Mutual coupling capacitance feedback type integral closed-loop magnetic coupling wireless power supply device, system and method
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A technology of wireless power supply and capacitive feedback, applied in the direction of circuit devices, electrical components, etc., can solve problems such as the need for additional transmission devices, far-field radiation, and susceptibility to interference, and achieve high system stability, good anti-interference performance, and anti-interference good disruptive effect
Pending Publication Date: 2022-03-01
XIDIAN UNIV +1
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[0009] In order to achieve the above purpose, the present invention provides a mutual coupling capacitive feedback type overall closed-loop magnetic coupling wireless power supply device, system and method, adopts a feedback method different from the prior art, and proposes an energy transfer / Feedback integrated coupling structure, which can effectively shield the stray interference of its electric field without affecting the penetration of the energy transfer magnetic field, and at the same time provide an undisturbed capacitive coupling feedback channel; secondly, it is proposed to use the capacitive coupling channel to The overall closed-loop circuit that feeds back the output voltage / current in real time solves the problems of far-field radiation, susceptibility to interference, need for additional transmission devices, and influence by dielectric barriers in the prior art.
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Embodiment 1
[0053] Such as Figure 8 As shown in , it is a wireless power supply device with constant voltage output, which is mainly used in applications where constant voltage output is required at the receiving end. In this embodiment, the constant voltage output of the overall feedback of wireless power supply is completed by using the feedback method of the present invention; the following parameter indicators are realized:
[0054] (1) Input voltage: 24V-32V;
[0055] (2) Output voltage: 28V±5%;
[0056] (3) Maximum output power: 300W;
[0057] (4) Transmission distance: ≤8mm;
[0058] Under the working conditions of DC / AC high-frequency inverter frequency of 20kHz and a gap of 5mm, ferrite 100*100*10 is selected as the magnetic material 1-3 of the transmitting end and the magnetic material 2-3 of the receiving end; The magnetic field coupling coil 1-1 at the end has 12 turns, and the magnetic field coupling coil 2-1 at the receiving end has 8 turns, both of which are wound with...
Embodiment 2
[0062] Such as Figure 9 As shown, it is a wireless power supply device with constant current and constant voltage output, which is used in a wireless power supply system for charging 6 lithium-ion batteries in series (single full charge 4.2V). In this embodiment, the feedback method of the present invention is used to complete the constant current and voltage limiting output of the overall feedback of the wireless power supply, and the following parameter indicators are realized:
[0063] (1) Input voltage: 24V-32V;
[0064] (2) Output current: 4A;
[0065] (3) Open circuit voltage: 25.2V;
[0066] (4) Maximum output power: 100W;
[0067] (5) Maximum transmission distance: ≤10mm;
[0068] Under the working condition of DC / AC high-frequency inverter with a frequency of 40kHz and a floating gap of 0-10mm, ferrite 80*80*10 is selected as the magnetic material 1-3 of the transmitting end and the magnetic material 2-3 of the receiving end ;Choose 1-1 turns of the magnetic fie...
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Abstract
The invention discloses a mutual coupling capacitance feedback type integral closed-loop magnetic coupling wireless power supply device, system and method, and the device comprises a transmitting end and receiving end integrated coupling device which comprises a pair of magnetic field coupling coils, and transmitting end and receiving end electric field coupling grids are disposed on the sides, close to each other, of the transmitting end and receiving end magnetic field coupling coils. The sides, away from each other, of the transmitting end magnetic field coupling coil and the receiving end magnetic field coupling coil are provided with transmitting end magnetic materials and receiving end magnetic materials, the sides, away from each other, of the transmitting end magnetic materials and the receiving end magnetic materials are provided with transmitting end metal shells and receiving end metal shells, and a mutual coupling capacitance path is formed between the transmitting end metal shells and the receiving end metal shells. According to the mutual coupling capacitance feedback type overall closed-loop magnetic coupling wireless power supply device, system and method, an energy transfer/feedback integrated coupling structure with a selective shielding function is provided, and the structure can effectively shield stray interference of an electric field on the premise that penetration of an energy transfer magnetic field is not affected, so that the reliability of the power supply is improved. And meanwhile, a capacitive coupling feedback channel which is not interfered is provided.
Description
technical field [0001] The invention belongs to the technical field of wireless power supply, and relates to a mutual coupling capacitive feedback type integral closed-loop magnetic coupling wireless power supply device, system and method. Background technique [0002] At present, magnetic coupling wireless power supply technology has been widely used in the field of consumer electronics, such as mobile phones and tablet computers, and is emerging in the fields of electric vehicles, industrial technology, aerospace and other fields, such as wireless charging pile technology for electric vehicles, non-contact energy transmission Machine rotary joints, non-contact wireless power transmission, etc. In most wireless power supply applications, the receiving end is required to provide a stable voltage or current to the load, such as providing constant voltage power supply to embedded systems or constant current charging to lithium batteries. In order to overcome the impact of inp...
Claims
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