Wireless electric energy transmission system with switchable resonance compensation topology and control method thereof

Abstract

The invention discloses a wireless electric energy transmission system with a switchable resonance compensation topology and a control method thereof. The system comprises a direct current power supply, a high frequency inversion mechanism, a primary side compensation mechanism, an electromagnetic coupling mechanism, a secondary side switching mechanism, a high frequency rectification mechanism, a load, a primary side control mechanism and a secondary side control mechanism. The system is characterized in that according to a power supply characteristic needed by a load or difference of power efficiency output requirements, through controlling connection and disconnection of a bidirectional switch in the secondary side switching mechanism, topology structure switching is performed; and the system can work in three kinds of working modes which are constant current output, constant voltage output and high power and high efficiency output. The system has advantages that the system can flexibly switch system working modules according to the power supply characteristic needed by load power supply or a power efficiency output requirement so as to satisfy power supply requirements of various types of loads; single resonance compensation topology restrictions are effectively overcome and a system application occasion is widened.

Description

technical field [0001] The invention relates to a novel wireless power transmission system, in particular to a wireless power transmission system with switchable resonance compensation topology and a control method thereof. Background technique [0002] In view of the advantages of safety, convenience, and strong adaptability to the environment, wireless power transmission technology has become a hot research topic in the field of power electronics, and its theoretical system is also constantly developing and improving. Among them, the electromagnetic induction wireless power transmission technology develops the fastest and is the most widely used. It uses high-frequency magnetic field to transmit energy in the magnetic circuit mechanism, so as to realize the physical isolation between the primary side transmitter and the secondary side pickup side. [0003] It can be seen that the magnetic circuit mechanism of the wireless power transfer system is the core of the wireless p...

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Problems solved by technology

Therefore, when the power supply characteristics or power efficiency output requirements required by the load are different, the wireless power transmission system with a single resonance compensation topology cannot meet its application occasions. At present, there is no research and invention that can improve this situation at home and abroad.

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