A bidirectional multilevel buck-boost converter and its control method

A buck-boost converter and control method technology, applied in the direction of adjusting electric variables, control/regulation systems, converting DC power input to DC power output, etc., can solve problems such as engineering implementation difficulties

Active Publication Date: 2017-06-16
NO 719 RES INST CHINA SHIPBUILDING IND
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Problems solved by technology

Among them, the bidirectional forward converter and the bidirectional flyback converter are mainly used in small and medium power applications, while the double-ended active bridge converter is mainly suitable for medium power applications. If it needs to be used in high power applications, multiple converters need to work in parallel. Difficulty in engineering realization

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  • A bidirectional multilevel buck-boost converter and its control method
  • A bidirectional multilevel buck-boost converter and its control method
  • A bidirectional multilevel buck-boost converter and its control method

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Embodiment Construction

[0046] The technical solution of the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0047] The main circuit topology of the bidirectional multilevel buck-boost converter described in the present invention is as follows: figure 1 As shown, the control method adopted is as follows figure 2 shown. When energy flows in the forward direction, the power supply V 1 flow to the power supply V 2 , can control the voltage V 2 or inductor current, when the voltage V 1 higher than V 2 When, the converter works in forward step-down mode, when the voltage V 1 below V 2 When , the converter works in the positive boost mode; when the energy flows in the reverse direction, the power supply V 2 flow to the power supply V 1 , can control the voltage V 1 or inductor current, when the voltage V 2 higher than V 1 When, the converter works in reverse step-down mode, when the voltage V 2 below V 1 , the converter works in rever...

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Abstract

The present invention relates to a bidirectional multilevel buck-boost converter and its control method, which is characterized in that it comprises a bidirectional three-level unit A(1), a bidirectional three-level unit B(2), an inductor L b (3) and the control system, the bidirectional three-level unit A (1) includes a switching tube T 1 , switch tube T 2 , switch tube T 3 , switch tube T 4 and voltage dividing capacitor C b1 、C b2 ; The bidirectional three-level unit B(2) includes a switching tube T 5 , switch tube T 6 , switch tube T 7 , switch tube T 8 and voltage dividing capacitor C b3 、C b4 . The bidirectional multilevel buck-boost converter of the present invention adopts a phase-shift plus bidirectional two-mode control method, and the converter can realize bidirectional flow of energy, and simultaneously realize boost and buck conversion in two directions. The bidirectional multilevel buck-boost converter of the present invention is especially suitable for occasions where high voltage, high power, and energy flow bidirectionally.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a bidirectional multilevel buck-boost converter suitable for high-voltage and high-power occasions and a control method thereof. Background technique [0002] With the development of power electronics technology, the requirements for power conversion devices are getting higher and higher, and the high efficiency and high power density of converters have always been one of the development trends of power electronics technology. In high-voltage and high-power applications, due to the high voltage stress of the switching devices, it is difficult to increase the switching frequency, resulting in large system size and low efficiency. How to ensure high efficiency and high power density of electric energy conversion devices in high voltage and high power applications is very important. [0003] At present, many applications, such as ship integrated power systems, energy stor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/156
Inventor 徐林耿攀杨文铁姚川徐正喜陈涛魏华杨勇余定峰左超孙瑜罗伟吴浩伟谢炜姜波邢贺鹏李小谦孙朝晖李可维吴大立潘德华汪晓峰蔡凯黄超周樑余跃听雷津袁阳
Owner NO 719 RES INST CHINA SHIPBUILDING IND
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