CN115313674A - Electric energy and signal cooperative transmission implementation method for momentum wheel wireless slip ring - Google Patents
Electric energy and signal cooperative transmission implementation method for momentum wheel wireless slip ring Download PDFInfo
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- CN115313674A CN115313674A CN202111588122.3A CN202111588122A CN115313674A CN 115313674 A CN115313674 A CN 115313674A CN 202111588122 A CN202111588122 A CN 202111588122A CN 115313674 A CN115313674 A CN 115313674A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000005540 biological transmission Effects 0.000 title claims abstract description 26
- 230000008878 coupling Effects 0.000 claims abstract description 78
- 238000010168 coupling process Methods 0.000 claims abstract description 78
- 238000005859 coupling reaction Methods 0.000 claims abstract description 78
- 238000004891 communication Methods 0.000 claims abstract description 57
- 239000003990 capacitor Substances 0.000 claims description 51
- 238000002955 isolation Methods 0.000 claims description 14
- 238000005457 optimization Methods 0.000 abstract description 3
- 230000008054 signal transmission Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
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- 230000002457 bidirectional effect Effects 0.000 description 1
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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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- 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
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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Abstract
The invention relates to a realization method for the cooperative transmission of electric energy and signals of a momentum wheel wireless slip ring, which comprises the following contents: the primary side communication control circuit generates a control signal when detecting that a normal protection signal is input; generating a data signal according to the control signal, and outputting a corresponding power voltage; the power voltage and the data signal are output to the secondary magnetic coupling coil through the primary magnetic coupling coil; the power voltage received by the secondary side magnetic coupling coil is output to the momentum wheel load through an AC-DC rectifying circuit; and the received data signal is output to the secondary communication control circuit, and the secondary communication control circuit collects the voltage and current signals output by the momentum wheel load and feeds the voltage and current signals back to the primary communication control circuit to control the primary communication control circuit to generate a new control signal. The invention adopts a frequency division multiplexing mode and a magnetic coupling coil tap optimization method to improve the data wireless transmission gain.
Description
Technical Field
The invention relates to the technical field of space power electronic transformation, in particular to a method for realizing the cooperative transmission of electric energy and signals of a momentum wheel wireless slip ring, which can be used as a transmission scheme of electric energy and communication signals of an inner frame momentum wheel of an actuating mechanism of a space satellite and an aircraft attitude control system.
Background
The space attitude actuating mechanism, namely the control moment gyro is an important part for realizing rapid attitude maneuver and high-precision stability of a satellite or a spacecraft, wherein the momentum wheel is used as an important angular momentum generating part of the control moment gyro, is configured in the inner frame structure and can rotate integrally, so that the aim of changing the angular momentum at constant rotating speed is fulfilled.
The existing conventional control moment gyroscope is provided with a plurality of conductive slide ways through a conductive slide ring to realize the transmission of electric energy and communication signals to the inner frame momentum wheel, but the problems of increasing the resistance torque and prolonging the service life of the rotation times of the outer frame drive of the whole control moment gyroscope are solved, the problem of performance decline caused by the conductivity and the insulating property between the slide ways under the complex irradiation condition of a space environment also exists in the conductive slide ring material, and the high reliability and the long service life of the control moment gyroscope are seriously restricted from being exerted.
In order to further improve the reliability and system efficiency of electric energy and communication signal transmission when the momentum wheel is used as the inner frame of the control moment gyroscope, the invention provides a wireless slip ring based on non-contact electric energy and wireless control data signal transmission.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: when the momentum wheel is used as a rotatable inner frame, the problem of non-contact transmission of electric energy and signals required by momentum wheel driving is solved, and more reliable and safe cooperative transmission of electric energy and signals is provided for the momentum wheel of the traditional inner frame.
The invention provides a realization method for the electric energy and signal cooperative transmission of a momentum wheel wireless slip ring, which comprises the following steps:
s1: the primary side communication control circuit generates a control signal when detecting that a normal protection signal is input;
s2: the primary side communication control circuit generates a data signal according to the control signal and controls the full-bridge power inverter circuit to output the received direct-current voltage to a corresponding power voltage;
s3: the power voltage and the data signal are output to the secondary magnetic coupling coil through the primary magnetic coupling coil;
s4: the power voltage received by the secondary side magnetic coupling coil is output to the momentum wheel load through an AC-DC rectifying circuit; the received data signals are output to a secondary communication control circuit, and the secondary communication control circuit collects voltage and current signals output by the momentum wheel load;
s5: the secondary side communication control circuit feeds back the acquired voltage and current signals to the primary side communication control circuit through the magnetic coupling coil so as to control the primary side communication control circuit to generate a new control signal.
Furthermore, the primary side communication control circuit modulates the data signal and then sends the data signal to the secondary side communication control circuit; the secondary communication control circuit demodulates the modulated data signal.
Further, the method further comprises: the primary side magnetic coupling coil is connected with the primary side LC compensation circuit, the primary side LC compensation circuit is connected with the full-bridge power inverter circuit, and the power voltage passes through the primary side LC compensation circuit and then is output to the secondary side magnetic coupling coil through the primary side magnetic coupling coil.
The primary side LC compensation circuit comprises: the primary side compensation inductor comprises a first primary side capacitor, a second primary side capacitor and a primary side compensation inductor;
the first primary side capacitor and the primary side compensation inductor are connected in series between the first end of the primary side magnetic coupling coil and the primary side full-bridge power inverter circuit, and the first primary side capacitor is close to the primary side magnetic coupling coil;
and a first primary side node between the first primary side capacitor and the primary side compensation inductor is connected with a second primary side node between the second end of the primary side magnetic coupling coil and the primary side full-bridge power inverter circuit through a second primary side capacitor.
Further, the method further comprises: the primary side magnetic coupling coil is provided with a primary tap, a first end of the primary side magnetic coupling coil is connected with a first end of the primary side communication control circuit through a primary side isolation capacitor, and the primary tap is connected with a second end of the primary side communication control circuit.
The second primary side node is connected with the primary side communication control circuit through the primary side isolation capacitor.
Further, the method further comprises: the secondary side magnetic coupling coil is connected with a secondary side LC compensation circuit, and the secondary side magnetic coupling coil L s The received power voltage is output to an AC-DC rectifying circuit through a secondary LC compensating circuit and then loaded on a momentum wheel load.
Further, the secondary side LC compensation circuit includes: the first secondary side capacitor, the second secondary side capacitor and the secondary side compensation inductor;
the first secondary capacitor and the secondary compensation inductor are connected in series between the first end of the secondary magnetic coupling coil and the AC-DC rectifying circuit, and the first secondary capacitor is close to the secondary magnetic coupling coil;
and the second end of the secondary magnetic coupling coil is connected with the AC-DC rectifying circuit through a second secondary node between circuit connections and a first secondary node between the first secondary capacitor and the secondary compensation inductor through a second secondary capacitor.
Further, the method also comprises the following steps: and a secondary tap is arranged on the secondary magnetic coupling coil, a first end of the secondary magnetic coupling coil is connected with a first end of the secondary communication control circuit through a secondary isolation capacitor, and the secondary tap is connected with a second end of the secondary communication control circuit.
Furthermore, the second secondary side node is connected with the secondary side communication control circuit through the secondary side isolation capacitor.
In conclusion, the invention has the following beneficial effects:
1. the invention is embedded into a cylinder-type wireless slip ring in a magnetic coupling mode of sharing an electromagnetic magnetic coupling coil by power voltage and data signals, and integrates all component circuit elements in the wireless slip ring device to realize miniaturization;
2. the invention adopts a frequency division multiplexing mode and a magnetic coupling coil tap optimization method to improve the data wireless transmission gain.
Drawings
Fig. 1 is a schematic diagram illustrating a wireless power and signal cooperative transmission system according to the present invention;
FIG. 2 is a schematic diagram of a primary side and secondary side LC compensation network circuit according to the present invention;
FIG. 3 is a schematic configuration diagram of a wireless slip ring device for momentum wheel according to the present invention;
fig. 4 is a schematic diagram of a control flow method of a wireless slip ring power and signal system according to the present invention.
Detailed Description
The method for realizing the cooperative transmission of the electric energy and the signal of the wireless slip ring of the momentum wheel provided by the invention is further described in detail with reference to the accompanying drawings and the detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.
As shown in fig. 1, 2 and 4, the invention provides a method for realizing cooperative transmission of electric energy and signals of a wireless slip ring of a momentum wheel, comprising the following steps:
s1: the primary side communication control circuit 12 generates a control signal when detecting that a normal protection signal is input;
s2: the primary side communication control circuit 12 generates a data signal according to the control signal, and controls the full-bridge power inverter circuit 11 to convert the received direct-current voltage and output a corresponding power voltage according to the control signal; in this example, the full-bridge power inverter circuit 11 and the primary side communication control circuit 12 are connected to a 28V dc voltage source, the full-bridge power inverter circuit 11 converts the 28V dc voltage into a bipolar pulse power voltage with a frequency of 100kHz under the input of a control signal, and the primary side communication control circuit 12 generates a data signal with a carrier frequency of 10 MHz;
s3: the power voltage and the data signal are jointly superposed in the magnetic coupling coil for transmission, and specifically, the power voltage is subjected to no-power compensation through the primary LC compensation circuit 13 and then is subjected to no-power compensation through the primary magnetic coupling coil L p Output to secondary side magnetic coupling coil L s (ii) a The primary side communication control circuit 12 modulates the data signal firstly and then loads the data signal to the primary side magnetic coupling coil L through the primary side LC compensation circuit 13 p And output to the secondary side magnetic coupling coil L s ；
S4: secondary side magnetic coupling coil L s The received power voltage is output to the momentum wheel load M through an AC-DC rectification circuit 21; specifically, the received power voltage is output to the AC-DC rectifier circuit 21 after no power compensation through the secondary LC compensation circuit 23, and then loaded on the momentum wheel load M; the modulated data signal is output to a secondary side magnetic coupling coil L s Then, the data is transmitted to the secondary side communication control circuit 22 for demodulation;
s5: after the momentum wheel load M works, the secondary communication control circuit 22 collects voltage and current signals output by the momentum wheel load M;
the secondary communication control circuit 22 feeds back the collected voltage and current signals to the primary communication control circuit 12 through the magnetic coupling coil to control the primary communication control circuit 12 to generate a new control signal.
In this example, the full-bridge power inverter circuit 11 and the communication control circuit 12 are power and signal control systems based on an FPGA controller, the primary LC compensation circuit 13 may provide reactive power compensation on the primary side (transmitting end), the magnetic coupling coil performs electromagnetic common coupling of power voltage and data signals, the secondary LC compensation circuit 23 provides reactive power compensation on the secondary side (receiving end), and the power voltage is loaded on the momentum wheel load M through the AC-DC rectification circuit 21.
As shown in fig. 2, the primary side magnetic coupling coil L p The primary side LC compensation circuit 13 is connected with the full-bridge power inverter circuit 11, and the power voltage output by the full-bridge power inverter circuit 11 passes through the primary side LC compensation circuit 13 and then passes through the primary side magnetic coupling coil L p Output to secondary side magnetic coupling coil L s 。
Specifically, the primary side LC compensation circuit 13 comprises a first primary side capacitor C 12 A second primary side capacitor C 11 Primary side compensation inductance L 1 (ii) a The primary side magnetic coupling coil L p A first primary side capacitor C is sequentially connected in series between the first end of the primary side full-bridge power inverter circuit 11 and the first end of the primary side full-bridge power inverter circuit 12 Primary side compensation inductance L 1 Wherein the first primary side capacitor C 12 And primary side compensation inductance L 1 The connecting node between is a first primary side node N 11 (ii) a The primary side magnetic coupling coil L p The connection node between the second end of the primary side full-bridge power inverter circuit 11 and the second end of the primary side full-bridge power inverter circuit is a second primary side node N 12 Said second primary node N 12 And a first primary side node N 11 Is connected with a second primary side capacitor C 11 And (4) connecting. The second primary side node N 12 A primary side isolation capacitor C is arranged between the first end of the primary side communication control circuit 12 and the primary side 13 And (4) connecting.
Accordingly, the secondary side magnetic coupling coil L s A secondary LC compensation circuit 23, the secondary LC compensation circuit 23 is connected with an AC-DC rectification circuit 21, and the secondary coupling coil L s The received power voltage is output to the AC-DC rectifier circuit 21 through the secondary LC compensation circuit 23, and is further applied to the momentum wheel load M.
In particular, the secondary LC compensation circuit 23 comprises a first secondary capacitance C 22 The second auxiliary edgeCapacitor C 21 Secondary side compensation inductance L 2 (ii) a The secondary side magnetic coupling coil L s And a first secondary capacitor C is sequentially arranged between the first end of the AC-DC rectifying circuit 21 and the first end of the DC-AC rectifying circuit 22 Secondary side compensation inductance L 2 Wherein the first secondary capacitor C 22 And secondary compensation inductance L 2 The connecting node between is a first secondary side node N 21 (ii) a The secondary side magnetic coupling coil L s And the second terminal of the AC-DC rectification circuit 21 is a second secondary side node N 22 The second secondary edge node N 22 And a first minor edge node N 21 Through a second secondary capacitor C 21 And (4) connecting. The second minor edge node N 22 A secondary side isolation capacitor C is arranged between the first end of the secondary side communication control circuit 22 and the secondary side 23 And (4) connecting.
Compensation inductance L by primary LC compensation circuit 13 1 A first primary side capacitor C 12 And a second primary capacitor C 11 Forming a pi-shaped network, and converting the power voltage fundamental component of the primary input end to the secondary load side with maximum efficiency; meanwhile, the secondary LC compensation circuit 23 adopts the mode of compensating the inductance L by the secondary 2 A first secondary capacitor C 22 And a second minor edge C 21 The formed pi-shaped network receives the power voltage to the maximum extent.
Further, the primary side magnetic coupling coil L p Is provided with a primary tap and a primary side magnetic coupling coil L p Is connected to the first terminal of the first primary side capacitor C 12 A second primary side capacitor C 11 Primary side isolation capacitor C 13 Is connected to a first terminal of the primary side communication control circuit 12 and the primary tap is connected to a second terminal of the primary side communication control circuit 12.
The secondary side magnetic coupling coil L s Is provided with a secondary tap and a secondary side magnetic coupling coil L s Through a first secondary capacitor C 22 And a second minor edge C 21 Secondary side isolation capacitor C 23 Is connected to a first terminal of the secondary communication control circuit 22 and the secondary tap is connected to a second terminal of the secondary communication control circuit 22.
As shown in FIG. 3, theSide magnetic coupling coil L p A magnetic coupling coil L arranged on the secondary side s And all around establishing on wireless sliding ring, this unlimited sliding ring one end is provided with base 100 and is used for fixing. Secondary side magnetic coupling coil L s The primary tap and the secondary tap are respectively and commonly used by a primary side magnetic coupling coil and a secondary side magnetic coupling coil, and the number of turns of the primary side magnetic coupling coil and the secondary side magnetic coupling coil used for data signal transmission is the same by adjusting the tap positions. Primary side isolation capacitor C 13 And secondary side isolation capacitor C 23 For data signal transmission modulation, demodulation coupling and isolation of power voltages.
Specifically, in this example, a Frequency division multiplexing method is adopted to modulate and demodulate power voltages with different frequencies and bidirectional data signals through a shared electromagnetic coupling coil, so as to realize cooperative transmission of the power voltage signals and the data signals, the signal transmission adopts an FSK (Frequency shift keying) method, the modulation Frequency of the data signals is set to 10MHz, the carrier Frequency of the power voltage is set to 100kHz, and the carrier Frequency of the data signals is far higher than that of the power voltage signals, so as to realize Frequency division multiplexing of the power voltage and the data signal transmission.
In conclusion, the invention has the following beneficial effects:
1. the invention is embedded into a wireless slip ring with a cylinder type structure in a magnetic coupling mode of sharing an electromagnetic coupling coil by power voltage and data signals, and integrates all component circuit elements in the wireless slip ring device to realize miniaturization;
2. the invention adopts a frequency division multiplexing mode and a coupling coil tap optimization method to improve the wireless data transmission gain.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (10)
1. A realization method for the cooperative transmission of electric energy and signals of a momentum wheel wireless slip ring is characterized by comprising the following steps:
s1: the primary side communication control circuit (12) generates a control signal when detecting that a normal protection signal is input;
s2: the primary side communication control circuit (12) generates a data signal according to the control signal and controls the full-bridge power inverter circuit (11) to convert the received direct-current voltage into power voltage;
s3: the power voltage and the data signal pass through a primary side magnetic coupling coil (L) p ) Output to secondary side magnetic coupling coil (L) s )；
S4: secondary side magnetic coupling coil (L) s ) The received power voltage is output to a momentum wheel load (M) through an AC-DC rectification circuit (21); the received data signals are output to a secondary communication control circuit (22), and the secondary communication control circuit (22) collects voltage and current signals output by the momentum wheel load (M);
s5: the secondary side communication control circuit (22) feeds back the collected voltage and current signals to the primary side communication control circuit (12) through the magnetic coupling coil so as to control the primary side communication control circuit (12) to generate a new control signal.
2. The method for realizing the cooperative transmission of the electric energy and the signals of the momentum wheel wireless slip ring according to claim 1, wherein a primary side communication control circuit (12) modulates data signals and sends the modulated data signals to a secondary side communication control circuit (22); a secondary communication control circuit (22) demodulates the modulated data signal.
3. The method for realizing the cooperative transmission of the electric energy and the signals of the momentum wheel wireless slip ring according to claim 2, further comprising: the primary side magnetic coupling coil (L) p ) The power supply is connected with a primary LC compensation circuit (13), the primary LC compensation circuit (13) is connected with a full-bridge power inverter circuit (11), and the power voltage passes through the primary LC compensation circuit (13) and then passes through a primary magnetic coupling coil (L) p ) Output to secondary side magnetic coupling coil (L) s )。
4. As claimed in claimThe method for realizing the cooperative transmission of the electric energy and the signals of the momentum wheel wireless slip ring is characterized in that the primary LC compensation circuit (13) comprises: first primary side capacitor (C) 12 ) Second primary side capacitor (C) 11 ) Primary side compensation inductance (L) 1 )；
The first primary side capacitor (C) 12 ) Primary side compensation inductance (L) 1 ) Magnetic coupling coil (L) connected in series on primary side p ) Between the first terminal of the first primary side and the full-bridge power inverter circuit (11) of the primary side, and a first primary side capacitor (C) 12 ) Near the primary side magnetic coupling coil (L) p )；
The first primary side capacitor (C) 12 ) And primary side compensation inductance (L) 1 ) First primary side node (N) therebetween 11 ) Through a second primary capacitor (C) 11 ) A coil (L) magnetically coupled to the primary side p ) And a second primary side node (N) between the second end of the primary side full-bridge power inverter circuit (11) 12 ) And (4) connecting.
5. The method for realizing the cooperative transmission of the electric energy and the signals of the momentum wheel wireless slip ring according to claim 4, further comprising the following steps: the primary side magnetic coupling coil (L) p ) Is provided with a primary tap and a primary side magnetic coupling coil (L) p ) Through a primary side isolation capacitor (C) 13 ) The primary tap is connected with a first end of the primary side communication control circuit (12), and the primary tap is connected with a second end of the primary side communication control circuit (12).
6. The method for realizing the cooperative transmission of the electric energy and the signals of the momentum wheel wireless slip ring according to claim 5, wherein the second primary node (N) is 12 ) The primary side communication control circuit (12) is connected with the primary side isolation capacitor (C) 13 ) And (4) connecting.
7. The method for realizing the cooperative transmission of the electric energy and the signals of the momentum wheel wireless slip ring according to claim 2, further comprising: the secondary side magnetic coupling coil (L) s ) A secondary side magnetic coupling coil (L) connected with the secondary side LC compensation circuit (23) s ) The received power voltage is passed through the secondary side LThe C compensation circuit (23) outputs to an AC-DC rectification circuit (21), and is further applied to the momentum wheel load (M).
8. The method for realizing the cooperative transmission of the electric energy and the signals of the momentum wheel wireless slip ring according to claim 7, wherein the secondary LC compensation circuit (23) comprises: first secondary capacitor (C) 22 ) And a second secondary side capacitor (C) 21 ) Secondary side compensation inductance (L) 2 )；
The first secondary capacitor (C) 22 ) Secondary side compensation inductance (L) 2 ) Magnetic coupling coil (L) connected in series on secondary side s ) Between the first terminal of (A) and the AC-DC rectification circuit (21), and a first secondary capacitance (C) 22 ) Near secondary side magnetic coupling coil (L) s )；
The first secondary capacitor (C) 22 ) And secondary compensation inductance (L) 2 ) First secondary node (N) in between 21 ) Through the second secondary side capacitor (C) 21 ) A coil (L) magnetically coupled to the secondary side s ) Is electrically connected to the AC-DC rectification circuit (21) through a second secondary node (N) 22 ) And (4) connecting.
9. The method for realizing the cooperative transmission of the electric energy and the signal of the momentum wheel wireless slip ring according to claim 8, further comprising: the secondary side magnetic coupling coil (L) s ) Is provided with a secondary tap and a secondary side magnetic coupling coil (L) s ) Is connected to the first terminal of the capacitor (C) through the secondary side 23 ) Is connected to a first terminal of the secondary communication control circuit (22), and the secondary tap is connected to a second terminal of the secondary communication control circuit (22).
10. The method for realizing the cooperative transmission of electric energy and signals of the momentum wheel wireless slip ring according to claim 9, wherein the second secondary side node (N) is a node 22 ) The secondary side communication control circuit (22) is connected with the secondary side isolation capacitor (C) 23 ) And (4) connecting.
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| CN107437854A (en) * | 2016-05-26 | 2017-12-05 | 霍尼韦尔国际公司 | Multiple degrees of freedom electromagnetic machine |
| US20180015832A1 (en) * | 2016-07-12 | 2018-01-18 | Denso International America, Inc. | Vehicular Wireless Power Transfer System With Performance Monitoring |
| CN110690765A (en) * | 2019-10-11 | 2020-01-14 | 哈尔滨工业大学 | High-speed full-duplex wireless energy data synchronous transmission system based on frequency division multiplexing |
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- 2021-12-23 CN CN202111588122.3A patent/CN115313674A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170021947A1 (en) * | 2015-07-22 | 2017-01-26 | California Institute Of Technology | Large-Area Structures for Compact Packaging |
| CN107437854A (en) * | 2016-05-26 | 2017-12-05 | 霍尼韦尔国际公司 | Multiple degrees of freedom electromagnetic machine |
| US20180015832A1 (en) * | 2016-07-12 | 2018-01-18 | Denso International America, Inc. | Vehicular Wireless Power Transfer System With Performance Monitoring |
| CN110690765A (en) * | 2019-10-11 | 2020-01-14 | 哈尔滨工业大学 | High-speed full-duplex wireless energy data synchronous transmission system based on frequency division multiplexing |
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