CN105811546B - WPT charging equipments based on electromagnetic coupling and method - Google Patents
WPT charging equipments based on electromagnetic coupling and method Download PDFInfo
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- CN105811546B CN105811546B CN201610154028.XA CN201610154028A CN105811546B CN 105811546 B CN105811546 B CN 105811546B CN 201610154028 A CN201610154028 A CN 201610154028A CN 105811546 B CN105811546 B CN 105811546B
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- 238000010168 coupling process Methods 0.000 title claims abstract description 18
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- 238000000034 method Methods 0.000 title claims description 18
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- H02J7/025—
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Abstract
The invention discloses a kind of WPT charging equipments based on electromagnetic coupling, the input terminal of its Switching Power Supply is for connecting mains supply, the input terminal of high-frequency inverter is used for the output end of connecting valve power supply, the input terminal of the output end connection power amplifier of high-frequency inverter, the signal input part of the output end connection resonance ejection device of power amplifier, the signal output end of resonance ejection device is used for export resonance magnetic field signal, the signal input part of resonance receiver is for receiving oscillating magnetic field signal, the signal input part of the signal output end connection rectifying pressurizer of resonance receiver, the signal output end of rectifying pressurizer is used to connect the charging end of load, the signal input part of current controller is used to connect the charge current sample end of load, the control terminal of the control signal output connecting valve power supply of current controller.The present invention has the advantages that charge efficiency is high, security and stability is good, production cost is low, long transmission distance.
Description
Technical field
The present invention relates to mobile phone charging technique fields, in particular to a kind of WPT (Wireless based on electromagnetic coupling
Charging technology, wireless charging technology) charging equipment and method.
Background technology
With the progress of Science ＆ Society, traditional charging modes can no longer meet requirement of the people to mobile charging,
Problems faced has at present：Being limited to by mobile phone model and charging interface, charging equipment is difficult to uniformly, poor compatibility,
The mode of tradition charging is also had a greatly reduced quality on using portable degree, and secondly, the transmission range of wireless charging device is short at present, efficiency
Low, safety is poor.Therefore WPT wireless charging technologies just come into being, as its name suggests, be exactly not by plain conductor and its
It under conditions of his physical connection, transmits by media implementation electric energy of air, charges for equipment.Wireless charging technology at this stage
There are two types of main realization methods, respectively electromagnetic wave type and induction.The transmission method energy attenuation of electromagnetic wave type is lost
Seriously, induction transmission range it is too short (such as：The transmission of mobile phone wireless charging equipment based on QI standards on the market at present
Distance is less than 3mm).
Invention content
Present invention aim to provide a kind of WPT charging equipments and method based on electromagnetic coupling, the charging equipment
And method is more traditional has that charge efficiency is high, security and stability is good, production cost is low, passes based on QI standard radio charging modes
The remote advantage of defeated distance.
In order to achieve this, the WPT charging equipments based on electromagnetic coupling designed by the present invention, it is characterised in that：It is wrapped
Include Switching Power Supply, high-frequency inverter, power amplifier, resonance ejection device, resonance receiver, rectifying pressurizer and current control
Device, wherein the input terminal of the Switching Power Supply is for connecting mains supply, and the input terminal of high-frequency inverter is for connecting valve electricity
The output end in source, the input terminal of the output end connection power amplifier of high-frequency inverter, the output end connection of power amplifier are humorous
Shake the signal input part of transmitter, and the signal output end of resonance ejection device is used for export resonance magnetic field signal, resonance receiver
Signal input part is for receiving oscillating magnetic field signal, the signal input of the signal output end connection rectifying pressurizer of resonance receiver
End, the signal output end of rectifying pressurizer are used to connect the charging end of load, and the signal input part of current controller is for connecting
The charge current sample end of load, the control terminal of the control signal output connecting valve power supply of current controller.
A method of it is charged using the above-mentioned WPT charging equipments based on electromagnetic coupling, which is characterized in that it includes
Following steps：
Step 1：Industrial-frequency alternating current is converted to direct current by Switching Power Supply；
Step 2：Switching Power Supply is by DC power transmission to high-frequency inverter, high-frequency inverter and power amplifier by direct current
Be converted to high frequency ac signal；
Step 3：High frequency ac signal is transferred to resonance ejection device by power amplifier, and resonance ejection device is according to high-frequency ac
Signal emits oscillating magnetic field signal；
Step 4：Resonance receiver receives the oscillating magnetic field signal of resonance ejection device transmitting, obtains receiving terminal high-frequency ac letter
Number；
Step 5：Receiving terminal high frequency ac signal is sent to rectifying pressurizer and carries out rectifying and voltage-stabilizing processing by resonance receiver
Obtain charging direct current；
Step 6：Rectifying pressurizer charges to load with direct current using above-mentioned charging；
Step 7：While charging to load, current controller acquires the charging current of load in real time, works as electric current
When the charging current that controller acquires load in real time is more than 1A, current controller, which controls Switching Power Supply, reduces output voltage, realizes
Closed-loop control makes charging current stablize in 1A；When the charging current that current controller acquires load in real time is less than 1A, electric current control
Device control Switching Power Supply processed improves output voltage, realizes closed-loop control, charging current is made to stablize in 1A, when current controller is real-time
Current controller is not adjusted Switching Power Supply when the charging current of acquisition load is equal to 1A, and Switching Power Supply is transported by current state
Row.
The above-mentioned charging equipment that the present invention designs, in EMR electromagnetic resonance manifold type wireless power transmission, electromagnetic field is with transmission
Distance increases and decays rapidly, captures the electromagnetic field with range attenuation using the circuit that resonance coupling occurs, i.e., ought be transmitted back to
When resonance occurs for road and reception circuit, so that most of energy is transmitted to by launching circuit and receive circuit, biography has been significantly increased
Defeated efficiency.The present invention has charge efficiency height, security and stability good, raw compared to more traditional based on QI standard radio charging modes
The advantages of producing at low cost, long transmission distance.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Wherein, 1-high-frequency inverter, 2-power amplifiers, 3-resonance ejection devices, 4-resonance receivers, 5-rectifications
Voltage-stablizer, 6-current controllers, 7-loads, 8-Switching Power Supplies.
Specific implementation mode
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail：
WPT charging equipments based on electromagnetic coupling as described in Figure 1, it includes Switching Power Supply 8, high-frequency inverter 1, power
Amplifier 2, resonance ejection device 3, resonance receiver 4, rectifying pressurizer 5 and current controller 6, wherein the Switching Power Supply 8
Input terminal is used for the output end of connecting valve power supply 8, high-frequency inversion for connecting mains supply, the input terminal of high-frequency inverter 1
The signal of the input terminal of the output end connection power amplifier 2 of device 1, the output end connection resonance ejection device 3 of power amplifier 2 is defeated
Enter end, the signal output end of resonance ejection device 3 is used for export resonance magnetic field signal, and the signal input part of resonance receiver 4 is used for
Receive oscillating magnetic field signal, the signal input part of the signal output end connection rectifying pressurizer 5 of resonance receiver 4, rectifying and voltage-stabilizing
The signal output end of device 5 is used to connect the charging end of load 7, and the signal input part of current controller 6 is used to connect filling for load 7
Electric current sampling port, the control terminal of the control signal output connecting valve power supply 8 of current controller 6.
In above-mentioned technical proposal, the Switching Power Supply 8 for realizing 220V, 50Hz industrial-frequency alternating current to 24V direct currents
Conversion.
In above-mentioned technical proposal, the power amplifier 2 is made of push-pull type power amplification circuit, and power amplifier 2 is used
In exporting high-frequency high-power signal into the transmitting coil of resonance ejection device 3.
In above-mentioned technical proposal, the resonance ejection device 3 is the resonant tank being made of inductance coil and capacitance.
In above-mentioned technical proposal, the high-frequency inverter 1 and power amplifier 2 are for realizing 24V direct currents to peak-to-peak value
For 110V, frequency is the conversion of the high frequency ac signal of 178KHZ.High-frequency inverter 1 is by XKT801 chips and associated driver circuitry
Composition.The power amplifier 2 is made of push-pull type power amplification circuit, and high-frequency high-power signal is exported to transmitting coil
In；
In above-mentioned technical proposal, the spacing range between the resonance ejection device 3 and resonance receiver 4 is 10~60mm.
This distance is optimum distance range, this distance can take into account efficiency of transmission and wireless charging distance.
In above-mentioned technical proposal, 4 working frequency having the same of the resonance ejection device 3 and resonance receiver.
In above-mentioned technical proposal, the rectifying pressurizer 5 is made of switching diode and LM2596 voltage stabilizing chips, wherein institute
Original paper characteristic is needed to must satisfy the transmission requirement of high-frequency signal.
In above-mentioned technical proposal, efficiency=receiving terminal coil power/transmitting terminal coil power=4.5/10.1=between coil
45%；Receiving terminal intermodule efficiency=output power/receiving terminal coil power=3.765/4.5=83.6%.
A method of it is charged using the above-mentioned WPT charging equipments based on electromagnetic coupling, which is characterized in that it includes
Following steps：
Step 1：Industrial-frequency alternating current is converted to direct current by Switching Power Supply 8；
Step 2：For Switching Power Supply 8 by DC power transmission to high-frequency inverter 1, high-frequency inverter 1 and power amplifier 2 will be straight
Galvanic electricity is converted to high frequency ac signal；
Step 3：High frequency ac signal is transferred to resonance ejection device 3 by power amplifier 2, and resonance ejection device 3 is according to high frequency
AC signal emits oscillating magnetic field signal；
Step 4：Resonance receiver 4 receives the oscillating magnetic field signal of 3 transmitting of resonance ejection device, obtains receiving terminal high-frequency ac
Signal (receives resonance circle and obtains maximum field capacity usage ratio using EMR electromagnetic resonance principle)；
Step 5：Receiving terminal high frequency ac signal is sent to rectifying pressurizer 5 and carried out at rectifying and voltage-stabilizing by resonance receiver 4
Reason obtains charging direct current；
Step 6：Rectifying pressurizer 5 charges to load 7 with direct current using above-mentioned charging；
Step 7：While charging to load 7, the charging current of the acquisition load in real time of current controller 67 works as electricity
When the charging current of the acquisition load in real time of stream controller 67 is more than 1A, current controller 6, which controls Switching Power Supply 8, reduces output electricity
Pressure realizes closed-loop control, and charging current is made to stablize in 1A；When the charging current of the acquisition load in real time of current controller 67 is less than 1A
When, current controller 6 controls Switching Power Supply 8 and improves output voltage, realizes closed-loop control, so that charging current is stablized in 1A, works as electricity
Current controller 6 is not adjusted Switching Power Supply 8 when the charging current of the acquisition load in real time of stream controller 67 is equal to 1A, switchs
Power supply 8 is run by current state, and above-mentioned closed-loop control form can reduce energy loss to greatest extent.
The industrial-frequency alternating current of 220V, 50Hz are converted to 24V direct currents by Switching Power Supply 8 in the step 1.
Switching Power Supply 8 by 24V DC power transmissions to high-frequency inverter 1, put by high-frequency inverter 1 and power in the step 2
It is 110V that 24V direct currents are converted to peak-to-peak value by big device 2, and frequency is the high frequency ac signal of 178KHZ；
Peak-to-peak value is 110V by step 3 intermediate power amplifier 2, and frequency is that the high frequency ac signal of 178KHZ is transferred to
Resonance ejection device 3, it is 110V that resonance ejection device 3, which emits peak-to-peak value, and frequency is the oscillating magnetic field signal of 178KHZ；
Resonance receiver 4 receives the oscillating magnetic field signal of 3 transmitting of resonance ejection device in the step 4, and obtaining peak-to-peak value is
180V, frequency are the high frequency ac signal of 178KHZ；
Peak-to-peak value is 180V by resonance receiver 4 in the step 5, and frequency is that the high frequency ac signal of 178KHZ is sent to
Rectifying pressurizer 5 carries out rectifying and voltage-stabilizing and handles to obtain voltage to be 5V, and maximum current is the direct current of 953mA；
Rectifying pressurizer 5 is 5V using voltage in the step 6, and the direct current that maximum current is 953mA carries out load 7
Charging.
The test of mobile phone charging duration, charging voltage and electric current is carried out using the present invention, it is as a result as follows：
Charge duration, and when test, for the cell phone battery capacity used for 1370mAh, actual measurement is filled to 100% from electricity for 0
Required time is 13 minutes 3 hours, this charging rate is normal.
Charging voltage and electric current, when test, under the transmission range of 10mm, output end voltage 5.02V, electric current is
732mA.Meet the requirement charged normal.
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
Claims (7)
1. a kind of method to be charged using the WPT charging equipments based on electromagnetic coupling, it includes Switching Power Supply (8), high frequency
Inverter (1), power amplifier (2), resonance ejection device (3), resonance receiver (4), rectifying pressurizer (5) and current controller
(6), wherein the input terminal of the Switching Power Supply (8) is for connecting mains supply, and the input terminal of high-frequency inverter (1) is for connecting
Connect the output end of Switching Power Supply (8), the input terminal of the output end connection power amplifier (2) of high-frequency inverter (1), power amplification
The signal input part of the output end connection resonance ejection device (3) of device (2), the signal output end of resonance ejection device (3) is for exporting
Oscillating magnetic field signal, the signal input part of resonance receiver (4) is for receiving oscillating magnetic field signal, the letter of resonance receiver (4)
The signal output end of the signal input part of number output end connection rectifying pressurizer (5), rectifying pressurizer (5) is loaded for connecting
(7) charging end, the signal input part of current controller (6) are used to connect the charge current sample end of load (7), current control
The control terminal of the control signal output connecting valve power supply (8) of device (6)；The resonance ejection device (3) and resonance receiver (4) it
Between spacing range be 10~60mm；
The method to be charged using the WPT charging equipments based on electromagnetic coupling, which is characterized in that it includes the following steps：
Step 1：Industrial-frequency alternating current is converted to direct current by Switching Power Supply (8)；
Step 2：Switching Power Supply (8) gives DC power transmission to high-frequency inverter (1), high-frequency inverter (1) and power amplifier (2)
Direct current is converted into high frequency ac signal；
Step 3：High frequency ac signal is transferred to resonance ejection device (3) by power amplifier (2), and resonance ejection device (3) is according to height
Frequency AC signal emits oscillating magnetic field signal；
Step 4：Resonance receiver (4) receives the oscillating magnetic field signal that resonance ejection device (3) emits, and obtains receiving terminal high-frequency ac
Signal；
Step 5：Receiving terminal high frequency ac signal is sent to rectifying pressurizer (5) and carried out at rectifying and voltage-stabilizing by resonance receiver (4)
Reason obtains charging direct current；
Step 6：Rectifying pressurizer (5) charges to load (7) with direct current using above-mentioned charging；
Step 7：While charging to load (7), the charging current of current controller (6) acquisition load (7) in real time, when
When the charging current of current controller (6) acquisition load (7) in real time is more than 1A, current controller (6) controls Switching Power Supply (8) and drops
Low output voltage realizes closed-loop control, and charging current is made to stablize in 1A；When filling for current controller (6) acquisition load (7) in real time
When electric current is less than 1A, current controller (6) controls Switching Power Supply (8) and improves output voltage, realizes closed-loop control, keeps charging electric
Stream is stablized in 1A, and when the charging current of current controller (6) acquisition load (7) in real time is equal to 1A, current controller (6) is not right
Switching Power Supply (8) is adjusted, and Switching Power Supply (8) is run by current state.
2. the method according to claim 1 to be charged using the WPT charging equipments based on electromagnetic coupling, feature are existed
In：The Switching Power Supply (8) for realizing 220V, 50Hz industrial-frequency alternating current to 24V direct currents conversion.
3. the method according to claim 1 to be charged using the WPT charging equipments based on electromagnetic coupling, feature are existed
In：The power amplifier (2) is made of push-pull type power amplification circuit, and power amplifier (2) is for believing high-frequency high-power
Number output is in the transmitting coil of resonance ejection device (3).
4. the method according to claim 1 to be charged using the WPT charging equipments based on electromagnetic coupling, feature are existed
In：The resonance ejection device (3) is the resonant tank being made of inductance coil and capacitance.
5. the method according to claim 2 to be charged using the WPT charging equipments based on electromagnetic coupling, feature are existed
In：The high-frequency inverter (1) and power amplifier (2) are 110V for realizing 24V direct currents to peak-to-peak value, and frequency is
The conversion of the high frequency ac signal of 178KHZ.
6. the method according to claim 1 to be charged using the WPT charging equipments based on electromagnetic coupling, feature are existed
In：The resonance ejection device (3) and resonance receiver (4) working frequency having the same.
7. the method according to claim 1 to be charged using the WPT charging equipments based on electromagnetic coupling, feature are existed
In：24V DC power transmissions are given high-frequency inverter (1), high-frequency inverter (1) and power to put by Switching Power Supply (8) in the step 2
It is 110V that 24V direct currents are converted to peak-to-peak value by big device (2), and frequency is the high frequency ac signal of 178KHZ；
Peak-to-peak value is 110V by step 3 intermediate power amplifier (2), and frequency is transferred to humorous for the high frequency ac signal of 178KHZ
Shake transmitter (3), and it is 110V that resonance ejection device (3), which emits peak-to-peak value, and frequency is the oscillating magnetic field signal of 178KHZ；
Resonance receiver (4) receives the oscillating magnetic field signal that resonance ejection device (3) emits in the step 4, and obtaining peak-to-peak value is
180V, frequency are the high frequency ac signal of 178KHZ；
Peak-to-peak value is 180V by resonance receiver (4) in the step 5, and frequency is sent to whole for the high frequency ac signal of 178KHZ
Stream voltage-stablizer (5) carries out rectifying and voltage-stabilizing and handles to obtain voltage to be 5V, and maximum current is the direct current of 953mA；
Rectifying pressurizer (5) is 5V using voltage in the step 6, and the direct current that maximum current is 953mA carries out load (7)
Charging.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610154028.XA CN105811546B (en) | 2016-03-17 | 2016-03-17 | WPT charging equipments based on electromagnetic coupling and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610154028.XA CN105811546B (en) | 2016-03-17 | 2016-03-17 | WPT charging equipments based on electromagnetic coupling and method |
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| CN105811546A CN105811546A (en) | 2016-07-27 |
| CN105811546B true CN105811546B (en) | 2018-10-16 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787001A (en) * | 2017-02-27 | 2017-05-31 | 上海斐讯数据通信技术有限公司 | A kind of wireless charging feedback method and system |
| CN106787004A (en) * | 2017-02-27 | 2017-05-31 | 上海斐讯数据通信技术有限公司 | A kind of wireless charging feedback method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840528A (en) * | 2014-03-19 | 2014-06-04 | 国家电网公司 | Wireless charge control method based on coordination control over voltage and frequency of power supply |
| CN104158269A (en) * | 2014-08-11 | 2014-11-19 | 长城信息产业股份有限公司 | Wireless charging transmitter, receiver, charging device and wireless charging method |
| CN205489723U (en) * | 2016-03-17 | 2016-08-17 | 武汉理工大学 | WPT battery charging outfit based on electromagnetic coupling |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008236815A (en) * | 2007-03-16 | 2008-10-02 | Toko Inc | Non-contact power transmission apparatus |
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2016
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840528A (en) * | 2014-03-19 | 2014-06-04 | 国家电网公司 | Wireless charge control method based on coordination control over voltage and frequency of power supply |
| CN104158269A (en) * | 2014-08-11 | 2014-11-19 | 长城信息产业股份有限公司 | Wireless charging transmitter, receiver, charging device and wireless charging method |
| CN205489723U (en) * | 2016-03-17 | 2016-08-17 | 武汉理工大学 | WPT battery charging outfit based on electromagnetic coupling |
Non-Patent Citations (1)
| Title |
|---|
| 非接触感应耦合电能与控制技术及其应用研究;杨民生;《中国博士学位论文全文数据库》;20130515(第5期);第1-155 * |
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