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Serial hybrid power converter device

A power converter and hybrid power technology, applied in the field of converters, can solve the problems of low system efficiency and high cost of switching devices, and achieve high efficiency

Pending Publication Date: 2021-05-14
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to propose a series hybrid power converter device, which aims to solve the problems of low system efficiency and high cost of switching devices in the widely used two-stage architecture mentioned in the background art

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Embodiment Construction

[0028] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. It should be noted that relative terms such as "first", "second" and so on may be used to describe various components, but these terms do not limit the components. These terms are only used to distinguish one component from another. For example, without departing from the scope of the present invention, a first component may be called a second component, and a second component may similarly be called a first component. The term "and / or" refers to any one or more combination of related items and described items.

[0029] Such as figure 1 , figure 2 As shown, a series hybrid power converter device 100 of the present invention includes an input DC source 101, an isolated power converter 200, a DC / DC converter 103, an output filter 116 and a load 111, and the isolated power converter includes a switch The network 102, ...

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Abstract

The invention discloses a serial hybrid power converter device. The device has the following beneficial effects: 1, according to the serial hybrid power converter device provided by the invention, most power reaches a load through an output filter, and a part of power is subjected to voltage conversion through a DC / DC converter to reach the load; only one part is subjected to voltage regulation through the DC / DC converter; compared with a conventional two-stage power converter (an isolated power converter and a DC / DC converter are cascaded), by using the device of the invention, higher efficiency can be realized; and 2, the voltage stress of the switching device in the DC / DC converter in the serial hybrid power converter is half of the voltage stress of the switching device in the DC / DC converter in the conventional two-stage power converter. Therefore, the device has a price advantage.

Description

technical field [0001] The invention belongs to the technical field of converters, in particular to a series hybrid power converter device. Background technique [0002] At present, since all switching tubes of the LLC resonant DC converter can realize soft switching, it is widely used in high-frequency and high-efficiency occasions. In order to obtain load regulation capability, variable frequency control is widely used in traditional LLC converters. However, frequency conversion control brings problems such as difficulty in optimization of magnetic devices, increase in reactive power, difficulty in synchronous rectification drive logic, and complex design of system electromagnetic compatibility filters. However, when the LLC converter operates at the series resonant frequency, it not only has the highest operating efficiency, but also has the advantages of simple synchronous drive logic, and the voltage transfer ratio becomes completely independent of the actual load, sho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M3/158
CPCH02M3/33592H02M3/158Y02B70/10
Inventor 张东来
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL