CN104716748A - 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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- CN104716748A CN104716748A CN201310686802.8A CN201310686802A CN104716748A CN 104716748 A CN104716748 A CN 104716748A CN 201310686802 A CN201310686802 A CN 201310686802A CN 104716748 A CN104716748 A CN 104716748A
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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 invention relates to a kind of middle distance wireless power supply system and high frequency variable frequency power supply thereof.
Background technology
In middle distance wireless power supply system, when loading coil resonance frequency is 2MHz to 10MHz, (wireless) power delivery is most effective.In order to accurate resonance can be realized in this frequency range, reach the most efficient Energy Transfer, the general demand fulfillment of designed power supply three conditions: 1, certain resolution can be had in whole band limits; 2, in whole broadband range, higher power conversion efficiency is obtained; 3, the high frequency power signals frequency spectrum produced is single.Therefore, be necessary to design a kind of high frequency variable frequency power supply being applied to middle distance wireless power supply system newly.
Summary of the invention
The invention provides a kind of new middle distance wireless power supply system and high frequency variable frequency power supply thereof.
The invention provides a kind of high frequency variable frequency power supply of middle distance wireless power supply system, comprise wireless communication module, main control module, signal generating module, at least two-way power supply along separate routes, automatic impedance matching module and loading coil, described wireless communication module, main control module and signal generating module connect in turn, each described power supply is connected in parallel between the output of described signal generating module and the input of automatic impedance matching module along separate routes, the output of described automatic impedance matching module is connected with described loading coil, each described power supply comprises the driver module connected in turn along separate routes, power amplifier module and filter module, described main control module and the equal control connection of each driver module and control the switch of each described driver module.
Wireless communication module receives the frequency parameter required for loading coil power delivery, main control module is according to this frequency parameter adjustment signal generating module, generate multiple drive singal of corresponding multiple frequency range, main control module carrys out gating one road power supply along separate routes by the switch controlling each driver module, this gating power drive singal along separate routes inputs automatic impedance matching module successively after amplification, filtering, after carrying out impedance matching, last input load coil.
Described signal generating module comprises the signal generator module and digital isolator module that connect in turn, and described master controller connects the input of described signal generator module, the input of each described driver module of described digital isolator model calling.
Described digital isolator module for realizing the isolation of signal and noise, its circuit structure or circuit module that can adopt existing digital isolator or there is identical function.
Each described power supply also comprises isolation module along separate routes, described driver module, power amplifier module, filter module and isolation module connect in turn, the output of each described isolation module is connected with the input of described automatic impedance matching module, described main control module and the equal control connection of each isolation module and control the switch of each described isolation module.
Gating power isolation module is along separate routes open-minded, and the sinusoidal power signal obtained after enabling filtering inputs automatic impedance matching module.Non-gating power isolation module along separate routes disconnects, and avoids non-gating power signal disturbing gating power along separate routes along separate routes.
Described high frequency variable frequency power supply, also comprises standing wave and detects and protection module, and described standing wave detects and is connected described main control module and each power supply output along separate routes with protection module, as connected output and the main control module of each isolation module.
Standing wave detects and can be connected with main control module two-way signaling with protection module.
Described main control module can be MCU.
A kind of middle distance wireless power supply system, comprises described high frequency variable frequency power supply.
A control method for the high frequency variable frequency power supply of middle distance wireless power supply system, comprises the steps:
A) frequency parameter required for loading coil power delivery is received;
B) generate multiple drive singal of corresponding multiple frequency range according to described frequency parameter, the corresponding road power supply of each described drive singal along separate routes;
C) gating one road power supply along separate routes, and the described power supply be strobed drive singal along separate routes obtains the single sinusoidal power signal of frequency spectrum successively after amplification, filtering;
D) described sinusoidal power signal is after impedance matching, inputs described loading coil.
Described step c) in, all described power supply that isolation is not strobed is along separate routes.
Described steps d) in, Real-Time Monitoring standing-wave ratio, when standing-wave ratio is greater than set point, automatic cut-off power.
The invention has the beneficial effects as follows: by signalization generation module, higher resolution can be realized; By arranging automatic impedance matching module and power amplifier module, higher power conversion efficiency can be realized; By arranging filter module, the high frequency power signals frequency spectrum of generation is single.
Accompanying drawing explanation
Fig. 1 is the schematic block circuit diagram of present embodiment high frequency variable frequency power supply.
Embodiment
By reference to the accompanying drawings the present invention is described in further detail below by embodiment.
As shown in Figure 1, the high frequency variable frequency power supply of present embodiment middle distance wireless power supply system comprises wireless communication module, main control module, the shunt of signal generating module, at least two-way power supply, automatic impedance matching module and loading coil.Wireless communication module, main control module and signal generating module connect in turn.Every road power supply is a corresponding frequency range along separate routes.Each power supply is in parallel to be along separate routes located between the output of signal generating module and the input of automatic impedance matching module, and loading coil is connected with the output of automatic impedance matching module.Signal generating module comprises the signal generator module and digital isolator module that connect in turn, each power supply comprises the driver module, power amplifier module, filter module and the isolation module that connect in turn along separate routes, the input of each power supply driver module is along separate routes connected with the output of digital isolator module, and the output of each power supply isolation module is along separate routes connected with the input of automatic impedance matching module.Main control module outputs a control signal to each power supply driver module along separate routes and the isolation module of each power supply shunt, realizes the switch control rule of each driver module and the switch control rule to each isolation module.
Wireless communication module can adopt various circuit structure or the module that can realize radio communication.Main control module for realizing coordination, the control of each module to high frequency variable frequency power supply, as MCU (microcontroller).Automatic impedance matching module is for realizing the Auto-matching of loading coil resistance and the internal resistance of source.
High frequency variable frequency power supply can also comprise standing wave and detect and protection module, and this standing wave detects the output and the main control module that are connected each isolation module with protection module.
The operation principle of high frequency variable frequency power supply is as follows:
A) wireless communication module receives the frequency parameter met needed for loading coil power delivery;
B) main control module is according to the signal generator module in the frequency parameter adjustment signal generating module received, after digital isolator module, then generate the drive singal of respective frequencies;
C) this drive singal is divided into by main control module identification the driver module that multichannel frequency range delivers to corresponding power shunt respectively;
D) switch of master control module controls each power supply shunt driver module, make to only have a road power supply to keep path along separate routes in each moment, do not interfere with each other between each power supply shunt, namely in each moment, power supply driver module along separate routes in Jin You mono-road is open-minded;
E) gating power drive singal along separate routes amplifies through power amplifier module, obtains the power meeting loading coil requirement, then obtains the single sinusoidal power signal of a frequency spectrum by filter module; Main control module is again by controlling isolation module each power supply not needing to open isolation along separate routes simultaneously, prevents signal disturbing;
F) sinusoidal power signal obtained is injected among loading coil by automatic impedance matching module.Automatic impedance matching module can make loading coil keep 50 ohm (this resistance also can be designed to other resistance according to the internal resistance of source and loading coil), make power signal maximal efficiency input load coil, thus all requirements of wireless transmission can be met.
When automatic impedance matching can not meet the demands, cause reflection power larger, main control module can by obtaining this result to the monitoring of rear end standing-wave ratio.In order to protection power source, when standing-wave ratio is larger, standing wave detects and power supply can be allowed automatically to cut off with protection module, thus power supply can not be burnt.
Above content is in conjunction with concrete execution mode further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made.
Claims (6)
1. the high frequency variable frequency power supply of a middle distance wireless power supply system, it is characterized in that, comprise wireless communication module, main control module, signal generating module, at least two-way power supply along separate routes, automatic impedance matching module and loading coil, described wireless communication module, main control module and signal generating module connect in turn, each described power supply is connected in parallel between the output of described signal generating module and the input of automatic impedance matching module along separate routes, the output of described automatic impedance matching module is connected with described loading coil, each described power supply comprises the driver module connected in turn along separate routes, power amplifier module and filter module, described main control module and the equal control connection of each driver module and control the switch of each described driver module.
2. high frequency variable frequency power supply as claimed in claim 1, it is characterized in that, each described power supply also comprises isolation module along separate routes, described driver module, power amplifier module, filter module and isolation module connect in turn, the output of each described isolation module is connected with the input of described automatic impedance matching module, described main control module and the equal control connection of each isolation module and control the switch of each described isolation module.
3. high frequency variable frequency power supply as claimed in claim 1, it is characterized in that, described signal generating module comprises the signal generator module and digital isolator module that connect in turn, described master controller connects the input of described signal generator module, the input of each described driver module of described digital isolator model calling.
4. high frequency variable frequency power supply as claimed in claim 1, is characterized in that, also comprises standing wave and detects and protection module, and described standing wave detects and is connected described main control module and each described power supply output along separate routes with protection module.
5. a middle distance wireless power supply system, is characterized in that, comprises the high frequency variable frequency power supply in claim 1-4 described in any one.
6. a control method for the high frequency variable frequency power supply of middle distance wireless power supply system, is characterized in that, comprise the steps:
A) frequency parameter required for loading coil power delivery is received;
B) generate multiple drive singal of corresponding multiple frequency range according to described frequency parameter, the corresponding road power supply of each described drive singal along separate routes;
C) gating one road power supply along separate routes, and the described power supply be strobed drive singal along separate routes obtains the single sinusoidal power signal of frequency spectrum successively after amplification, filtering;
D) described sinusoidal power signal is after impedance matching, inputs described loading coil.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100270867A1 (en) * | 2009-04-22 | 2010-10-28 | Panasonic Electric Works Co., Ltd. | Non-contact power supply system |
| 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 |
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2013
- 2013-12-12 CN CN201310686802.8A patent/CN104716748B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100270867A1 (en) * | 2009-04-22 | 2010-10-28 | Panasonic Electric Works Co., Ltd. | Non-contact power supply system |
| 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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| CN104716748B (en) | 2017-05-24 |
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