Distance optimization method of dual-source wireless power supply system based on minimum standard deviation of power fluctuation
A wireless power supply and standard deviation technology, applied in the application field of wireless power transmission technology, can solve the problems of increasing system complexity and rapid output power attenuation
Active Publication Date: 2018-03-13
SOUTHEAST UNIV
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Problems solved by technology
In order to solve this problem, many scholars have also proposed methods or technical means such as impedance matching, dynamic frequency modulation, and tracking control. Although they have a good practical effect in short-distance transmission, they undoubtedly increase the complexity of the system. At present, the rapid output power attenuation of the single-source wireless power supply system during long-distance transmission is still a technical difficulty
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[0017] The present invention will be further explained below in conjunction with the accompanying drawings.
[0018] A distance optimization method for a dual-source wireless power supply system, the dual-source wireless power supply system such as figure 1 As shown, it includes two transmitting ends and one receiving end. The transmitting ends are respectively composed of a resonant capacitor, a high-frequency power supply and a transmitting coil in series. The parameters of the two transmitting coils Tx1 and Tx2 are the same and coaxially set. The receiving end is composed of a receiving coil Rx1, a resonant capacitor and a load. The size of the receiving coil is smaller than that of the two transmitting coils and coaxial with the transmitting coil. The position of the receiving coil can be moved between the two transmitting coils. Both transmitters can wirelessly transmit power to the receiver through magnetic coupling resonance, thereby supplying power to the load at the r...
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The present invention proposes a distance optimization method for a dual-source wireless power supply system based on the minimum standard deviation of power fluctuations, wherein the wireless energy transmission device of the dual-source wireless power supply system includes two large-sized transmitting coils and one small-sized receiving coil. According to the given operating frequency, coil parameters and load size, the optimal distance between the two transmitting coils can be determined, and the voltage of the high-frequency power supply can be further determined according to the load power. The dual-source wireless power supply system obtained by using this optimization strategy can provide stable power for loads at different distances at a fixed operating frequency, and solve the problem of power fluctuations caused by distance changes in existing single-source wireless power supply systems. Applicable to the field of mobile device power supply.
Description
technical field [0001] The invention belongs to the application field of wireless power transmission technology, and in particular relates to a distance optimization method for a dual-source wireless power supply system. Background technique [0002] The development of wireless power transmission technology has significantly improved the spatial freedom of energy supply, and made it possible to remove the last cable (ie power cord) of electronic equipment. In 2007, the MIT research team proposed the magnetically coupled resonant WPT technology, which provides a new solution for the development of medium-range wireless power transmission technology. They use two coils with the same natural resonant frequency to transmit energy, which is different from traditional electric power transmission. Compared with the magnetic induction WPT, it can significantly improve the transmission efficiency of the resonator and effectively reduce the electromagnetic loss in the space. Once this...
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IPC IPC(8): H02J50/12
Inventor 谭林林郭金鹏黄学良闻枫
Owner SOUTHEAST UNIV