CN106329947B - High-frequency and high-voltage power supply - Google Patents
High-frequency and high-voltage power supply Download PDFInfo
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- CN106329947B CN106329947B CN201610782613.4A CN201610782613A CN106329947B CN 106329947 B CN106329947 B CN 106329947B CN 201610782613 A CN201610782613 A CN 201610782613A CN 106329947 B CN106329947 B CN 106329947B
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- 230000003750 conditioning effect Effects 0.000 claims abstract description 26
- 239000003990 capacitor Substances 0.000 claims description 18
- 238000004804 winding Methods 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC
- H02M5/42—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters
- H02M5/44—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC
- H02M5/453—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/0074—Plural converter units whose inputs are connected in series
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Inverter Devices (AREA)
Abstract
The high-frequency and high-voltage power supply that the embodiment of the present invention proposes, belong to and main circuit, high-frequency step-up transformer, single-phase rectification bridge, controller module, two commutation driver circuits, two inverse changing driving circuits, inlet wire current mutual inductor, inlet wire current conditioning circuit, secondary voltage current acquisition conditioning circuit occurs for electrical domain, including inlet wire filter circuit, two high-frequency inversions.The leakage inductance of high-frequency step-up transformer is reduced in the case where output voltage is certain by using the input voltage that the mode that main circuit series connection occurs for two high-frequency inversions improves high-frequency step-up transformer；One group of three-phase full-controlled rectifier bridge is used respectively using in every group of high-frequency inversion generation main circuit simultaneously, the busbar voltage respectively exported can be flexibly adjusted in real time, and then adjust the primary voltage of high-frequency step-up transformer, finally allow power supply volume to combine choosing for voltage and frequency whole, improves the switching frequency of power supply.
Description
Technical field
The invention belongs to for electrical domain, in particular to high-frequency and high-voltage power supply.
Background technique
The fast development of power electronic devices and electromagnetically material brings high-frequency and high-voltage power supply and brings new vitality,
The fields such as electric power, building, the energy using more and more extensive, for the high-frequency high-voltage using series parallel resonance as working method
The switching frequency in source, all-controlling power electronics device must be less than 1/2 resonance frequency, then such high-frequency and high-voltage power supply is influenced by leakage inductance
It is larger.On the one hand due to voltage height, the factors such as insulation need to be considered, so that leakage inductance increases；On the other hand to improve frequency then needs to subtract
Small leakage inductance, then frequency and voltage become a pair of contradictory body, can not both adequate solutions contradiction.
Summary of the invention
In order to solve shortcoming and defect existing in the prior art, the present invention provides for neutralizing frequency and electricity in power supply
Contradictory high voltagehigh frequency power supply between pressure.
In order to reach above-mentioned technical purpose, the present invention provides high-frequency and high-voltage power supply, the power supply includes inlet wire filtered electrical
Road, high-frequency step-up transformer, one-way commutation bridge, controller module, the first commutation driver circuit, the first inverse changing driving circuit,
Two commutation driver circuits, the second inverse changing driving circuit, inlet wire current mutual inductor, inlet wire current conditioning circuit, secondary voltage electric current
Acquisition and conditioning circuit；
Further include:
Main circuit occurs for the first high-frequency inversion, and it includes the one or three to be linked in sequence that main circuit, which occurs, for first high-frequency inversion
Phase full-controlled rectifier bridge, the first DC capacitor, the first individual event inverter bridge, the first resonant capacitance, and it is located at high-frequency step-up transformer
In primary coil M；
Main circuit occurs for the second high-frequency inversion, and it includes the two or three to be linked in sequence that main circuit, which occurs, for second high-frequency inversion
Phase full-controlled rectifier bridge, the second DC capacitor, the second individual event inverter bridge, the second resonant capacitance and it is located at the high frequency transformer
In primary coil N.
Optionally, the input terminal of the inlet wire filter circuit connects three-phase incoming power；
Successively via first high-frequency inversion main circuit, the height occur for the first output end of the inlet wire filter circuit
It is connected after the secondary windings of frequency step-up transformer, the one-way commutation bridge with load；
Successively via second high-frequency inversion main circuit, the height occur for the second output terminal of the inlet wire filter circuit
It is connected after the secondary windings of frequency step-up transformer, the one-way commutation bridge with load.
Optionally, the inlet wire filter circuit includes three-phase reactor and three filters.
Optionally, first DC capacitor and second DC capacitor are connected in series, the primary coil M with it is described
Primary coil N is connected in series.
Optionally, the controller module exports silicon controlled trigger signal, and the silicon controlled trigger signal is successively via institute
State the first commutation driver circuit, second commutation driver circuit amplifies, amplified signal is respectively used to described in driving
First unidirectional inverter bridge, the second unidirectional inverter bridge.
Optionally, the controller module exports IGBT trigger signal, and the IGBT trigger signal is successively via the institute
First inverse changing driving circuit, second inverse changing driving circuit amplify, and amplified signal is respectively used to drive described
One half-bridge converter, second half-bridge converter.
Optionally, the collected current signal of inlet wire current mutual inductor is exported via the inlet wire current conditioning circuit
To the controller module；
The secondary voltage current acquisition conditioning circuit will be described in the secondary voltage current signal output valve after acquisition conditioning
Controller module.
Technical solution provided by the invention has the benefit that
The input that the mode that main circuit is connected in series improves high-frequency step-up transformer occurs by using two high-frequency inversions
Voltage reduces the leakage inductance of high-frequency step-up transformer in the case where output voltage is certain；Simultaneously using in every group of high-frequency inversion
Occur to use one group of three-phase full-controlled rectifier bridge in main circuit respectively, can flexibly adjust the busbar voltage respectively exported in real time, into
And the primary voltage of high-frequency step-up transformer is adjusted, finally allow power supply volume to combine choosing for voltage and frequency whole, mentions
The high switching frequency of power supply.
Detailed description of the invention
It, below will be to attached drawing needed in embodiment description in order to illustrate more clearly of technical solution of the present invention
It is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of high-frequency and high-voltage power supply provided by the invention；
Figure legends:
1- inlet wire filter capacitor, the first three-phase full-controlled rectifier bridge of 2-, the first DC capacitor of 3- the first unidirectional inverter bridge of 4-, 5-
First resonant capacitance, 6- high-frequency step-up transformer, the second three-phase full-controlled rectifier bridge of 7-, the second DC capacitor of 8-, 9- second are single-phase
Inverter bridge, the second resonant capacitance of 10-, 11- single-phase rectification bridge, 12- controller module, the first commutation driver circuit of 13-, 14-
One inverse changing driving circuit, the second commutation driver circuit of 15-, the second inverse changing driving circuit of 16-, 17- inlet wire current mutual inductor, 18-
Inlet wire current conditioning circuit, 19- secondary voltage current acquisition conditioning circuit.
Specific embodiment
To keep structure and advantage of the invention clearer, structure of the invention is made further below in conjunction with attached drawing
Description.
Embodiment one
The present invention provides high-frequency and high-voltage power supply, the power supply includes inlet wire filter circuit, high-frequency step-up transformer, unidirectional
Rectifier bridge, controller module, the first commutation driver circuit, the first inverse changing driving circuit, the second commutation driver circuit, the second inversion
Driving circuit, inlet wire current mutual inductor, inlet wire current conditioning circuit, secondary voltage current acquisition conditioning circuit；
Further include:
Main circuit occurs for the first high-frequency inversion, and it includes the one or three to be linked in sequence that main circuit, which occurs, for first high-frequency inversion
Phase full-controlled rectifier bridge, the first DC capacitor, the first individual event inverter bridge, the first resonant capacitance, and it is located at high-frequency step-up transformer
In primary coil M；
Main circuit occurs for the second high-frequency inversion, and it includes the two or three to be linked in sequence that main circuit, which occurs, for second high-frequency inversion
Phase full-controlled rectifier bridge, the second DC capacitor, the second individual event inverter bridge, the second resonant capacitance and it is located at the high frequency transformer
In primary coil N；
In an implementation, in order to solve the contradiction in existing power supply between frequency and voltage, the present invention provides a kind of high frequencies
High voltage power supply is shown in Fig. 1, which includes inlet wire filter circuit (1), the first high-frequency inversion generation main circuit, the second high-frequency inversion
Main circuit, high-frequency step-up transformer (6), single-phase rectification bridge (11), controller module (12), the first commutation driver circuit occurs
(13), the first inverse changing driving circuit (14), the second commutation driver circuit (15), the second inverse changing driving circuit (16), inlet wire current
Mutual inductor (17), inlet wire current conditioning circuit (18), secondary voltage current acquisition conditioning circuit (19)；First high-frequency inversion
It includes the first three-phase full-controlled rectifier bridge (2) being linked in sequence, the first DC capacitor (3), the first half-bridge converter that main circuit, which occurs,
(4), the primary coil M of the first resonant capacitance (5), high-frequency step-up transformer (6), the primary coil M is by two bridging coils
Composition；It includes the second three-phase full-controlled rectifier bridge (7) being linked in sequence, the second direct current that main circuit, which occurs, for second high-frequency inversion
Hold (8), the second half-bridge converter (9), the second resonant capacitance (10), high-frequency step-up transformer (6) primary coil N, the primary
Coil N is made of two bridging coils.
In this high-frequency and high-voltage power supply, occur to improve high frequency liter by the way of main circuit is connected in series using two high-frequency inversions
The input voltage of pressure transformer reduces the leakage inductance of high-frequency step-up transformer in the case where output voltage is certain；It uses simultaneously
Occur to use one group of three-phase full-controlled rectifier bridge in main circuit respectively in every group of high-frequency inversion, can flexibly adjust respective output in real time
Busbar voltage, and then adjust high-frequency step-up transformer primary voltage, finally allow power supply volume combine voltage and
Choosing for frequency is whole, improves the switching frequency of power supply.
Optionally, the input terminal of the inlet wire filter circuit connects three-phase incoming power；
Successively via first high-frequency inversion main circuit, the height occur for the first output end of the inlet wire filter circuit
It is connected after the secondary windings of frequency step-up transformer, the one-way commutation bridge with load；
Successively via second high-frequency inversion main circuit, the height occur for the second output terminal of the inlet wire filter circuit
It is connected after the secondary windings of frequency step-up transformer, the one-way commutation bridge with load.
In an implementation, for three-phase incoming power by being divided into two groups after the inlet wire filter circuit (1), one group is successively passed through institute
The first high-frequency inversion generation main circuit, the high-frequency step-up transformer (6) secondary windings, the single-phase rectification bridge (11) is stated to be followed by
To load；Another group successively by second high-frequency inversion occur main circuit, the high-frequency step-up transformer (6) it is secondary around
Group, the single-phase rectification bridge (11) are followed by load.
The inlet wire filter circuit (1) is made of a three-phase reactor and a Three-phase electric-wave filter.
Optionally, first DC capacitor and second DC capacitor are connected in series, the primary coil M with it is described
Primary coil N is connected in series.
In an implementation, the first DC capacitor (3) and second DC capacitor (8) are connected in series；The high frequency boosting becomes
The primary coil m and the high-frequency step-up transformer (6) primary coil n of depressor (6) are connected in series.
Optionally, the controller module exports silicon controlled trigger signal, and the silicon controlled trigger signal is successively via institute
State the first commutation driver circuit, second commutation driver circuit amplifies, amplified signal is respectively used to described in driving
First unidirectional inverter bridge, the second unidirectional inverter bridge.
In an implementation, the silicon controlled trigger signal of controller module (12) output is through first commutation driver circuit
(13), after second commutation driver circuit (15) amplification, first three-phase full-controlled rectifier bridge (2), described the are respectively driven
Two three-phase full-controlled rectifier bridges (7).
Optionally, the controller module exports IGBT trigger signal, and the IGBT trigger signal is successively via the institute
First inverse changing driving circuit, second inverse changing driving circuit amplify, and amplified signal is respectively used to drive described
One half-bridge converter, second half-bridge converter.
In an implementation, the IGBT trigger signal of controller module (12) output is through first inverse changing driving circuit
(14), after the second inverse changing driving circuit (16) amplification, first half-bridge converter (4), second list are respectively driven
Phase inverter bridge (9).Here IGBT is insulated gate bipolar transistor (Insulated Gate Bipolar
Transistor)。
Optionally, the collected current signal of inlet wire current mutual inductor is exported via the inlet wire current conditioning circuit
To the controller module；
The secondary voltage current acquisition conditioning circuit will be described in the secondary voltage current signal output valve after acquisition conditioning
Controller module.
In an implementation, the collected current signal of the inlet wire current mutual inductor (17) is through the inlet wire current conditioning circuit
(18) after, output to the controller module (12)；The secondary voltage current acquisition conditioning circuit (19) will be after acquisition conditioning
Secondary voltage current signal export to the controller module (12).
Main electricity occurs for the high-frequency and high-voltage power supply that the embodiment of the present invention proposes, including inlet wire filter circuit, two high-frequency inversions
Road, high-frequency step-up transformer, single-phase rectification bridge, dsp controller module, two commutation driver circuits, two inverse changing driving circuits,
Inlet wire current mutual inductor, inlet wire current conditioning circuit, secondary voltage current acquisition conditioning circuit.It is sent out by using two high-frequency inversions
The mode that raw main circuit is connected in series improves the input voltage of high-frequency step-up transformer, in the case where output voltage is certain,
Reduce the leakage inductance of high-frequency step-up transformer；One group of three-phase is used respectively using in every group of high-frequency inversion generation main circuit simultaneously
Full-controlled rectifier bridge can flexibly adjust the busbar voltage respectively exported in real time, and then adjust the inlet wire electricity of high-frequency step-up transformer
Pressure finally allows power supply volume to combine choosing for voltage and frequency whole, improves the switching frequency of power supply.
Each serial number in above-described embodiment is for illustration only, the assembling for not representing each component or the elder generation in use process
Sequence afterwards.
The above description is only an embodiment of the present invention, is not intended to limit the invention, all in the spirit and principles in the present invention
Within, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (6)
1. high-frequency and high-voltage power supply, which is characterized in that the power supply includes inlet wire filter circuit, high-frequency step-up transformer, single-phase whole
Flow bridge, controller module, the first commutation driver circuit, the first inverse changing driving circuit, the second commutation driver circuit, the second inversion drive
Dynamic circuit, inlet wire current mutual inductor, inlet wire current conditioning circuit, secondary voltage current acquisition conditioning circuit；
Further include:
Main circuit occurs for the first high-frequency inversion, and the first high-frequency inversion generation main circuit includes that the first three-phase of sequential connection is complete
Rectifier bridge, the first DC capacitor, the first half-bridge converter, the first resonant capacitance are controlled, and is located in high-frequency step-up transformer
Primary coil M；
Main circuit occurs for the second high-frequency inversion, and the second high-frequency inversion generation main circuit includes that the second three-phase of sequential connection is complete
It controls rectifier bridge, the second DC capacitor, the second half-bridge converter, the second resonant capacitance and is located in the high frequency transformer
Primary coil N；
First DC capacitor and second DC capacitor are connected in series, and the primary coil M and the primary coil N go here and there
Connection connection.
2. high-frequency and high-voltage power supply according to claim 1, it is characterised in that:
The input terminal of the inlet wire filter circuit connects three-phase incoming power；
Successively via first high-frequency inversion main circuit, the high frequency liter occur for the first output end of the inlet wire filter circuit
It is connected after the secondary windings of pressure transformer, the single-phase rectification bridge with load；
Successively via second high-frequency inversion main circuit, the high frequency liter occur for the second output terminal of the inlet wire filter circuit
It is connected after the secondary windings of pressure transformer, the single-phase rectification bridge with load.
3. high-frequency and high-voltage power supply according to claim 1, which is characterized in that the inlet wire filter circuit includes three-phase reactor
Device and Three-phase electric-wave filter.
4. high-frequency and high-voltage power supply according to claim 1, which is characterized in that the controller module exports control machines
Signal, the silicon controlled trigger signal are carried out via first commutation driver circuit, second commutation driver circuit respectively
Amplification, amplified signal are respectively used to drive first half-bridge converter, second half-bridge converter.
5. high-frequency and high-voltage power supply according to claim 1, which is characterized in that the controller module output IGBT triggering letter
Number, the IGBT trigger signal is amplified via first inverse changing driving circuit, second inverse changing driving circuit respectively,
Amplified signal is respectively used to drive first half-bridge converter, second half-bridge converter.
6. high-frequency and high-voltage power supply according to claim 1, it is characterised in that:
The collected current signal of inlet wire current mutual inductor is exported via the inlet wire current conditioning circuit to the control
Device module；
The secondary voltage current acquisition conditioning circuit exports the secondary voltage current signal after acquisition conditioning to the control
Device module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610782613.4A CN106329947B (en) | 2016-08-30 | 2016-08-30 | High-frequency and high-voltage power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610782613.4A CN106329947B (en) | 2016-08-30 | 2016-08-30 | High-frequency and high-voltage power supply |
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| CN106329947A CN106329947A (en) | 2017-01-11 |
| CN106329947B true CN106329947B (en) | 2019-06-18 |
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| CN107124114A (en) * | 2017-07-11 | 2017-09-01 | 江苏容天机电科技有限公司 | A kind of high-power high voltage high frequency electric source |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203039604U (en) * | 2012-12-31 | 2013-07-03 | 江苏一同环保工程技术有限公司 | High-power high-frequency high-voltage series-connection superposed high-voltage power supply |
| CN104578345A (en) * | 2015-01-23 | 2015-04-29 | 山东大学 | Electromagnetic resonance type wireless charging device and control method based on CLL resonant transformation |
| CN204465374U (en) * | 2015-03-18 | 2015-07-08 | 深圳市保益新能电气有限公司 | A kind of high-frequency isolation ac-dc conversion circuit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5914989B2 (en) * | 2011-05-30 | 2016-05-11 | サンケン電気株式会社 | Switching power supply |
| CN102281007B (en) * | 2011-08-30 | 2014-01-08 | 刘闯 | Multi-transformer switch power supply with cascaded output |
| CN102832828B (en) * | 2012-08-28 | 2015-04-15 | 南京航空航天大学 | Magnetic combined three-phase input AC (Alternating Current)/DC (Direct Current) full-bridge high frequency converter |
| CN203526771U (en) * | 2013-10-31 | 2014-04-09 | 成都焊研威达科技股份有限公司 | Inverse alternating-current waveform control circuit for use in submerged arc welding |
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2016
- 2016-08-30 CN CN201610782613.4A patent/CN106329947B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203039604U (en) * | 2012-12-31 | 2013-07-03 | 江苏一同环保工程技术有限公司 | High-power high-frequency high-voltage series-connection superposed high-voltage power supply |
| CN104578345A (en) * | 2015-01-23 | 2015-04-29 | 山东大学 | Electromagnetic resonance type wireless charging device and control method based on CLL resonant transformation |
| CN204465374U (en) * | 2015-03-18 | 2015-07-08 | 深圳市保益新能电气有限公司 | A kind of high-frequency isolation ac-dc conversion circuit |
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