that resonant inductance can be with boosting
Transformer is provided separately, and such resonant inductance does not influence the magnetic coupling between primary coiling and secondary rolling thread, and then can be by adding
The coiling of strong primary improves the energy transmission efficiency of step-up transformer with the magnetic coupling ability of secondary rolling thread, so as to lift frequency converter
Overall efficiency and ensure frequency converter work reliability.
The additional aspect and advantage of the utility model implementation method will be set forth in part in the description, partly will be under
Become obvious in the description in face, or recognized by practice of the present utility model.
Brief description of the drawings
Of the present utility model above-mentioned and/or additional aspect and advantage are from description of the accompanying drawings below to implementation method is combined
Will be apparent and be readily appreciated that, wherein：
Fig. 1 is the circuit diagram of the micro-wave oven of the utility model implementation method.
Fig. 2 is the schematic perspective view of the step-up transformer of the frequency converter of the micro-wave oven of the utility model implementation method.
Fig. 3 is the decomposing schematic representation of the step-up transformer of the frequency converter of the micro-wave oven of the utility model implementation method.
Fig. 4 is first skeleton and the second bone of the step-up transformer of the frequency converter of the micro-wave oven of the utility model implementation method
The schematic perspective view of frame.
Fig. 5 is the floor map of the resonant inductance of the frequency converter of the micro-wave oven of the utility model implementation method.
Main element symbol description：
Micro-wave oven 100；
Frequency converter 10, inverse switch unit 11, switching tube 111, resonant capacitance 112, resonant inductance 113, magnetic core 114, around
Line 115, step-up transformer 12, primary coiling 121, secondary rolling thread 122, core assembly 123, the first magnetic core 1231, the second magnetic core
1232nd, the first post 1233, the second post 1234, the first skeleton 124, the first back-up ring 1241, the first support body 1242, the first breach
1243rd, the second skeleton 125, the second back-up ring 1251, the second support body 1252, the second breach 1253, voltage multiplying rectifier unit 13, rectification list
Unit 14, inversion control unit 15, filter unit 16, inductor 161, capacitor 162, AC power 17；
Magnetron 20.
Specific embodiment
Implementation method of the present utility model is described below in detail, the example of the implementation method is shown in the drawings, wherein
Same or similar label represents same or similar element or the element with same or like function from start to finish.Lead to below
It is exemplary to cross the implementation method being described with reference to the drawings, and is only used for explaining the utility model, and it is not intended that to this practicality
New limitation.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward ",
The orientation or position relationship of the instructions such as " clockwise ", " counterclockwise " be based on orientation shown in the drawings or position relationship, be only for
Be easy to description the utility model and simplify describe, rather than indicate imply signified device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.Additionally, term " first ",
" second " is only used for describing purpose, and it is not intended that indicating or implying relative importance or imply to indicate indicated technology
The quantity of feature.Thus, " first " is defined, the feature of " second " can be expressed or implicitly include one or more
The feature.In description of the present utility model, " multiple " is meant that two or more, unless otherwise clearly specific
Limit.
, it is necessary to explanation, unless otherwise clearly defined and limited, term " is pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integratedly
Connection.Can mechanically connect, or electrically connect.Can be joined directly together, it is also possible to be indirectly connected to by intermediary,
Can be two element internals connection or two interaction relationships of element.For one of ordinary skill in the art
Speech, can as the case may be understand concrete meaning of the above-mentioned term in the utility model.
Also referring to Fig. 1~Fig. 5, the frequency converter 10 of the utility model implementation method is used for micro-wave oven 100, frequency converter 10
Including inverse switch unit 11, step-up transformer 12 and voltage multiplying rectifier unit 13.Inverse switch unit 11 include switching tube 111,
Resonant capacitance 112 and resonant inductance 113.Resonant capacitance 112 is connected between switching tube 111 and resonant inductance 113.Boosting transformation
Device 12 includes primary coiling 121 and secondary rolling thread 122.One end of primary coiling 121 connects resonant capacitance by resonant inductance 113
112 one end, the other end of primary coiling 121 connects the other end and switching tube 111 of resonant capacitance 112.Secondary rolling thread 121 with
Voltage multiplying rectifier unit 13 is connected.
In the frequency converter 10 of the utility model implementation method, inverse switch unit 11 is increased so that resonant inductance 112 can
It is provided separately with step-up transformer 12, such resonant inductance 112 does not influence the magnetic between primary coiling 121 and secondary rolling thread 122
Coupling, and then the energy of step-up transformer 12 can be improved with the magnetic coupling ability of secondary rolling thread 122 by strengthening primary coiling 121
Amount efficiency of transmission, so as to lift the overall efficiency of frequency converter 10 and ensure the reliability of the work of frequency converter 10.
It should be noted that because resonant inductance 112 can be provided separately with step-up transformer 12, so in the work of frequency converter 10
When making, because leakage inductance value is excessive the overall temperature rise of frequency converter 10 will not be caused higher, so reduce frequency converter 10 simultaneously
Overall temperature rise, so as to the security that frequency converter 10 is used can be ensured.Certainly, resonant inductance 112 separately sets with step-up transformer 12
The mode put simplifies the connection between resonant inductance 112 and step-up transformer 12 to a certain extent, so to a certain degree
On can reduce the manufacturing cost of frequency converter 10.
In one embodiment, step-up transformer 12 includes core assembly 123, the first skeleton 124 and the second skeleton
125.First skeleton 124 and the second skeleton 125 are hollow.Primary coiling 121 is around being located on the first skeleton 124.Secondary rolling thread
122 around being located on the second skeleton 125.Second skeleton 125 and secondary rolling thread 122 are arranged in the first skeleton 124.Core assembly
123 include the first magnetic core 1231 and the second magnetic core 1232.First magnetic core 1231 includes the first post 1233.Second magnetic core 1232 includes
Second post 1234.First post 1233 and the second post 1234 are located in the second skeleton 125 and are spaced relative.In this way, primary coiling
Magnetic coupling ability between 121 and secondary rolling thread 122 is stronger, at the same the first skeleton 124 can separate primary coiling 121 and secondary around
Line 122, can so be prevented effectively from primary coiling 121 and secondary rolling thread 122 influences each other, while the first magnetic core 1231 and the second magnetic
Core 1232 can be to be detachably connected, and so be easy to the assembling and dismounting of core assembly 123.
In one embodiment, the first skeleton 124 includes two the first back-up rings 1241 of annular and connects two first
First support body 1242 of back-up ring 1241.Primary coiling 122 is around being located on first body 1242.Second skeleton 125 includes two rings
Two second support bodys 1252 of the second back-up ring 1251 of second back-up ring 1251 and connection of shape.Secondary rolling thread 122 is around being located at the second frame
On body 1252.
In this way, the back-up ring of annular has certain defencive function to coiling, and support body has protection to coiling and props up simultaneously
The effect of support.
In one embodiment, the first support body 1242 and the second support body 1252 are in hollow cylindric.First skeleton
124 and second skeleton 125 be arranged concentrically.The equal length of the length of the first skeleton 124 and the second skeleton 125.
In this way, coiling can be uniformly around being located on corresponding support body, while two skeletons are arranged concentrically and can ensure primary
There is stronger magnetic coupling ability between coiling 121 and secondary rolling thread 122.
In one embodiment, the edge of the first back-up ring 1241 has the first breach 1243.Second back-up ring 1251
Edge has the second breach 1253.Primary coiling 121 wears the first breach 1243.Secondary rolling thread 121 wears the second breach
1253。
In this way, coiling can wear breach and is connected with the circuit realiration of frequency converter 10.
In one embodiment, the first magnetic core 1231 is U-shaped, and the second magnetic core 1232 is U-shaped.
In this way, the distributed constant uniformity of magnetic core is preferably, and with preferable radiating effect.
In one embodiment, resonant inductance 112 includes the magnetic core 114 of annular and uniformly around being located on magnetic core 114
Coiling 115.Coiling 115 is accessed in the circuit of frequency converter 10.
In this way, the scattered magnetic flux of resonant inductance 112 is less, will not be because of surrounding's device of scattered magnetic flux interference to resonant inductance 112
The normal work of part, at the same resonant inductance 112 inductance value stabilization because caused by technique resonant inductance 112 batch one
The possibility of cause property difference is smaller.
In one embodiment, frequency converter 10 includes rectification unit 14 and inversion control unit 15.Rectification unit 14 with
Inverse switch unit 11 is in parallel.Rectification unit 14 is used for convert alternating current into direct current.Inversion control unit 15 is opened with inversion
Close the parallel connection of unit 15 and for the break-make of controlling switch pipe 111.
In this way, inversion control unit 15 can ensure the stability of inverse switch unit 11, and then can effectively ensure that switching tube
111 switching loss is approximately zero.
In the utility model example, rectification unit 14 is connected with AC power 17, and rectification unit 14 is used for alternating current
The convert alternating current in source 17 is into direct current.In one example, rectification unit 14 may include rectifier bridge.
In one embodiment, frequency converter 10 includes filter unit 16.Filter unit 16 connects rectification unit 14 and inverse
Become control unit 15.
In this way, the interference of specific band frequency can effectively be suppressed and be prevented.
Specifically, filter unit 16 includes inductor 161 and capacitor 162, and inductor 161 is in parallel with capacitor 162.
The micro-wave oven 100 of the utility model implementation method includes magnetron 20 and the frequency converter such as above-mentioned any embodiment
10.Voltage multiplying rectifier unit 13 connects magnetron 20.
In the micro-wave oven 100 of the utility model implementation method, inverse switch unit 11 is increased so that resonant inductance 112
Can be provided separately with step-up transformer 12, such resonant inductance 112 is not influenceed between primary coiling 121 and secondary rolling thread 122
Magnetic coupling, and then step-up transformer 12 can be improved with the magnetic coupling ability of secondary rolling thread 122 by strengthening primary coiling 121
Energy transmission efficiency, so as to lift the overall efficiency of frequency converter 10 and ensure the reliability of the work of frequency converter 10.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it
D score can include the first and second feature directly contacts, it is also possible to including the first and second features not be directly contact but logical
The other characterisation contact crossed between them.And, fisrt feature second feature " on ", " top " and " above " include the
One feature is directly over second feature and oblique upper, or is merely representative of fisrt feature level height higher than second feature.First is special
Levy second feature " under ", " lower section " and " below " include fisrt feature immediately below second feature and obliquely downward, or only
Represent that fisrt feature level height is less than second feature.
Following disclosure provides many different implementation methods or example is used for realizing different structure of the present utility model.
In order to simplify disclosure of the present utility model, hereinafter the part and setting to specific examples are described.Certainly, they are only
Example, and purpose does not lie in limitation the utility model.Additionally, the utility model can in different examples repeat reference numerals
And/or reference letter, this repetition is for purposes of simplicity and clarity, discussed various implementation methods itself not to be indicated
And/or the relation between setting.Additionally, the example of the various specific technique that provides of the utility model and material, but this
Field those of ordinary skill can be appreciated that the application of other techniques and/or the use of other materials.
In the description of this specification, reference term " implementation method ", " some implementation methods ", " schematically implementation
It is specific that the description of mode ", " example ", " specific example " or " some examples " etc. means to combine implementation method or example is described
Feature, structure, material or feature are contained at least one implementation method of the present utility model or example.In this specification
In, the schematic representation to above-mentioned term is not necessarily referring to identical implementation method or example.And, the specific spy of description
Levy, structure, material or feature can in an appropriate manner be combined in one or more any implementation methods or example.
While there has been shown and described that implementation method of the present utility model, one of ordinary skill in the art can manage
Solution：These implementation methods can be carried out in the case where principle of the present utility model and objective is not departed from various changes, modification,
Replace and modification, scope of the present utility model is limited by claim and its equivalent.
Claims (10)
1. a kind of frequency converter, for micro-wave oven, it is characterised in that the frequency converter includes：
Inverse switch unit, the inverse switch unit includes switching tube, resonant capacitance and resonant inductance, and the resonant capacitance connects
It is connected between the switching tube and the resonant inductance；
Step-up transformer, the step-up transformer includes primary coiling and secondary rolling thread, and one end of the primary coiling passes through institute
One end that resonant inductance connects the resonant capacitance is stated, the other end of the primary coiling connects the other end of the resonant capacitance
With the switching tube；
Voltage multiplying rectifier unit, the secondary rolling thread is connected with the voltage multiplying rectifier unit.
2. frequency converter as claimed in claim 1, it is characterised in that the step-up transformer includes core assembly, the first skeleton
With the second skeleton, first skeleton and second skeleton are hollow, and the primary coiling is around being located at first skeleton
On, around being located on second skeleton, second skeleton and the secondary rolling thread are arranged on described first to the secondary rolling thread
In skeleton, the core assembly includes the first magnetic core and the second magnetic core, and first magnetic core includes the first post, second magnetic core
Including the second post, first post and second post are located in second skeleton and are spaced relative.
3. frequency converter as claimed in claim 2, it is characterised in that first skeleton include the first back-up rings of two annulars and
Connect the first support body of described two first back-up rings, the primary coiling is around being located on first support body；
Second skeleton includes the second back-up ring of two annulars and connects the second support body of described two second back-up rings, described time
Level coiling is around being located on second support body.
4. frequency converter as claimed in claim 3, it is characterised in that first support body and second support body are in hollow
Cylindric, first skeleton and second skeleton are arranged concentrically, the length of first skeleton and second skeleton
Equal length.
5. frequency converter as claimed in claim 3, it is characterised in that the edge of first back-up ring has the first breach, institute
Stating the edge of the second back-up ring has the second breach, and the primary coiling wears first breach, and the secondary rolling thread wears
Second breach.
6. frequency converter as claimed in claim 2, it is characterised in that first magnetic core is U-shaped, and second magnetic core is U-shaped.
7. frequency converter as claimed in claim 1, it is characterised in that the resonant inductance includes the magnetic core of annular and uniform winding
Coiling on the magnetic core, the coiling is accessed in the circuit of the frequency converter.
8. frequency converter as claimed in claim 1, it is characterised in that the frequency converter includes rectification unit and inversion control list
Unit, the rectification unit is in parallel with the inverse switch unit, and the rectification unit is used for convert alternating current into direct current, institute
State inversion control unit in parallel with the inverse switch unit and for controlling the break-make of the switching tube.
9. frequency converter as claimed in claim 8, it is characterised in that the frequency converter includes filter unit, the filter unit
Connect the rectification unit and the inversion control unit.
10. a kind of micro-wave oven, it is characterised in that the frequency converter including magnetron and as described in claim any one of 1-9, it is described
Voltage multiplying rectifier unit connects the magnetron.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621470707.XU CN206302344U (en) | 2016-12-29 | 2016-12-29 | Frequency converter and micro-wave oven |
| JP2019542765A JP6821045B2 (en) | 2016-12-29 | 2017-07-26 | Inverter and microwave |
| PCT/CN2017/094544 WO2018120817A1 (en) | 2016-12-29 | 2017-07-26 | Frequency converter and microwave oven |
| KR1020197018999A KR20190086561A (en) | 2016-12-29 | 2017-07-26 | Frequency converter and microwave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621470707.XU CN206302344U (en) | 2016-12-29 | 2016-12-29 | Frequency converter and micro-wave oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206302344U true CN206302344U (en) | 2017-07-04 |
Family
ID=59205305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621470707.XU Active CN206302344U (en) | 2016-12-29 | 2016-12-29 | Frequency converter and micro-wave oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206302344U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533184A (en) * | 2016-12-29 | 2017-03-22 | 广东美的厨房电器制造有限公司 | Frequency converter and microwave oven |
| WO2018120817A1 (en) * | 2016-12-29 | 2018-07-05 | 广东美的厨房电器制造有限公司 | Frequency converter and microwave oven |
| CN110831272A (en) * | 2019-09-24 | 2020-02-21 | 广东美的白色家电技术创新中心有限公司 | Microwave oven |
-
2016
- 2016-12-29 CN CN201621470707.XU patent/CN206302344U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533184A (en) * | 2016-12-29 | 2017-03-22 | 广东美的厨房电器制造有限公司 | Frequency converter and microwave oven |
| WO2018120817A1 (en) * | 2016-12-29 | 2018-07-05 | 广东美的厨房电器制造有限公司 | Frequency converter and microwave oven |
| CN110831272A (en) * | 2019-09-24 | 2020-02-21 | 广东美的白色家电技术创新中心有限公司 | Microwave oven |
| WO2021056834A1 (en) * | 2019-09-24 | 2021-04-01 | 广东美的白色家电技术创新中心有限公司 | Microwave oven |
| EP3998840A4 (en) * | 2019-09-24 | 2022-10-12 | Guangdong Midea White Home Appliance Technology Innovation Center Co., Ltd. | Microwave oven |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101447743B (en) | Electric power converter and control method for the same | |
| CN206302344U (en) | Frequency converter and micro-wave oven | |
| CN101715256B (en) | Electromagnetic induction heating device | |
| JPWO2011089900A1 (en) | Induction heating device | |
| JP5474893B2 (en) | Inductor integrated transformer | |
| CN100429855C (en) | Power supply wave shape correcting filter | |
| CN102484931B (en) | Power drive circuit, lighting device comprising power drive circuit and operating method of lighting device | |
| CN104466969B (en) | A kind of LCL type wave filter based on three-winding transformer | |
| CN107770891B (en) | Magnetron heater control circuit, magnetron power supply circuit | |
| CN201616925U (en) | Magnet exciting coil of electromagnetic oven | |
| CN208478093U (en) | The transformer of winding construction | |
| CN106533184A (en) | Frequency converter and microwave oven | |
| CN109600048A (en) | Crisscross parallel LLC circuit | |
| TW438952B (en) | Microwave oven | |
| CN207573657U (en) | The resonant heating circuit of electromagnetic cooking appliance and with its electromagnetic cooking appliance | |
| CN104917390A (en) | Special switching transformer for computer | |
| CN206620320U (en) | Electromagnetic heating circuit and electromagnetic heating apparatus | |
| CN204315358U (en) | A kind of high-tension transformer | |
| CN101834063A (en) | Pulse drive transformer assembly for self-excited switching power supply converter | |
| CN107371287B (en) | Power supply circuit, electromagnetic heating circuit and electromagnetic heating equipment | |
| CN201387456Y (en) | High-efficiency electro-magnetic cooker energy-saving burning device | |
| Zhang et al. | The high order harmonic distortion phenomenon in the strongly coupled IPT system and Its reduction method | |
| CN205845688U (en) | A kind of economizing on energy and electricity switching mode power supply transformer | |
| CN202977128U (en) | Microwave oven and transformer thereof | |
| CN216216569U (en) | Inversion low-voltage isolation power supply with low-voltage output |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |