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Isolated bidirectional DC/DC converter and control method thereof

A control method and inverter technology, which are applied in control/regulation systems, DC power input conversion to DC power output, instruments, etc., can solve the problems of large cost and volume, and many resonance parameters, and achieve high flexibility and parameters. The effect of less and lower cost

Pending Publication Date: 2021-09-07
XIAN XJ POWER ELECTRONICS TECH
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Problems solved by technology

[0006] Based on the above situation of the prior art, the purpose of the present invention is to provide an isolated bidirectional DC / DC converter and its control method to solve the problem of multiple resonance parameters of the CLLLC topology in the application of energy bidirectional flow in the prior art. , cost and volume issues

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  • Isolated bidirectional DC/DC converter and control method thereof
  • Isolated bidirectional DC/DC converter and control method thereof
  • Isolated bidirectional DC/DC converter and control method thereof

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Embodiment Construction

[0053] 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 combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0054] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings. According to an embodiment of the present invention, an isolated bidirectional DC / DC converter is provided, the circuit topology diagram of the converter is shown in image 3 As shown, it includes: a DC power supply unit, such as an adjustable DC voltage source, to provide the input volt...

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Abstract

The invention relates to an isolated bidirectional DC / DC converter and a control method thereof. A resonant inductor of a primary side in a CLLC circuit is adjusted to a secondary side, and an auxiliary unit is arranged in the circuit, so that the converter can realize boost and buck conversion during forward and reverse working; meanwhile, gain characteristic curves under different loads and powers during forward power flow and reverse power flow are analyzed, a control strategy applied to a full working range is provided, the isolation type bidirectional DC / DC converter is combined with the control strategy of the full working range, the requirement for a wide-range voltage output occasion can be met, and the soft switching of the device can be well realized in light load.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to an isolated bidirectional DC / DC converter and a control method thereof. Background technique [0002] With the continuous development of the electric vehicle industry, power electronics technology has also developed rapidly, and isolated bidirectional DC / DC converters have also become increasingly popular in applications such as photovoltaic power generation systems, electric vehicle charging systems, and uninterruptible power supply (UPS) systems. The impact on the power grid is becoming more and more significant. V2G technology refers to the technology that electric vehicles send power to the grid. Its core idea is to use the energy storage of a large number of electric vehicles as a buffer for the grid and renewable energy. The realization of V2G technology can not only relieve the pressure of electric vehicle charging on the power grid, but also bring additional be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/33584H02M3/33523Y02B70/10
Inventor 李和宝辛德锋朱兆芳吴金龙
Owner XIAN XJ POWER ELECTRONICS TECH
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