CN102856966A - Control circuit for working state of vehicle-mounted wireless charger and control method thereof - Google Patents
Control circuit for working state of vehicle-mounted wireless charger and control method thereof Download PDFInfo
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- CN102856966A CN102856966A CN2012103080808A CN201210308080A CN102856966A CN 102856966 A CN102856966 A CN 102856966A CN 2012103080808 A CN2012103080808 A CN 2012103080808A CN 201210308080 A CN201210308080 A CN 201210308080A CN 102856966 A CN102856966 A CN 102856966A
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Abstract
The invention provides a control circuit for a working state of a vehicle-mounted wireless charger and a control method thereof. The control circuit for the working state of the vehicle-mounted wireless charger has the advantages of simple principle and low cost and comprises a transmitting unit and a receiving unit, wherein the transmitting unit comprises a power supply interface, a transmission control circuit and a transmission coil, and the receiving unit comprises a reception coil, a reception control circuit and a charging interface. A key point is that the transmitting unit also comprises a current detection circuit used for detecting the current of the transmission coil, and the output end of the current detection circuit is connected with the transmission control circuit. Real-time detection of the output current of the transmission coil is performed by the transmitting unit through the current detection circuit, and whether the receiving unit is located in a receiving area or not is judged according to the output current of the transmission coil, so as to change the frequency of output signals according to the position of the receiving unit. The control circuit for the working state of the vehicle-mounted wireless charger has the advantages of simple circuit structure, high reliability, low cost and the like, and the control method is accurate and reliable.
Description
Technical field
The present invention relates to vehicle carried mobile phone charging technique field, be specifically related to a kind of onboard wireless charger working state controlling circuit and control method thereof.
Background technology
The onboard wireless charger is divided into transmitter unit and receiving element two parts, and transmitter unit connects the car load power supply, sends energy by wireless radiation, and the receiving element received energy also is charging device (for example mobile phone) charging.Receiving element is received energy in the zone of definition, and transmitter unit need to judge that receiving element is whether in the receiving area that defines.Present multiplex radio-frequency module scheme, namely transmitter unit and receiving element are equipped with radio circuit and the antenna that cooperatively interacts, and when receiving element entered the working region scope of radio circuit, transmitter unit can learn that receiving element is in the receiving area of definition.But the radio circuit relative complex, cost is higher.
Summary of the invention
The objective of the invention is to propose onboard wireless charger working state controlling circuit and the control method thereof that a kind of principle is simple, cost is low.
Onboard wireless charger working state controlling circuit of the present invention comprises transmitter unit and receiving element, described transmitter unit comprises power interface, countdown circuit and transmitting coil, and described receiving element comprises receiving coil, reception control circuit and charging inlet; Key is that described transmitter unit also comprises the current detection circuit for detection of the transmitting coil electric current, and the output of described current detection circuit links to each other with countdown circuit.
Further, described countdown circuit has two kinds of output signal frequencies, and described two kinds of output signal frequencies are resonance frequency F1 and the idle condition frequency F0 that is not equal to resonance frequency.
Further, described transmitting coil has three kinds of output current I1, I2, I3, wherein I1＜I2＜I3.
The control method of above-mentioned onboard wireless charger working state controlling circuit is as follows: transmitter unit utilizes current detection circuit to detect in real time the output current of transmitting coil, and judge according to the output current value of transmitting coil whether receiving element is in the receiving area, thereby change output signal frequency according to the position of receiving element.
Specifically, when the output current I0 of transmitting coil was I1, the output signal frequency of transmitter unit was idle condition frequency F0; When the output current I0 of I2＜=transmitting coil＜=I3, the output signal frequency of transmitter unit is resonance frequency F1; When the output current I0 of transmitting coil＞I3, the output signal frequency of transmitter unit is idle condition frequency F0.
Further, the initial output signal frequency of transmitter unit is idle condition frequency F0.
Concrete principle of the present invention is as follows:
When onboard wireless charger receiving element entered or shift out in the defined receiving area, because magnetic Field Coupling, the output current of the transmitting coil of transmitter unit can change to some extent.Sample by the output current to transmitting coil, and judge the position of receiving element by the size of this electric current, thereby can determine mode of operation.
Specifically:
After the onboard wireless charger starts, its mode of operation of transmitter unit initialization is the testing pattern, and the output signal frequency that transmitter unit is set is idle condition frequency F0, begin simultaneously to detect the output current of its transmitting coil, if the output current=I1 of transmitting coil then represents receiving element not in the receiving area, this moment, the output signal frequency of transmitter unit was idle condition frequency F0, and remain under the testing pattern, continue to detect in real time the output current of transmitting coil;
When the output current I0 of I2＜=transmitting coil＜=I3, represent that then receiving element enters in the receiving area, this moment, the mode of operation of transmitter unit changed charge mode into, and the output signal frequency of transmitter unit is resonance frequency F1, in charging process, continue to detect in real time the output current of transmitting coil;
Transmitter unit is in resonance condition during cell-phone charging, in the time of in receiving element shifts out the receiving area, if transmitter unit still is operated in resonance condition, the output current of transmitting coil will be higher than the electric current I 3 of normal operation so, be the output current I0＞I3 of transmitting coil, need to be made as the mode of operation of transmitter unit the testing pattern this moment, the output signal frequency of transmitter unit is idle condition frequency F0, this moment, the output current of transmitting coil can be adjusted into I1, and transmitter unit still detects the output current of its transmitting coil in real time simultaneously.
It is simple that onboard wireless charger working state controlling circuit of the present invention has a circuit structure, and reliability is high, low cost and other advantages, and its control method is accurately and reliably.
Description of drawings
Fig. 1 is the theory diagram of onboard wireless charger working state controlling circuit of the present invention.
Embodiment
The below contrasts accompanying drawing, by the description to embodiment, the effect of the mutual alignment between the shape of the specific embodiment of the present invention such as related each member, structure, the each several part and annexation, each several part and operation principle etc. are described in further detail.
Embodiment 1:
As shown in Figure 1, the onboard wireless charger working state controlling circuit of present embodiment comprises transmitter unit and receiving element, wherein transmitter unit comprises power interface, countdown circuit and transmitting coil, and receiving element comprises receiving coil, reception control circuit and charging inlet; Key is that transmitter unit also comprises the current detection circuit for detection of the transmitting coil electric current, and the output of described current detection circuit links to each other with countdown circuit.
This countdown circuit has two kinds of output signal frequencies, and described two kinds of output signal frequencies are resonance frequency F1 and the idle condition frequency F0 that is not equal to resonance frequency; And this transmitting coil has three kinds of output current I1, I2, I3, wherein I1＜I2＜I3.
The control method of above-mentioned onboard wireless charger working state controlling circuit is as follows: transmitter unit utilizes current detection circuit to detect in real time the output current of transmitting coil, and judge according to the output current value of transmitting coil whether receiving element is in the receiving area, thereby change output signal frequency according to the position of receiving element.
After the onboard wireless charger starts, its mode of operation of transmitter unit initialization is the testing pattern, and the output signal frequency that transmitter unit is set is idle condition frequency F0, begin simultaneously to detect the output current of its transmitting coil, if the output current=I1 of transmitting coil then represents receiving element not in the receiving area, this moment, the output signal frequency of transmitter unit was idle condition frequency F0, and remain under the testing pattern, continue to detect in real time the output current of transmitting coil;
When the output current I0 of I2＜=transmitting coil＜=I3, represent that then receiving element enters in the receiving area, this moment, the mode of operation of transmitter unit changed charge mode into, and the output signal frequency of transmitter unit is resonance frequency F1, in charging process, continue to detect in real time the output current of transmitting coil;
Transmitter unit is in resonance condition during cell-phone charging, in the time of in receiving element shifts out the receiving area, if transmitter unit still is operated in resonance condition, the output current of transmitting coil will be higher than the electric current I 3 of normal operation so, be the output current I0＞I3 of transmitting coil, need to be made as the mode of operation of transmitter unit the testing pattern this moment, the output signal frequency of transmitter unit is idle condition frequency F0, this moment, the output current of transmitting coil can be adjusted into I1, and transmitter unit still detects the output current of its transmitting coil in real time simultaneously.
The above has carried out exemplary description to the present invention by reference to the accompanying drawings; obvious realization of the present invention is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; or without improving design of the present invention and technical scheme are directly applied to other occasion, all in protection scope of the present invention.
Claims (6)
1. an onboard wireless charger working state controlling circuit comprises transmitter unit and receiving element, and described transmitter unit comprises power interface, countdown circuit and transmitting coil, and described receiving element comprises receiving coil, reception control circuit and charging inlet; It is characterized in that described transmitter unit also comprises the current detection circuit for detection of the transmitting coil electric current, the output of described current detection circuit links to each other with countdown circuit.
2. onboard wireless charger working state controlling circuit according to claim 1, it is characterized in that described countdown circuit has two kinds of output signal frequencies, described two kinds of output signal frequencies are resonance frequency F1 and the idle condition frequency F0 that is not equal to resonance frequency.
3. onboard wireless charger working state controlling circuit according to claim 1 and 2 is characterized in that described transmitting coil has three kinds of output current I1, I2, I3, wherein I1＜I2＜I3.
4. the control method of onboard wireless charger working state controlling circuit according to claim 3, it is characterized in that transmitter unit utilizes current detection circuit to detect in real time the output current of transmitting coil, and judge according to the output current value of transmitting coil whether receiving element is in the receiving area, thereby change output signal frequency according to the position of receiving element.
5. the control method of onboard wireless charger working state controlling circuit according to claim 4 is characterized in that comprising the steps: that when the output current I0 of transmitting coil was I1, the output signal frequency of transmitter unit was idle condition frequency F0; When the output current I0 of I2＜=transmitting coil＜=I3, the output signal frequency of transmitter unit is resonance frequency F1; When the output current I0 of transmitting coil＞I3, the output signal frequency of transmitter unit is idle condition frequency F0.
6. the control method of onboard wireless charger working state controlling circuit according to claim 5, the initial output signal frequency that it is characterized in that transmitter unit is idle condition frequency F0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103080808A CN102856966A (en) | 2012-08-28 | 2012-08-28 | Control circuit for working state of vehicle-mounted wireless charger and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103080808A CN102856966A (en) | 2012-08-28 | 2012-08-28 | Control circuit for working state of vehicle-mounted wireless charger and control method thereof |
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| CN102856966A true CN102856966A (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012103080808A Pending CN102856966A (en) | 2012-08-28 | 2012-08-28 | Control circuit for working state of vehicle-mounted wireless charger and control method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560551A (en) * | 2013-10-09 | 2014-02-05 | 奇瑞汽车股份有限公司 | Prompt circuit used when charging of vehicle-mounted mobile phone wireless charger is completed |
| CN107302249A (en) * | 2017-08-05 | 2017-10-27 | 常州瑞神安医疗器械有限公司 | A kind of vivo implantation type Medical Devices wireless charging method |
| CN107465275A (en) * | 2017-08-05 | 2017-12-12 | 常州瑞神安医疗器械有限公司 | A kind of et al. Ke Medical Devices charge coil localization method |
| CN109631261A (en) * | 2018-12-24 | 2019-04-16 | 广东美的白色家电技术创新中心有限公司 | A kind of fan, humidifier and air handling system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010040015A2 (en) * | 2008-10-03 | 2010-04-08 | Access Business Group International Llc | Power system |
| CN102355035A (en) * | 2011-09-27 | 2012-02-15 | 青岛海信电器股份有限公司 | Wireless charging transmitting device, wireless charging system and wireless charging control method |
| CN102611215A (en) * | 2012-04-10 | 2012-07-25 | 海尔集团公司 | Wireless electric energy transmitting device and wireless charging system |
-
2012
- 2012-08-28 CN CN2012103080808A patent/CN102856966A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010040015A2 (en) * | 2008-10-03 | 2010-04-08 | Access Business Group International Llc | Power system |
| CN102355035A (en) * | 2011-09-27 | 2012-02-15 | 青岛海信电器股份有限公司 | Wireless charging transmitting device, wireless charging system and wireless charging control method |
| CN102611215A (en) * | 2012-04-10 | 2012-07-25 | 海尔集团公司 | Wireless electric energy transmitting device and wireless charging system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560551A (en) * | 2013-10-09 | 2014-02-05 | 奇瑞汽车股份有限公司 | Prompt circuit used when charging of vehicle-mounted mobile phone wireless charger is completed |
| CN107302249A (en) * | 2017-08-05 | 2017-10-27 | 常州瑞神安医疗器械有限公司 | A kind of vivo implantation type Medical Devices wireless charging method |
| CN107465275A (en) * | 2017-08-05 | 2017-12-12 | 常州瑞神安医疗器械有限公司 | A kind of et al. Ke Medical Devices charge coil localization method |
| CN109631261A (en) * | 2018-12-24 | 2019-04-16 | 广东美的白色家电技术创新中心有限公司 | A kind of fan, humidifier and air handling system |
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Application publication date: 20130102 |