CN104617646A - Intelligent wireless charging device based on ZVS self-exciting resonance - Google Patents
Intelligent wireless charging device based on ZVS self-exciting resonance Download PDFInfo
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- CN104617646A CN104617646A CN201510083581.4A CN201510083581A CN104617646A CN 104617646 A CN104617646 A CN 104617646A CN 201510083581 A CN201510083581 A CN 201510083581A CN 104617646 A CN104617646 A CN 104617646A
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Abstract
The invention relates to an intelligent wireless charging device based on ZVS self-exciting resonance. The intelligent wireless charging device is characterized by further comprising a transmitting end power transformation module, a ZVS self-exciting resonance transmitting module, a wireless receiving and power transformation module and an intelligent control module. The transmitting end power transformation module transforms the electric supply into a direct current stabilizing power supply for the ZVS self-exciting resonance transmitting module to use. The ZVS self-exciting resonance transmitting module converts direct current into LC resonance alternating current through self-exciting oscillation and builds a magnetic field. The wireless receiving and power transformation module converts electromagnetic signals received from the magnetic field in a wireless mode into power and provides the proper power to a device to be charged through constant voltage constant current power transformation and the like. The intelligent control module is used for conducting overcurrent protection and over-charging protection on the device to be charged. The intelligent wireless charging device can be widely applied to the field of short distance wireless charging of low-power mobile devices (such as a mobile phone and a flat computer).
Description
Technical field
The present invention relates to a kind of intelligent radio charging device, particularly about the intelligent radio charging device of one based on ZVS (Zero VoltageSwitch, zero voltage switch) self-excitation magnetic resonance.
Background technology
At present, the principle of wireless charging technology has three kinds: induction charging, the charging of radio waves and magnetic field resonance type charging.Product is in the market based on induction and magnetic field resonance type two kinds of wireless charging solutions, wherein common charging solution have employed induction charging, such as QI (Wireless Power Consortium, wireless charging alliance) normal structure.
1) induction charging: induction charging connects alternating current on primary coil, by electromagnetic induction at secondary coil generation current, thus energy is transferred to receiving terminal from transmission ends, this transmission method needs to carry out short distance charging one to one, charging equipment needs to aim at coil, and charger must possess the ability to being carried out identification by charge prepd, otherwise to neighbouring any metallics transmitting energy, its heating can be caused thus produces dangerous.
2) radio waves charging: the charging of radio waves is primarily of microwave launcher and microwave receiving device composition, the radio wave energy of rebounding from wall can be captured, but a large amount of power sent due to reflector are wasted in the mode of radio wave, so through-put power and efficiency are all very low, the charging tasks of the mobile devices such as mobile phone cannot be completed within 2,3 hours.
3) magnetic field resonance type charging: magnetic field resonance type charging be the field frequency that produces according to different resonance coil identical time, can resonate in magnetic field, form the principle of Resonant energy transfer passage, thus realize the wireless transmission of electric energy, and field frequency is now called resonance frequency.Relative to above two kinds of common wireless power transmission modes, its Energy Transfer is apart from farther, and transmission direction is unrestricted, and magnetic field resonance type introduces resonance frequency, electric energy is transmitted under particular resonant frequency, improves its antijamming capability.
Magnetic field resonance type charging method adopts bridge circuit or bridge-type hard switching circuit realiration magnetic resonance mostly, and resonance frequency not easily obtains, and must protect required frequency.When the resonance frequency of different coil is inconsistent, also efficiency of transmission can be reduced, and when field frequency is too high, switching tube loss increases, and outside source need be had to provide specific time sequence signal driving switch pipe, drive circuit complexity is loaded down with trivial details, causes system comparatively huge, and these all directly limit the Distance geometry efficiency of wireless charging.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of improve radio energy as far as possible transmission range and efficiency of transmission and the intelligent radio charging device based on ZVS self-excitation magnetic resonance of intelligentized control method charging equipment.
For achieving the above object, the present invention takes following technical scheme: a kind of intelligent radio charging device based on ZVS self-excitation magnetic resonance, is characterized in that: it comprises transmitting terminal transformation of electrical energy module, ZVS self-excitation ejection values module, wireless receiving and transformation of electrical energy module and intelligent control module; Civil power is transformed to D.C. regulated power supply by described transmitting terminal transformation of electrical energy module, and for described ZVS self-excitation ejection values module; Direct current supply photovoltaic conversion is LC resonance alternating current by self-oscillation and sets up magnetic field by described ZVS self-excitation ejection values module; Electromagnetic signal by described magnetic field wireless receiving is changed into electric energy by described wireless receiving and transformation of electrical energy module, and converts thereof into available constant current constant voltage electrical energy form and be supplied to charging equipment; Described intelligent control module is used for carrying out overcurrent protection and over-charge protective to charging equipment.
Described transmitting terminal transformation of electrical energy module comprises synchronous rectification mechanism and a DC-DC mapping device; Civil power is become direct current signal by described synchronous rectification mechanism, and sends a described DC-DC mapping device to; A described DC-DC mapping device, to this direct current signal process, converts D.C. regulated power supply to for described ZVS self-excitation ejection values module.
Described synchronous rectification mechanism adopts metal-oxide-semiconductor full bridge rectifier.
Described ZVS self-excitation ejection values module comprises ZVS resonant circuit and transmitting coil, and described ZVS resonant circuit connects a described DC-DC mapping device; Described ZVS resonant circuit produces high frequency magnetic field, and by described transmitting coil emitting electromagnetic wave.
A described DC-DC mapping device and described 2nd DC-DC mapping device adopt KA3525 chip design DC chopper circuit to realize DC voltage conversion; Described ZVS resonant circuit adopts IRF540 switching tube design ZVS circuit to excite LC to vibrate.
Described wireless receiving and transformation of electrical energy module comprise receiving coil, AC-DC mapping device, the 2nd DC-DC mapping device and constant current-supplying mechanism; Described receiving coil is by transmitting coil described in magnetic resonance wireless connections;
Described receiving coil sends the interchange resonance potential received by high frequency magnetic field to described AC-DC mapping device; Described AC-DC mapping device converts thereof into direct voltage, and is sent to described 2nd DC-DC mapping device; Described 2nd DC-DC mapping device exports adjustable dc voltage, and the adjustable dc voltage of output is supplied described constant current-supplying mechanism; Described constant current-supplying mechanism provides constant current voltage to be that charging equipment is powered.
Described AC-DC mapping device adopts metal-oxide-semiconductor full bridge rectifier; Described constant current-supplying mechanism adopts LM3421 chip design constant current voltage stabilizing circuit to realize constant current output.
Described intelligent control module comprises current sensor, voltage sensor, single-chip microcomputer, relay and human-computer interaction interface, and presets current threshold and voltage threshold in described single-chip microcomputer, and described relay connects described 2nd DC-DC mapping device; Described current sensor and described voltage sensor input to described single-chip microcomputer by the electric current and voltage signal gathering charging equipment input, described single-chip microcomputer by contrast in it the current threshold that presets and voltage threshold judge: when the voltage of charging equipment input or electric current exceed threshold value, described single-chip microcomputer output signal controls the described actuating of relay, realize the shutoff of described 2nd DC-DC mapping device, in case charging equipment overcurrent or overcharge; When the voltage of charging equipment input or electric current do not exceed threshold value, described single-chip microcomputer does not export control signal, continues to charge to charging equipment; Show current charging voltage and electric current in real time by described human-computer interaction interface, and charging voltage threshold value and current threshold are set according to the specification requirement of charging equipment.
The present invention is owing to taking above technical scheme, it has the following advantages: 1, the present invention is owing to adopting magnetic resonance type wireless charging technology, resonant wireless charging has non-radiating electromagnetic energy resonant tunneling effect, design produces high-frequency resonant magnetic field, improve the anti-interference of delivery of electrical energy, and this oscillating magnetic field can not outside emitting electromagnetic wave, and just form a radiationless magnetic field around, its Energy Transfer is apart from farther, and transmission direction is unrestricted, its effective propagation path is tens centimetres to several meters.What therefore all adopt compared to present stage wireless charging device is induction type wireless charging technology, and propagation distance is longer.2, because ZVS resonant circuit produces resonance before and after metal-oxide-semiconductor switching process, switching tube is opened front voltage and is first dropped to zero, greatly reduce the switching loss of switching tube, again due to non-radiating electromagnetic energy resonant tunneling effect, make tens centimetres to several meters scope self-energy losses also little, and then make efficiency of transmission very high.3, native system is owing to have employed ZVS resonant circuit, can resonance voluntarily, and compared to conventional bridge circuit, circuit is simply easy to realize.In view of above reason, the present invention can be widely used in the short-distance wireless charging field of small-power mobile device (such as mobile phone, panel computer etc.).
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1, the present invention includes transmitting terminal transformation of electrical energy module 1, ZVS self-excitation ejection values module 2, wireless receiving and transformation of electrical energy module 3 and intelligent control module 4.
Wherein, civil power is transformed to D.C. regulated power supply by transmitting terminal transformation of electrical energy module 1, and for ZVS self-excitation ejection values module 2; Direct current supply photovoltaic conversion is LC resonance alternating current by self-oscillation and sets up magnetic field by ZVS self-excitation ejection values module 2; Electromagnetic signal by magnetic field wireless receiving is changed into electric energy by wireless receiving and transformation of electrical energy module 3, and converts thereof into available constant current constant voltage electrical energy form and be supplied to charging equipment; Intelligent control module 4 is for carrying out overcurrent protection and over-charge protective to charging equipment.
Transmitting terminal transformation of electrical energy module 1 comprises synchronous rectification mechanism 11 and a DC-DC mapping device 12.ZVS self-excitation ejection values module 2 comprises ZVS resonant circuit 21 and transmitting coil 22.Wireless receiving and transformation of electrical energy module 3 comprise receiving coil 31, AC-DC mapping device 32, the 2nd DC-DC mapping device 33 and constant current-supplying mechanism 34; Intelligent control module 4 comprises current sensor 41, voltage sensor 42, single-chip microcomputer 43, relay 44 and human-computer interaction interface 45, and presets current threshold and voltage threshold in single-chip microcomputer 43.
Synchronous rectification mechanism 11 is electrically connected a DC-DC mapping device 12, ZVS resonant circuit 21 and transmitting coil 22 successively, transmitting coil 22 is by magnetic resonance wireless connections receiving coil 31, and receiving coil 31 is electrically connected AC-DC mapping device 32, the 2nd DC-DC mapping device 33, constant current-supplying mechanism 34 and charging equipment successively.Current sensor 41 and voltage sensor 42 are connected electrically in the input of charging equipment, and connect the input of single-chip microcomputer 43 respectively, the output of single-chip microcomputer 43 connects constant current-supplying mechanism 34, relay 44 and human-computer interaction interface 45 respectively, and relay 44 is electrically connected the 2nd DC-DC mapping device 33.
In above-described embodiment, synchronous rectification mechanism 11 can adopt metal-oxide-semiconductor full bridge rectifier, and concrete LT4320 and IRF540 of employing chip realizes.One DC-DC mapping device 12 and the 2nd DC-DC mapping device 33 can adopt KA3525 chip design DC chopper circuit, realize DC voltage conversion.ZVS resonant circuit 21 can adopt IRF540 switching tube design ZVS circuit to excite LC to vibrate.AC-DC mapping device 32 can adopt metal-oxide-semiconductor full bridge rectifier equally, and concrete LT4320 and IRF540 of use chip realizes.Constant current-supplying mechanism 34 can adopt LM3421 chip design constant current voltage stabilizing circuit to realize constant current output.
When the present invention works:
1) the synchronous rectification mechanism 11 of civil power in transmitting terminal transformation of electrical energy module 1 is become direct current signal, and sent to a DC-DC mapping device 12 to this direct current signal process, convert D.C. regulated power supply to for ZVS self-excitation ejection values module 2;
2) the ZVS resonant circuit 21 in ZVS self-excitation ejection values module 2 produces high frequency magnetic field, and (this high frequency magnetic field is the magnetic field under transmitting coil 22 and receiving coil 31 form resonance state, acquisition can be precalculated), and by transmitting coil 22 emitting electromagnetic wave, according to the law of electromagnetic induction, also the magnetic field changed in receiving coil 31, when transmitting coil 22 is identical with the field frequency that receiving coil 31 produces, namely all resonance frequency is reached, resonate in magnetic field, form Resonant energy transfer passage, improve the efficiency of wireless power transmission;
3) wireless receiving and the receiving coil 31 in transformation of electrical energy module 3 by by magnetic field wireless receiving to the resonance potential that exchanges send AC-DC mapping device 32 to; AC-DC mapping device 32 converts thereof into direct voltage, and is sent to the 2nd DC-DC mapping device 33; 2nd DC-DC mapping device 33 exports adjustable dc voltage, and by the adjustable dc voltage supply constant current-supplying mechanism 34 exported, output constant current voltage is to charging equipment;
4) current sensor 41 in intelligent control module 4 and voltage sensor 42 send single-chip microcomputer 43 to by the electric current and voltage signal gathering charging equipment input, the current threshold that single-chip microcomputer 43 is preset in it by contrast and voltage threshold judge: when the voltage of charging equipment input or electric current exceed respective threshold, single-chip microcomputer 43 outputs signal control relay 44 action, realize the shutoff of the 2nd DC-DC mapping device 33, in case charging equipment overcurrent or overcharge; When the voltage of charging equipment input or electric current do not exceed threshold value, single-chip microcomputer 44 does not export control signal, continues to charge to charging equipment.
Show current charging voltage and electric current by human-computer interaction interface 45, and charging voltage threshold value and current threshold are set according to the specification requirement of charging equipment.In addition, when the charging voltage conversion of charging equipment, resistance and capacitance parameter in corresponding constant current-supplying mechanism 34 can be set by human-computer interaction interface 45, send control signal to constant current-supplying mechanism 34 by single-chip microcomputer 43 to realize exporting different constant current voltage, with the requirement of satisfied different charging equipment.
Above-mentioned each example is only for illustration of the present invention; wherein the structure of each parts, connected mode and manufacture craft etc. all can change to some extent; every equivalents of carrying out on the basis of technical solution of the present invention and improvement, all should not get rid of outside protection scope of the present invention.
Claims (8)
1. based on an intelligent radio charging device for ZVS self-excitation magnetic resonance, it is characterized in that: it comprises transmitting terminal transformation of electrical energy module, ZVS self-excitation ejection values module, wireless receiving and transformation of electrical energy module and intelligent control module;
Civil power is transformed to D.C. regulated power supply by described transmitting terminal transformation of electrical energy module, and for described ZVS self-excitation ejection values module;
Direct current supply photovoltaic conversion is LC resonance alternating current by self-oscillation and sets up magnetic field by described ZVS self-excitation ejection values module;
Electromagnetic signal by described magnetic field wireless receiving is changed into electric energy by described wireless receiving and transformation of electrical energy module, and converts thereof into available constant current constant voltage electrical energy form and be supplied to charging equipment;
Described intelligent control module is used for carrying out overcurrent protection and over-charge protective to charging equipment.
2. a kind of intelligent radio charging device based on ZVS self-excitation magnetic resonance as claimed in claim 1, is characterized in that: described transmitting terminal transformation of electrical energy module comprises synchronous rectification mechanism and a DC-DC mapping device; Civil power is become direct current signal by described synchronous rectification mechanism, and sends a described DC-DC mapping device to; A described DC-DC mapping device, to this direct current signal process, converts D.C. regulated power supply to for described ZVS self-excitation ejection values module.
3. a kind of intelligent radio charging device based on ZVS self-excitation magnetic resonance as claimed in claim 2, is characterized in that: described synchronous rectification mechanism adopts metal-oxide-semiconductor full bridge rectifier.
4. a kind of intelligent radio charging device based on ZVS self-excitation magnetic resonance as claimed in claim 2 or claim 3, it is characterized in that: described ZVS self-excitation ejection values module comprises ZVS resonant circuit and transmitting coil, and described ZVS resonant circuit connects a described DC-DC mapping device; Described ZVS resonant circuit produces high frequency magnetic field, and by described transmitting coil emitting electromagnetic wave.
5. a kind of intelligent radio charging device based on ZVS self-excitation magnetic resonance as claimed in claim 4, is characterized in that: a described DC-DC mapping device and described 2nd DC-DC mapping device adopt KA3525 chip design DC chopper circuit to realize DC voltage conversion; Described ZVS resonant circuit adopts IRF540 switching tube design ZVS circuit to excite LC to vibrate.
6. a kind of intelligent radio charging device based on ZVS self-excitation magnetic resonance as claimed in claim 5, is characterized in that: described wireless receiving and transformation of electrical energy module comprise receiving coil, AC-DC mapping device, the 2nd DC-DC mapping device and constant current-supplying mechanism; Described receiving coil is by transmitting coil described in magnetic resonance wireless connections;
Described receiving coil sends the interchange resonance potential received by high frequency magnetic field to described AC-DC mapping device; Described AC-DC mapping device converts thereof into direct voltage, and is sent to described 2nd DC-DC mapping device; Described 2nd DC-DC mapping device exports adjustable dc voltage, and the adjustable dc voltage of output is supplied described constant current-supplying mechanism; Described constant current-supplying mechanism provides constant current voltage to be that charging equipment is powered.
7. a kind of intelligent radio charging device based on ZVS self-excitation magnetic resonance as claimed in claim 6, is characterized in that: described AC-DC mapping device adopts metal-oxide-semiconductor full bridge rectifier; Described constant current-supplying mechanism adopts LM3421 chip design constant current voltage stabilizing circuit to realize constant current output.
8. a kind of intelligent radio charging device based on ZVS self-excitation magnetic resonance as claimed in claims 6 or 7, it is characterized in that: described intelligent control module comprises current sensor, voltage sensor, single-chip microcomputer, relay and human-computer interaction interface, and presetting current threshold and voltage threshold in described single-chip microcomputer, described relay connects described 2nd DC-DC mapping device;
Described current sensor and described voltage sensor input to described single-chip microcomputer by the electric current and voltage signal gathering charging equipment input, described single-chip microcomputer by contrast in it the current threshold that presets and voltage threshold judge: when the voltage of charging equipment input or electric current exceed threshold value, described single-chip microcomputer output signal controls the described actuating of relay, realize the shutoff of described 2nd DC-DC mapping device, in case charging equipment overcurrent or overcharge; When the voltage of charging equipment input or electric current do not exceed threshold value, described single-chip microcomputer does not export control signal, continues to charge to charging equipment; Show current charging voltage and electric current in real time by described human-computer interaction interface, and charging voltage threshold value and current threshold are set according to the specification requirement of charging equipment.
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Application publication date: 20150513 |