CN105186705A - High-efficiency electric energy transmitting terminal, non-contact electric energy transmission device, and electric energy transmission method - Google Patents
High-efficiency electric energy transmitting terminal, non-contact electric energy transmission device, and electric energy transmission method Download PDFInfo
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- CN105186705A CN105186705A CN201510472008.2A CN201510472008A CN105186705A CN 105186705 A CN105186705 A CN 105186705A CN 201510472008 A CN201510472008 A CN 201510472008A CN 105186705 A CN105186705 A CN 105186705A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention discloses a high-efficiency electric energy transmitting terminal, a non-contact electric energy transmission device, and an electric energy transmission method. An output equivalent impedor of a direct current-alternating current voltage converter is adjusted by an inductor or a soft switch control circuit formed by an inductor and a capacitor, so that the output equivalent impedor is maintained to be inductive impedor. And because the inductive impedor current lags behind the voltage, the voltage of the switching device of the direct current-alternating current voltage converter is reduced to zero before conduction, thereby realizing zero-voltage conduction.
Description
Technical field
The present invention relates to delivery of electrical energy field, in particular, relate to a kind of high efficiency electric energy transmitting terminal, non-contact electric energy transmission device and method of electric energy transfer.
Background technology
Transmitting non-contact electric energy technology is widely used in electronics field due to its convenient and practical feature, at present, the mode realizing transmitting non-contact electric energy mainly contains magnetic inductive and magnetic resonance type two kinds of modes, magnetic inductive due to by transmission range to limit its application scenario very limited, magnetic resonance type wireless power transmission can realize remote, powerful delivery of electrical energy, can be widely used in electric terminal, electric automobile, under water, the charging of inferior power consumption equipment and power supply.
Common wireless electric energy transmission device mainly comprises electric energy transmitting terminal and electric energy receiving terminal, and both realize the transmission of energy by electromagnetic induction or magnetic resonance principle.Wherein, electric energy transmitting terminal includes inverter and transmitting coil, and inverter receives direct voltage and produces alternating voltage, and it is ω that transmitting coil receives alternating voltage generation frequency
0alternating magnetic field, the receiving coil in electric energy receiving terminal is coupled described alternating magnetic field, and generating frequency is ω
0alternating voltage V
sin (ω 0).In general, the frequency of alternating magnetic field is lower, and the distance of delivery of electrical energy is shorter, therefore, in order to increase the distance of wireless power transmission, needs the frequency improving alternating magnetic field.And the introduction of relevant criterion according to wireless charging, such as Qi and PMA wireless charging standard, in electromagnetic induction radio energy transmission system, the frequency of alternating magnetic field is between 100kHz-500kHz, and delivery of electrical energy distance is usually below one centimetre; According to A4WP wireless charging standard, in magnetic resonance radio energy transmission system, if the frequency of alternating magnetic field is 6.78MHz, then corresponding delivery of electrical energy distance can reach several centimetres.
Therefore, in order to improve transmission range, general employing magnetic resonance wireless power transmission mode, and produce the alternating magnetic field of 6.78MHz frequency, accordingly, the switching device in inverter needs the frequency being operated in 6.78MHz.And when switching device is operated in 6.78MHz, switching device will produce very large switching loss, significantly reduce switch life, in order to reduce the wastage, usually need to adopt soft switch technique (ZVS), reduce the wastage to make switching device.
Summary of the invention
In view of this, the present invention proposes a kind of high efficiency electric energy transmitting terminal, non-contact electric energy transmission device and method of electric energy transfer, by the output equivalent impedance of regulable control DC-AC voltage converter, to make described output equivalent impedance for emotional resistance, thus make the switching device conducting when no-voltage pressure drop in described inverter, realize Sofe Switch conducting, greatly can reduce switching loss when high-frequency.
According to the high efficiency electric energy transmitting terminal of one of the present invention, the electric energy receiving terminal transmitting energy of Xiang Yuqi isolation, described electric energy transmitting terminal comprises:
DC-AC voltage converter, receives direct voltage to export the alternating voltage with predeterminated frequency;
Electric energy radiating portion, comprises former edge emitting coil, and described former edge emitting coil receives described alternating voltage and produces alternating magnetic field, with to described electric energy receiving terminal transmitting energy;
Soft switch control circuit, is connected between described DC-AC voltage converter and electric energy radiating portion, in order to regulate the output equivalent impedance of described DC-AC voltage converter, to make described output equivalent impedance be emotional resistance;
Wherein, described predeterminated frequency is consistent with the system operating frequency of described electric energy transmitting terminal and electric energy receiving terminal.
Further, described electric energy radiating portion also comprises former limit resonant capacitance, and the resonance frequency of described former limit resonant capacitance and described former edge emitting coil is described predeterminated frequency.
Preferably, described soft switch control circuit comprises one first inductance, and the two ends of described first inductance connect described DC-AC voltage converter and described electric energy radiating portion respectively.
Preferably, the induction reactance value of described inductance regulates according to the operating current of described DC-AC voltage converter.
Preferably, described soft switch control circuit comprises the first inductance and the first electric capacity,
The first end of described first inductance connects the first output of described DC-AC voltage converter, and the second end is connected to described electric energy radiating portion;
The first end of described first electric capacity is connected with the second end of described first inductance, and the second end connects the second output of described DC-AC voltage converter.
Preferably, described first inductance and the resonance frequency of the first electric capacity are set to consistent with described predeterminated frequency.
According to a kind of transmitting non-contact electric energy method of the present invention, by mutually isolated electric energy transmitting terminal and electric energy receiving terminal transmitting energy, comprise the following steps:
Utilize DC-AC voltage converter to receive direct voltage to export the alternating voltage with predeterminated frequency, described predeterminated frequency is consistent with the system operating frequency of described electric energy transmitting terminal and electric energy receiving terminal;
Regulate the output equivalent impedance of described DC-AC voltage converter, to make described output equivalent impedance be emotional resistance;
Receive described alternating voltage to produce alternating magnetic field, with to described electric energy receiving terminal transmitting energy;
Respond to described alternating magnetic field to obtain corresponding alternating voltage, described alternating voltage is converted to suitable direct voltage supply output loading.
Preferably, regulable control is carried out in the output equivalent impedance of soft switch control circuit to described DC-AC voltage converter utilizing the first inductance to form.
Preferably, the induction reactance value of described inductance regulates according to the operating current of described DC-AC voltage converter.
Preferably, the output equivalent impedance of soft switch control circuit to described DC-AC voltage converter of the first inductance and the first electric capacity composition is utilized to carry out regulable control.
Preferably, described first inductance and the resonance frequency of the first electric capacity are set to consistent with described predeterminated frequency.
According to a kind of non-contact electric energy transmission device of the present invention, comprise electric energy transmitting terminal and the electric energy receiving terminal of isolation, described electric energy transmitting terminal is above-mentioned electric energy transmitting terminal;
Described electric energy receiving terminal comprises secondary receiving coil and current rectifying and wave filtering circuit, the alternating magnetic field that the described former edge emitting coil of described secondary receiving coil induction produces, to obtain corresponding alternating voltage, described alternating voltage is converted to suitable direct voltage supply output loading by described current rectifying and wave filtering circuit.
According to above-mentioned high efficiency electric energy transmitting terminal, non-contact electric energy transmission device and method of electric energy transfer, the soft switch control circuit utilizing an inductance or be made up of inductance and electric capacity is to regulate the output equivalent impedance of described DC-AC voltage converter, output equivalent impedance is made to remain emotional resistance, and the characteristic of voltage is lagged behind according to the electric current of emotional resistance, the switching device pressure drop before conducting in DC-AC voltage converter can be allowed to drop to zero, realize no-voltage conducting.Technical scheme of the present invention has following beneficial effect:
1., at high-frequency condition decline low switching losses, realize high efficiency wireless power transmission;
2. soft switch control circuit adopts passive device, and easy to control, cost is low;
3. the soft switch control circuit utilizing inductance and electric capacity to form not only can well realize Sofe Switch conducting, suitable resonance frequency can also be set, using the impedance matching network simultaneously as electric energy transmitting terminal, realize the adjustment to primary current, improve the delivery of electrical energy efficiency of system.
Accompanying drawing explanation
Figure 1 shows that the circuit block diagram of the first embodiment according to electric energy transmitting terminal of the present invention;
Figure 2 shows that the circuit block diagram of the second embodiment according to electric energy transmitting terminal of the present invention.
Embodiment
Below in conjunction with accompanying drawing, several preferred embodiment of the present invention is described in detail, but the present invention is not restricted to these embodiments.The present invention contain any make on marrow of the present invention and scope substitute, amendment, equivalent method and scheme.To have the present invention to make the public and understand thoroughly, in the following preferred embodiment of the present invention, describe concrete details in detail, and do not have the description of these details also can understand the present invention completely for a person skilled in the art.
With reference to the circuit block diagram that Figure 1 shows that the first embodiment according to electric energy transmitting terminal of the present invention, described electric energy transmitting terminal is applied in non-contact electric energy transmission system, electric energy transmitting terminal is in order to the electric energy receiving terminal transmitting energy with its isolation, and as shown in Figure 1, the equiva lent impedance of electric energy receiving terminal is designated as Z
d.In present embodiment, described electric energy transmitting terminal includes DC-AC voltage converter 11 (i.e. DC-AC inverter), soft switch control circuit 12 and electric energy radiating portion (electric energy radiating portion and Fig. 1 in magnetic resonance network 13), wherein, magnetic resonance network 13 comprises former edge emitting coil Ls and former limit resonant capacitance Cs, here, when less demanding to circuit parameter or circuit parasitic capacitance is larger when, former limit resonant capacitance Cs can not need, but those skilled in the art are known, when circuit does not arrange resonant capacitance, need to arrange capacitance at electric energy transmitting terminal to isolate the direct current biasing that DC-AC inverter exports.
Concrete, described DC-AC inverter 11 can be multiple implementation that is of the prior art or that improve, can be such as the various inverter circuits such as full-bridge inverter, half-bridge inverter, ClassD inverter or ClassE inverter, for ClassD inverter in Fig. 1, shown DC-AC inverter comprises the upper switching tube Q1 of series connection and lower switching tube Q2, here, described upper switching tube Q1 and lower switching tube Q2 is MOS field-effect transistor, and both have body diode D1 and D2 respectively.Those skilled in the art are known, and upper switching tube Q1 and lower switching tube Q2 is not limited to above-mentioned transistor, can also be formed for the independent switch pipe and diode combinations with said function.Described DC-AC inverter 11 receives direct voltage V
dcto export the alternating voltage V with predeterminated frequency
ac, described predeterminated frequency is consistent with the system operating frequency of described non-contact electric energy transmission device, is designated as ω
0, the system operating frequency of described wireless electric energy transmission device presets according to circuit structure and efficiency requirements.
In the present embodiment, for improving the efficiency of transmission of system, the resonance frequency of described former edge emitting coil Ls and former limit resonant capacitance Cs is set to the operating frequency ω with system
0unanimously.It is ω that described former edge emitting coil Ls receives described frequency
0alternating voltage to produce alternating magnetic field, with to described electric energy receiving terminal transmitting energy, the alternating magnetic field that the described former edge emitting coil of secondary receiving coil induction in described electric energy receiving terminal produces, to obtain corresponding alternating voltage, afterwards, described alternating voltage is converted to suitable direct voltage supply output loading by current rectifying and wave filtering circuit.
Further, soft switch control circuit 12 described in the present embodiment specifically comprises the first inductance L 1, and the first end of described first inductance is connected to the points of common connection of switching tube Q1 and lower switching tube Q2, and the second end is connected with described former edge emitting coil Ls.Here, if the resistance value of described first inductance is j ω
0l=jV.
Circuit structure according to Fig. 1 sets forth Sofe Switch control principle of the present invention: because the resonance frequency of former edge emitting coil Ls and former limit resonant capacitance Cs is ω
0, therefore, in the non-contact electric energy transmission system course of work, when system frequency is ω
0time, the equiva lent impedance of magnetic resonance network is zero, and at this moment, the output equivalent impedance Z of described DC-AC inverter is:
Z＝jX+Zd(1)
As can be seen from formula (1), no matter output loading whether change or when electric energy receiving terminal and electric energy transmitting terminal be coupled change time, the output equivalent impedance of DC-AC inverter is all in emotional resistance, and the characteristic of voltage is lagged behind according to the electric current of emotional resistance, the switching tube in DC-AC inverter can realize no-voltage conducting.Be specially, when upper switching tube Q1 conducting, when lower switching tube Q2 turns off, the two ends current phase of inductance L 1 can lag behind voltage-phase 90 °, afterwards, upper switching tube Q1 turns off, and enters Dead Time interval, at this moment, because the first inductance L 1 electric current is non-vanishing, electric current is by the body diode D2 afterflow of the first inductance L 1, former edge emitting coil Ls, resonant capacitance Cs and lower switching tube, and the pressure drop of lower switching tube Q2 can drop to zero, open lower switching tube Q2, namely achieve no-voltage conducting.According to same principle, for upper switching tube Q1, also no-voltage conducting can be realized by the first inductance L 1.
You need to add is that, according to the electric current I in DC-AC inverter
acformula:
As can be seen from formula (2), when output loading increases the weight of or the coupling of electric energy transmitting terminal and receiving terminal dies down, secondary equiva lent impedance Z
dcan increase, like this, the operating current Iac of inverter reduces accordingly, and the energy helping the switching device in inverter to realize no-voltage conducting also correspondingly reduces.Therefore, in order to ensure all to realize ZVS in the full work period, need the Dead Time between the induction reactance value of choose reasonable inductance L 1 or by-pass cock pipe, such as, when the operating current Iac of inverter reduces, the induction reactance value that suitably can reduce the first inductance L 1 or the Dead Time increased between switching tube, to ensure that pressure drop is reduced to zero before lower switching tube conducting.
Known by above-mentioned technical scheme, soft switch control circuit of the present invention regulates the output equivalent impedance of DC-AC inverter, make its equiva lent impedance in the course of work in perception, according to the characteristic of emotional resistance, inverter breaker in middle pipe in the course of the work, in the conducting of no-voltage place, Sofe Switch conducting can be realized.The present invention adopts manageable passive device to realize Sofe Switch conducting, without the need to the control circuit of complexity, greatly can reduce switching loss, effectively improve system works efficiency in high-frequency situation.
With reference to the circuit block diagram that Figure 2 shows that the second embodiment according to electric energy transmitting terminal of the present invention; Magnetic resonance network 13 in the present embodiment is identical with a upper embodiment, no longer repeat to set forth at this, in the present embodiment, described DC-AC inverter 11 is for full-bridge switch inverter, as shown in Figure 2, DC-AC inverter 11 to comprise on first switching tube Q3, first time switching tube Q2 and second time switching tube Q4 on switching tube Q1, second, switching tube in the present embodiment in inverter is all to have the transistor of body diode but to be not limited thereto, as shown in Figure 2, the body diode of four switching tubes is respectively D1, D2, D3 and D4.
Further, soft switch control circuit 12 in the present embodiment comprises the first inductance L 1 and the first electric capacity C1, the first end of described first inductance L 1 connects the first output of described full-bridge switch inverter, and as A point in Fig. 2, the second end is connected to the first end of described former edge emitting coil; The first end of described first electric capacity C1 is connected with the second end of described first inductance, and the second end connects the second output of described full-bridge switch inverter, as B point in Fig. 2.
Preferably, in the present embodiment, the resonance frequency of described first inductance L 1 and the first electric capacity C1 is set to and described predeterminated frequency ω
0unanimously, namely have
wherein, L is the induction reactance value of the first inductance, and C is the capacitor value of the first electric capacity, and the impedance defining the first inductance L 1 is: j ω
0the impedance of L=jX first electric capacity C1 is :-jX.When the resonance frequency of former edge emitting coil Ls and former limit resonant capacitance Cs is ω
0, the equiva lent impedance of magnetic resonance network is zero, then the output equivalent impedance Z of described DC-AC inverter is:
As can be seen from formula (3), the output equivalent impedance of DC-AC inverter is emotional resistance, and lags behind the characteristic of voltage according to the electric current of emotional resistance, and the switching tube in DC-AC inverter all can realize no-voltage conducting.Be specially, switching tube Q1 and second time switching tube Q4 conducting on first, when on first time switching tube Q2 and second, switching tube Q3 turns off, output equivalent impedance due to inverter is emotional resistance, the current phase of emotional resistance can lag behind voltage-phase 90 °, afterwards, on first, switching tube Q1 and second time switching tube Q4 turns off, enter Dead Time interval, at this moment, first inductance L 1 electric current is non-vanishing, electric current is by the first inductance L 1, former edge emitting coil Ls, resonant capacitance Cs, the body diode D3 afterflow of switching tube on the body diode D2 and second of first time switching tube, when on first time switching tube Q2 and second, the pressure drop of switching tube Q3 drops to zero, open switching tube Q3 on first time switching tube Q2 and second, namely no-voltage conducting is achieved.According to same principle, for switching tube Q1 and second time switching tube Q4 on first, also no-voltage conducting can be realized by the first inductance L 1 and the first electric capacity C1.
And according to circuit working principle, the operating current Iac of described DC-AC inverter is:
Find out from formula (4), the operating current Iac of inverter is less by ectocine, when output loading increases, and equiva lent impedance Z
dbecome large, the electric current I ac in DC-AC inverter also correspondingly increases, and at this moment can better help the switching device in inverter to realize Sofe Switch open-minded.Only have the soft switch control circuit of inductance L relative to upper one, present embodiment, without the need to the Dead Time of by-pass cock pipe, better can realize Sofe Switch, improve operating efficiency.
In the above-described embodiments, when the resonance frequency of described first inductance L 1 and the first electric capacity C1 is set to ω
0time, described soft switch control circuit also simultaneously can as the impedance matching circuit of described electric energy transmitting terminal, be in the patent of invention of 201510011896.8 at number of patent application, the resonance frequency set forth as the first inductance L 1 and the first electric capacity C1 is set to system operating frequency ω
0time, the impedance matching circuit that described soft switch control circuit is formed can regulate the electric current of former edge emitting coil to be the alternating current of constant frequency constant amplitude, thus improves the efficiency of transmission of radio energy.
The soft switch control circuit of the embodiment of the present invention, the no-voltage conducting to inverter breaker in middle pipe is realized by the first inductance and the first electric capacity, circuit is simple, effective, and described soft switch control circuit simultaneously as the impedance matching circuit on former limit, can also improve the delivery of electrical energy efficiency of system while realizing Sofe Switch.
It should be noted that, the DC-AC inverter in above-mentioned two embodiments uses half-bridge inverter and full-bridge inverter example respectively, but is not limited to above-mentioned compound mode.Such as the soft switch control circuit of the first inductance and the second capacitor combination also can regulate the conducting voltage of the switching tube of half-bridge inverter, to realize Sofe Switch conducting; The soft switch control circuit that first inductance is formed also can regulate the conducting voltage of the switching tube of full-bridge inverter, to realize Sofe Switch conducting.Further, two kinds of above-mentioned soft switch control circuit all can be applied to DC-AC inverter of the prior art as ClassD inverter and ClassE inverter.
The invention also discloses a kind of transmitting non-contact electric energy method, by mutually isolated electric energy transmitting terminal and electric energy receiving terminal transmitting energy, comprise the following steps:
Utilize DC-AC voltage converter to receive direct voltage to export the alternating voltage with predeterminated frequency, described predeterminated frequency is consistent with the system operating frequency of described electric energy transmitting terminal and electric energy receiving terminal;
Regulate the output equivalent impedance of described DC-AC voltage converter, to make described output equivalent impedance be emotional resistance;
Receive described alternating voltage to produce alternating magnetic field, with to described electric energy receiving terminal transmitting energy;
Respond to described alternating magnetic field to obtain corresponding alternating voltage, described alternating voltage is converted to suitable direct voltage supply output loading.
Preferably, regulable control is carried out in the output equivalent impedance of soft switch control circuit to described DC-AC voltage converter utilizing the first inductance to form.The induction reactance value of described inductance regulates according to the operating current of described DC-AC voltage converter.
The output equivalent impedance of soft switch control circuit to described DC-AC voltage converter of the first inductance and the first electric capacity composition is preferably utilized to carry out regulable control.Described first inductance and the resonance frequency of the first electric capacity are set to consistent with described predeterminated frequency.
Finally, the invention also discloses a kind of non-contact electric energy transmission device, comprise electric energy transmitting terminal and the electric energy receiving terminal of isolation, described electric energy transmitting terminal is above-mentioned electric energy transmitting terminal; Described electric energy receiving terminal comprises secondary receiving coil and current rectifying and wave filtering circuit, the alternating magnetic field that the described former edge emitting coil of described secondary receiving coil induction produces, to obtain corresponding alternating voltage, described alternating voltage is converted to suitable direct voltage supply output loading by described current rectifying and wave filtering circuit.In like manner, described non-contact electric energy transmission device can realize the Sofe Switch conducting to DC-AC voltage converter breaker in middle device equally, switching device loss can be reduced at high frequencies, the soft switch circuit of the formation of the first inductance and the first electric capacity can also be utilized to realize the function of Sofe Switch and impedance matching simultaneously, use device is few, and system effectiveness is high.
Carried out detailed description to according to the high efficiency electric energy transmitting terminal of the preferred embodiments of the present invention and non-contact electric energy transmission device above, those of ordinary skill in the art can know other technologies or structure and circuit layout, element etc. accordingly by inference and all can be applicable to described embodiment.
According to embodiments of the invention as described above, these embodiments do not have all details of detailed descriptionthe, do not limit the specific embodiment that this invention is only described yet.Obviously, according to above description, can make many modifications and variations.This specification is chosen and is specifically described these embodiments, is to explain principle of the present invention and practical application better, thus makes art technical staff that the present invention and the amendment on basis of the present invention can be utilized well to use.The present invention is only subject to the restriction of claims and four corner and equivalent.
Claims (12)
1. a high efficiency electric energy transmitting terminal, the electric energy receiving terminal transmitting energy of Xiang Yuqi isolation, it is characterized in that, described electric energy transmitting terminal comprises:
DC-AC voltage converter, receives direct voltage to export the alternating voltage with predeterminated frequency;
Electric energy radiating portion, comprises former edge emitting coil, and described former edge emitting coil receives described alternating voltage and produces alternating magnetic field, with to described electric energy receiving terminal transmitting energy;
Soft switch control circuit, is connected between described DC-AC voltage converter and electric energy radiating portion, in order to regulate the output equivalent impedance of described DC-AC voltage converter, to make described output equivalent impedance be emotional resistance;
Wherein, described predeterminated frequency is consistent with the system operating frequency of described electric energy transmitting terminal and electric energy receiving terminal.
2. electric energy transmitting terminal according to claim 1, is characterized in that, described electric energy radiating portion also comprises former limit resonant capacitance, and the resonance frequency of described former limit resonant capacitance and described former edge emitting coil is described predeterminated frequency.
3. electric energy transmitting terminal according to claim 1 and 2, is characterized in that, described soft switch control circuit comprises one first inductance, and the two ends of described first inductance connect described DC-AC voltage converter and described electric energy radiating portion respectively.
4. electric energy transmitting terminal according to claim 3, is characterized in that, the induction reactance value of described inductance regulates according to the operating current of described DC-AC voltage converter.
5. electric energy transmitting terminal according to claim 1 and 2, is characterized in that, described soft switch control circuit comprises the first inductance and the first electric capacity,
The first end of described first inductance connects the first output of described DC-AC voltage converter, and the second end is connected to described electric energy radiating portion;
The first end of described first electric capacity is connected with the second end of described first inductance, and the second end connects the second output of described DC-AC voltage converter.
6. electric energy transmitting terminal according to claim 5, is characterized in that, described first inductance and the resonance frequency of the first electric capacity are set to consistent with described predeterminated frequency.
7. a transmitting non-contact electric energy method, by mutually isolated electric energy transmitting terminal and electric energy receiving terminal transmitting energy, is characterized in that, comprise the following steps:
Utilize DC-AC voltage converter to receive direct voltage to export the alternating voltage with predeterminated frequency, described predeterminated frequency is consistent with the system operating frequency of described electric energy transmitting terminal and electric energy receiving terminal;
Regulate the output equivalent impedance of described DC-AC voltage converter, to make described output equivalent impedance be emotional resistance;
Receive described alternating voltage to produce alternating magnetic field, with to described electric energy receiving terminal transmitting energy;
Respond to described alternating magnetic field to obtain corresponding alternating voltage, described alternating voltage is converted to suitable direct voltage supply output loading.
8. method of electric energy transfer according to claim 7, is characterized in that, regulable control is carried out in the output equivalent impedance of soft switch control circuit to described DC-AC voltage converter utilizing the first inductance to form.
9. method of electric energy transfer according to claim 8, is characterized in that, the induction reactance value of described inductance regulates according to the operating current of described DC-AC voltage converter.
10. method of electric energy transfer according to claim 7, is characterized in that, utilizes the output equivalent impedance of soft switch control circuit to described DC-AC voltage converter of the first inductance and the first electric capacity composition to carry out regulable control.
11. method of electric energy transfer according to claim 10, is characterized in that, described first inductance and the resonance frequency of the first electric capacity are set to consistent with described predeterminated frequency.
12. 1 kinds of non-contact electric energy transmission devices, comprise electric energy transmitting terminal and the electric energy receiving terminal of isolation, it is characterized in that,
Described electric energy transmitting terminal is the electric energy transmitting terminal described in any one of claim 1-6;
Described electric energy receiving terminal comprises secondary receiving coil and current rectifying and wave filtering circuit, the alternating magnetic field that the described former edge emitting coil of described secondary receiving coil induction produces, to obtain corresponding alternating voltage, described alternating voltage is converted to suitable direct voltage supply output loading by described current rectifying and wave filtering circuit.
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| CN201510472008.2A CN105186705B (en) | 2015-08-04 | 2015-08-04 | A kind of efficient electric energy transmitting terminal, non-contact electric energy transmission device and method of electric energy transfer |
| US15/202,719 US10186908B2 (en) | 2015-08-04 | 2016-07-06 | Efficient power transmitting terminal, contactless power transmission device and power transmission method |
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| US10153699B2 (en) | 2016-07-01 | 2018-12-11 | Ningbo Weie Electronics Technology Ltd. | Control method for power transmitter, power transmitter and noncontact power transfer apparatus |
| CN110212649A (en) * | 2018-02-28 | 2019-09-06 | 泰达电子股份有限公司 | Wireless power transfer control |
| CN110212649B (en) * | 2018-02-28 | 2024-05-28 | 泰达电子股份有限公司 | Wireless power transfer control |
| WO2020000481A1 (en) * | 2018-06-30 | 2020-01-02 | 华为技术有限公司 | Rectifier and driving method therefor, chip, and power device |
| CN109742863A (en) * | 2018-12-27 | 2019-05-10 | 华为技术有限公司 | A kind of receiving end of wireless charging system, transmitting terminal and wireless charging system |
| CN112366760A (en) * | 2019-07-25 | 2021-02-12 | Oppo广东移动通信有限公司 | Charging circuit, charging method and wireless transmitting equipment |
| CN110816321A (en) * | 2019-08-12 | 2020-02-21 | 华为技术有限公司 | Wireless charging transmitting device, transmitting method and wireless charging system |
| WO2021027823A1 (en) * | 2019-08-12 | 2021-02-18 | 华为技术有限公司 | Wireless charging transmitting device and method and wireless charging system |
| CN110816321B (en) * | 2019-08-12 | 2022-11-11 | 华为技术有限公司 | Wireless charging transmitting device, transmitting method and wireless charging system |
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| CN105186705B (en) | 2017-11-10 |
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