Rotary coupling mechanism for wireless power supply of satellite SADA

Abstract

This invention provides a rotary coupling mechanism for wireless power supply of satellite SADA (Supervisory Automation) systems, comprising a power transmitter and a power receiver. The power transmitter includes a power transmitting circuit and a transmitting coil, while the power receiver includes a power receiving circuit and a receiving coil. The power transmitting circuit is connected to a solar panel, and the power receiving circuit is connected to satellite electrical equipment. The transmitting coil is wound on the outer wall of the inner cylinder, and the receiving coil is wound on the inner wall of the outer cylinder. Both the outer and inner cylinders are made of metal. A signal transmitting circuit is connected to the outer cylinder, and a signal receiving circuit is connected to the inner cylinder. When the inner and outer cylinders are nested, the transmitting and receiving coils face each other, forming a magnetic field coupling to achieve wireless power transmission. Parts of the inner and outer cylinder walls face each other, forming an electric field coupling to achieve wireless signal transmission. Its advantages are: it meets the requirements for energy and signal transmission, has a simple structure, is easy to install, and effectively avoids many problems caused by friction and wear in slip ring structures.

Description

Technical Field

[0001] This invention relates to wireless power transmission technology, and more specifically to a rotary coupling mechanism for wireless power supply of satellite SADA. Background Technology

[0002] As humanity continues to explore the solar system and space, and with the rapid development of aerospace technology, the payload and functions of spacecraft are constantly increasing, and the capacity of their power systems has gradually increased from the 10W to 100W level to the 1kW or even 10kW level.

[0003] The Solar Array Drive Assembly (SADA) is one of the key components of a satellite. It serves as the energy and signal exchange channel between the satellite's interior and the solar panels. As the scale of spacecraft systems continues to increase, the requirements for the spacecraft's energy systems are also becoming more demanding. Figure 1 As shown, most existing satellite SADA systems use contact-type mechanical slip rings for connection, and the main problem with this is:

[0004] (1) Sliding friction causes slip ring wear, affecting equipment lifespan;

[0005] (2) Metal scraps generated by slip ring wear can easily cause power supply failure or even short circuit adhesion.

[0006] (3) The slip ring layout for multiple energy and signal channels also has high space requirements. Summary of the Invention

[0007] Based on the above requirements, the purpose of this invention is to propose a rotary coupling mechanism for wireless power supply of satellite SADA, which solves the wear problem caused by contact transmission through wireless power transmission and wireless signal transmission.

[0008] To achieve the above objectives, the specific technical solution adopted by the present invention is as follows:

[0009] A rotary coupling mechanism for wireless power supply of satellite SADA includes a power transmitter and a power receiver. The key feature is that the power transmitter is equipped with a power transmitting circuit and a transmitting coil, and the power receiver is equipped with a power receiving circuit and a receiving coil. The power transmitting circuit is connected to a solar panel, and the power receiving circuit is connected to satellite electrical equipment. The transmitting coil is wound on the outer wall of an inner cylinder, and the receiving coil is wound on the inner wall of an outer cylinder. Both the outer and inner cylinders are made of metal. A signal transmitting circuit is connected to the outer cylinder, and a signal receiving circuit is connected to the inner cylinder. When the inner and outer cylinders are nested, the transmitting coil and the receiving coil face each other, forming a magnetic field coupling to achieve wireless power transmission from the power transmitter to the power receiver. Conversely, a portion of the inner and outer cylinder walls face each other, forming an electric field coupling to achieve wireless signal transmission from the power receiver to the power transmitter.

[0010] Optionally, the power transmitting circuit includes a primary-side rectifier module, a primary-side power conversion circuit, a high-frequency inverter circuit, and a primary-side resonant compensation circuit, and the power receiving circuit includes a secondary-side resonant compensation circuit, a secondary-side high-frequency rectifier module, and a secondary-side power conversion module.

[0011] Optionally, the signal transmitting circuit includes a signal modulation circuit and a power discharge circuit, and the signal receiving circuit includes a bandpass filter circuit, an operational amplifier circuit, an envelope detector circuit, and a voltage comparator circuit.

[0012] Optionally, the outer cylinder and the inner cylinder are cylindrical, and an annular groove is provided on the inner wall of the outer cylinder and the outer wall of the inner cylinder respectively. A primary annular magnetic core in the shape of "[" is provided in the groove on the outer wall of the inner cylinder, and a secondary annular magnetic core in the shape of "[" is provided in the groove on the inner wall of the outer cylinder. The transmitting coil is wound on the outer surface of the primary annular magnetic core, and the receiving coil is wound on the inner surface of the secondary annular magnetic core.

[0013] Optionally, the convex rings at both ends of the groove on the outer wall of the inner cylinder are aligned with the convex rings at both ends of the groove on the inner wall of the outer cylinder to form a single-capacitor coupling structure to realize wireless signal transmission from the power receiving end to the power transmitting end.

[0014] Optionally, an air gap of a first preset distance is reserved between the outer wall protrusion of the inner cylinder and the inner wall protrusion of the outer cylinder, and the air gap between the transmitting coil and the receiving coil is greater than the first preset distance.

[0015] Optionally, the first preset spacing is 10mm.

[0016] The effects of this invention are:

[0017] This invention proposes a rotary coupling mechanism for wireless power supply of satellite SADA. Based on the sleeve-type wireless power coupling mechanism, it utilizes the electric field coupling effect of the sleeve itself to achieve signal transmission. It has a simple structure, is easy to install, and effectively avoids many problems caused by friction and wear of slip ring structures. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below.

[0019] Figure 1 This is a schematic diagram of the existing satellite SADA connection structure.

[0020] Figure 2 This invention provides a schematic diagram of a rotary coupling mechanism for wireless power supply of satellite SADA.

[0021] Figure 3 This is a schematic diagram of the coupling mechanism structure of the power transmitting end in a specific embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the coupling mechanism structure of the power receiving end in a specific embodiment of the present invention;

[0023] Figure 5 This is a longitudinal sectional view of the coupling mechanism in a specific embodiment of the present invention;

[0024] Figure 6 This is a cross-sectional view of the coupling mechanism in a specific embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the power transmitting circuit and the power receiving circuit in a specific embodiment of the present invention;

[0026] Figure 8 This is a schematic block diagram of the signal transmitting circuit and the signal receiving circuit in a specific embodiment of the present invention;

[0027] Figure 9 This is a diagram illustrating the effect of signal transmission in a specific embodiment of the present invention. Detailed Implementation

[0028] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0029] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by those skilled in the art to which this invention pertains.

[0030] This embodiment provides a rotary coupling mechanism for wireless power supply of satellite SADA, such as Figures 2-6 As shown, the device includes a power transmitter and a power receiver. The power transmitter is equipped with a power transmitting circuit and a transmitting coil, and the power receiver is equipped with a power receiving circuit and a receiving coil. The power transmitting circuit is connected to a solar panel, and the power receiving circuit is connected to satellite electrical equipment. The transmitting coil is wound on the outer wall of the inner cylinder, and the receiving coil is wound on the inner wall of the outer cylinder. Both the outer and inner cylinders are made of metal. A signal transmitting circuit is connected to the outer cylinder, and a signal receiving circuit is connected to the inner cylinder. When the inner and outer cylinders are nested, the transmitting coil and the receiving coil face each other to form a magnetic field coupling, realizing wireless power transmission from the power transmitter to the power receiver. Parts of the inner and outer cylinder walls face each other to form an electric field coupling, realizing wireless signal transmission from the power receiver to the power transmitter.

[0031] Combination Figure 3 , Figure 4 , Figure 5 and Figure 6 As can be seen, in specific implementation, the outer cylinder and the inner cylinder are cylindrical. A corresponding annular groove is provided on the inner wall of the outer cylinder and the outer wall of the inner cylinder. A "["-shaped primary annular magnetic core is provided in the groove on the outer wall of the inner cylinder, and a "["-shaped secondary annular magnetic core is provided in the groove on the inner wall of the outer cylinder. The transmitting coil is wound on the outer surface of the primary annular magnetic core, and the receiving coil is wound on the inner surface of the secondary annular magnetic core. The convex rings at both ends of the groove on the outer wall of the inner cylinder and the convex rings at both ends of the groove on the inner wall of the outer cylinder are aligned to form a single-capacitor coupling structure to realize wireless signal transmission from the power receiving end to the power transmitting end. In specific implementation, an air gap of a first preset distance is reserved between the convex rings on the outer wall of the inner cylinder and the convex rings on the inner wall of the outer cylinder, and the air gap between the transmitting coil and the receiving coil is greater than the first preset distance.

[0032] Specifically, the receiving electrode in the inner cylinder has an inner diameter of 20mm, an outer diameter of 60mm, a thickness of 10mm for the middle groove, a thickness of 20mm for the protruding parts at both ends, an overall height of 120mm for the inner cylinder, a groove length of 80mm, an inner diameter of 40mm for the primary magnetic core, a thickness of 5mm for the middle section of the primary magnetic core, and a length of 40mm for the middle section of the primary magnetic core.

[0033] The inner diameter of the transmitting electrode in the outer cylinder is 80mm and the outer diameter is 120mm. The air gap between the inner and outer cylinders is 10mm, which is the first preset gap of 10mm. The outer diameter of the secondary magnetic core is 110mm and the thickness of the middle section of the secondary magnetic core is 5mm. The other dimensions are set to correspond to the primary magnetic core.

[0034] pass Figure 2 and Figure 7As can be seen, the power transmitting circuit includes a primary-side rectifier module, a primary-side power conversion circuit, a high-frequency inverter circuit, and a primary-side resonant compensation circuit, while the power receiving circuit includes a secondary-side resonant compensation circuit, a secondary-side high-frequency rectifier module, and a secondary-side power conversion module.

[0035] pass Figure 8 As can be seen, the signal transmitting circuit includes a signal modulation circuit and a power discharge circuit, and the signal receiving circuit includes a bandpass filter circuit, an operational amplifier circuit, an envelope detector circuit, and a voltage comparator circuit.

[0036] As can be seen from the above structure, using the coupling mechanism provided by this invention, the inner and outer cylinders can be rotatably connected during the rotation of the solar panel. The electrical energy acquired by the solar panel can be wirelessly transmitted through the transmitting coil on the inner cylinder and the receiving coil on the outer cylinder. When the satellite control system needs to send control commands to the solar panel, wireless signal transmission can be achieved between the outer and inner cylinders using the single-capacitor coupling effect generated by the metal sleeve. Figure 9 The diagram shows the signal transmission effect obtained from the experimental test. The signal transmitting circuit and signal receiving circuit provided in this embodiment can achieve accurate signal transmission.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and such transformations should be covered within the scope of the claims and specification of the present invention.

Claims

1. A rotary coupling mechanism for satellite SADA wireless power supply, comprising an electric energy transmitting end and an electric energy receiving end, characterized in that, The power transmitting end is equipped with a power transmitting circuit and a transmitting coil, and the power receiving end is equipped with a power receiving circuit and a receiving coil. The power transmitting circuit is connected to the solar panel, and the power receiving circuit is connected to the satellite electrical equipment. The transmitting coil is wound on the outer wall of the inner cylinder, and the receiving coil is wound on the inner wall of the outer cylinder. The outer cylinder and the inner cylinder are made of metal. A signal transmitting circuit is connected to the outer cylinder, and a signal receiving circuit is connected to the inner cylinder. When the inner cylinder and the outer cylinder are nested, the transmitting coil and the receiving coil face each other to form a magnetic field coupling, realizing wireless power transmission from the power transmitting end to the power receiving end. Parts of the inner cylinder and the outer cylinder face each other to form an electric field coupling, realizing wireless signal transmission from the power receiving end to the power transmitting end. The outer cylinder and the inner cylinder are cylindrical. A section of annular groove is provided on the inner wall of the outer cylinder and the outer wall of the inner cylinder respectively. A primary annular magnetic core in the shape of "[" is provided in the groove on the outer wall of the inner cylinder, and a secondary annular magnetic core in the shape of "[" is provided in the groove on the inner wall of the outer cylinder. The transmitting coil is wound on the outer surface of the primary annular magnetic core, and the receiving coil is wound on the inner surface of the secondary annular magnetic core. The convex rings at both ends of the groove on the outer wall of the inner cylinder are aligned with the convex rings at both ends of the groove on the inner wall of the outer cylinder to form a single capacitor coupling structure to realize wireless signal transmission from the power receiving end to the power transmitting end. An air gap of a first preset distance is reserved between the outer wall protrusion of the inner cylinder and the inner wall protrusion of the outer cylinder, and the air gap between the transmitting coil and the receiving coil is greater than the first preset distance.

2. The rotating coupling mechanism for satellite SADA wireless power supply according to claim 1, characterized in that, The power transmitting circuit includes a primary-side rectifier module, a primary-side power conversion circuit, a high-frequency inverter circuit, and a primary-side resonant compensation circuit. The power receiving circuit includes a secondary-side resonant compensation circuit, a secondary-side high-frequency rectifier module, and a secondary-side power conversion module.

3. The rotating coupling mechanism for satellite SADA wireless power supply of claim 1, wherein, The signal transmitting circuit includes a signal modulation circuit and a power discharge circuit, and the signal receiving circuit includes a bandpass filter circuit, an operational amplifier circuit, an envelope detector circuit, and a voltage comparator circuit.

4. The rotating coupling mechanism for satellite SADA wireless power supply of claim 1, wherein, The first preset spacing is 10mm.

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