Wide-range power adjustable wireless electric energy transmission system and control method thereof

Abstract

The invention discloses a wide-range power adjustable wireless electric energy transmission system and a control method thereof. The system comprises a DC power supply, a high-frequency inversion unit, a fundamental wave energy path, a harmonic wave energy path, a rectification and filtering unit, a primary side control unit and a secondary side control unit. The load needs different output power of the system, the power transmission characteristic of the fundamental wave energy path is different from that of the harmonic wave energy path, and the switching modes of a fundamental wave bidirectional switch S1 in the fundamental wave energy path and a harmonic wave bidirectional switch S2 in the harmonic wave energy channel are controlled; and thus, the system works in a mode that the fundamental wave energy path supplies power independently, a mode that the harmonic wave energy path supplies power independently, and a mode that the fundamental wave energy path and the harmonic wave energy path supply power in parallel, and the output power can be adjusted in a wide range. The system and control method thereof have the advantages that the fundamental wave energy path and the harmonic wave energy path can work in a coordinated manner, the utilization rate of power energy is improved, and the output power can be adjusted in the wide range on the premise that no complex control circuit is arranged additionally.

Description

Technical field [0001] The invention relates to a wireless power transmission system and a control method thereof, in particular to a wide-range power adjustable wireless power transmission system and a control method thereof. Background technique [0002] In recent years, as the theoretical research on wireless power transmission technology continues to deepen, more and more teams have begun to join this big family. Wireless power transmission originated in the late nineteenth century. It was first proposed by Nikola Tesla. In view of its advantages of safety, convenience, and strong adaptability to the environment, as well as its ability to solve application problems in certain specific occasions, it entered People's sight has become a research hotspot in the field of power electronics. [0003] Wireless power transmission systems are mainly divided into three types: electromagnetic induction coupling, magnetic resonance coupling, and microwave radiation. Among them, electromagn...

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Problems solved by technology

However, in these power adjustment methods, it is often necessary to add complex control circuits and configure corresponding algorithms, and power control needs to be performed from the primary side mechanism, while the load is connected to the secondary side mechanism. The physical isolation of the side mechanism makes it difficult to transmit the output power information required by the secondary side mechanism load to the primary side mechanism

Moreover, in these power adjustment methods, the fundamental wave is used for power adjustment, and the idea of ​​system power adjustment has not been considered from the perspective of harmonic utilization.

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