Dynamic wireless charging apparatus and parameter acquiring method thereof

Abstract

The invention discloses a dynamic wireless charging apparatus and a parameter acquiring method thereof. The dynamic wireless charging apparatus comprises an energy emitting module and an energy receiving module. The energy emitting module comprises a high-frequency inversion unit, an LC filter unit, a first compensation unit, and a power emitting coil which are successively connected. The high-frequency inversion unit converts DC power into high-frequency AC power. After the high-frequency AC power is adjusted by the LC filter unit and the first compensation unit, energy is emitted in a high-frequency magnetic field coupling mode. The energy receiving module comprises a power receiving coil, a second compensation unit, and an uncontrolled rectification unit which are successively connected, and converts received high-frequency AC power into DC power supplied to a load. The dynamic wireless charging apparatus may automatically adjust the current of a primary-side power coil according to the mutual inductance coupling degree of the power coil so as to obtain a characteristic maintaining stable output power, is suitable for dynamic wireless charging application occasions with a wide bias, and has high transmission efficiency and a soft switch characteristic. In addition, compensation topology provides a primary side inversion power supply with a zero-load current-limiting protection function.

Description

technical field [0001] The invention belongs to the technical field of wireless power transmission, and relates to a dynamic wireless power transmission device with a wide offset range and a parameter acquisition method thereof, which is suitable for wireless charging occasions where the transmission distance has a certain offset range and the transmission power has a certain stability requirement. Background technique [0002] In recent years, wireless power transmission technology (WirelessPowerTransfer, WPT) and electric vehicle technology (ElectricVehicle, EV) have achieved rapid development. Magnetic coupling wireless power transmission technology transfers energy through the high-frequency alternating magnetic field coupling between power transceiver coils. It is the most promising wireless power transmission technology and has been widely used in low-power portable electronic devices, such as mobile phones and cardiac pacemakers. device etc. With the further improvem...

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Problems solved by technology

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to provide a device for dynamic wireless charging and its parameter acquisition method, aiming to solve the problem that the transmission power in the existing wireless power transmission system tends to fluctuate violently with the offset distance. The problem of insufficient anti-offset ability of the existing compensation topology

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