CN208608788U - Wireless power transmission unit - Google Patents
Wireless power transmission unit Download PDFInfo
- Publication number
- CN208608788U CN208608788U CN201821473160.8U CN201821473160U CN208608788U CN 208608788 U CN208608788 U CN 208608788U CN 201821473160 U CN201821473160 U CN 201821473160U CN 208608788 U CN208608788 U CN 208608788U
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- impedance matching
- electrically connected
- wireless power
- transmission unit
- microcontroller
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Abstract
This announcement is related to a kind of wireless power transmission unit, comprising: a transmitting coil, for transferring energy to one of wireless power receiving unit receiving coil；One impedance matching network is electrically connected to the transmitting coil；Power amplifier is electrically connected to the impedance matching network and for one output voltage to be supplied to the transmitting coil through the impedance matching network；One optical relay is electrically connected to the impedance matching network, and the impedance matching network and the optical relay are for adjusting the impedance matching of the transmitting coil；And a microcontroller, it is electrically connected to the optical relay and for controlling the impedance matching that the optical relay adjusts the transmitting coil.
Description
Technical field
This announcement is related to wireless charging field, more particularly to a kind of wireless power transmission unit.
Background technique
Wireless charging is also referred to as non-contact inductive charge, by energy from power transmission list in the way of coil-induced
Member (Power Transmitting Unit；PTU) it is sent to power reception unit (Power Receiving Unit；PRU),
Power reception unit is installed in electronic device (device to be charged), and power reception unit receives after energy in electronic device
The battery in portion charges.Due to transmitting energy between electric power transfer unit and power reception unit in coil-induced mode,
Between the two without connection line, therefore wireless charging is more more convenient than wired charging.
Impedance matching is to determine one of whether good factor of wireless charging efficiency.In electric power transfer unit, power is put
Impedance matching network (Impedance Matching is equipped between big device (Power Amplifier, PA) and transmitting coil
Network, IMN), impedance matching network is used to power amplifier and transmitting coil carrying out impedance matching, improves charging whereby
Efficiency.In addition, electric power transfer unit further comprises the bidirectional metal oxide semiconductor for being electrically connected to impedance matching network
Field-effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET) or transformer,
The bidirectional metal oxide semiconductor field effect transistor or transformer of impedance matching network can fine tuning impedance matching, further increase
Charge efficiency.
However the circuit of above-mentioned bidirectional metal oxide semiconductor field effect transistor or transformer is complicated and is easy burn-up.Again
Person, the noise or generated noise for flowing through bidirectional metal oxide semiconductor field effect transistor or transformer easily flow into it
His component will cause other assemblies damage.
Therefore it needs to propose a kind of solution for above-mentioned problem of the prior art.
Utility model content
This announcement provides a kind of wireless power transmission unit, can solve the problems of the prior art.
The wireless power transmission unit of this announcement includes: a transmitting coil, is connect for transferring energy to a wireless power
Receive one of unit receiving coil；One impedance matching network is electrically connected to the transmitting coil；One power amplifier is electrically connected
To the impedance matching network and for one output voltage to be supplied to the transmitting coil through the impedance matching network；One smooth relay
Device is electrically connected to the impedance matching network, and the impedance matching network and the optical relay are for adjusting the resistance of the transmitting coil
Anti- matching；And a microcontroller, it is electrically connected to the optical relay and adjusts the transmitting coil for controlling the optical relay
Impedance matching.
In one embodiment, which further comprises a DC power source unit, the DC power supply list
Member is electrically connected to the power amplifier and the microcontroller, and the DC power source unit is for exporting a DC voltage to the power
Amplifier.
In one embodiment, which is used to control the big of the DC voltage that the DC power source unit exports
It is small.
In one embodiment, which further comprises a predrive unit, the predrive unit electricity
Property be connected to the power amplifier and for provide a predrive voltage give the power amplifier, it is pre- which receives this
Driving voltage simultaneously amplifies the predrive voltage, generates the output voltage.
In one embodiment, which further comprises a low-power bluetooth unit, and the low-power is blue
Bud unit is electrically connected to the microcontroller and for being communicated with the power reception unit.
In one embodiment, which further comprises a sensor group, which electrically connects
It is connected to the power amplifier and the microcontroller and the output voltage and an output electric current for sensing the power amplifier.
In one embodiment, which is further used for the noise that isolation flows to the microcontroller.
In the wireless power transmission unit of this announcement, the circuit structure of the optical relay is than existing bidirectional metal oxide half
The circuit structure of conductor field-effect transistor or transformer is simple.Furthermore the optical relay of this announcement can be straight by the microcontroller
Connect control.Finally, the optical relay of this announcement has good buffer action, the optical relay or the optical relay institute are flowed through
The noise of generation may not flow into the microcontroller.
For the above content of this announcement can be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate institute's accompanying drawings, makees
Detailed description are as follows:
Detailed description of the invention
Fig. 1 shows the block diagram of the wireless power transmission unit according to one embodiment of this announcement.
Fig. 2 shows the block diagram of the wireless power transmission unit according to another embodiment of this announcement.
Specific embodiment
Referring to Fig. 1, Fig. 1 shows the block diagram of the wireless power transmission unit 1 according to one embodiment of this announcement.
The wireless power transmission unit 1 include a transmitting coil 10, an impedance matching network 12, a power amplifier 14,
One optical relay (optical relay) 16 and a microcontroller (Micro Control Unit, MCU) 18.
The transmitting coil 10 is for transferring energy to one of a wireless power receiving unit 5 receiving coil 50.It is more clear
Say that the transmitting coil 10 is used to transfer energy to the reception line of the wireless power receiving unit 5 in a manner of magnetic resonance in ground
Circle 50 is to carry out wireless charging.
The impedance matching network 12 is electrically connected to the transmitting coil 10.
The power amplifier 14 is electrically connected to the impedance matching network 12 and will for penetrating the impedance matching network 12
One output voltage is supplied to the transmitting coil 10.
One of this announcement feature is that the optical relay 16 is arranged, which is electrically connected to the impedance matching net
Network 12.The impedance matching network 12 and the optical relay 16 are used to adjust the impedance matching of the transmitting coil 10.More particularly,
The impedance matching network 12 can adjust roughly the impedance matching of (coarse adjustment) transmitting coil 10, which can intense adjustment
The impedance matching of (fine tuning) transmitting coil 10.
Carry out fine tuning impedance matching phase using bidirectional metal oxide semiconductor field effect transistor or transformer with the prior art
Than the optical relay 16 of this announcement has following advantages.
Firstly, the circuit structure of the optical relay 16 of this announcement imitates crystal than existing bidirectional metal oxide semiconductor field
The circuit structure of pipe or transformer is simple.Furthermore the optical relay 16 of this announcement can be directly controlled by the microcontroller 18, existing
There are bidirectional metal oxide semiconductor field effect transistor or transformer that can not be directly controlled by the microcontroller 18.Finally, originally taking off
The optical relay 16 shown has good buffer action, and more particularly, which is further used for isolation and flows to
The noise of the microcontroller 18, flowing through noise caused by the optical relay 16 or the optical relay 16 may not flow into the micro-control
Device 18 processed, that is, the microcontroller 18 will not be impacted.
The microcontroller 18 is electrically connected to the optical relay 16 and for controlling 16 intense adjustment of the optical relay hair
The impedance matching of ray circle 10.
The wireless power transmission unit 1 further comprises a DC power source unit 20, which electrically connects
It is connected to the power amplifier 14 and the microcontroller 18, which puts for exporting a DC voltage to the power
Big device 14.The microcontroller 18 can be used for controlling the size for the DC voltage that the DC power source unit 20 exports.
The wireless power transmission unit 1 further comprises a predrive unit 22, which is electrically connected to
The power amplifier 14 simultaneously gives the power amplifier 14 for providing a predrive voltage, which receives the pre- drive
Dynamic voltage simultaneously amplifies the predrive voltage, generates the output voltage.
The wireless power transmission unit 1 further comprise a low-power bluetooth unit (Bluetooth Low Energy,
BLU) 24, which is electrically connected to the microcontroller 18 and for being led to the power reception unit 5
Letter.
Referring to Fig. 2, Fig. 2 shows the block diagram of the wireless power transmission unit 1 ' according to another embodiment of this announcement.
The difference of the wireless power transmission unit 1 of the wireless power transmission unit 1 ' and Fig. 1 of the present embodiment is this implementation
The wireless power transmission unit 1 ' of example further comprises a sensor group 26, which is electrically connected to the power amplification
Device 14, the DC power source unit 20 and the microcontroller 18 simultaneously are used to sense one of the power amplifier 14 output voltage and one
Export electric current.
The other assemblies of the present embodiment see the associated description of Fig. 1, do not add to repeat in this.
In the wireless power transmission unit of this announcement, the circuit structure of the optical relay is than existing bidirectional metal oxide half
The circuit structure of conductor field-effect transistor or transformer is simple.Furthermore the optical relay of this announcement can be straight by the microcontroller
Connect control.Finally, the optical relay of this announcement has good buffer action, the optical relay or the optical relay institute are flowed through
The noise of generation may not flow into the microcontroller.
Although above preferred embodiment is not to limit in conclusion this announcement is disclosed above with preferred embodiment
This announcement is made, those skilled in the art can make various changes and profit in the spirit and scope for not departing from this announcement
Decorations, therefore the protection scope of this announcement subjects to the scope of the claims.
Claims (7)
1. a kind of wireless power transmission unit characterized by comprising
One transmitting coil, for transferring energy to one of wireless power receiving unit receiving coil；
One impedance matching network is electrically connected to the transmitting coil；
One power amplifier is electrically connected to the impedance matching network and for penetrating the impedance matching network for an output voltage
It is supplied to the transmitting coil；
One optical relay is electrically connected to the impedance matching network, and the impedance matching network and the optical relay are for adjusting this
The impedance matching of transmitting coil；And
One microcontroller is electrically connected to the optical relay and for controlling the impedance that the optical relay adjusts the transmitting coil
Match.
2. wireless power transmission unit according to claim 1, which is characterized in that further comprise a DC power supply list
Member, the DC power source unit are electrically connected to the power amplifier and the microcontroller, and the DC power source unit is for exporting one
DC voltage gives the power amplifier.
3. wireless power transmission unit according to claim 2, which is characterized in that the microcontroller is for controlling the direct current
The size for the DC voltage that power supply unit exports.
4. wireless power transmission unit according to claim 1, which is characterized in that it further comprise a predrive unit,
The predrive unit is electrically connected to the power amplifier and gives the power amplifier for providing a predrive voltage, the power
Amplifier receives the predrive voltage and amplifies the predrive voltage, generates the output voltage.
5. wireless power transmission unit according to claim 1, which is characterized in that further comprise a low-power bluetooth list
Member, the low-power bluetooth unit are electrically connected to the microcontroller and for being communicated with the power reception unit.
6. wireless power transmission unit according to claim 1, which is characterized in that it further comprise a sensor group, it should
Sensor group is electrically connected to the power amplifier and the microcontroller and the output voltage for sensing the power amplifier
And one output electric current.
7. wireless power transmission unit according to claim 1, which is characterized in that the optical relay is further used for being isolated
Flow to the noise of the microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821473160.8U CN208608788U (en) | 2018-09-10 | 2018-09-10 | Wireless power transmission unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821473160.8U CN208608788U (en) | 2018-09-10 | 2018-09-10 | Wireless power transmission unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208608788U true CN208608788U (en) | 2019-03-15 |
Family
ID=65680374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821473160.8U Active CN208608788U (en) | 2018-09-10 | 2018-09-10 | Wireless power transmission unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208608788U (en) |
-
2018
- 2018-09-10 CN CN201821473160.8U patent/CN208608788U/en active Active
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