Wireless electric energy transmission system suitable for bracket unmanned aerial vehicle

Abstract

The utility model provides a wireless electric energy transmission system suitable for a support unmanned aerial vehicle, and relates to the technical field of wireless electric energy, the system comprises a high-frequency signal generating device and a cross four-winding solenoid mechanism, the high-frequency signal generating device gives MOSFET switching signals in four single-tube high-frequency driving coil modules through a pulse generator, and the cross four-winding solenoid mechanism is connected with the cross four-winding solenoid mechanism. The four single-tube high-frequency driving coil modules are respectively controlled by an MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor), and are divided into two groups of complementary circuits in a manner that capacitors are connected in parallel with inductors and capacitors are connected in series with inductors; the four single-tube high-frequency receiving coil modules and the four single-tube high-frequency receiving coil modules are wound on a cross-shaped magnetic core together to form a cross-shaped four-winding solenoid mechanism of a primary solenoid and a secondary solenoid, and the final electric energy transmission effect is achieved through magnetic coupling.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless power, in particular to a wireless power transmission system applicable to a bracket unmanned aerial vehicle (UAV). Background Art

[0002] Existing wireless power transmission systems usually perform power transmission through a group of coils via a multi-tube resonant compensation circuit, that is, a transformer composed of a group of primary coils and secondary coils is used to transmit power. For example, the Chinese utility model patent with the publication number CN220010117U discloses "a wireless charging system for UAVs", which realizes energy transmission by forming a loose-coupling transformer with two coils and using multiple MOSFETs to form a resonant compensation circuit. This method of power transmission through a group of coils and a multi-tube resonant compensation circuit has defects. Since the structures of current small electronic products such as UAVs are diverse and there are many functional parts, when using the conventional loose-coupling transformer method to transmit power to a UAV with a special bracket structure, there are problems such as great operation difficulty, low power transmission efficiency, and difficult structural fit. In addition, using multiple MOSFETs to form a resonant compensation circuit is relatively complex to manufacture, has a high cost, and will also generate heat during the operation of the circuit, resulting in energy loss and other problems. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a wireless power transmission system applicable to a bracket UAV, which overcomes the problems in the prior art such as great operation difficulty, low power transmission efficiency, and difficult structural fit during the charging process of small electronic products such as UAVs, and uses the magnetic coupling four-winding method to complete the power transmission of high-frequency power supply.

[0004] A wireless power transmission system applicable to a bracket UAV includes a high-frequency signal generating device and a cross four-winding solenoid mechanism;

[0005] The high-frequency signal generating device includes a pulse generator, four single-tube high-frequency driving coil modules, and four single-tube high-frequency receiving coil modules;

[0006] The cross four-winding solenoid mechanism is composed of two four-winding solenoids, and the four-winding solenoid includes a primary solenoid and a secondary solenoid;

[0007] The pulse generator is respectively connected to the MOSFETs in the four single-tube high-frequency driving coil modules through four MOS tube driving circuits, and the four single-tube high-frequency driving coil modules are respectively connected to the four single-tube high-frequency receiving coil modules through coil mutual inductance;

[0008] The high-frequency drive coil module includes a first capacitor, a first inductor, and a MOS transistor. The first capacitor is connected in parallel with the first inductor. One end of the parallel combination is connected to the power supply, and the other end is connected to the drain of the MOS transistor. The source of the MOS transistor is grounded, and the gate of the MOS transistor is connected to the MOS transistor drive circuit;

[0009] The high-frequency receiving coil module includes a second capacitor, a third capacitor, a second inductor, and first to fourth diodes. The first diode and the second diode are connected in series, and the third diode and the fourth diode are connected in series. After the series connection, two diode branches are formed. The two diode branches are connected in parallel to form a bridge rectifier circuit. One end of the second capacitor is connected in series with one end of the second inductor, and the other end of the second capacitor and the other end of the second inductor are respectively connected to the two diode branches. The third capacitor is connected in parallel with the diode branch;

[0010] The four single-transistor high-frequency drive coil modules include a first high-frequency drive coil module to a fourth high-frequency drive coil module. The single-transistor high-frequency receiving coil includes a first high-frequency receiving coil module to a fourth high-frequency receiving coil module. The first high-frequency drive coil module to the fourth high-frequency drive coil module are respectively connected to the first high-frequency receiving coil module to the fourth high-frequency receiving coil module through coil mutual inductance;

[0011] The first high-frequency drive coil module and the third high-frequency drive coil module, the second high-frequency drive coil module and the fourth high-frequency drive coil module are used as two complementary modules and respectively wind the coils on a cross-shaped ferrite core to form a primary solenoid. The first high-frequency receiving coil module and the third high-frequency receiving coil module, the second high-frequency receiving coil module and the fourth high-frequency receiving coil module are used as two complementary modules and respectively wind the coils on a cross-shaped ferrite core to form a secondary solenoid, so that magnetic coupling is realized between the primary solenoid and the secondary solenoid;

[0012] The pulse generator is composed of a quaternary counter and a decoder. The generated pulse sequence drives the MOSFETs in the four single-transistor high-frequency drive coil modules through four MOS transistor drive circuits respectively, so as to achieve the purpose that the currents in the first high-frequency drive coil module and the third high-frequency drive coil module, the second high-frequency drive coil module and the fourth high-frequency drive coil module are opposite.

[0013] The cross four-winding solenoid includes a cross-shaped ferrite core and high-frequency drive coils and high-frequency receiving coils wound thereon. The complementary drive coils and receiving coils are wound at opposite positions on the cross-shaped ferrite core to form a primary solenoid and a secondary solenoid, and the current directions in the complementary coils are opposite, generating opposite magnetic fields. Finally, electric energy is transmitted through the magnetic coupling between the primary solenoid and the secondary solenoid.

[0014] The beneficial effects produced by adopting the above technical solution are as follows:

[0015] The present utility model provides a wireless power transmission system applicable to a bracket unmanned aerial vehicle (UAV). A single-tube high-frequency driving coil module is adopted for circuit design, effectively eliminating the reactive power of the power transmission system, improving the energy transmission efficiency, and solving the problems of complex manufacturing of traditional multi-tube resonant compensation circuits, energy loss caused by cost and heat generation during operation. The magnetic coupling device is designed as a solenoid with a four-winding form, not only improving the coupling degree, but also being more suitable for wireless charging of UAVs with special structures such as brackets, solving the problems of difficult fit between traditional coils and electronic device structures and low power transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the wireless power transmission system;

[0017] Figure 2 is a schematic diagram of the high-frequency signal generating device;

[0018] Figure 3 is a schematic diagram of the cross-shaped four-winding solenoid mechanism;

[0019] In the figure, 1 - secondary solenoid, 2 - primary solenoid, 3 - cross-shaped ferrite core, 4 - high-frequency receiving coil module, 5 - high-frequency driving coil module. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0021] A wireless power transmission system applicable to a bracket UAV, as Figure 1 shown, includes a high-frequency signal generating device and a cross-shaped four-winding solenoid mechanism. In this embodiment, the high-frequency signal generating device and the cross-shaped four-winding solenoid mechanism are respectively as Figure 2 and Figure 3 shown;

[0022] The high-frequency signal generating device includes a pulse generator, four single-tube high-frequency driving coil modules, and four single-tube high-frequency receiving coil modules;

[0023] The cross-shaped four-winding solenoid mechanism is composed of two four-winding solenoids, and the four-winding solenoid includes a primary solenoid 2 and a secondary solenoid 1;

[0024] The pulse generator is connected to the MOSFETs in the four single-tube high-frequency driving coil modules through four MOS tube driving circuits respectively, and the four single-tube high-frequency driving coil modules are respectively connected to the four single-tube high-frequency receiving coil modules through coil mutual inductance;

[0025] The high-frequency drive coil module 5 includes a first capacitor, a first inductor, and a MOS transistor. The first capacitor is in parallel with the first inductor. One end of the parallel combination is connected to the power supply, and the other end is connected to the drain of the MOS transistor. The source of the MOS transistor is grounded, and the gate of the MOS transistor is connected to the MOS transistor drive circuit;

[0026] The high-frequency receiving coil module 4 includes a second capacitor, a third capacitor, a second inductor, and first to fourth diodes. The first diode and the second diode are in series, and the third diode and the fourth diode are in series. After series connection, two diode branches are formed, and the two diode branches are connected in parallel to form a bridge rectifier circuit. One end of the second capacitor is in series with one end of the second inductor, and the other end of the second capacitor and the other end of the second inductor are respectively connected to the two diode branches. The third capacitor is in parallel with the diode branch;

[0027] The four single-transistor high-frequency drive coil modules include a first high-frequency drive coil module to a fourth high-frequency drive coil module. The single-transistor high-frequency receiving coil includes a first high-frequency receiving coil module to a fourth high-frequency receiving coil module. The first high-frequency drive coil module to the fourth high-frequency drive coil module are respectively associated with the first high-frequency receiving coil module to the fourth high-frequency receiving coil module through coil mutual inductance;

[0028] The first high-frequency drive coil module and the third high-frequency drive coil module, the second high-frequency drive coil module and the fourth high-frequency drive coil module are used as two complementary modules to wind coils on the cross-shaped ferrite core 3 respectively to form the primary solenoid 2. The first high-frequency receiving coil module and the third high-frequency receiving coil module, the second high-frequency receiving coil module and the fourth high-frequency receiving coil module are used as two complementary modules to wind coils on the cross-shaped ferrite core respectively to form the secondary solenoid 1, so that magnetic coupling is achieved between the primary solenoid and the secondary solenoid;

[0029] The pulse generator is composed of a quaternary counter and a decoder. The generated pulse sequence drives the MOSFETs in the four single-transistor high-frequency drive coil modules through four MOS transistor drive circuits respectively, so as to achieve the purpose that the currents in the first high-frequency drive coil module and the third high-frequency drive coil module, and the second high-frequency drive coil module and the fourth high-frequency drive coil module are opposite.

[0030] The cross four-winding solenoid includes a cross-shaped ferrite core 3 and the high-frequency drive coil module 5 and the high-frequency receiving coil module 4 wound thereon. The complementary drive coils and receiving coils are wound at opposite positions on the cross-shaped ferrite core to form the primary solenoid and the secondary solenoid, and the current directions in the complementary coils are opposite, generating opposite magnetic fields. Finally, electrical energy is transmitted through the magnetic coupling of the primary solenoid and the secondary solenoid.

[0031] In this embodiment, the on / off of the single-tube high-frequency drive coil module is controlled by a MOSFET control circuit. It adopts the method of connecting a capacitor and an inductor in parallel in the circuit. Through a high-frequency signal generating device, the currents in the first high-frequency drive coil module and the third high-frequency drive coil module, and the second high-frequency drive coil module and the fourth high-frequency drive coil module are opposite to each other, forming two complementary modules.

[0032] In this embodiment, the single-tube high-frequency receiving coil module adopts the method of connecting a capacitor and an inductor in series in the circuit, and is then connected to a bridge rectifier device. The currents of the four high-frequency receiving coil modules are finally aggregated at the UAV load to achieve the charging function.

[0033] The above description is only a preferred embodiment of the present disclosure and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the utility model involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above utility model concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the embodiments of the present disclosure.

Claims

1. A wireless power transmission system suitable for supporting drones, characterized in that: It includes a high-frequency signal generating device and a cross four-winding solenoid mechanism; The high-frequency signal generating device includes a pulse generator and four single-tube high-frequency driving coil modules and four single-tube high-frequency receiving coil modules; The cross four-winding solenoid mechanism is composed of two four-winding solenoids, which specifically include a primary solenoid and a secondary solenoid; the pulse generator is connected to the MOS tubes in four single-tube high-frequency driving coil modules through four MOS tube driving circuits, and the four single-tube high-frequency driving coil modules are respectively connected to four single-tube high-frequency receiving coil modules through coil mutual inductance.

2. A wireless power transmission system suitable for a support drone according to claim 1, characterized in that: The high-frequency driving coil module includes a first capacitor, a first inductor, and a MOS tube. The first capacitor and the first inductor are connected in parallel. After the parallel connection, one end is connected to a power supply and the other end is connected to the drain of the MOS tube. The source of the MOS tube is grounded, and the gate of the MOS tube is connected to the MOS tube driving circuit.

3. The wireless power transmission system suitable for a support drone according to claim 1, characterized in that: The high-frequency receiving coil module includes a second capacitor, a third capacitor, a second inductor, and first to fourth diodes. The first diode and the second diode are connected in series, and the third diode and the fourth diode are connected in series to form two diode branches. The two diode branches are connected in parallel to form a bridge rectifier circuit. One end of the second capacitor is connected in series with one end of the second inductor, and the other end of the second capacitor and the other end of the second inductor are respectively connected to the two diode branches, and the third capacitor is connected in parallel with the diode branch.

4. A wireless power transmission system suitable for a support drone according to claim 1, characterized in that: The four single-tube high-frequency driving coil modules include the first high-frequency driving coil module to the fourth high-frequency driving coil module, and the single-tube high-frequency receiving coil includes the first high-frequency receiving coil module to the fourth high-frequency receiving coil module. The first high-frequency driving coil module to the fourth high-frequency driving coil module are respectively connected with the first high-frequency receiving coil module to the fourth high-frequency receiving coil module through coil mutual inductance.

5. A wireless power transmission system suitable for a support drone according to claim 4, characterized in that: The first high-frequency drive coil module and the third high-frequency drive coil module, the second high-frequency drive coil module and the fourth high-frequency drive coil module are two sets of complementary modules, and the coils are respectively wound on a cross-shaped ferrite core to form a primary solenoid.

6. A wireless power transmission system suitable for a support drone according to claim 4, characterized in that: The first high-frequency receiving coil module and the third high-frequency receiving coil module, the second high-frequency receiving coil module and the fourth high-frequency receiving coil module are used as two sets of complementary modules to respectively wind the coils around a cross-shaped ferrite core to form a secondary solenoid.

7. The wireless power transmission system suitable for a support drone according to claim 1, characterized in that: The pulse generator is composed of a quaternary counter and a decoder. The generated pulse sequence drives the MOS tubes in four single-tube high-frequency drive coil modules respectively through four MOS tube drive circuits, so as to achieve the purpose of opposite currents between the first high-frequency drive coil module and the third high-frequency drive coil module, and between the second high-frequency drive coil module and the fourth high-frequency drive coil module.

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