High-frequency-multiplication inverter circuit for wireless power transmission
An inverter circuit, high-power technology, applied in the output power conversion device, the conversion of AC power input to DC power output, electrical components and other directions
Active Publication Date: 2015-10-21
ZHEJIANG UNIV
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Problems solved by technology
[0006] Aiming at the above-mentioned technical problems existing in the prior art, the present invention provides a high frequency multiplier inverter circuit for wireless power transmission, which can output alternating current with n times the switching frequency while the switching frequency remains unchanged, avoiding the When the frequency multiplier n of the existing high-frequency inverter circuit is large, the duty cycle of the driving pulse is too small, resulting in the problem that the switching tube cannot output pulses normally.
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[0043] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0044] Such as figure 1 and figure 2 As shown, the high frequency multiplier inverter circuit for wireless power transmission of the present invention includes two DC voltage sources with an amplitude of E, a control circuit 101, n switching bridge arms 102, n inductors 103, and a resonant capacitor 104; Among them, n is the target frequency multiplier, and n is required to be an odd number, and n is 5 in this example.
[0045]Two DC voltage sources with an amplitude of E are connected in series, the negative pole of the first voltage source is connected to the positive pole of the second voltage source, and the connection point of the two is selected as the reference ground; in this example, the amplitude E of the voltage source is 25V .
[0046] Con...
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The invention discloses a high-frequency-multiplication inverter circuit for wireless power transmission. Square wave power signals with certain phase difference are generated through phase shift of multiple bridge arms and are output in a superposed manner, an effect that the inverting output frequency is n times (n is an odd number) of the switching frequency is achieved, and therefore, the problem that the output frequency of a traditional bridge inverter circuit is limited by the switching frequency is solved. According to the invention, high-frequency-multiplication output is realized based on a frequency domain Fourier decomposition and superposition principle, different topological connections are adopted, that the duty ratio of drive pulse is always 1 / 2 under any number of frequency multiplications n is ensured, and the problem in an existing high-frequency inverter circuit that a switching tube cannot output pulse normally due to the fact that the duty ratio of drive pulse is too low when the number of frequency multiplications n is very large is avoided.
Description
technical field [0001] The invention belongs to the technical field of wireless power transmission, and in particular relates to a high frequency multiplier inverter circuit for wireless power transmission. Background technique [0002] With the rapid development of modern information technology, more and more mobile devices, portable devices and implanted devices are widely used in people's lives. These products include mobile phones, notebook computers in the field of consumer electronics, and implants in the field of medical instruments. medical equipment and electric vehicles. However, the power supply of these mobile devices is one of the important problems to be solved today. The traditional wired power transmission method has problems such as wire friction and aging, which affect the life of electrical equipment and the safety of electricity use. In addition, the wired method cannot meet the needs of some special applications, such as the charging of implanted medic...
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Inventor 钱中南王睿驰杜进吴建德何湘宁
Owner ZHEJIANG UNIV