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Soft-switching bidirectional phase-shifting converter with extended load range

A load range, converter technology, applied in the output power conversion device, the conversion of AC power input to DC power output, the conversion of DC power input to DC power output, etc. The efficiency becomes lower and other problems, to achieve the effect of controlling the output characteristics, realizing the linear control output, and optimizing the control and topology.

Active Publication Date: 2017-11-14
HONG KONG PRODUCTIVITY COUNCIL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, including the above-mentioned inventions, the current social and academic research on phase-shift converters has not solved the problem of low-efficiency phase-shift converters under light load conditions, and cannot achieve output linear control

Method used

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  • Soft-switching bidirectional phase-shifting converter with extended load range
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  • Soft-switching bidirectional phase-shifting converter with extended load range

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Embodiment Construction

[0026] In order to facilitate a further understanding of the structure and effects of the present invention, preferred embodiments are described in detail below in conjunction with the accompanying drawings.

[0027] figure 1 It is a schematic diagram of the topology of the phase-shift converter based on the zero-voltage current switching technology of the present invention, which is the core component of the electric vehicle charger. Such as figure 1 As shown, the topology of the present invention is based on the traditional DC-DC phase-shift converter, and the output diode rectifier bridge side is changed to use a switch tube with a reverse diode to control. The bidirectional phase-shift converter of the present invention includes an inverter bridge and a rectifier bridge, a transformer T is connected between the output side of the inverter bridge and the input side of the rectifier bridge, representing the equivalent inductance L of the leakage inductance of the primary si...

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Abstract

The invention discloses a soft-switching bidirectional phase-shifting converter with an extended load range. The soft-switching bidirectional phase-shifting converter comprises an inverter bridge, a rectifier bridge, a transformer and an equivalent inductor, wherein the transformer is connected between an output side of the inverter bridge and an input side of the rectifier bridge, the equivalent inductor expresses primary side leakage inductance of the transformer, an input side of the inverter bridge has a DC input voltage, and an output side of the rectifier bridge is connected with an output load. The soft-switching bidirectional phase-shifting converter disclosed by the invention can be applied to a light load situation, and does not affect the operation under a heavy load condition, thereby expanding the available load range of a charger. The soft-switching bidirectional phase-shifting converter can realize the linear control output under the condition of optimal control and topology, and is more conductive to controlling output features of the charger.

Description

technical field [0001] The invention relates to a phase-shift converter based on zero-voltage switching and zero-current switching technology, in particular to a system for fast charging of electric vehicles in multiple occasions, which can realize output linear control and a soft output load range. Switching bidirectional phase shift converter. Background technique [0002] At present, the electric vehicle industry is developing rapidly and has broad prospects, and the corresponding fast charging technology is indispensable. It is very important to develop high-performance fast car charging piles. Among various types of DC-DC converters, the phase-shift converter has the advantages of low loss, high power density, fixed frequency, and easy control, so it is often used as the basic topology of electric vehicle chargers. However, due to the limitations of the phase-shift converter topology itself, its output efficiency is low under light load conditions, and even affects the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M7/5387H02M7/219
CPCH02M3/33523H02M7/219H02M7/5387H02M1/0058H02M3/33584Y02B70/10
Inventor 续文政陈汉隆陈家荣
Owner HONG KONG PRODUCTIVITY COUNCIL
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