CN107658999A - A kind of non-contact electric energy transmission device and its control method - Google Patents
A kind of non-contact electric energy transmission device and its control method Download PDFInfo
- Publication number
- CN107658999A CN107658999A CN201610599803.2A CN201610599803A CN107658999A CN 107658999 A CN107658999 A CN 107658999A CN 201610599803 A CN201610599803 A CN 201610599803A CN 107658999 A CN107658999 A CN 107658999A
- Authority
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- China
- Prior art keywords
- electric energy
- receiving terminal
- direct current
- energy receiving
- impedance circuit
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
Abstract
The invention discloses a kind of non-contact electric energy transmission device and its control method, when in the space magnetic field that the electric energy receiving terminal is positioned over the electric energy transmitting terminal, impedance circuit is connected in electric energy receiving terminal, to enable the electric energy transmitting terminal easily to recognize the electric energy receiving terminal, the non-contact electric energy transmission device can rapidly enter normal operating conditions, afterwards, in order to reduce system power, the impedance circuit is broken from the electric energy receiving terminal after system enters normal operating conditions.The present invention increases electric energy receiving terminal by the sensitivity of electric energy transmitting terminal using impedance circuit, make it that the detection of electric energy receiving terminal is easy and system power dissipation is smaller.
Description
Technical field
The present invention relates to wireless technical field, more specifically to a kind of non-contact electric energy transmission device and its control
Method.
Background technology
Magnetic resonance type radio energy transmission system includes electric energy transmitting terminal and electric energy receiving terminal, as shown in figure 1, electric energy is launched
End includes DC-AC inverter, primary side resonant capacitance Cs, primary side transmitting coil Ls and MCU controller 1；Electric energy receiving terminal includes whole
Current circuit, secondary resonant capacitance Cd, secondary receiving coil Ld and MCU controller 2, MCU controllers 1 and MCU controllers 2, which pass through, to be led to
Believe that agreement such as Bluetooth protocol establishes communication connection.The electric energy of input is converted into space magnetic field to be transferred to by electric energy transmitting terminal
Electric energy receiving terminal.
But reception device is not necessarily present around electric energy transmitting terminal, for example, in charging process, reception device
Removed suddenly, at this moment, MCU controllers 1 need to control electric energy transmitting terminal to enter resting state, can so reduce loss, carry
Height treats engine efficiency；And another aspect reception device may be put into the charged area of electric energy transmitting terminal suddenly, at this moment electric energy is launched
End needs to activate at once, into energy transmission state, with such as power electronic equipment of the load to reception device.
When electric energy receiving terminal is positioned in effective charged area of electric energy transmitting terminal, electric energy transmitting terminal is by detecting electric energy
The increase of the impedance variations of transmitting coil or the input power of electric energy transmitting terminal identifies electric energy receiving terminal.Electric energy transmitting terminal is known
After not corresponding electric energy receiving terminal, MCU controllers 1 and MCU controllers 2 are established by bluetooth communication agreement and connected, MCU controllers
1 order MCU controllers, 2 enabled output output voltage Vout and output current Iout, the power supply of electron equipment.Powering simultaneously
Cheng Zhong, MCU controller 2 in real time by information such as BLE bluetooth communications feedback voltage, electric current, power to MCU controllers 1, so as to
Into in normal operating conditions.
But when the position that electric energy receiving terminal is in effective charged area but coupling is poor, transmitting coil impedance
Change or the change unobvious of input power, this variable quantity may be not enough to recognize electric energy receiving terminal；Or electric energy connects
When receiving end is Intelligent worn device (such as intelligent watch bracelet), due to its electric energy receiving coil very little, caused input power
Change is also very little, it is also possible to is not identified by electric energy transmitting terminal.
The content of the invention
In view of this, the present invention proposes non-contact electric energy transmission device and its control method, when reception device is put into electricity
In the space magnetic field of energy transmitting terminal, then impedance circuit is connected to increase the change of transmitting coil impedance, so that electric energy is launched
End can identify the access of electric energy receiving terminal, and system can enter normal operating conditions.
According to a kind of non-contact electric energy transmission device of the present invention, including electric energy transmitting terminal and electric energy receiving terminal, the electricity
Energy transmitting terminal receives inputing power and used with being converted into space magnetic field for the electric energy receiving terminal；
The electric energy receiving terminal couples the space magnetic field, output voltage supply load after rectified and voltage conversion；
Wherein, the electric energy receiving terminal includes impedance circuit, when the electric energy receiving terminal is positioned over the electric energy transmitting terminal
Space magnetic field in when, then the impedance circuit is connected in electric energy receiving terminal.
Further, after the electric energy transmitting terminal recognizes the electric energy receiving terminal, the transmitting non-contact electric energy dress
Put and enter normal operating conditions, the impedance circuit is broken from the electric energy receiving terminal.
Further, the electric energy receiving terminal includes electric energy receiving coil, rectification circuit and DC-DC voltage conversion
Device,
The rectification circuit and the direct current-direct current voltage converter are connected in turn after the electric energy receiving coil；
The impedance circuit is connected to after the direct current-direct current voltage converter,
Either the impedance circuit is connected to after the rectification circuit before the direct current-direct current voltage converter,
Also, the impedance circuit is in parallel with the rectification circuit or the direct current-direct current voltage converter.
Further, the impedance circuit includes the first resistor and first switch of series connection；
Further, the electric energy receiving terminal includes controller,
The controller detects the voltage of the rectification circuit output end, when the voltage for detecting the output end is more than threshold
During threshold voltage, then the controller controls the impedance circuit to be connected in the electric energy receiving terminal.
Preferably, when the impedance circuit is connected to after the direct current-direct current voltage converter,
The electric energy receiving terminal includes also including second switch, and the second switch is connected to the DC-DC voltage
Between converter and load.
According to a kind of control method of non-contact electric energy transmission device of the present invention, the control method includes following step
Suddenly：
Rectification circuit output end voltage in electric energy receiving terminal is detected in the non-contact electric energy transmission device, when the output
When terminal voltage is more than threshold voltage, then the controller of the electric energy receiving terminal is started working；
The controller control impedance circuit of the electric energy receiving terminal is connected in the electric energy receiving terminal；
After the electric energy transmitting terminal identification electric energy receiving terminal, the non-contact electric energy transmission device enters normal work shape
State；
The controller of the electric energy receiving terminal controls the impedance circuit to be disconnected from the electric energy receiving terminal.
Further, the electric energy receiving terminal includes electric energy receiving coil, rectification circuit and DC-DC voltage conversion
Device,
The rectification circuit and the direct current-direct current voltage converter are connected in turn after the electric energy receiving coil；
The impedance circuit is connected to after the direct current-direct current voltage converter,
Either the impedance circuit is connected to after the rectification circuit before the direct current-direct current voltage converter,
Also, the impedance circuit is in parallel with the rectification circuit or the direct current-direct current voltage converter.
Further, the impedance circuit includes the first resistor and first switch of series connection.
In summary, according to non-contact electric energy transmission device of the present invention and its control method, when the electric energy receiving terminal is put
When being placed in the space magnetic field of the electric energy transmitting terminal, impedance circuit is connected in electric energy receiving terminal, to cause the electric energy
Transmitting terminal can easily recognize the electric energy receiving terminal, and the non-contact electric energy transmission device can enter normal work shape
State, afterwards, in order to reduce system power, the impedance circuit is connect from the electric energy after system enters normal operating conditions
Receiving end is broken.
The non-contact electric energy transmission device and its control method of the present invention is enhancing electric energy transmitting terminal pair by impedance circuit
The identification of electric energy receiving terminal, due to the consumption power stability of resistance, therefore, the transmitting terminal of primary side is easily detected；And this
Invention can make ohmically electric current smaller, then on the switch of series connection with it with the resistance of reasonable selection impedance circuit
Loss it is also naturally smaller；Finally, it is of the invention impedance circuit can be connected to direct current-direct current voltage converter after, this
Sample, switch in impedance circuit is pressure-resistant to be reduced, and can select low pressure-resistant switch, save cost.
Brief description of the drawings
Fig. 1 show the circuit diagram of non-contact electric energy transmission device of the prior art；
Fig. 2 show the circuit diagram of the non-contact electric energy transmission device according to the present invention；
Fig. 3 show a kind of embodiment of Fig. 2 middle impedance circuits；
Fig. 4 is another connected mode according to the impedance circuit of the present invention；
Fig. 5 is the flow chart according to the control method of the non-contact electric energy transmission device of the present invention.
Embodiment
Some currently preferred embodiments of the present invention is described in detail below with reference to accompanying drawing, but the invention is not restricted to this.
With reference to figure 2, the circuit diagram according to non-contact electric energy transmission device of the invention is shown；It is as shown in Fig. 2 of the invention
In embodiment, the electric energy transmitting terminal with it is identical in the prior art, will not be repeated here, hereinafter will directly quote；Institute
Stating electric energy receiving terminal includes secondary receiving coil Ld, secondary resonant capacitance Cd and the rectification being connected in turn after resonant capacitance Cd
Circuit and D. C-D. C voltage converter (being abbreviated as DC-DC converter in such as Fig. 2).Likewise, electric energy transmitting terminal includes MCU
Controller 1, electric energy receiving terminal include MCU controllers 2, and MCU controllers 1 are controlling DC-AC inverter in electric energy transmitting terminal
Switch motion, MCU controllers 2 to control the switch motion of the rectification circuit of electric energy receiving terminal and DC-DC converter, control by MCU
Device 1 and MCU controllers 2 processed establish communication connection by communication protocol such as Bluetooth protocol.
In embodiment of the present invention, the electric energy receiving terminal also includes impedance circuit, when the electric energy receiving terminal is positioned over
When in the space magnetic field of the electric energy transmitting terminal, then the impedance circuit is connected in electric energy receiving terminal.Afterwards, electric energy is launched
Confirmation is identified to electric energy receiving terminal in end, when the electric energy transmitting terminal detects that the electric energy receiving terminal enters its space magnetic field
Afterwards, then the MCU controllers 1 of electric energy receiving terminal establish connection, MCU controls by the MCU controllers 2 of bluetooth communication and electric energy receiving terminal
Device 2 processed enables DC-DC converter output voltage and output current, gives load power electronic equipment.So, the non-contact electric energy
Transmitting device enters normal operating conditions.
Afterwards, when system is entered in normal work, MCU controllers 2 control the impedance circuit to be received from the electric energy
End is broken.Because if course of normal operation middle impedance circuit is additionally attached to electric energy receiving terminal, it will consume extra
Power, after electric energy receiving terminal output voltage is to load, MCU controllers 2 control impedance circuit to disconnect, and will not consume extra work(
Rate.
In embodiment described in Fig. 2, the impedance circuit is connected to after the DC-DC converter, people in the art
Member understands that the impedance circuit can also be connected to after the rectification circuit.Also, in the present embodiment, the impedance circuit
It is connected in parallel with the rectification circuit or the direct current-direct current voltage converter.
Increase electric energy receiving terminal by way of above-mentioned circuit can be seen that the embodiment of the present invention using impedance circuit
The sensitivity in transmitting terminal magnetic field is placed into, electric energy transmitting terminal can be allowed quickly to identify reception device, so as to which system is rapidly introduced into
Normal operating conditions.
With reference to a kind of implementation that figure 3 is Fig. 2 middle impedance circuits, in present embodiment, the impedance circuit is series connection
Resistance R1 and switch S1, the resistance R1 and switch S1 for implementing series connection be connected in parallel on the output end of the DC-DC converter.It is described whole
The output end voltage of current circuit is designated as Vrect, and the output end voltage of the DC-DC converter is designated as Vout.
When electric energy receiving terminal is placed in space magnetic field (the i.e. effective charged area) of electric energy transmitting terminal, electric energy receiving coil is opened
Beginning generates induced voltage, and the output end voltage Vrect of rectification circuit is begun to ramp up, when output end voltage Vrect is higher than a certain
Threshold value (such as Vrect of setting>When Vth), MCU controllers 2 obtain normal power supply, and MCU controllers 2 control DC-DC converter to open
Beginning normal work.But at this moment, electric energy transmitting terminal can not necessarily sense inserting for electric energy receiving terminal, therefore, at this moment, MCU controls
The controlling switch S1 of device 2 conductings processed, then resistance R1 is connected to the output end of DC-DC converter, and (V will be consumed on resistance R1out)2/
R1Power consumption, reasonable selection resistance R1 resistance, this power consumption by electric energy transmitting terminal also easily to be identified.So that electric energy
Transmitting terminal quickly activates, and into energy transmission state, electric energy transmission system can also rapidly enter normal operating conditions.
In present embodiment, the electric energy receiving terminal also includes switch S2, the switch S2 and is connected to the DC-DC conversion
Between device and electronic equipment.
After electric energy transmitting terminal, which recognizes electric energy receiving terminal, inserts, MCU controllers 1 start to control with MCU by bluetooth communication
Device 2 processed establishes connection.Because now DC-DC converter has begun to normal work, MCU controllers 2 need controlling switch S2 to lead
Pass to the power supply of electron equipment.Meanwhile MCU controllers 2 need controlling switch S1 to turn off, to reduce work(extra on resistance R1
Rate.
By the above embodiments as can be seen that the impedance circuit of the present invention increases receiving terminal by resistance consumption power
Sensitivity, to enable the transmitting terminal of primary side quickly to recognize inserting for electric energy receiving terminal, so as to quickly enter energy pass
Defeated state.It is can be seen that from above-mentioned process after secondary adds impedance circuit, the changed power of secondary is (Uout)2/ R, i.e.,
The change of power is fixed, and so, for primary side, its detection is more prone to.Secondly, in present embodiment, impedance electricity
Road, by setting rational resistance, makes ohmically electric current smaller, then to be gone here and there with it using the series connection of resistance and switch
Loss on the switch of connection is also naturally smaller；Finally, in this implementation by impedance circuit be connected to direct current-direct current voltage converter it
Afterwards, because the output voltage of direct current-direct current voltage converter is not too large, switch in impedance circuit is pressure-resistant to be reduced, can be with
Low pressure-resistant switch is selected, saves cost.
Another connected mode of the impedance circuit according to the present invention is shown with reference to figure 4, the impedance circuit includes electricity
R1 and switch S1 are hindered, the impedance circuit is connected to after the rectification circuit before the direct current-direct current voltage converter, and
And the impedance circuit is connected in parallel with the rectification circuit.
Similarly, its course of work is：When electric energy receiving terminal is placed in effective charged area of electric energy transmitting terminal, electric energy receives
Coil starts to generate induced voltage, when the output end voltage Vrect of rectification circuit is higher than threshold value (the i.e. Vrect of a certain setting>
When Vth), MCU controllers 2 obtain normal power supply, and now MCU controllers 2 control the switch S1 conductings in impedance circuit, then electricity
Resistance R1 is connected to the output end of rectification circuit, and (V will be consumed on resistance R1rect)2/R1Power consumption, reasonable selection resistance R1 resistance
Value, this power consumption by electric energy transmitting terminal also easily to be identified.So that electric energy transmitting terminal quickly activates, transmitted into energy
State, electric energy transmission system can also rapidly enter normal operating conditions.
It should be noted that above-described embodiment is all that electric energy receiving terminal is known by the change of primary side detection power
Not, skilled person will appreciate that, the impedance that ohmically loss can also be in the equivalent transmitting coil to electric energy, electric energy transmitting terminal
Can also be by detecting the change of transmitting coil impedance, to identify this electric energy receiving terminal.
By the above-mentioned elaboration to non-contact electric energy transmission device, technical scheme can be very good to realize
During holding state, when electric energy reception device is positioned over the charged area of transmitting terminal suddenly, pass through the setting of impedance circuit, transmitting terminal
Receiving terminal can easily be recognized.Also, by the reasonable selection of the impedance to impedance circuit, the damage of impedance circuit can make it that
Depletion is small.
Finally, the invention also provides a kind of control method of non-contact electric energy transmission device, comprise the following steps：
S501：Rectification circuit output end voltage in electric energy receiving terminal is detected in the non-contact electric energy transmission device, works as institute
When stating output end voltage and being more than threshold voltage, then the controller of the electric energy receiving terminal is started working；
S502：The controller control impedance circuit of the electric energy receiving terminal is connected in the electric energy receiving terminal；
S503：After the electric energy transmitting terminal identification electric energy receiving terminal, the non-contact electric energy transmission device enters normal work
Make state；
S504：The controller of the electric energy receiving terminal controls the impedance circuit to be disconnected from the electric energy receiving terminal.
Further, the electric energy receiving terminal includes electric energy receiving coil, rectification circuit and DC-DC voltage conversion
Device,
The rectification circuit and the direct current-direct current voltage converter are connected in turn after the electric energy receiving coil；
The impedance circuit is connected to after the direct current-direct current voltage converter,
Either the impedance circuit is connected to after the rectification circuit before the direct current-direct current voltage converter,
Also, the impedance circuit is in parallel with the rectification circuit or the direct current-direct current voltage converter.
Further, the impedance circuit includes the first resistor and first switch of series connection.
The non-contact electric energy transmission device according to the preferred embodiments of the present invention and its control method have been carried out in detail above
Description to the greatest extent, but circuit on the patent and beneficial effect should not be considered as being limited only to described above, disclosed reality
The present invention can be better understood from by applying example and accompanying drawing, and therefore, embodiment disclosed above and Figure of description content are in order to more
The good understanding present invention, present invention protection are not limited to limit the scope of the present disclosure, and those of ordinary skill in the art are to the present invention
The replacement of embodiment, change within protection scope of the present invention.
Claims (9)
1. a kind of non-contact electric energy transmission device, including electric energy transmitting terminal and electric energy receiving terminal, it is characterised in that
The electric energy transmitting terminal receives inputing power and used with being converted into space magnetic field for the electric energy receiving terminal；
The electric energy receiving terminal couples the space magnetic field, output voltage supply load after rectified and voltage conversion；
Wherein, the electric energy receiving terminal includes impedance circuit, when the electric energy receiving terminal is positioned over the sky of the electric energy transmitting terminal
Between in magnetic field when, then the impedance circuit is connected in electric energy receiving terminal.
2. non-contact electric energy transmission device according to claim 1, it is characterised in that when the electric energy transmitting terminal recognizes
After the electric energy receiving terminal, the non-contact electric energy transmission device enters normal operating conditions, by the impedance circuit from described
Electric energy receiving terminal is broken.
3. non-contact electric energy transmission device according to claim 1, it is characterised in that the electric energy receiving terminal includes electric energy
Receiving coil, rectification circuit and direct current-direct current voltage converter,
The rectification circuit and the direct current-direct current voltage converter are connected in turn after the electric energy receiving coil；
The impedance circuit is connected to after the direct current-direct current voltage converter,
Either the impedance circuit is connected to after the rectification circuit before the direct current-direct current voltage converter,
Also, the impedance circuit is in parallel with the rectification circuit or the direct current-direct current voltage converter.
4. non-contact electric energy transmission device according to claim 3, it is characterised in that the impedance circuit includes series connection
First resistor and first switch.
5. non-contact electric energy transmission device according to claim 3, it is characterised in that the electric energy receiving terminal includes control
Device,
The controller detects the voltage of the rectification circuit output end, when the voltage for detecting the output end is more than threshold value electricity
During pressure, then the controller controls the impedance circuit to be connected in the electric energy receiving terminal.
6. non-contact electric energy transmission device according to claim 3, it is characterised in that
When the impedance circuit is connected to after the direct current-direct current voltage converter,
The electric energy receiving terminal includes also including second switch, and the second switch is connected to the DC-DC voltage conversion
Between device and load.
7. a kind of control method of non-contact electric energy transmission device, it is characterised in that the control method comprises the following steps：
Rectification circuit output end voltage in electric energy receiving terminal is detected in the non-contact electric energy transmission device, when output end electricity
When pressure is more than threshold voltage, then the controller of the electric energy receiving terminal is started working；
The controller control impedance circuit of the electric energy receiving terminal is connected in the electric energy receiving terminal；
After the electric energy transmitting terminal identification electric energy receiving terminal, the non-contact electric energy transmission device enters normal operating conditions；
The controller of the electric energy receiving terminal controls the impedance circuit to be disconnected from the electric energy receiving terminal.
8. control method according to claim 7, it is characterised in that the electric energy receiving terminal include electric energy receiving coil,
Rectification circuit and direct current-direct current voltage converter,
The rectification circuit and the direct current-direct current voltage converter are connected in turn after the electric energy receiving coil；
The impedance circuit is connected to after the direct current-direct current voltage converter,
Either the impedance circuit is connected to after the rectification circuit before the direct current-direct current voltage converter,
Also, the impedance circuit is in parallel with the rectification circuit or the direct current-direct current voltage converter.
9. control method according to claim 8, it is characterised in that the impedance circuit include series connection first resistor and
First switch.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110179949.2A CN112928829A (en) | 2016-07-26 | 2016-07-26 | Non-contact electric energy transmission device and control method thereof |
| CN201610599803.2A CN107658999A (en) | 2016-07-26 | 2016-07-26 | A kind of non-contact electric energy transmission device and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610599803.2A CN107658999A (en) | 2016-07-26 | 2016-07-26 | A kind of non-contact electric energy transmission device and its control method |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110179949.2A Division CN112928829A (en) | 2016-07-26 | 2016-07-26 | Non-contact electric energy transmission device and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107658999A true CN107658999A (en) | 2018-02-02 |
Family
ID=61127205
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610599803.2A Pending CN107658999A (en) | 2016-07-26 | 2016-07-26 | A kind of non-contact electric energy transmission device and its control method |
| CN202110179949.2A Pending CN112928829A (en) | 2016-07-26 | 2016-07-26 | Non-contact electric energy transmission device and control method thereof |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110179949.2A Pending CN112928829A (en) | 2016-07-26 | 2016-07-26 | Non-contact electric energy transmission device and control method thereof |
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| CN (2) | CN107658999A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020215849A1 (en) * | 2019-04-26 | 2020-10-29 | 华为技术有限公司 | Wireless charging method, receiver, terminal device, and charger |
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| CN102292921A (en) * | 2009-01-22 | 2011-12-21 | 高通股份有限公司 | impedance change detection in wireless power transmission |
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| WO2020215849A1 (en) * | 2019-04-26 | 2020-10-29 | 华为技术有限公司 | Wireless charging method, receiver, terminal device, and charger |
| US11699922B2 (en) | 2019-04-26 | 2023-07-11 | Huawei Digital Power Technologies Co., Ltd. | Wireless charging method, receiver, terminal device, and charger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112928829A (en) | 2021-06-08 |
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Application publication date: 20180202 |