CN108808879A - wireless power transmitter - Google Patents
wireless power transmitter Download PDFInfo
- Publication number
- CN108808879A CN108808879A CN201810628047.0A CN201810628047A CN108808879A CN 108808879 A CN108808879 A CN 108808879A CN 201810628047 A CN201810628047 A CN 201810628047A CN 108808879 A CN108808879 A CN 108808879A
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- voltage
- power
- signal
- voltages
- output
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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
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
The present invention provides a kind of wireless power transmitter, including：DC input voitage is converted to the power transmission module of the first alternating voltage；The power transmitter coil of AC magnetic flux is generated according to the first AC voltages；AC magnetic flux is received to generate the power receiver coil of the 2nd AC voltages；The 2nd AC voltages are converted to the power receiver of output dc voltage；Export the oscillating circuit of AC signals；And voltage output module, the size of output voltage of the module based on power receiver generate the supply voltage of oscillating circuit.
Description
Background technology
The wireless power transmission technology of power cord or cable power supply is not used strikingly now.Wireless power passes
Transferring technology allows wireless power transmission from supply side to power side, and it is anticipated that various products will be applied to, including
Transportation machines, household electrical appliance, electronic equipment, wireless telecom equipment, toy and the industrial appliance of such as electric car and electric vehicle.
For the output state of the stable power receiving side in such wireless power transmission technology, need to connect electric power
Receive the power supply coil that the output information of side feeds back to supply side and controls the electric power to be fed to according to output information.
Invention content
Present invention has been made in view of the above problems for invention content, and its object is to reduce power transmission to pass with signal
Influencing each other between defeated, and stable power transmission and signal transmission are realized simultaneously.
To solve the above problems, the present invention provides a kind of wireless power transmitter, including：Power transmission module, by direct current
Input voltage is converted to the first alternating voltage；Power transmitter coil generates AC magnetic flux according to the first AC voltages；Electric power connects
Device coil is received, receives AC magnetic flux to generate the 2nd AC voltages；The 2nd AC voltages are converted to output by power receiver
D/C voltage；Oscillating circuit exports AC signals；And voltage output module, the big abortion of the output voltage based on power receiver
The supply voltage of raw oscillating circuit.
Description of the drawings
In conjunction with attached drawing with reference to description and claims, advantages and features of the invention will become more in more detail below
It is good to understand, wherein the identical symbol logo of identical element, and wherein：
Fig. 1 is the block diagram for the configuration for schematically showing wireless power transmitter according to the ... of the embodiment of the present invention.
Fig. 2 is the exemplary block diagram for the circuit configuration for being shown specifically power transmitting unit shown in Fig. 1.
Fig. 3 is the exemplary block diagram for the circuit configuration for being shown specifically power reception unit shown in Fig. 1.
Specific implementation mode
The best mode embodiment of the present invention is presented according to its preferred embodiment.However, the present invention is not limited to described realities
Example is applied, and it would be recognized by those skilled in the art that without departing from the basic conception of the present invention, of the invention is permitted
More other embodiments are possible, and any this accommodation will also fall into the scope of the present invention.It is envisioned that the present invention
Other types and construction can be easily incorporated in the teachings of the present invention, and for clear and disclosed purpose rather than
For the limitation of range, a specific construction is only shown and described.
"one" does not indicate that the limitation of quantity to term herein, but indicates the item for having mentioned by one or more
Mesh.
Fig. 1 is the block diagram for the configuration for schematically showing wireless power transmitter according to the ... of the embodiment of the present invention.
As shown in Figure 1, wireless power transmitter 1 is made of the combination of power transmitting unit 1A and power reception unit 1B.
Wireless power transmitter 1 is configured as wirelessly sending electric power from power transmitting unit 1A to power reception unit 1B.
Power transmitting unit 1A includes electric power sending module 110, power transmitter coil 6,9 and of signal receiver coil
Control module 150.DC input voltages are converted into such as 100kHz and exported by electric power sending module 110.Power transmitter coil 6
AC magnetic flux is generated using AC voltages.Signal receiver coil 9 receives the AC signals sent from power reception unit 1B.Control
The AC signal that module 150 is received according to signal receiving coil 9 controls the alternating current exported from electric power sending module 110
Pressure.
Power reception unit 1B includes power receiver coil 7, power receiver 120, signal output module 140 and letter
Number transmitter coils 8.The AC magnetic flux generated by power transmitter coil 6 is received generation one by power receiver coil 7
Alternating voltage.The AC voltages generated in power receiver coil 7 are converted into the DC electricity of such as 24V by power receiver 120
Pressure.Signal output module 140 generates the AC signals 120 of the size of the output voltage or output current that indicate power receiver.Letter
AC signal is sent to signal receiving coil 9 by number transmit coil 8.The output voltage of power receiver 120 is fed into for example
Load 130.
Electric power sending module 110 includes power supply unit 111 and voltage conversion unit 112.Power supply unit 111 inputs DC
Voltage is converted to scheduled D/C voltage.Voltage conversion unit 112 is converted to the predetermined D/C voltage exported from power supply unit 111
Such as the AC voltages of 100kHz.Control module 150 is controlled according to the AC signal received by signal receiving coil 9 from electricity
The size for the predetermined direct current voltage that source unit 111 exports, the alternating voltage exported from electric power sending module 110 to control.Cause
This, the AC voltages exported from voltage conversion unit 112 do not change.That is, as exporting from electric power sending module 110
The electric power transmission frequency of the frequency of AC voltages can be fixed.
Signal output module 140 includes oscillating circuit 141 and voltage output module 142.Oscillating circuit 141 exports for example
The AC signals of 10MHz.Voltage output module 142 is generated based on the size of the output voltage of power receiver 120 for vibrating
The supply voltage of circuit 141.Voltage output module 142 is according between power supply output module 142 and power supply output module 142
Difference controls the supply voltage of oscillating circuit 141.The output voltage and desired value of power receiver 120.
As described above, the output from power reception unit 1B passes through 9 quilt of signal transmit coil 8 and signal receiving coil
Power transmitting unit 1A is fed back to, is remained unchanged so as to control the output power from power reception unit 1B.
The combination of power transmitter coil 6 and power receiver coil 7 constitutes electric power and sends transformer Tp, and signal
The combination of transmitter coils 8 and signal receiver coil 9 constitutes signal and sends transformer T.Sub.S. when signal transmission transformer
T.s and power transmission transformer Tp it is coaxially arranged in the same housing or it is very close to each other when, in order to minimize and improve
The performance of wireless power transmitter 1, one in power transmission transformer Tp and signal transmission transformer Ts may influence wherein
Another flux to reduce signal transmission quality or power transmission quality.Therefore, in the present embodiment, by by signal
Transmission frequency is set as ten times of power transmission frequency or more, the reduction that influences each other between power transmission and signal transmission.
Fig. 2 is the exemplary block diagram of the circuit configuration of detailed diagram power transmitting unit 1A.
As shown, as shown in Fig. 2, the electric power supply unit 111 on electric power transfer unit 1A is nonisulated decompression conversion
Device and include one first switching element SW1 100 being connected in series in a pair of of the balanced line extended from DC voltage source,
It is parallel-connected to the second switch element SW2 of balanced line, power supply unit switch element control section 113, control first and the
The ON OFF state .2 of two switch element SW1 and SW.sub is parallel-connected to the first and second switch element SW1 and SW2
Prime feed-through capacitor C1 and the low-pass filter that is made of series reactor L in the first and second switch element SW1
Shunt capacitor C2 is provided with the rear class of SW2.Power supply unit switch element control section 113 is according to from control module 150
Voltage is controlled to control the on/off period of the first and second switch element SW1 and SW2, to control first and second
The level DC voltages of switch element SW1 and SW2 are supplied to rear class voltage conversion unit 112.
Voltage conversion unit 112 includes the bridge circuit and electricity being made of to the 6th switch element SW3 to SW6 third
Converting unit switch element control section 114, the open/close state the 6th of control third to the 6th switch element is pressed to switch member
Part SW3 to SW6.The predetermined D/C voltage supplied from power supply unit 111 is converted into the AC voltages of such as 100kHz, then inputs
To power transmitter coil 6.
Control module 150 includes filter 151, rectifier/smoothing circuit 152 and variable bleeder circuit 153.It is connect by signal
The noise remove for receiving the filtered device of AC signals that device coil 9 receives 151, is then rectified and is rectified smooth circuit 152
It is input to variable bleeder circuit 153 after smooth.The string that variable bleeder circuit 153 is formed by connecting by resistance R1 and variable resistance R2
Connection circuit constitutes parallel balanced line.Output-voltage levels of the size of variable resistance R2 based on rectifier/smoothing circuit 152
And change.When the output-voltage levels of rectifier/smoothing circuit 152 are high, the resistance value sub.2 of variable resistance R becomes larger, to
Power supply unit switch element control unit 113 supplies larger control voltage.On the other hand, in the output of rectifier smoothing circuit 152
In the case of voltage level is lower, variable resistance R2 becomes smaller, to be provided to power supply unit switch element control section 113
Small control voltage.Power supply unit switch element control section 113 controls switch based on control voltage level, to control
It is supplied to the size of the predetermined D/C voltage of voltage conversion unit 112.
Fig. 3 is the block diagram of an example of the circuit structure for being shown specifically power receiving section 1B.
The power reception unit 1B of Fig. 1 includes：Fig. 3 is different from the power reception unit 1B of Fig. 1.With the difference of Fig. 3
It is, voltage output module 142 is connected to the output line of power receiver 120 by transformer T and diode D2, and shakes
The supply voltage for swinging circuit 141 is based on output current.It is obtained from the voltage for being applied to the resistance R6 for being connected to transformer T and work(
The proportional voltage of the size of the output current of rate receiver 120, and the control of voltage output module 142 with power according to connecing
The difference between the proportional voltage and desired value V.sub.0 of size of the output current of device 120 is received to determine oscillating circuit
141 supply voltage V1.It is carried out as a result, exporting the output current level based on power receiver 120 from oscillating circuit 141
The AC signals of the 100MHz of amplitude modulation.
In the present embodiment, the frequency for the AC voltages of power transmission is 100kHz, and is used for the AC letters of signal transmission
Number frequency be the frequency as the AC voltages for power transmission 100 times of 10MHz.AC signals for signal transmission
Frequency be preferably more than 10 times of frequency of the AC voltages for power transmission.When the frequency of the AC signals for signal transmission
When rate is more than 10 times of the frequency of the AC voltages for power transmission, the harmonic wave of the AC voltages for power transmission can be prevented
Make signal output waveform distortion as the noise signal for AC, so as to avoid between power transmission side and signal transmission side
Interference, ensure that the transmission quality of AC signal.
Only with constant hunting of frequency, the amplitude of the output signal of oscillating circuit 141 is shaken oscillating circuit 141 by increase and decrease
It swings the supply voltage V1 of circuit 141 and is modulated.That is, by the amplitude of carrier signal generated by oscillating circuit 141 modulate come
The control information of the size of the output voltage of superposition instruction current collector 120.It, can be by changing supply voltage by the configuration
It itself easily realizes amplitude modulation oscillator circuit 141 and signal transmission is realized with simple (number of components of reduction),
Inexpensive and highly reliable configuration.
As described above, can be by being to hand over by the set of frequency of AC signals according to the wireless power transmitter 1 of the present embodiment
Ten times or more of the frequency of galvanic electricity pressure send influencing each other between signal transmission to reduce electric power.In addition, by electric body 120
Output voltage size be converted into AC signal amplitude size, therefore the noise frequency ingredient of frequency influence (from
The frequency of the alternating voltage of power transmission output can inhibit the power transmission consistent with the frequency of AC signal, so can prevent
Power control is bad.This allows influencing each other between power transmission and signal transmission to be reduced, stable to realize simultaneously
Power transmission and signal transmission.In addition, receiving the electric power transfer unit 1A of AC signal by increasing and decreasing supply of electric power list
The output voltage of member 111 adjusts the electric power of power reception unit 1B to be transferred to, therefore need not execute and be converted for voltage
Complex control unit 112.In addition, in the wireless power transmitter 1 according to the present embodiment, signal sends the frequency of AC signals
The frequency that rate and electric power send AC voltages can respectively be fixed to specific frequency, and thus send can be into signal transmission for electric power
One step reduces.
It is readily apparent that the present invention is not limited to the above embodiments, but the scope of the present invention and essence can not departed from
It modifies and changes in the case of god.
For example, in the above-described embodiments, using nonisulated buck converter as power supply unit；However, the present invention is unlimited
In this, and various types of power supply units can be used.However, low cost can be obtained using nonisulated buck converter
With efficient power supply unit.
In addition, in the above-described embodiments, power transmission frequency is arranged to 100kHz, and signal transmission frequencies are
10MHz；However, the present invention is not limited to this combinations, as long as and signal transmission frequencies be more than ten times of power transmission frequency,
Various combinations are exactly possible.
As described above, according to the present embodiment, a kind of wireless power transmitter is provided, including：Electric power sending module, will
DC input voitage is converted into alternating voltage and exports obtained alternating voltage；Electric power transmit coil generates AC magnetism all
Alternating voltage receiving portion alternating magnetic flux is crossed to generate the power receiver coil of alternating voltage, by power receiver coil
The alternating voltage of generation is converted to the power receiver of DC voltage, and the signal output module for generating AC signal indicates electric power
The size of the output voltage of receiver；The AC signal generated by signal output module is sent to signal by signal transmit coil
Sending side；Signal receiving coil receives the AC signal sent from signal transmit coil；And control module, according to by believing
AC signals that number receiver coil receives control the AC voltages exported from electric power sending module.The frequency of AC signal is work(
Ten times or more of the alternating current voltage frequency of rate transmitting module output.Signal output module is by the output voltage of power receiver
Size is converted to the size of the amplitude of AC signal.
According to this embodiment, it can reduce an influence to another in power transmission and signal transmission.In addition,
The AC signal of amplitude modulation is carried out using the size based on the output voltage of power receiver, so that frequency is made an uproar
(frequency of the alternating voltage exported from power transmission can inhibit the transmission of electricity consistent with the frequency of AC signal to acoustic frequency ingredient.
It is thereby possible to reduce influencing each other between power transmission and signal transmission, to realize that stable power transmission and signal pass
It is defeated.
In this embodiment it is preferred that signal output module includes exporting the oscillating circuit of AC signal and based on defeated
The voltage output module and voltage output module for going out the supply voltage of the amplitude generation oscillating circuit of voltage are received according to power
Difference between the output voltage and desired value of device controls supply voltage.Using this configuration, exported from signal output module
The frequencies of AC signals do not change, and signal sends the frequencies of AC signals can be fixed to specific frequency so that electric power is sent out
Send influencing each other and can reduce between signal transmission.Therefore, it can realize that stable electric power passes simultaneously with simple circuit
Defeated and signal transmission.
In this embodiment it is preferred that electric power sending module includes that DC input voltages are converted into predetermined D/C voltage
Power supply unit and by the predetermined D/C voltage exported from power supply unit be converted into AC voltages described in the voltage conversion unit of voltage and
The control module according to the AC signals received by the signal receiving coil to control by exporting from said supply unit
The predetermined D/C voltage controls the AC voltages exported from the electric power sending module.The friendship exported as a result, from voltage converter section
The frequency of galvanic electricity pressure will not change, can be solid by the frequency of power transmission frequency (frequency of the alternating voltage exported from power transmission module)
It is set to specific frequency, it is possible to further decrease influencing each other between power transmission and signal transmission.
In the present embodiment, power supply unit is preferably nonisulated buck converter.It can be with using nonisulated buck converter
Obtain low cost and efficient power supply unit.
According to this embodiment, it can provide a kind of wireless power transmitter, electric power can be reduced and sent and signal transmission
Between influence each other and realize that stable electric power is sent and signal is sent simultaneously.
Although it have been described that being presently believed to be the content of the preferred embodiment of the present invention, it should be understood that,
Various modifications can be made to it, and appended claims are intended to cover all such modifications, such as autumn the present invention's
In true spirit and range.
The foregoing description of specific embodiments of the present invention is had been presented for for the purpose of illustration and description.They are not
It is intended to exhaustion or the present invention and application method is limited to disclosed precise forms.Obviously, according to the above instruction, many is repaiied
Change and variation is possible.Selection and description embodiment be in order to best explain the principle and its practical application of the present invention, and
Thus enable others skilled in the art most preferably using the present invention and with being suitable for expected special-purpose
The various embodiments of various modifications.It should be understood that without departing substantially from the present invention claim spirit or scope the case where
Under, it may be considered that it is various etc..
Claims (8)
1. a kind of wireless power transmitter, including：
DC input voltages are converted into the first AC voltages by electric power sending module；
Power transmitter coil generates AC magnetic flux according to the first AC voltages；
Power receiver coil receives AC magnetic flux to generate the 2nd AC voltages；
The 2nd AC voltages are converted to output dc voltage by power receiver；
Oscillating circuit exports AC signals；And voltage output module, the size of the output voltage based on power receiver generate oscillation
The supply voltage of circuit.
2. wireless power transmitter according to claim 1, wherein the power transmission module includes：
DC input voltages are converted to scheduled D/C voltage by power supply unit；
Predetermined D/C voltage is converted to the first AC voltages by voltage conversion unit, and wherein control module is by controlling from power supply unit
The predetermined D/C voltage of output controls the first AC voltages.
3. wireless power transmitter according to claim 2 turns wherein the electric power supply unit includes nonisulated decompression
Parallel operation.
4. wireless power transmitter according to claim 1, further includes：
Signal output module generates the AC signal of the size for the output voltage for indicating power receiver；
Signal transmission coil transmits the AC signal of signal output module；
Signal receiver coil receives AC signals from sender unit coil；
Control module controls the first alternating voltage according to the AC signal that signal receiving coil receives.
5. wireless power transmitter according to claim 1, wherein
The frequency of AC signal is ten times of the frequency of the first alternating voltage or more,
Wherein the size of the output voltage of power receiver is converted to the size of the amplitude of AC signals by signal output module.
6. wireless power transmitter according to claim 1, wherein
Voltage output module controls supply voltage according to the difference between the output voltage of power receiver and desired value.
7. wireless power transmitter according to claim 1, wherein the electric power sending module includes：Power supply unit,
The DC input voltages are converted into scheduled D/C voltage；And voltage conversion unit, the predetermined D/C voltage is converted into institute
State the first AC voltages, and the wherein described control module by control the predetermined D/C voltage exported from the power supply unit come
Control the first AC voltages.
8. wireless power transmitter according to claim 7, wherein the power supply unit includes nonisulated buck converter.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810628047.0A CN108808879A (en) | 2018-06-19 | 2018-06-19 | wireless power transmitter |
| ZA2018/04794A ZA201804794B (en) | 2018-06-19 | 2018-07-18 | Wireless power transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810628047.0A CN108808879A (en) | 2018-06-19 | 2018-06-19 | wireless power transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108808879A true CN108808879A (en) | 2018-11-13 |
Family
ID=64083447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810628047.0A Withdrawn CN108808879A (en) | 2018-06-19 | 2018-06-19 | wireless power transmitter |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108808879A (en) |
| ZA (1) | ZA201804794B (en) |
-
2018
- 2018-06-19 CN CN201810628047.0A patent/CN108808879A/en not_active Withdrawn
- 2018-07-18 ZA ZA2018/04794A patent/ZA201804794B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ZA201804794B (en) | 2019-03-27 |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181113 |
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| WW01 | Invention patent application withdrawn after publication |