CN105490395A - Automatically detuned receiving terminal in wireless charging and energy adjusting method - Google Patents
Automatically detuned receiving terminal in wireless charging and energy adjusting method Download PDFInfo
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- CN105490395A CN105490395A CN201510863437.2A CN201510863437A CN105490395A CN 105490395 A CN105490395 A CN 105490395A CN 201510863437 A CN201510863437 A CN 201510863437A CN 105490395 A CN105490395 A CN 105490395A
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Abstract
The invention relates to an automatically detuned receiving terminal in wireless charging and an energy adjusting method. The receiving terminal is applied to a wireless charging mode comprising a transmitting terminal and one receiving terminal, or the receiving terminal is applied to the wireless charging mode comprising one transmitting terminal and at least two receiving terminals; the receiving terminal comprises an LC oscillator module, a half-wave rectifier module, a load module and a detuning adjustment module; the LC oscillator module comprises a receiving terminal coil (J1) and an oscillating capacitor (C); an input end of the half-wave rectifier module is connected with a second end of the receiving terminal coil (J1); the load module is connected with an output end of the half-wave rectifier module; the detuning adjustment module comprises multiple groups of capacitors and switches, which are connected with one another in series; and each group of capacitors and switches are connected with the oscillating capacitor (C). By the automatically detuned receiving terminal with the structure in wireless charging and the energy adjusting method, the receiving terminal can carry out self-adjustment under the condition of not relying on the transmitting terminal, so that the energy requirements of different receiving terminals can be quickly met in a one-to-many charging mode.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to wireless charging, specifically refer to receiving terminal and the energy adjustment method of the automatic off resonance of a kind of wireless charging.
Background technology
The wireless charging technical standard (QI standard) of wireless charging alliance (WPC) has small-power (5W) based on magnetic inductive and middle power (15W) standard, also has resonant (RTF) standard of up-to-date proposition.Existing QI small-power and middle power standard all one to one mode charge, and existing wireless charging technology is generally only rely on transmitting terminal to the energy regulating receiving terminal to need, and receiving terminal does not do any self-regulation.In charging process one to one, transmit requirement when receiving terminal proposes energy by communication bag to transmitting terminal, transmitting terminal regulates by changing several modes such as operating frequency, phase place or duty ratio the energy being transferred to receiving terminal.
The mode that existing this dependence transmitting terminal carrys out adjusting energy is only applicable to man-to-man wireless charging mode, and is not suitable for one-to-many charging modes in the resonance standard of up-to-date proposition.
Wireless charging system QI resonance standard-required transmitting terminal is identical with the natural mode shape of receiving terminal, and requires that transmitting terminal is operated in its natural frequency, and then pass through transmitting terminal coil coupling to receiving terminal coil, energy-delivering like this efficiency is the highest.Transmitting terminal is only relied on to regulate receiving terminal to need the mode of energy and the one-to-many charging modes mentioned in inapplicable QI resonance standard at present.And resonance standard-required transmitting terminal must operate in natural frequency, the transmitting terminal in that is resonance standard can not change operating frequency, can only regulate transmitting energy by changing other modes such as phase place and duty ratio.But it is unidirectional that this simple dependence transmitting terminal does the mode regulated, multiple receiving terminal different-energy demand can not be adapted to.
Summary of the invention
The object of the invention is the shortcoming overcoming above-mentioned prior art, providing a kind of for requiring that receiving terminal possesses self-regulation energy and provides possibility and solve different receiving terminal to the receiving terminal of the automatic off resonance of wireless charging of the problem that the energy requirement of same transmitting terminal conflicts and energy adjustment method in the one-to-many manner in wireless charging resonance standard.
To achieve these goals, the receiving terminal of the automatic off resonance of wireless charging of the present invention and energy adjustment method have following formation:
The receiving terminal of the automatic off resonance of this wireless charging, its main feature is, described receiving terminal is for comprising in the wireless charging pattern of a transmitting terminal and a receiving terminal, or described receiving terminal is for comprising in the wireless charging pattern of a transmitting terminal and at least two receiving terminals; Described receiving terminal comprises:
LC oscillation module, comprises receiving terminal coil J1 and oscillating capacitance C, and the first end of described receiving coil J1 is connected with the first end of described oscillating capacitance C, the second end ground connection of described oscillating capacitance C;
Half-wave rectification block, its input is connected with the second end of described receiving terminal coil (J1);
Load blocks, is connected with the output of described half-wave rectification block;
Off resonance adjustment module, comprises electric capacity and switch that array connects mutually, and each group the electric capacity of series connection and switch are all in parallel with described oscillating capacitance C mutually.
Further, described off resonance adjustment module comprises the first electric capacity (C1) and first switch (K1) of series connection mutually, second electric capacity (C2) of mutual series connection and second switch (K2), 3rd electric capacity (C3) of mutual series connection and the 3rd switch (K3), 4th electric capacity (C4) of mutual series connection and the 4th switch (K4), described off resonance adjustment module is by control first switch (K1), second switch (K2), the disconnection of the 3rd switch (K3) and the 4th switch (K4) and closedly carry out off resonance adjustment load voltage V, threshold voltage V is equaled to make load voltage V.
Further, described half-wave rectification block comprises the first diode (D1), the second diode (D2) and the 5th electric capacity (C5); The AC signal that receiving terminal coil (J1) exports is transformed into direct current signal by the first diode (D1), the second diode (D2) and the 5th electric capacity (C5) by described half-wave rectification block.
The invention still further relates to the method for the automatic adjusting energy of receiving terminal in a kind of wireless charging, its main feature is, described method comprises the following steps:
(1) change of curtage in load is detected;
(2) if described curtage becomes large or diminishes, then the energy size of the receiving terminal described in being regulated by described off resonance adjustment module.
Further, described off resonance adjustment module comprises four groups of electric capacity and switch of mutually connecting, and four groups of described electric capacity of mutually connecting and switch comprise the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the 4th electric capacity (C4), the first switch (K1), second switch (K2), the 3rd switch (K3), the 4th switch (K4); Off resonance adjustment module is by the disconnection of control first switch (K1), second switch (K2), the 3rd switch (K3) and the 4th switch (K4) and closedly carry out off resonance and adjust load voltage V, equals threshold voltage V1 to make load voltage V.
Have employed receiving terminal and the energy adjustment method of the automatic off resonance of wireless charging in this invention, for in wireless charging system resonance standard, one-to-many manner provides the method for receiving terminal self-regulation energy, solve the energy collision problem that different receiving terminal proposes, can fast and stable load output voltage, in the wireless charging system of one-to-many, provide different energy for different receiving terminal, meet respective different demand.
Accompanying drawing explanation
Fig. 1 is the structural representation of the receiving terminal of the automatic off resonance of wireless charging of the present invention.
Fig. 2 is the circuit diagram of the receiving terminal of the automatic off resonance of wireless charging of the present invention.
Fig. 3 is the schematic diagram of the method for the automatic adjusting energy of receiving terminal in wireless charging of the present invention.
Embodiment
In order to more clearly describe technology contents of the present invention, conduct further description below in conjunction with specific embodiment.
Refer to shown in Fig. 1, the receiving terminal of the automatic off resonance of wireless charging of the present invention is for comprising in the wireless charging pattern of a transmitting terminal and a receiving terminal, or described receiving terminal is for comprising in the wireless charging pattern of a transmitting terminal and at least two receiving terminals; Described receiving terminal comprises:
LC oscillation module, comprises receiving terminal coil J1 and oscillating capacitance C, and the first end of described receiving coil J1 is connected with the first end of described oscillating capacitance C, the second end ground connection of described oscillating capacitance C; The natural frequency of receiving terminal LC oscillation module is F.Requiring that transmitting terminal oscillating circuit is identical with the natural frequency of receiving terminal oscillating circuit in wireless charging resonance standard, is therefore all F, and such transmitting terminal coil working, at its natural frequency F, can make wireless charging system capacity usage ratio the highest.
Half-wave rectification block, its input is connected with the second end of described receiving terminal coil (J1);
Load blocks, is connected with the output of described half-wave rectification block; Load is that the voltage of resistance R, R is called load voltage, and note load voltage is V, and note load request voltage, namely threshold voltage is V1.
Off resonance adjustment module, comprises electric capacity and switch that array connects mutually, and each group the electric capacity of series connection and switch are all in parallel with described oscillating capacitance C mutually.
In a preferred embodiment, described off resonance adjustment module comprises four groups of electric capacity and switch of mutually connecting, and four groups of described electric capacity of mutually connecting and switch comprise the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the first K switch 1, second switch K2, the 3rd K switch 3, the 4th K switch 4; Described off resonance adjustment module is by control first K switch 1), the disconnection of second switch (K2), the 3rd switch (K3) and the 4th switch (K4) and closedly carry out off resonance and adjust load voltage V, equal threshold voltage V1 to make load voltage V; In a preferred embodiment, the first end of the first described electric capacity C1, the first end of the second described electric capacity C2, the first end of the 3rd described electric capacity C3, the first end of the 4th described electric capacity C4 are all connected with the first end of described oscillating capacitance C; Second end of the first described electric capacity C1 is connected with the first end of the first described K switch 1; Second end of the second described electric capacity C2 is connected with the first end of described second switch K2; Second end of the 3rd described electric capacity C3 is connected with the first end of the 3rd described K switch 3; Second end of the 4th described electric capacity C4 is connected with the first end of the 4th described K switch 4; Second end of the first described K switch 1, second end of second switch K2, the second end of the 3rd K switch 3, the second end of the 4th K switch 4 are all connected with second end of described oscillating capacitance C.
In a preferred embodiment, described half-wave rectification block comprises the first diode D1, the second diode D2 and the 5th electric capacity C5, described half-wave rectification block is by the first diode (D1), the AC signal that receiving terminal coil (J1) exports is transformed into direct current signal by the second diode (D2) and the 5th electric capacity (C5), in a preferred embodiment, the positive input of the first described diode D1 is connected with second end of described oscillating capacitance C, the reverse input end of the first described diode D1 is connected with second end of described receiving coil J1, the positive input of the second described diode D2 is connected with the reverse input end of the first described diode D1, the reverse input end of the second described diode D2 is connected with the first end of the 5th described electric capacity C5, and second end of the 5th described electric capacity C5 is connected with second end of described oscillating capacitance C.First diode D1 and the second diode D2 is responsible for positive half to divide output, and the 5th electric capacity C5 filtering exchanges, and retains direct current and flows to load.
The invention provides a kind of method of receiving terminal self-regulation energy in wireless charging system QI resonance standard, to have employed in method in receiving terminal LC oscillating circuit and be in parallelly used for electric capacity that off resonance regulates to control final output loading voltage, and each electric capacity being used for off resonance adjustment has a corresponding switch control rule, the energy of receiving terminal can be regulated like this when not changing transmitting terminal phase place and duty ratio first, making each receiving terminal when one-to-many wireless charging can self-regulation institute energy requirement.Refer to shown in Fig. 3, described method comprises the following steps:
(1) change of curtage in load is detected;
(2) if described curtage becomes large or diminishes, then the energy size of the receiving terminal described in being regulated by described off resonance adjustment module.
In a preferred embodiment, off resonance adjustment module is by the disconnection of control first K switch 1, second switch K2, the 3rd K switch 3 and the 4th K switch 4 and closedly carry out off resonance adjustment load voltage V, equals threshold voltage V1 to make load voltage V;
Wherein, in one embodiment, the first state is: the first described K switch 1, described second switch K2, the 3rd described K switch 3, the 4th described K switch 4 are all opened;
Second state and the third state are: the first described K switch 1 closes, and described second switch K2, the 3rd described K switch 3, the 4th described K switch 4 are all opened;
4th state and the 5th state are: the first described K switch 1, described second switch K2 close, and the 3rd described K switch 3, the 4th described K switch 4 are all opened;
6th state and the 7th state are: the first described K switch 1, described second switch K2, the 3rd described K switch 3 close, and the 4th described K switch 4 is opened;
8th state is: the first described K switch 1, described second switch K2, the 3rd described K switch 3, the 4th described K switch 4 are all closed;
First condition is: the voltage of load blocks is less than threshold voltage V1;
Second condition is: the voltage of load blocks equals threshold voltage V1;
Article 3 part is: the time that the voltage of load blocks is less than threshold voltage V1 exceedes threshold time T, or the time that the voltage of load blocks is greater than threshold voltage V1 exceedes threshold time T;
Described step (2) is specially:
When described receiving terminal is in the first state:
If detect that the voltage of described load blocks meets first condition, then described receiving terminal keeps the first state constant;
If detect that the voltage of described load blocks meets second condition, then described receiving terminal enters the second state;
When described receiving terminal is in the second state:
If detect that the voltage of described load blocks meets first condition, then described receiving terminal enters the first state;
If detect that the voltage of described load blocks meets second condition or Article 3 part, then described receiving terminal enters the 4th state;
When described receiving terminal is in the 4th state:
If detect that the voltage of described load blocks meets first condition, then described receiving terminal enters the third state;
If detect that the voltage of described load blocks meets second condition or Article 3 part, then described receiving terminal enters the 6th state;
When described receiving terminal is in the 6th state:
If detect that the voltage of described load blocks meets first condition, then described receiving terminal enters the 5th state;
If detect that the voltage of described load blocks meets second condition or Article 3 part, then described receiving terminal enters the 8th state;
When described receiving terminal is in the 8th state:
If detect that the voltage of described load blocks meets first condition, then described receiving terminal enters the 7th state;
If detect that the voltage of described load blocks meets second condition, then described receiving terminal keeps the 8th state;
When described receiving terminal is in the 7th state:
If detect that the voltage of described load blocks meets second condition, then described receiving terminal enters the 8th state;
If detect that the voltage of described load blocks meets first condition or second condition, then described receiving terminal enters the 5th state;
When described receiving terminal is in the 5th state:
If detect that the voltage of described load blocks meets second condition, then described receiving terminal enters the 6th state;
If detect that the voltage of described load blocks meets first condition or Article 3 part, then described receiving terminal enters the third state;
When described receiving terminal is in the third state:
If detect that the voltage of described load blocks meets second condition, then described receiving terminal enters the 4th state;
If detect that the voltage of described load blocks meets first condition or Article 3 part, then described receiving terminal enters the first state.
In other implementations, other redirects control organizing switches can be carried out according to the difference of each state and condition.
In actual applications, off resonance adjustment module is by the disconnection of control K1, K2, K3 and K4 and close and carry out off resonance adjustment load voltage V, and make V=V1, concrete principle as shown in Figure 3.This algorithmic state machine is divided into 8 states, is respectively the first state STT0, the second state STT1, third state STT2, the 4th state STT3, the 5th state STT4, the 6th state STT5, the 7th state STT6 and the 8th state STT7.Remember that 1 condition is V<V1, remember that 2 conditions are V>V1, remember that 3 conditions are that the state maintenance time of V<V1 or V>V1 exceedes threshold value T.When being in the first state STT0, the first K switch 1, second switch K2, the 3rd K switch 3 and the 4th K switch 4 are all opened, the first electric capacity C1, the second electric capacity C2, and the 3rd electric capacity C3 and the 4th electric capacity C4 is not connected in parallel in LC oscillating circuit.When being in the second state STT1 and third state STT2, first K switch 1 closes, and second switch K2, the 3rd K switch 3 and the 4th K switch 4 are all opened, and only have the first electric capacity C1 to be connected in parallel in LC oscillating circuit, second electric capacity C2, the 3rd electric capacity C3 and the 4th electric capacity C4 are not connected in parallel in LC oscillating circuit.When being in the 4th state STT3 and the 5th state STT4, first K switch 1 and second switch K2 close, 3rd K switch 3 and the 4th K switch 4 are opened, and only have the first electric capacity C1 and the second electric capacity C2 to be connected in parallel in LC oscillating circuit, the 3rd electric capacity C3 and the 4th electric capacity C4 is not connected in parallel in LC oscillating circuit.When being in the 6th state STT5 and the 7th state STT6, first K switch 1, second switch K2 and the 3rd K switch 3 close, 4th K switch 4 is opened, and the first electric capacity C1, the second electric capacity C2 and the 3rd electric capacity C3 are connected in parallel in LC oscillating circuit, and the 4th melts C4 and be not connected in parallel in LC oscillating circuit.When being in the 8th state STT7, the first K switch 1, second switch K2, the 3rd K switch 3 and the 4th K switch 4 are all closed, the first electric capacity C1, the second electric capacity C2, and the 3rd electric capacity C3 and the 4th melts C4 and is connected in parallel in LC oscillating circuit.When load voltage V is stabilized in V1, actual is a dynamic equilibrium.
Have employed receiving terminal and the energy adjustment method of the automatic off resonance of wireless charging in this invention, for in wireless charging system resonance standard, one-to-many manner provides the method for receiving terminal self-regulation energy, solve the energy collision problem that different receiving terminal proposes, can fast and stable load output voltage, in the wireless charging system of one-to-many, provide different energy for different receiving terminal, meet respective different demand.
In this description, the present invention is described with reference to its specific embodiment.But still can make various amendment and conversion obviously and not deviate from the spirit and scope of the present invention, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (5)
1. a receiving terminal for the automatic off resonance of wireless charging, described receiving terminal, for comprising in the wireless charging pattern of a transmitting terminal and at least one receiving terminal, is characterized in that, described receiving terminal comprises:
LC oscillation module, comprise receiving terminal coil (J1) and oscillating capacitance (C), the first end of described receiving coil (J1) is connected with the first end of described oscillating capacitance (C), the second end ground connection of described oscillating capacitance (C);
Half-wave rectification block, its input is connected with the second end of described receiving terminal coil (J1);
Load blocks, is connected with the output of described half-wave rectification block;
Off resonance adjustment module, comprises electric capacity and switch that array connects mutually, and each group the electric capacity of series connection and switch are all in parallel with described oscillating capacitance (C) mutually.
2. the receiving terminal of the automatic off resonance of wireless charging according to claim 1, it is characterized in that, described off resonance adjustment module comprises the first electric capacity (C1) and first switch (K1) of series connection mutually, second electric capacity (C2) of mutual series connection and second switch (K2), 3rd electric capacity (C3) of mutual series connection and the 3rd switch (K3), 4th electric capacity (C4) of mutual series connection and the 4th switch (K4), described off resonance adjustment module is by control first switch (K1), second switch (K2), the disconnection of the 3rd switch (K3) and the 4th switch (K4) and closedly carry out off resonance adjustment load voltage V, threshold voltage V1 is equaled to make load voltage V.
3. the receiving terminal of the automatic off resonance of wireless charging according to claim 2, is characterized in that, described half-wave rectification block comprises the first diode (D1), the second diode (D2) and the 5th electric capacity (C5); The AC signal that receiving terminal coil (J1) exports is transformed into direct current signal by the first diode (D1), the second diode (D2) and the 5th electric capacity (C5) by described half-wave rectification block.
4. realize a method for the automatic adjusting energy of receiving terminal in wireless charging based on any one of claims 1 to 3 receiving terminal, it is characterized in that, described method comprises the following steps:
(1) change of curtage in load is detected;
(2) if described curtage becomes large or diminishes, then the energy size of the receiving terminal described in being regulated by described off resonance adjustment module.
5. the method for the automatic adjusting energy of receiving terminal in wireless charging according to claim 4, it is characterized in that, described off resonance adjustment module comprises four groups of electric capacity and switch of mutually connecting, and four groups of described electric capacity of mutually connecting and switch comprise the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the 4th electric capacity (C4), the first switch (K1), second switch (K2), the 3rd switch (K3), the 4th switch (K4); Off resonance adjustment module is by the disconnection of control first switch (K1), second switch (K2), the 3rd switch (K3) and the 4th switch (K4) and closedly carry out off resonance and adjust load voltage V, equals threshold voltage V1 to make load voltage V.
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| CN201510863437.2A CN105490395A (en) | 2015-11-30 | 2015-11-30 | Automatically detuned receiving terminal in wireless charging and energy adjusting method |
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| CN201510863437.2A CN105490395A (en) | 2015-11-30 | 2015-11-30 | Automatically detuned receiving terminal in wireless charging and energy adjusting method |
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| CN106300520A (en) * | 2016-08-30 | 2017-01-04 | 歌尔科技有限公司 | The overvoltage crowbar of wireless charging receiving terminal and over-voltage protection method |
| CN106300699A (en) * | 2016-09-18 | 2017-01-04 | 青岛海信电器股份有限公司 | Wireless charging receiver, wireless charging system and charge control method thereof |
| CN117154959A (en) * | 2023-02-14 | 2023-12-01 | 荣耀终端有限公司 | Charging system and method |
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