CN102195367A - Wireless power supply device - Google Patents
Wireless power supply device Download PDFInfo
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- CN102195367A CN102195367A CN2011100977380A CN201110097738A CN102195367A CN 102195367 A CN102195367 A CN 102195367A CN 2011100977380 A CN2011100977380 A CN 2011100977380A CN 201110097738 A CN201110097738 A CN 201110097738A CN 102195367 A CN102195367 A CN 102195367A
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- wireless power
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Abstract
The invention discloses a wireless power supply device used for portable equipment employing a direct current (DC) power supply. The device comprises a power supply end and a receiving end, wherein the power supply end comprises a DC power supply, an inverter and a main coil which are connected in turn; the receiving end comprises a secondary coil, a rectifier and a DC-DC converter which are connected in turn; the main coil is in electromagnetic coupling with the secondary coil; the inverter is used for converting DC provided by the DC power supply into alternating current at specific frequency and transmitting the alternating current to the main coil, and an alternating magnetic field at the specific frequency is generated through the main coil; and the secondary coil is used for generating alternating induction current in the alternating magnetic field of the main coil, and the rectifier is used for converting the induction current into the DC and converting the DC into DC which meets load requirements through the DC-DC converter. The device solves the technical problem that a power supply system of the conventional DC power supply portable equipment cannot have durability and mobility simultaneously, and stable and durable electric energy can be provided for a plurality of loads in a short distance.
Description
Technical field
The present invention relates to a kind of wireless power supply, relate in particular to a kind of wireless power supply that is used to use the portable set of DC power supply.
Background technology
Along with development of electronic technology, increasing mobile device gets their way into people's lives.Usually, need a charger during to charging of mobile devices such as mobile phone, notebooks, an end is connected on the mains supply, and an other end is connected on the mobile device, and inconvenience is not only used in frequent plug, and damages easily.In view of such circumstances, produced the wireless power technology.
The wireless power technology, as the term suggests be exactly to utilize a kind of special installation under the situation that does not rely on electric wire, directly electronic equipment to be charged, generally can be divided into induction (utilize electric current to produce magnetic field and realize the short-range wireless power supply), magnetic resonance formula (utilizing the power supply of magnetic coupling resonance effects short-range wireless), wave radiation formula (power conversions becomes electric wave to power with radiation delivery) by coil.
At present, be used to the mode of device power supply in the closed container in the complex environment to mainly contain two kinds, a kind of is the mode that adopts internal battery, and another kind is the mode that adopts cable power.
Adopt the mode of internal battery, battery is embedded in the closed container, can satisfy the mobility and the portability of closed container under the specific environment.Yet the life-span of battery all is limited, when running down of battery, changes battery and has just become very big problem.Especially when closed container is in the rugged environment, in water, change the work that battery has just become a danger and taken time and effort.
For the mode that adopts cable power, link to each other with power supply unit with external circuits, do not exhaust though worry power supply, need to be connected with power supply unit always, can not realize portability of equipment and mobility, in a lot of occasions, all be inapplicable.
Induction wireless power supply system utilizes the electromagnetic induction coupling principle, in conjunction with modern electric, electronic technology and control technology, feeder ear and the mechanical separation of using electric loading have been realized, traditional many shortcomings of passing through metallic conductor contact power supply have been eliminated,, mechanism wear exposed as lead, carbon deposit, contact electric spark etc. are for safe power supply provides brand-new solution.This technology has compared extensive studies abroad, and some non-contact type induction coupling electric energy transmission system has dropped into trial run.
Summary of the invention
Technical problem to be solved by this invention is that the electric power system of the portable set of existing direct current supply can not take into account persistence and ambulant technical problem, and a kind of wireless power supply based on electromagnetic induction is provided.
The present invention solves the problems of the technologies described above by the following technical solutions:
A kind of wireless power supply comprises feeder ear and receiving end, and described feeder ear comprises DC power supply, inverter and the main coil that connects successively, and described receiving end comprises secondary coil, rectifier and the DC-DC transducer that connects successively; Described main coil and secondary coil electromagnetic coupled; The direct current that described inverter provides described DC power supply is converted to the alternating current of characteristic frequency and transfers to main coil, and produces the alternating magnetic field of this characteristic frequency by described main coil; Described secondary coil produces the induced current of alternation in the alternating magnetic field of described main coil, described rectifier is converted to direct current with induced current, and is converted to the direct current that meets load request through described DC-DC transducer.
As a kind of preferred version, described characteristic frequency is 100MHz.
As another kind of preferred version, be inserted with magnetic core in described main coil and/or the secondary coil.
Further, described receiving end and load are integrated in the closed container.
The present invention is converted into alternating magnetic field by inverter and main coil with the electric energy that DC power supply provides, and with the secondary coil of main coil electromagnetic coupled in induce the induced current of alternation, by rectifier and DC-DC transducer the induced current of alternation is converted to the direct current that meets load request then.The electric power system that the invention solves the portable set of existing direct current supply can not be taken into account persistence and ambulant technical problem, and can be implemented as in-plant a plurality of load provides and stablize lasting electric energy.
Description of drawings
Fig. 1 is the structural representation of wireless power supply described in the specific embodiment of the invention;
Fig. 2 is the structural representation of the feeder ear of wireless power supply described in the specific embodiment of the invention;
Fig. 3 is the structural representation of the receiving end of wireless power supply described in the specific embodiment of the invention;
Fig. 4 is the principle schematic of the bridge-type inverter of wireless power supply described in the specific embodiment of the invention;
Fig. 5 is the principle schematic of the bridge rectifier of wireless power supply described in the specific embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is elaborated:
Wireless power supply of the present invention comprises feeder ear and receiving end, and described feeder ear comprises DC power supply, inverter and the main coil that connects successively, and described receiving end comprises secondary coil, rectifier and the DC-DC transducer that connects successively; Described main coil and secondary coil electromagnetic coupled; The direct current that described inverter provides described DC power supply is converted to the alternating current of characteristic frequency and transfers to main coil, and produces the alternating magnetic field of this characteristic frequency by described main coil; Described secondary coil produces the induced current of alternation in the alternating magnetic field of described main coil, described rectifier is converted to direct current with induced current, and is converted to the direct current that meets load request through described DC-DC transducer.
In this embodiment, as shown in Figure 1, whole wireless power supply is divided into two parts, feeder ear and receiving end.Feeder ear is made up of DC power supply, main coil, main magnetic core, bridge-type inverter and control circuit, and receiving end is made up of secondary coil, secondary magnetic core, bridge rectifier and DC/DC transducer.
Because the power supply of feeder ear is a direct current, can not produce magnetic field, so need convert alternating current to direct current with inverter, and come the frequency of control transformation, the electric field that can obtain changing just, thereby the magnetic field that changes by controller at feeder ear.The basic principle of bridge-type inverter as shown in Figure 4, it utilizes the unidirectional conduction of diode, the conducting in twos by four diodes converts direct current to alternating current.As shown in Figure 4, VT1～VT4 is 4 arms of bridge-type inverter.VT1, VT4 forward conduction, VT2, VT3 oppositely by the time, load voltage is for just; VT1, VT4 oppositely end, and when VT2, VT3 forward conduction, load voltage has become alternating current to direct current for negative.Change two groups of switch switching frequencies, can change the frequency of output AC electricity.Adopt bridge-type inverter as shown in Figure 2 in this embodiment, comprise controller, four metal-oxide-semiconductors (Q1, Q2, Q3 and Q4) and respective drive circuit.During conducting, Q2/Q3 must turn-off when Q1/Q4, and on the contrary, during conducting, Q1/Q4 must turn-off when Q2/Q3.Controller control Q1/Q4 and Q2/Q3's is open-minded in turn, thereby direct current is transformed into alternating current, and the circle of serving as theme provides alternating current.In this embodiment, the ac frequency after the inversion is 100MHz.
The structure of receiving end comprises the secondary coil, bridge rectifier and the DC/DC transducer that connect successively as shown in Figure 3, is parallel with a filter capacitor C2 between secondary coil and the bridge rectifier.Bridge rectifier is the most frequently used circuit that utilizes the unidirectional conduction of diode to carry out rectification, conducting in twos by four diodes, the positive ends of transformer secondary voltage is linked to each other with the anode of load, the negative polarity end links to each other with negative terminal, makes and can obtain a unidirectional pulsating voltage in the load all the time.Its principle as shown in Figure 5, positive half cycle at coil e2, electric current flows out from the upper end of transformer secondary coil, can only flow to RL through diode VD1, flow back to transformer by diode VD3 again, so VD1, VD3 forward conduction, VD2, VD4 oppositely end, negative just down output voltage on polarity of generation in the load is; At the negative half period of coil e2, opposite with positive half cycle, electric current flows out from the lower end of transformer secondary coil, VD2, VD4 forward conduction, and VD1, VD3 oppositely end, negative just down output voltage on polarity of generation in the load still is.Direct current behind bridge rectifier and filter capacitor C2 rectifying and wave-filtering is converted to the required voltage/current of load operate as normal through the DC/DC transducer again.
In this embodiment, receiving end and load are integrated in the closed container.Thereby can prevent that the parts in receiving end and the load are subjected to the influence of hostile environment.When needs are powered to load or are charged, need not to open closed container, only need be with feeder ear near this closed container, receiving end can produce galvanic current, thereby directly powers or charge for load.
Wireless power supply of the present invention, a feeder ear can drive a plurality of receiving ends, and relative position relation allows dynamic change during work, just can realize stable power transfer within the specific limits as long as keep.Be particularly suitable for the mobile portable equipment in the complex environment (for example under water, poisonous, nuclear radiation etc.), avoided changing the danger of battery, satisfied mobility and persistent requirement simultaneously.
Claims (6)
1. a wireless power supply comprises feeder ear and receiving end, it is characterized in that, described feeder ear comprises DC power supply, inverter and the main coil that connects successively, and described receiving end comprises secondary coil, rectifier and the DC-DC transducer that connects successively; Described main coil and secondary coil electromagnetic coupled; The direct current that described inverter provides described DC power supply is converted to the alternating current of characteristic frequency and transfers to main coil, and produces the alternating magnetic field of this characteristic frequency by described main coil; Described secondary coil produces the induced current of alternation in the alternating magnetic field of described main coil, described rectifier is converted to direct current with induced current, and is converted to the direct current that meets load request through described DC-DC transducer.
2. wireless power supply according to claim 1 is characterized in that described characteristic frequency is 100MHz.
3. wireless power supply according to claim 1 is characterized in that, is inserted with magnetic core in described main coil and/or the secondary coil.
4. wireless power supply according to claim 1 is characterized in that described inverter is a bridge-type inverter.
5. wireless power supply according to claim 1 is characterized in that described rectifier is a bridge rectifier.
6. as claim 1-5 wireless power supply as described in each, it is characterized in that described receiving end and load are integrated in the closed container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100977380A CN102195367A (en) | 2011-04-19 | 2011-04-19 | Wireless power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100977380A CN102195367A (en) | 2011-04-19 | 2011-04-19 | Wireless power supply device |
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| CN102195367A true CN102195367A (en) | 2011-09-21 |
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| CN2011100977380A Pending CN102195367A (en) | 2011-04-19 | 2011-04-19 | Wireless power supply device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036322A (en) * | 2013-01-06 | 2013-04-10 | 哈尔滨工业大学 | Wireless energy transfer system |
| CN103545850A (en) * | 2012-07-09 | 2014-01-29 | 联想(北京)有限公司 | Electronic device |
| CN103956618A (en) * | 2014-05-13 | 2014-07-30 | 安徽中家智锐科技有限公司 | Non-contact type safety socket in direct current power distribution network |
| CN104182791A (en) * | 2013-05-23 | 2014-12-03 | 英飞凌科技股份有限公司 | Chip card |
| WO2015003430A1 (en) * | 2013-07-12 | 2015-01-15 | 重庆大学 | Inductive coupling mode-based wireless power supply system between aircraft, and power supply method |
| CN106371492A (en) * | 2016-11-17 | 2017-02-01 | 中惠创智无线供电技术有限公司 | Full bridge protection method and circuit, controller and wireless power supply system |
| CN107124041A (en) * | 2017-06-23 | 2017-09-01 | 慈溪市天泉电器科技有限公司 | Split type inductive electric supply installation and aquarium applied to Shui nationality articles for use |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030085684A1 (en) * | 2001-11-07 | 2003-05-08 | Quallion Llc | Implantable medical power module |
| CN201298757Y (en) * | 2008-08-19 | 2009-08-26 | 富达通科技股份有限公司 | Induction power supply |
| CN101911029A (en) * | 2007-11-16 | 2010-12-08 | 高通股份有限公司 | Wireless power bridge |
-
2011
- 2011-04-19 CN CN2011100977380A patent/CN102195367A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030085684A1 (en) * | 2001-11-07 | 2003-05-08 | Quallion Llc | Implantable medical power module |
| CN101911029A (en) * | 2007-11-16 | 2010-12-08 | 高通股份有限公司 | Wireless power bridge |
| CN201298757Y (en) * | 2008-08-19 | 2009-08-26 | 富达通科技股份有限公司 | Induction power supply |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545850A (en) * | 2012-07-09 | 2014-01-29 | 联想(北京)有限公司 | Electronic device |
| CN103036322A (en) * | 2013-01-06 | 2013-04-10 | 哈尔滨工业大学 | Wireless energy transfer system |
| CN104182791A (en) * | 2013-05-23 | 2014-12-03 | 英飞凌科技股份有限公司 | Chip card |
| CN104182791B (en) * | 2013-05-23 | 2018-05-01 | 英飞凌科技股份有限公司 | Chip card |
| WO2015003430A1 (en) * | 2013-07-12 | 2015-01-15 | 重庆大学 | Inductive coupling mode-based wireless power supply system between aircraft, and power supply method |
| CN103956618A (en) * | 2014-05-13 | 2014-07-30 | 安徽中家智锐科技有限公司 | Non-contact type safety socket in direct current power distribution network |
| CN106371492A (en) * | 2016-11-17 | 2017-02-01 | 中惠创智无线供电技术有限公司 | Full bridge protection method and circuit, controller and wireless power supply system |
| CN107124041A (en) * | 2017-06-23 | 2017-09-01 | 慈溪市天泉电器科技有限公司 | Split type inductive electric supply installation and aquarium applied to Shui nationality articles for use |
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Application publication date: 20110921 |