Wireless electric energy transmission system and method capable of adjusting load output voltage

Abstract

The invention provides a wireless electric energy transmission system and method capable of adjusting the load output voltage. The system comprises a comparator control circuit, a transmitting-end inversion circuit, a receiving-end rectification circuit and an LC-LC serial resonance network, the peripheral reference voltage of the receiving-end rectification circuit is Vref, the transmitting-end inversion circuit is connected with the receiving-end rectification circuit via the LC-LC serial resonance network, the LC-LC serial resonance network comprises a coil L1 and a resonant capacitor C1 connected in series in the transmitting-end inversion circuit and a coil L2 and a resonant capacitor C2 connected in series in the receiving-end rectification circuit, and the coil L2 is connected withthe comparator control circuit.

Description

technical field [0001] The present invention relates to a wireless power transmission system, in particular to a wireless power transmission system and method capable of adjusting a load output voltage. Background technique [0002] Traditional wireless power transfer systems usually only realize wireless transmission of power. Under the rated load, the output voltage cannot be adjusted, and the application range of the system has certain limitations. At the same time, when the load is light, the transmission power of the system is significantly reduced due to the change of the output voltage, and the performance of wireless power transmission is deteriorated, which cannot meet the requirements of the system. According to system requirements, the general circuit design controls the primary side switch tube through wireless communication or adjusts the voltage through the adjustment of the subsequent stage circuit to achieve the effect of voltage regulation. These operations ...

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Problems solved by technology

Under the rated load, the output voltage cannot be adjusted, and the application range of the system has certain limitations. At the same time, when the load is light, the transmission power of the system is significantly reduced due to the change of the output voltage, and the performance of wireless power transmission is deteriorated, which cannot meet the requirements of the system. System requirements, the general circuit design controls the primary switching tube through wireless communication or adjusts the post-stage circuit to achieve the effect of voltage regulation. These operations will lead to delays in circuit phases or reductions in transmission efficiency

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