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Non-isolated single-core three-port DC converter

A DC converter and three-port technology, which is applied in the direction of converting DC power input to DC power output, instruments, and adjusting electrical variables, etc., can solve the problems of limited working range and lack of working mode of non-isolated three-port converters , to achieve a wide range of work, good application prospects, and complete functions

Active Publication Date: 2018-03-27
HUBEI INFOTECH SYST TECH CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides two kinds of single magnetic core non-isolated three-port DC converters, the purpose of which is to make the converters have a wider working range and a more flexible working mode, and solve the existing problems. Problems of lack of working mode and limited working range of non-isolated three-port converter

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  • Non-isolated single-core three-port DC converter
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Embodiment Construction

[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0039] Such as figure 1 As shown, the first non-isolated three-port DC converter includes an input source port and an external input voltage source V in , battery port, external battery V b , load port, external load R o , the first to third switching tubes S 1 , S 2 , S 3 , the first to third diodes D 1 、D 2 、D 3 , filter capacitor C o and filter inductance L, where: the first switchi...

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Abstract

The invention discloses two kinds of non-isolation type single-magnetic-core three-port direct current converters. Each of the two kinds of the converters comprises an input source port, a battery port, a load port, a first switching tube, a second switching tube, a third switching tube, a first diode, a second diode, a third diode, a filter capacitor and a filter inductor, and has five kinds of working patterns, wherein the four working patterns have three working modes. According to the converters provided by the invention, the converters are connected with the corresponding input voltage sources, the loads and the batteries; single-stage energy conversion is performed among the ports; the converters have multifunctional unified energy management modes and higher efficiency; the same working pattern can be carried out by different working modes, so that limitation to the port voltage is low; and in addition, the converters are wide in operating range and flexible in working modes.

Description

technical field [0001] The invention belongs to the field of power electronic converters, and more specifically relates to two types of non-isolated single magnetic core multi-structure three-port DC converters in power converters. Background technique [0002] Renewable energy is currently being used more and more widely. However, there are contradictions between the discontinuity and instability of renewable energy and the load that requires stable energy supply. It is necessary to introduce energy storage devices to balance between renewable energy and loads. energy of. Therefore, three-port circuits that can simultaneously connect renewable energy sources, energy storage devices, and loads have attracted extensive attention. The three-port circuit has the advantages of high efficiency, less components, compact structure and unified energy management. In general, three-port circuit topologies can be divided into isolated and non-isolated. In applications without isolat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155
CPCH02M3/155
Inventor 陈宇张鹏程
Owner HUBEI INFOTECH SYST TECH CO LTD
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