CN202444333U - Frequency tracking control device of magnetic-coupling resonance wireless power transmission system - Google Patents
Frequency tracking control device of magnetic-coupling resonance wireless power transmission system Download PDFInfo
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- CN202444333U CN202444333U CN2012200594769U CN201220059476U CN202444333U CN 202444333 U CN202444333 U CN 202444333U CN 2012200594769 U CN2012200594769 U CN 2012200594769U CN 201220059476 U CN201220059476 U CN 201220059476U CN 202444333 U CN202444333 U CN 202444333U
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Abstract
The utility model discloses a frequency tracking control device of a magnetic-coupling resonance wireless power transmission system. The frequency tracking control device is provided with a phase-locked closed-loop control system as a main unit. The frequency tracking control device is characterized in that the phase-locked closed-loop control system comprises a current transformer, a phase compensation comparator, a phase-locked loop and a PWM(pulse width modulation) driver which are connected in series sequentially. When the distance between a transmission device and a receiving device is changed, the coupling coefficient between a transmission antenna and a receiving antenna can be affected. Due to the fact that resonance frequency is changed by interference of reflection impedance, a phase difference is generated between current and voltage of a driving circuit, the system is deturned and the transmission efficiency is reduced. Accordingly, the phase-locked closed-loop control system can control switching frequency to vary along with LC(liquid crystal) resonance coupling frequency so that tracking control to frequency of the transmission circuit can be realized.
Description
Technical field
The utility model relates to electric equipment and electrical engineering field, specially refers to a kind of frequency-tracking control device of magnetic coupled resonance formula radio energy transmission system.
Background technology
Utilize electromagentic resonance to be coupled and realize that wireless power transmission is a kind of emerging wireless power transmission scheme.The characteristics of this transmission technology are not have responsive directivity, and transmission range is 10cm～5m, can pass through the namagnetic substance transmission of power; Have only the resonance coupling body transmission consumed energy of same frequency, therefore the electric energy transmitting of this form has the advantage of high-efficiency transfer.But should limitation be arranged technology in practical application, promptly the efficiency of transmission along with the change system of transmission range is difficult to be controlled at maximum rating.Many researchers propose through the change system parameters, such as: the resonance coil diameter, the resonant capacitance size, methods such as load size improve the efficiency of transmission of system.Yet for fixing equipment, the coil parameter of system, resonant capacitance size, load is big or small all basically no longer changes in the practical application, and the method that therefore changes system parameters is difficult in practical application, realize.
Other discovers; The efficiency of transmission of resonance coupling electric energy wireless transmitting system and 3 powers of distance are inversely proportional to; The variation that the efficiency of transmission of illustrative system is adjusted the distance is responsive; And the load of wireless power transmission systems is mobile device or terminal generally speaking, and there is certain ambiguity in the distance of transmission, how to guarantee that transmission system can efficiency operation be the social now subject matter that will solve when transmission range changed in certain scope.
In sum, to the defective of prior art, need a kind of frequency-tracking control device of magnetic coupled resonance formula radio energy transmission system especially, with the problem of mentioning more than solving.
The utility model content
The purpose of the utility model is to provide a kind of frequency-tracking control device of magnetic coupled resonance formula radio energy transmission system, through the employing special structural design, thus the purpose of realization the utility model.
The technical problem that the utility model solved can adopt following technical scheme to realize:
A kind of frequency-tracking control device of magnetic coupled resonance formula radio energy transmission system; Main body is the phase-locked loop closed-loop control system; It is characterized in that said phase-locked loop closed-loop control system comprises current transformer, phase compensation comparator, phase-locked loop and the pwm driver of series connection successively.
In an embodiment of the utility model, said current transformer connects the emission resonant tank, and pwm driver connects and upper control main circuit switch pipe.
The beneficial effect of the utility model is: structure and principle are simple, and real-time and practicality are high.
Description of drawings
Fig. 1 is the structured flowchart of the described frequency-tracking control device of the utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and be easy to understand understanding with effect, below in conjunction with embodiment, further set forth the utility model.
As shown in Figure 1; The frequency-tracking control device of the described a kind of magnetic coupled resonance formula radio energy transmission system of the utility model; Main body is the phase-locked loop closed-loop control system; It is characterized in that said phase-locked loop closed-loop control system comprises current transformer, phase compensation comparator, phase-locked loop and the pwm driver of series connection successively.Said current transformer connects the emission resonant tank, and pwm driver connects and upper control main circuit switch pipe.
The operation principle of the utility model is following: when emitter and receiving system when changing; Can influence the coupling coefficient between transmitting antenna and the reception antenna; Because the interference of reflected umpedance causes resonance frequency to change; Drive and have the phase difference generation between current in loop and the voltage, system's off resonance, efficiency of transmission reduces.This moment, the operation principle of frequency-tracking part was following: current transformer detects the electric current of emission resonant tank, and the electric current that is detected is converted into signal voltage difference V
0V
0, difference obtains V after amplifying
1Phase place, the phase place with input terminal voltage after it is compensated compares, in case system's off resonance the two must have phase difference to produce, comparative result can obtain V
1To V
1Carry out phase compensation, and compare, obtain the pulse voltage V consistent with the launching circuit resonance frequency with reference voltage
2V
2Be input to phase-locked loop, phase-locked loop output one and V
2Pwm driver is arrived in the pulse that frequency is identical, and the break-make of control main circuit switch pipe changes thereby make switching frequency follow LC resonance coupling frequency, realizes the frequency-tracking control to launching circuit.
More than show and described basic principle of the utility model and the advantage of principal character and the utility model.The technical staff of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; Under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection range to be defined by appending claims and equivalent thereof.
Claims (2)
1. the frequency-tracking control device of a magnetic coupled resonance formula radio energy transmission system; Main body is the phase-locked loop closed-loop control system; It is characterized in that said phase-locked loop closed-loop control system comprises current transformer, phase compensation comparator, phase-locked loop and the pwm driver of series connection successively.
2. the frequency-tracking control device of a kind of magnetic coupled resonance formula radio energy transmission system according to claim 1 is characterized in that, said current transformer connects the emission resonant tank, and pwm driver connects and upper control main circuit switch pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200594769U CN202444333U (en) | 2012-02-22 | 2012-02-22 | Frequency tracking control device of magnetic-coupling resonance wireless power transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200594769U CN202444333U (en) | 2012-02-22 | 2012-02-22 | Frequency tracking control device of magnetic-coupling resonance wireless power transmission system |
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| CN202444333U true CN202444333U (en) | 2012-09-19 |
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| CN2012200594769U Expired - Fee Related CN202444333U (en) | 2012-02-22 | 2012-02-22 | Frequency tracking control device of magnetic-coupling resonance wireless power transmission system |
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| CN104052161A (en) * | 2013-03-12 | 2014-09-17 | 海尔集团公司 | Wireless power transmission system adaptive to multi-load dynamic switching |
| CN104716752A (en) * | 2015-04-12 | 2015-06-17 | 湖南大学 | Induction electric power transmission control device and method |
| CN104993619A (en) * | 2015-07-17 | 2015-10-21 | 湖南文理学院 | Method and device for increasing working efficiency of wireless power transmission system during frequency drift |
| CN105226845A (en) * | 2014-05-27 | 2016-01-06 | 松下知识产权经营株式会社 | Power transmission device and wireless power transmission system |
| CN105656216A (en) * | 2014-11-28 | 2016-06-08 | 丰田自动车株式会社 | Electric power transmission device |
| US9590525B2 (en) | 2014-07-03 | 2017-03-07 | Eaton Capital | Wireless power transfer systems using load feedback |
| CN106816967A (en) * | 2017-03-29 | 2017-06-09 | 武汉大学 | For the resonance coupling system and dynamic charging method of the continuation of the journey of unmanned plane dynamic radio |
| CN107533116A (en) * | 2015-04-24 | 2018-01-02 | 皇家飞利浦有限公司 | Multichannel sends/received radio frequency (RF) system |
| US9979205B2 (en) | 2015-08-18 | 2018-05-22 | Eaton Capital Unlimited Company | Methods and circuits configured to provide for multi-phase wireless power transfer |
| US9984815B2 (en) | 2014-12-22 | 2018-05-29 | Eaton Capital Unlimited Company | Wireless power transfer apparatus and power supplies including overlapping magnetic cores |
| US10038324B2 (en) | 2015-01-06 | 2018-07-31 | Eaton Intelligent Power Limited | Methods, circuits and articles of manufacture for controlling wireless power transfer responsive to controller circuit states |
| CN108551341A (en) * | 2018-05-02 | 2018-09-18 | 上海顺久电子科技有限公司 | A kind of compensation method of phase-locked loop apparatus and phase-locked loop circuit |
| US10116230B2 (en) | 2013-12-30 | 2018-10-30 | Eaton Capital Unlimited Company | Methods, circuits and articles of manufacture for configuring DC output filter circuits |
| US10116144B2 (en) | 2015-05-22 | 2018-10-30 | Eaton Intelligent Power Limited | Wireless power transfer apparatus using enclosures with enhanced magnetic features and methods of fabricating the same |
| CN108808888A (en) * | 2018-06-08 | 2018-11-13 | 深圳市汇森无线传输有限公司 | A kind of wireless charging system and its resonance compensation shunt method |
| WO2020001207A1 (en) * | 2018-06-25 | 2020-01-02 | 华为技术有限公司 | Apparatus, device and method for detecting metal foreign matter in wireless charging system |
| US11990766B2 (en) | 2019-07-02 | 2024-05-21 | Eaton Intelligent Power Limited | Wireless power transfer apparatus with radially arrayed magnetic structures |
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2012
- 2012-02-22 CN CN2012200594769U patent/CN202444333U/en not_active Expired - Fee Related
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| WO2014139287A1 (en) * | 2013-03-12 | 2014-09-18 | 海尔集团公司 | Wireless power transmission system adapted for multiload dynamic switching |
| CN104052161A (en) * | 2013-03-12 | 2014-09-17 | 海尔集团公司 | Wireless power transmission system adaptive to multi-load dynamic switching |
| US10116230B2 (en) | 2013-12-30 | 2018-10-30 | Eaton Capital Unlimited Company | Methods, circuits and articles of manufacture for configuring DC output filter circuits |
| CN105226845B (en) * | 2014-05-27 | 2018-12-11 | 松下知识产权经营株式会社 | Power transmission device, Wireless power transmission system and foreign matter detecting method |
| CN105226845A (en) * | 2014-05-27 | 2016-01-06 | 松下知识产权经营株式会社 | Power transmission device and wireless power transmission system |
| US9590525B2 (en) | 2014-07-03 | 2017-03-07 | Eaton Capital | Wireless power transfer systems using load feedback |
| CN105656216B (en) * | 2014-11-28 | 2019-04-16 | 丰田自动车株式会社 | Electric power sending device |
| CN105656216A (en) * | 2014-11-28 | 2016-06-08 | 丰田自动车株式会社 | Electric power transmission device |
| US10978244B2 (en) | 2014-12-22 | 2021-04-13 | Eaton Intelligent Power Limited | Wireless power transfer apparatus and power supplies including overlapping magnetic cores |
| US9984815B2 (en) | 2014-12-22 | 2018-05-29 | Eaton Capital Unlimited Company | Wireless power transfer apparatus and power supplies including overlapping magnetic cores |
| US10038324B2 (en) | 2015-01-06 | 2018-07-31 | Eaton Intelligent Power Limited | Methods, circuits and articles of manufacture for controlling wireless power transfer responsive to controller circuit states |
| CN104716752A (en) * | 2015-04-12 | 2015-06-17 | 湖南大学 | Induction electric power transmission control device and method |
| CN107533116A (en) * | 2015-04-24 | 2018-01-02 | 皇家飞利浦有限公司 | Multichannel sends/received radio frequency (RF) system |
| CN107533116B (en) * | 2015-04-24 | 2021-07-06 | 皇家飞利浦有限公司 | Multi-channel transmit/receive Radio Frequency (RF) system |
| US10116144B2 (en) | 2015-05-22 | 2018-10-30 | Eaton Intelligent Power Limited | Wireless power transfer apparatus using enclosures with enhanced magnetic features and methods of fabricating the same |
| CN104993619A (en) * | 2015-07-17 | 2015-10-21 | 湖南文理学院 | Method and device for increasing working efficiency of wireless power transmission system during frequency drift |
| US9979205B2 (en) | 2015-08-18 | 2018-05-22 | Eaton Capital Unlimited Company | Methods and circuits configured to provide for multi-phase wireless power transfer |
| CN106816967B (en) * | 2017-03-29 | 2019-08-20 | 武汉大学 | Resonance coupling system and dynamic charging method for the continuation of the journey of unmanned plane dynamic radio |
| CN106816967A (en) * | 2017-03-29 | 2017-06-09 | 武汉大学 | For the resonance coupling system and dynamic charging method of the continuation of the journey of unmanned plane dynamic radio |
| CN108551341A (en) * | 2018-05-02 | 2018-09-18 | 上海顺久电子科技有限公司 | A kind of compensation method of phase-locked loop apparatus and phase-locked loop circuit |
| CN108808888A (en) * | 2018-06-08 | 2018-11-13 | 深圳市汇森无线传输有限公司 | A kind of wireless charging system and its resonance compensation shunt method |
| WO2020001207A1 (en) * | 2018-06-25 | 2020-01-02 | 华为技术有限公司 | Apparatus, device and method for detecting metal foreign matter in wireless charging system |
| US11870275B2 (en) | 2018-06-25 | 2024-01-09 | Huawei Technologies Co., Ltd. | Apparatus and method for detecting metal foreign matter in wireless charging system, and device |
| US11990766B2 (en) | 2019-07-02 | 2024-05-21 | Eaton Intelligent Power Limited | Wireless power transfer apparatus with radially arrayed magnetic structures |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120919 Termination date: 20130222 |