CN104716748B - Middle-distance wireless power supply system and high-frequency variable-frequency power source thereof - Google Patents
Middle-distance wireless power supply system and high-frequency variable-frequency power source thereof Download PDFInfo
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- CN104716748B CN104716748B CN201310686802.8A CN201310686802A CN104716748B CN 104716748 B CN104716748 B CN 104716748B CN 201310686802 A CN201310686802 A CN 201310686802A CN 104716748 B CN104716748 B CN 104716748B
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Abstract
The invention discloses a middle-distance wireless power supply system and a high-frequency variable-frequency power source thereof. The middle-distance wireless power supply system and the high-frequency variable-frequency power source thereof comprise a wireless communication module, a master control module, a signal generation module, two or more power source shunts, an automatic impedance matching module and a loading coil; the wireless communication module, the master control module and the signal generation module are connected in order, the power source shunts are connected between the output end of the signal generation module and the input end of the automatic impedance matching module in parallel, the output end of the automatic impedance matching module is connected with the loading coil, each power source shunt comprises a drive module, a power amplifier module and a filter module which are connected in order, and the master control module is connected with each drive module in a control mode and controls the on and off of each drive module. The middle-distance wireless power supply system and the high-frequency variable-frequency power source thereof have the advantages that higher resolution ratio can be realized through the arrangement of the signal generation module, higher power conversion efficiency can be realized through the arrangement of the automatic impedance matching module and the power amplifier module, and single high-frequency power signal frequency spectrum is generated through the armament of the filter module.
Description
Technical field
The present invention be in one kind apart from wireless power supply system and its high frequency variable-frequency power sources.
Background technology
Middle in wireless power supply system, when loading coil resonant frequency is 2MHz to 10MHz, (wireless) power is passed
Defeated efficiency highest.In order to be able to realize accurate resonance in this frequency range, most efficient energy transmission, designed power supply are reached
Generally require three conditions of satisfaction：1st, there can be certain resolution ratio in whole band limits；2nd, obtained in whole broadband range
Obtain power conversion efficiency higher；3rd, the high frequency power signals frequency spectrum for producing is single.Therefore, it is necessary to design a kind of new application
In the middle high frequency variable-frequency power sources apart from wireless power supply system.
The content of the invention
The present invention provide it is a kind of it is new in apart from wireless power supply system and its high frequency variable-frequency power sources.
The present invention provides a kind of middle high frequency variable-frequency power sources apart from wireless power supply system, including wireless communication module, master control
Module, at least signal generating module, two-way power supply branch, automatic impedance matching module and loading coil, the radio communication mold
Block, main control module and signal generating module are sequentially connected with, and each power supply branch is connected in parallel on the output of the signal generating module
Between end and the input of automatic impedance matching module, output end and the loading coil of the automatic impedance matching module connect
Connect, each power supply branch includes the drive module, power amplifier module and the filter module that are sequentially connected with, the main control module with it is each
Drive module controls the switch for connecting and controlling each drive module.
Frequency parameter required for wireless communication module reception loading coil power transmission, main control module is joined according to the frequency
Number adjustment signal generating module, multiple drive signals of generation correspondence multiple frequency range, main control module is by controlling each drive module
Switch gate power supply branch all the way, input is automatic after the drive signal of the gating power branch sequentially passes through amplification, filtering
Impedance matching module, after carrying out impedance matching, recently enters loading coil.
The signal generating module includes the signal generator module and digital isolator module that are sequentially connected with, the master control
Device processed connects the input of the signal generator module, and the digital isolator module connects the input of each drive module
End.
The digital isolator module is used to realize the isolation of signal and noise, its can using existing digital isolator or
Person has the circuit structure or circuit module of identical function.
Each power supply branch also includes isolation module, the drive module, power amplifier module, filter module and isolation mode
Block is sequentially connected with, and the output end of each isolation module is connected with the input of the automatic impedance matching module, the master control
Module and each isolation module control the switch for being connected and controlling each isolation module.
The isolation module of gating power branch is open-minded, the sinusoidal power signal obtained after filtering is input into automatic impedance
Matching module.The isolation module of not gated power supply branch disconnects, it is to avoid the signal interference gating power point of not gated power supply branch
Road.
Described high frequency variable-frequency power sources, also including standing wave detection and protection module, the standing wave detection connects with protection module
The output end of the main control module and each power supply branch is connect, the output end and main control module of each isolation module is such as connected.
Standing wave detection can be connected with protection module with main control module two-way signaling.
The main control module can be MCU.
High frequency variable-frequency power sources apart from wireless power supply system in one kind including described.
A kind of control method of the middle high frequency variable-frequency power sources apart from wireless power supply system, comprises the following steps：
A) frequency parameter required for receiving loading coil power transmission；
B) according to multiple drive signals of frequency parameter generation correspondence multiple frequency range, each described drive signal correspondence
Power supply branch all the way；
C) power supply branch all the way is gated, after the drive signal of the power supply branch being strobed sequentially passes through amplification, filtering
Obtain the single sinusoidal power signal of frequency spectrum；
D) sinusoidal power signal is by after impedance matching, being input into the loading coil.
In the step c), all described power supply branch that isolation is not gated on.
In the step d), real-time monitoring standing-wave ratio, when standing-wave ratio is more than setting value, automatically cuts off power supply.
The beneficial effects of the invention are as follows：There is module by setting signal, resolution ratio higher can be realized；By setting
Automatic impedance matching module and power amplifier module, can realize power conversion efficiency higher；By setting filter module, produce
High frequency power signals frequency spectrum it is single.
Brief description of the drawings
Fig. 1 is the schematic block circuit diagram of present embodiment high frequency variable-frequency power sources.
Specific embodiment
The present invention is described in further detail below by specific embodiment combination accompanying drawing.
As shown in figure 1, in present embodiment apart from wireless power supply system high frequency variable-frequency power sources include wireless communication module,
Main control module, at least signal generating module, two-way power supply branch, automatic impedance matching module and loading coil.Radio communication mold
Block, main control module and signal generating module are sequentially connected with.Per road power supply branch one frequency range of correspondence.Each power supply branch parallel connection is located at
Between the output end of signal generating module and the input of automatic impedance matching module, loading coil and automatic impedance matching module
Output end connection.Signal generating module includes the signal generator module and digital isolator module that are sequentially connected with, each power supply
Branch includes the drive module, power amplifier module, filter module and the isolation module that are sequentially connected with, the drive module of each power supply branch
Input be connected with the output end of digital isolator module, the output end of the isolation module of each power supply branch and automatic impedance
Input connection with module.Main control module output a control signal to each power supply branch drive module and each power supply branch every
From module, the switch control to each drive module and the switch control to each isolation module are realized.
Wireless communication module can be using the various circuit structures or module that can realize radio communication.Main control module is used for
Realize coordination, the control, such as MCU (microcontroller) to each module of high frequency variable-frequency power sources.Automatic impedance matching module is used for real
The Auto-matching of existing loading coil resistance and the internal resistance of source.
High frequency variable-frequency power sources can also include standing wave detection and protection module, the standing wave detection be connected with protection module respectively every
From the output end and main control module of module.
The operation principle of high frequency variable-frequency power sources is as follows：
A) wireless communication module receives the frequency parameter needed for meeting loading coil power transmission；
B) signal generator module of the main control module in the frequency parameter adjustment signal generating module for receiving, then
By the drive signal that respective frequencies are generated after digital isolator module；
C) drive signal is recognized by main control module and is divided into the driving mould that multichannel frequency range is sent to corresponding power branch respectively
Block；
D) switch of each power supply branch drive module of master control module controls so that there was only power supply point all the way at each moment
Road keeps path, is not interfere with each other between each power supply branch, i.e., at each moment, only the drive module of power supply branch is opened all the way
It is logical；
E) drive signal of gating power branch amplifies by power amplifier module, and acquisition meets the power of loading coil requirement,
A single sinusoidal power signal of frequency spectrum is obtained by filter module again；Main control module is again by controlling isolation module simultaneously
Each power supply branch isolation that need not be opened, anti-stop signal interference；
F) sinusoidal power signal for obtaining is injected among loading coil by automatic impedance matching module.Automatic impedance matching
Module can make loading coil be kept for 50 ohm, and (resistance can also be designed as other and hinder according to the internal resistance of source and loading coil
Value), make power signal maximal efficiency input load coil such that it is able to which what satisfaction was wirelessly transferred is required.
When automatic impedance matching can not meet requirement, cause echo power ratio larger, main control module can be by rear
The monitoring of standing-wave ratio is held to obtain this result.In order to protect power supply, when standing-wave ratio than it is larger when, standing wave detection with protection module can
To allow power supply to automatically cut off, so that power supply will not burn.
Above content is to combine specific embodiment further description made for the present invention, it is impossible to assert this hair
Bright specific implementation is confined to these explanations.For general technical staff of the technical field of the invention, do not taking off
On the premise of present inventive concept, some simple deduction or replace can also be made.
Claims (6)
1. a kind of middle high frequency variable-frequency power sources apart from wireless power supply system, it is characterised in that including wireless communication module, master control mould
Block, at least signal generating module, two-way power supply branch, automatic impedance matching module and loading coil, the wireless communication module,
Main control module and signal generating module are sequentially connected with, each power supply branch be connected in parallel on the signal generating module output end and
Between the input of automatic impedance matching module, the output end of the automatic impedance matching module is connected with the loading coil,
Each power supply branch includes the drive module, power amplifier module and the filter module that are sequentially connected with, the main control module and each drive
Dynamic model block controls the switch for connecting and controlling each drive module；The wireless communication module receives loading coil power and passes
Frequency parameter required for defeated, the main control module adjusts the signal generating module according to the frequency parameter, and generation correspondence is more
Multiple drive signals of individual frequency range, the main control module gates the electricity all the way by controlling the switch of each drive module
Source branch, the drive signal of the gating power branch is input into the automatic impedance matching module after sequentially passing through amplification, filtering, enters
After row impedance matching, the loading coil is recently entered.
2. high frequency variable-frequency power sources as claimed in claim 1, it is characterised in that each power supply branch also includes isolation module,
The drive module, power amplifier module, filter module and isolation module are sequentially connected with, the output end of each isolation module and institute
State the input connection of automatic impedance matching module, the main control module and each isolation module control be connected and control it is each described in
The switch of isolation module.
3. high frequency variable-frequency power sources as claimed in claim 1, it is characterised in that the signal generating module includes what is be sequentially connected with
Signal generator module and digital isolator module, the main control module connect the input of the signal generator module, institute
State the input that digital isolator module connects each drive module.
4. high frequency variable-frequency power sources as claimed in claim 1, it is characterised in that described also including standing wave detection and protection module
Standing wave detection is connected the output end of the main control module and each power supply branch with protection module.
5. apart from wireless power supply system in one kind, it is characterised in that become including the high frequency described in any one in claim 1-4
Frequency power.
6. in a kind of 1-4 such as claim as described in any one apart from wireless power supply system high frequency variable-frequency power sources control
Method, it is characterised in that comprise the following steps：
A) frequency parameter required for wireless communication module receives loading coil power transmission；
B) main control module generates multiple drive signals of correspondence multiple frequency ranges, each described drive signal according to the frequency parameter
Corresponding power supply branch all the way；
C) main control module gates power supply branch all the way, and the drive signal of the power supply branch being strobed is sequentially passed through to be put
Greatly, the single sinusoidal power signal of frequency spectrum is obtained after filtering；
D) sinusoidal power signal is by after impedance matching, being input into the loading coil.
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| CN201310686802.8A CN104716748B (en) | 2013-12-12 | 2013-12-12 | Middle-distance wireless power supply system and high-frequency variable-frequency power source thereof |
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| CN104716748B true CN104716748B (en) | 2017-05-24 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102355032A (en) * | 2011-11-01 | 2012-02-15 | 东南大学 | Wireless charging device |
| CN102412633A (en) * | 2011-11-17 | 2012-04-11 | 东南大学 | Power control system of wireless power transmission apparatus based on adjustable frequency |
| CN102868234A (en) * | 2011-07-08 | 2013-01-09 | 株式会社康泰克 | Non-contact power feeding apparatus |
| CN203827069U (en) * | 2013-12-12 | 2014-09-10 | 深圳大学 | Medium-range wireless power supply system and high- and variable-frequency power supply thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5554937B2 (en) * | 2009-04-22 | 2014-07-23 | パナソニック株式会社 | Contactless power supply system |
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2013
- 2013-12-12 CN CN201310686802.8A patent/CN104716748B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868234A (en) * | 2011-07-08 | 2013-01-09 | 株式会社康泰克 | Non-contact power feeding apparatus |
| CN102355032A (en) * | 2011-11-01 | 2012-02-15 | 东南大学 | Wireless charging device |
| CN102412633A (en) * | 2011-11-17 | 2012-04-11 | 东南大学 | Power control system of wireless power transmission apparatus based on adjustable frequency |
| CN203827069U (en) * | 2013-12-12 | 2014-09-10 | 深圳大学 | Medium-range wireless power supply system and high- and variable-frequency power supply thereof |
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