CN209516748U - A kind of output modulation circuit of wireless power transmission systems receiving side - Google Patents
A kind of output modulation circuit of wireless power transmission systems receiving side Download PDFInfo
- Publication number
- CN209516748U CN209516748U CN201920390880.6U CN201920390880U CN209516748U CN 209516748 U CN209516748 U CN 209516748U CN 201920390880 U CN201920390880 U CN 201920390880U CN 209516748 U CN209516748 U CN 209516748U
- Authority
- CN
- China
- Prior art keywords
- power transmission
- wireless power
- oxide
- semiconductor
- metal
- 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
Abstract
The utility model discloses a kind of output modulation circuits of wireless power transmission systems receiving side, including receiving the wireless power transmission receiving end series resonance chamber that end-coil and its series resonant capacitance are constituted by wireless power transmission, first rectifier diode, second rectifier diode, first metal-oxide-semiconductor, second metal-oxide-semiconductor, buffer capacitor, freewheeling diode, outputting inductance, output filter capacitor and load, the first metal-oxide-semiconductor and the work of the second metal-oxide-semiconductor are driven by phase shifting control, so that the output electric current and output voltage fundamental component of wireless power transmission receiving end series resonance chamber are the same as the same phase of frequency, improve the efficiency of transmission of wireless power transmission.Moreover, cascading this conventional wireless transmission system receiving side modulation circuit of DC-DC converter compared to uncontrollable rectifier, the output modulation circuit of the utility model is while realizing identical modulation function, it can be achieved that optimization in volume and cost.
Description
Technical field
The utility model relates to the technical field of wireless power transmission, a kind of wireless power transmission systems receiving side is referred in particular to
Export modulation circuit.
Background technique
Compared to traditional wired transmission of electricity, wireless power transmission technology realizes the electrical isolation of power supply and load to improve
Safety, the flexibility of electric energy transmission, therefore, the technology have obtained extensive concern and research in all parts of the world, and electric energy passes
Defeated power, efficiency are improved significantly, and can satisfy the application of different field, in mobile device, electric car, industrial machine
People, implantable medical device charging existing research and apply precedent.It is believed that in the near future, in certain applications, wirelessly
Transmission of electricity will replace traditional wired transmission of electricity.
Simple wireless power transmission systems are by DC power supply, high-frequency inverter, transmitting terminal compensation network, coupling coil, reception
End compensating network, HVDC Modulation device, loads this several parts composition at rectifier.In order to improve electric energy efficiency of transmission, increase transmission distance
From needing by being arranged that resonance compensation network makes transmitting terminal and receiving end works in same frequency resonant state, to generate sufficiently strong
Coupled magnetic field to realize the transmission of effective electric energy.2007, scholar's coupled mode theory researching and designing of the Massachusetts Institute of Technology
Magnet coupled resonant type wireless transmission system successfully 2m distance under give light bulb carry out radio energy-transmitting, thus caused about magnetic
The research boom of coupled resonance formula wireless power transmission.
And in order to meet the needs of different loads output, output modulation will be generally introduced, modulator approach is broadly divided into hair
Penetrate end modulation and receiving end modulation.Wherein transmitting terminal modulation need according to receive client information feedback come adjust inverter frequency or
Phase shift has scholar to feed back by the way of wireless communication to modulate output, but the mode wirelessly communicated undoubtedly will increase
The cost of system；There is scholar to feed back using the method for parameter On-line Estimation identification, but complicated algorithm may be related to,
It is more demanding to the operational capability of controller.And receiving end modulation mainly cascades a DC-DC after the rectifier of receiving end and becomes
Parallel operation is to modulate output, and this method is more easy to be direct, and output can be also exactly adjusted.However increase DC-DC
Converter can greatly increase the cost and volume of system especially with lifting press converter.Has scholar simply at present
Cascade DC-DC converter is eliminated using no bridge active rectification topology, but this technology modulation range is limited, cannot reach wireless
The modulation effect of power delivery circuit cascade buck-boost converter.
Utility model content
The shortcomings that the purpose of the utility model is to overcome the prior arts and insufficient proposes a kind of wireless power transmission systems and connects
The output modulation circuit and its metal-oxide-semiconductor control method of side are received, can be dropped by simplifying conventional wireless transmission of electricity cascade system structure
Low system cost reduces system bulk, and does not influence the efficient normal operation of wireless power transmission systems again.
To achieve the above object, technical solution provided by the utility model are as follows: a kind of wireless power transmission systems receiving side
Modulation circuit is exported, is connected including receiving the wireless power transmission receiving end that end-coil and its series resonant capacitance are constituted by wireless power transmission
Resonant cavity, the first rectifier diode, the second rectifier diode, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, buffering capacitor, freewheeling diode,
Outputting inductance, output filter capacitor and load；Wherein, one end of the wireless power transmission receiving end series resonance chamber is respectively with first
The connection of the cathode of the anode of rectifier diode and the second rectifier diode, the other end respectively with the source electrode of the first metal-oxide-semiconductor and the
The drain electrode of two metal-oxide-semiconductors connects；The cathode of first rectifier diode respectively with the drain electrode of the first metal-oxide-semiconductor and buffering capacitor just
Pole connection；The cathode of the buffering capacitor is connect with one end of the anode of freewheeling diode and outputting inductance respectively；The output
The other end of inductance and the cathode of output filter capacitor connect；The anode of second rectifier diode respectively with the second metal-oxide-semiconductor
Source electrode, freewheeling diode cathode and output filter capacitor anode connection；The load is parallel to output filter capacitor two
End.
The utility model compared with prior art, have the following advantages that with the utility model has the advantages that
1, compared to wireless power transmission systems receiving side can not control rectifying circuit cascade Cuk buck translation circuit scheme, this
Utility model can eliminate rectification output filter capacitor, Cuk input choke induction, two rectifier diodes, optimize cost and body
Product.
2, compared to simple using no bridge active rectification modulation scheme, the modulation range of the utility model circuit is bigger.
3, receiving end equivalent impedance is in resistive always can guarantee to the control of metal-oxide-semiconductor, therefore does not influence wireless power transmission systems
Normal operation.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model.
Fig. 2 is the metal-oxide-semiconductor drive control flow chart of the utility model.
Fig. 3 is the model analysis figure of utility model works.
Fig. 4 be the utility model output modulation circuit with 0.5 for duty ratio working waveform figure.
Specific embodiment
The utility model is described in further detail combined with specific embodiments below.
As shown in Figure 1, the output modulation circuit of wireless power transmission systems receiving side provided by the present embodiment, including by wireless
Transmission of electricity receives end-coil LsAnd its series resonant capacitance CsThe wireless power transmission receiving end series resonance chamber 1, first of composition rectifies two poles
Pipe D1, the second rectifier diode D2, the first metal-oxide-semiconductor S1, the second metal-oxide-semiconductor S2, buffering capacitor C1, sustained diode, outputting inductance
L2, output filter capacitor C2With load RL；One end of the wireless power transmission receiving end series resonance chamber 1 rectifies two with first respectively
Pole pipe D1Anode and the second rectifier diode D2Cathode connection, the other end respectively with the first metal-oxide-semiconductor S1Source electrode and second
Metal-oxide-semiconductor S2Drain electrode connection；The first rectifier diode D1Cathode respectively with the first metal-oxide-semiconductor S1Drain electrode and buffering capacitor
C1Anode connection；The buffering capacitor C1Cathode respectively with the anode of sustained diode and outputting inductance L2One end connect
It connects；The outputting inductance L2The other end and output filter capacitor C2Cathode connection；The second rectifier diode D2Anode
Respectively with the second metal-oxide-semiconductor S2Source electrode, sustained diode cathode and output filter capacitor C2Anode connection；The load RL
It is parallel to output filter capacitor C2Both ends.
The metal-oxide-semiconductor control method of the output modulation circuit of above-mentioned wireless power transmission systems receiving side, specifically: in wireless power transmission
Receiving end series resonance chamber exports electric current isAfter zero passage, triggering generates rectangular wave, which postpones a period of time tdAfterwards, simultaneously
Drive the first metal-oxide-semiconductor and the second metal-oxide-semiconductor.Square wave pulses width is α × T/2, and specific delay time are as follows:
Wherein, T is power cycle, and α is switching tube S1、S2Drive duty ratio.The control flow can be summarized as shown in Fig. 2
Block diagram.
Under above-mentioned control method, in a power cycle, there are six operation modes for output modulator, are respectively:
Mode 1: positive half cycle descending branch at receiving coil electric current, two metal-oxide-semiconductor S1、S2It is open-minded.Arrival current short circuit, buffering
Capacitor C1To load discharge.
Mode 2: negative half period ascent stage at receiving coil electric current, two metal-oxide-semiconductor S1、S2It is open-minded.Arrival current short circuit, buffering
Capacitor C1To load discharge.
Mode 3: negative half period peak segment at receiving coil electric current, two metal-oxide-semiconductor S1、S2Shutdown.Arrival current gives buffering capacitor
C1Charging, outputting inductance L2Electric current continues powering load through sustained diode afterflow.
Mode 4: negative half period descending branch at receiving coil electric current, two metal-oxide-semiconductor S1、S2It is open-minded, it is identical as mode 2.
Mode 5: positive half cycle ascent stage at receiving coil electric current, two metal-oxide-semiconductor S1、S2It is open-minded, it is identical as mode 1.
Mode 6: positive half cycle peak segment at receiving coil electric current, two metal-oxide-semiconductor S1、S2Shutdown.Arrival current gives buffering capacitor
C1Charging, outputting inductance L2Electric current continues powering load through sustained diode afterflow.
The equivalent circuit and current direction of each mode in receiving end are as shown in Figure 3.
When circuit works in the above-described state, wireless power transmission receiving end series resonance chamber output electric current and output can be made
The fundamental component of voltage obtains the equivalent output resistance R of the series resonance chamber with the same phase of frequencyeAre as follows:
And output size of current ideally are as follows:
Wherein, IsmElectric current i is exported for the wireless power transmission receiving end series resonance chambersPeak value.
Fig. 4 is to export the waveform diagram obtained when modulation circuit operative duty cycles are 0.5, wherein first subgraph is two
The drive waveforms of metal-oxide-semiconductor (S1, S2), second subgraph are wireless power transmission receiving end series resonance chamber output electric current isWaveform,
Third subgraph is wireless power transmission receiving end series resonance chamber output voltage vsWaveform, the 4th subgraph be output electric current iout
Waveform.As shown in Figure 4, the fundamental component of wireless power transmission receiving end series resonance chamber output electric current and output voltage is substantially same
Phase, output electric current is in steady DC current, therefore demonstrates the validity of the utility model.
Embodiment described above is only the preferred embodiment of the utility model, and the implementation of the utility model is not limited with this
Range, therefore all shapes according to the utility model, change made by principle, it should all cover within the protection scope of the present utility model.
Claims (1)
1. a kind of output modulation circuit of wireless power transmission systems receiving side, it is characterised in that: including receiving end line by wireless power transmission
Enclose (Ls) and its series resonant capacitance (Cs) constitute wireless power transmission receiving end series resonance chamber (1), the first rectifier diode
(D1), the second rectifier diode (D2), the first metal-oxide-semiconductor (S1), the second metal-oxide-semiconductor (S2), buffering capacitor (C1), freewheeling diode (D),
Outputting inductance (L2), output filter capacitor (C2) and load (RL)；Wherein, the wireless power transmission receiving end series resonance chamber (1)
One end respectively with the first rectifier diode (D1) anode and the second rectifier diode (D2) cathode connection, the other end difference
With the first metal-oxide-semiconductor (S1) source electrode and the second metal-oxide-semiconductor (S2) drain electrode connection；First rectifier diode (the D1) cathode point
Not with the first metal-oxide-semiconductor (S1) drain electrode and buffering capacitor (C1) anode connection；Buffering capacitor (the C1) cathode respectively with it is continuous
Flow the anode and outputting inductance (L of diode (D)2) one end connection；Outputting inductance (the L2) the other end and output filtered electrical
Hold (C2) cathode connection；Second rectifier diode (the D2) anode respectively with the second metal-oxide-semiconductor (S2) source electrode, afterflow two
The cathode and output filter capacitor (C of pole pipe (D)2) anode connection；Load (the RL) it is parallel to output filter capacitor (C2) two
End.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920390880.6U CN209516748U (en) | 2019-03-26 | 2019-03-26 | A kind of output modulation circuit of wireless power transmission systems receiving side |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920390880.6U CN209516748U (en) | 2019-03-26 | 2019-03-26 | A kind of output modulation circuit of wireless power transmission systems receiving side |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209516748U true CN209516748U (en) | 2019-10-18 |
Family
ID=68187839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920390880.6U Active CN209516748U (en) | 2019-03-26 | 2019-03-26 | A kind of output modulation circuit of wireless power transmission systems receiving side |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209516748U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109818427A (en) * | 2019-03-26 | 2019-05-28 | 华南理工大学 | The output modulation circuit and its metal-oxide-semiconductor control method of wireless power transmission systems receiving side |
-
2019
- 2019-03-26 CN CN201920390880.6U patent/CN209516748U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109818427A (en) * | 2019-03-26 | 2019-05-28 | 华南理工大学 | The output modulation circuit and its metal-oxide-semiconductor control method of wireless power transmission systems receiving side |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102064708B (en) | Current-input parallel resonance direct-current/ direct-current converter and method | |
| EP3337024B1 (en) | Bidirectional resonant conversion circuit and converter | |
| CN210518900U (en) | High-power microwave power supply with adjustable duty ratio | |
| CN108418434B (en) | High-frequency isolation Sofe Switch DC-DC converter and modulator approach for high-power | |
| CN105119391A (en) | High-efficiency electric energy transmitting terminal and wireless electric energy transmission apparatus | |
| CN104218813A (en) | Cascaded resonance DC-DC conversion circuit combined with inductor and capacitor | |
| CN103023319B (en) | Band tap inductor large velocity ratio step-down Cuk circuit | |
| CN103155704B (en) | Efficient LED supply of electric power source | |
| CN107546959A (en) | A kind of Switching Power Supply, electronic equipment and Switching Power Supply control method | |
| CN110048520A (en) | Primary side has the wireless charging device of C-LCC compensation network | |
| CN104393762A (en) | DC-DC (direct current to direct current) converter circuit with high step-up ratio based on wireless electric energy transmission | |
| CN201345614Y (en) | High-power audio power amplifier switching power supply circuit | |
| CN109450260A (en) | A kind of capacitance series formula crisscross parallel circuit of reversed excitation | |
| CN109818427A (en) | The output modulation circuit and its metal-oxide-semiconductor control method of wireless power transmission systems receiving side | |
| CN109286307A (en) | A kind of Forward- flyback power factor correcting | |
| CN108712070B (en) | Based on ZCS PWM bi-directional DC-DC CUK converter, transformation system and method | |
| CN209516748U (en) | A kind of output modulation circuit of wireless power transmission systems receiving side | |
| CN107171563B (en) | The combined converter of tight adjustment output | |
| CN106487105B (en) | A kind of magnet coupled resonant type wireless power transfer of modified line coil structures | |
| CN205141847U (en) | Efficient electric energy transmitting terminal and wireless power transmission device | |
| CN110739872A (en) | novel bidirectional high-transformation-ratio SWISS rectifier | |
| CN114665700B (en) | Forward and flyback-resonant type single-stage bridgeless isolated PFC converter | |
| CN103441690A (en) | Method for controlling combined converter for achieving tight adjusting output with high-frequency alternating-current side connected in series | |
| TW202015304A (en) | Apparatus for transferring electrical power to an electrical load with converter | |
| CN206452314U (en) | A kind of Switching Power Supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |