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A kind of ac/dc converter based on multiplexing inductor

A converter and inductor technology, applied in the field of AC/DC converters based on multiplexed inductors, can solve problems such as increasing costs and achieve the effect of reducing costs

Active Publication Date: 2020-03-10
SHANGHAI MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If you want to solve the above problems, you must Figure 4 A DC voltage balance adjustment circuit is added to the circuit shown, which increases the cost

Method used

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  • A kind of ac/dc converter based on multiplexing inductor
  • A kind of ac/dc converter based on multiplexing inductor
  • A kind of ac/dc converter based on multiplexing inductor

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Embodiment Construction

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0038] In view of the defects of the grounding structure of the AC / DC converter applied to the DC microgrid in the prior art, especially for Figure 4 Due to the defects of the AC / DC converter with combined grounding structure shown, the present invention provides a novel AC / DC converter based on multiplexed inductors. The main idea of ​​the...

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Abstract

The invention relates to an AC / DC current converter based on a reuse inductor, and belongs to the field of power electronics. The current converter mainly comprises a current conversion circuit, a control circuit, and a detection circuit. The current conversion circuit comprises a first power switch, a second power switch, a third power switch, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a first inductor, a filter capacitor, and a smoothing capacitor. The control circuit controls the on / off of the first, second and third power switches according to a DC voltagewhich is collected by the detection circuit and is outputted by the current conversion circuit and a grid voltage of a grid AC power supply, so as to control the current conversion circuit to work ina step-up working mode, a step-down working mode and a step-up / step-down working mode. According to the invention, a combined grounding structure is employed between an AC side and a DC side, and theconverter just needs three power switches. The converter is high in utilization rate of inductance, is low in cost, is small in DC side voltage-stabilizing capacitance, and is small in output DC voltage ripples.

Description

technical field [0001] The invention relates to an AC / DC converter, in particular to an AC / DC converter based on multiplexed inductance. Background technique [0002] The AC / DC converter is mainly used to convert the AC output from the AC grid or the AC generated by the distributed power generation system into the DC required by the DC microgrid. In the prior art, grounding methods of AC / DC converters applied to DC microgrids can generally be classified into combined grounding structures, unilateral grounding structures, virtual isolation grounding structures, and the like. [0003] figure 1 The joint grounding structure of AC / DC converter in DC microgrid is given. In this structure, the AC high voltage first passes through the split-phase transformer T 1 The AC low voltage is reduced to 110V, and then the AC low voltage is connected to the AC / DC converter for AC / DC conversion, and finally provides power to the DC microgrid. Among them, the AC low-voltage system and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/217H02M1/088H02M1/12
CPCH02M1/088H02M1/12H02M7/217
Inventor 吴卫民王侯清安丽琼
Owner SHANGHAI MARITIME UNIVERSITY
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