Rectifying circuit suitable for low-voltage alternating current input and high-voltage direct current output

Abstract

The invention belongs to the technical field of rectifying circuits, and relates to a rectifying circuit suitable for low-voltage alternating current input and high-voltage direct current output. The rectifying circuit comprises an interlaced totem pole PFC topological circuit, an interlaced push-pull resonant soft switch topological circuit and an n-shaped filter circuit; the interlaced totem pole PFC topological circuit is electrically connected with the n-shaped filter circuit; and the n-shaped filter circuit is electrically connected with the interlaced push-pull resonant soft switch topological circuit. According to the rectifying circuit suitable for low-voltage alternating current input and high-voltage direct current output, by means of the interlaced totem pole PFC topological circuit and the interlaced push-pull resonant soft switch topological circuit, low-loss rectifying and boosting of large current are achieved, and meanwhile distributed diversion is achieved, input and output high-frequency ripple current is reduced, filtering parameters are reduced, power density and conversion efficiency are improved, cost expenditure related to the circuit is reduced, and production benefits of enterprises can be increased.

Description

【Technical field】 [0001] The invention relates to the technical field of rectification circuits, in particular to a rectification circuit suitable for low-voltage AC input and high-voltage DC output. 【Background technique】 [0002] At present, low-voltage AC needs to be rectified, boosted and converted into high-voltage DC, and then converted to off-grid or grid-connected to realize power generation. Due to the relatively large conduction loss and conversion loss of high-current rectification, and the high-frequency ripple current The processing difficulty is also relatively high, resulting in low conversion efficiency of DC high boost ratio. [0003] Therefore, there are deficiencies in the prior art and need to be improved. 【Content of invention】 [0004] To overcome the above technical problems, the present invention provides a rectifier circuit suitable for low-voltage AC input and high-voltage DC output. [0005] The solution to the technical problem of the present ...

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Problems solved by technology

[0002] At present, low-voltage AC needs to be rectified, boosted and converted into high-voltage DC, and then converted to off-grid or grid-connected to realize power generation. Due to the relatively large conduction loss and conversion loss of high-current rectification, and the high-frequency ripple current The processing difficulty is also relatively high, resulting in low conversion efficiency of DC high boost ratio

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