Bidirectional LLC resonant direct current-direct current converter

A DC converter and resonant DC technology, which is applied in the direction of converting DC power input to DC power output, instrumentation, and adjusting electrical variables, can solve the problem of overall circuit performance degradation and other issues

Active Publication Date: 2018-04-06
杭州芯云半导体技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore when the reverse operation of the CLLC circuit, the circuit works in area 2, i.e. the current continuous mode, and the overall performance of the circuit decreases

Method used

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  • Bidirectional LLC resonant direct current-direct current converter
  • Bidirectional LLC resonant direct current-direct current converter
  • Bidirectional LLC resonant direct current-direct current converter

Examples

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Embodiment Construction

[0053] The present invention will be further described below with reference to the drawings and embodiments. For the convenience of description, in all the following embodiments, it is assumed that the amplitude of the primary DC voltage signal V1 ranges from V1min to V1max, and the secondary DC voltage signal V2 remains unchanged.

[0054] reference image 3 A schematic diagram of the first embodiment of the two-way LLC resonant DC-DC converter according to the present invention is shown. The two-way LLC resonant DC-DC converter includes: a primary side resonant conversion network 301, a transformer T, and a secondary side resonant conversion network 302 Further, the transformer T includes a primary winding Wp, a first secondary winding Ws1, and a second secondary winding Ws2.

[0055] Further, the primary side resonant conversion network 301 includes a primary side bridge arm 3001, a primary side filter capacitor Ci, a first resonant inductor Lr1, and a first resonant capacitor C...

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Abstract

The invention discloses a bidirectional LLC resonant direct current-direct current converter. The bidirectional LLC resonant direct current-direct current converter comprises a primary resonant conversion network which is used for converting an input primary direct current voltage signal into a primary high frequency alternating current signal when energy is transmitted in a forward direction andconverting the input primary high frequency alternating current signal into the primary direct current voltage signal when the energy is transmitted in a reverse direction; a secondary resonant conversion network which is used for converting an input secondary direct current voltage signal into a secondary high frequency alternating current signal when energy is transmitted in the reverse direction and converting the input secondary high frequency alternating current signal into the secondary direct current voltage signal when the energy is transmitted in the forward direction; and a transformer which at least comprises a primary winding and two secondary windings. When the energy is transmitted in the forward direction, only one secondary winding participates in energy transmission. Whenthe energy is transmitted in the reverse direction, both of the two secondary winding participates in the energy transmission. The bidirectional LLC resonant direct current-direct current converter works in an intermittent mode when the energy is transmitted in the forward direction and when the energy is transmitted in the reverse direction. The efficiency is improved.

Description

Technical field [0001] The invention belongs to a bidirectional DC-DC converter, specifically, a high-efficiency LLC resonant DC-DC converter, which is suitable for application fields such as energy storage and new energy power generation. Background technique [0002] As the world's energy resources shrink and environmental pollution increases, the development and utilization of new energy has become an urgent problem for mankind. For renewable energy, how to connect these new energy sources to the grid for power generation and transform them into electrical energy that users can directly use is the main research direction in the field of distributed power generation. Since distributed energy does not have its own energy storage function, most of today's distributed power generation systems contain auxiliary storage systems, thus forming a composite power generation system containing energy storage systems. [0003] For the auxiliary energy storage system, if a non-isolated conve...

Claims

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Application Information

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IPC IPC(8): H02M3/335
CPCH02M3/3353H02M1/0054Y02B70/10
Inventor 谢小高江帅董汉菁
Owner 杭州芯云半导体技术有限公司
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