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Diode clamp mixed three-level double-active full-bridge current transformer and control method thereof

A diode-clamped, three-level technology, applied in the direction of converting DC power input to DC power output, AC power input converting to DC power output, electrical components, etc. question

Active Publication Date: 2019-05-10
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there is no description or report of the similar technology of the present invention, and no similar data at home and abroad have been collected yet.

Method used

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  • Diode clamp mixed three-level double-active full-bridge current transformer and control method thereof
  • Diode clamp mixed three-level double-active full-bridge current transformer and control method thereof
  • Diode clamp mixed three-level double-active full-bridge current transformer and control method thereof

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Embodiment

[0078] This embodiment provides a diode-clamped hybrid three-level dual active full-bridge converter.

[0079] Such as figure 1 As shown, the topology of the diode-clamped hybrid three-level dual active full-bridge converter provided in this embodiment is: including the input filter capacitor C inp and C inn , output filter capacitor C o , DC voltage source, primary side diode clamp hybrid three-level full bridge H 1 (referred to as the primary side full bridge), the secondary side single-phase full bridge H 2 (referred to as the secondary side full bridge), high frequency isolation transformer, high frequency inductor L s and controller, the primary-side diode-clamped hybrid three-level full-bridge H 1 Mainly consists of 6 fully controlled switching devices for S 1 ~S 6 and two diodes D 1 、D 2 Composition, where S 1 ~S 4 and diode D 1 、D 2 form a diode-clamped three-level bridge arm, S 5 , S 6 Form a two-level bridge arm; the secondary side single-phase full br...

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Abstract

The invention provides a diode clamp mixed three-level double-active full-bridge current transformer. Based on the double-active full-bridge current transformer, a two-level bridge arm at a primary side is replaced with a diode clamp three-level bridge arm, thereby adding an additional control variable, and enabling the topology to be suitable for a wide-voltage range application occasion. The invention further provides a control method at the same time, the four degrees of freedom global optimal control is realized based on the primary side zero level duty cycle, the primary side high-level duty cycle, the secondary side zero level duty cycle and four phase-shifting controlling quantities between the primary side and the secondary side of the diode clamp mixed three-level double-active full-bridge current transformers; by coordinating the four control variables of the current transformer, the current effective value is reduced, and the current transformer running efficiency is improved. The closed-loop control of the DAB global optimization running is given out, so that the current transformer can automatically realize global optimization running under different running working conditions.

Description

technical field [0001] The invention relates to the technical field of DC / DC high-frequency isolation conversion, in particular to a diode-clamp hybrid three-level dual-active full-bridge converter suitable for a wide voltage range and a control method for reducing its loss. Background technique [0002] Dual Active Bridge-Isolated Bidirectional DC / DC Converter (DAB) based on phase-shift control technology has the advantages of high power density, fast dynamic response, easy realization of soft switching, and bidirectional flow of power. Popular for intermittent power supplies, electric vehicles, solid-state transformers, and more. The common control method of DAB converter is phase-shift control. Two-level or multi-level voltage square waves with relative phase shift are generated at the primary port and secondary port of the high-frequency transformer. At the same time, by adjusting the primary and secondary square wave The relative phase shift and the duty cycle of each ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/487
CPCH02M3/33584H02M7/487H02M3/3376H02M3/33515H02M1/0003H02M1/0095Y02B70/10H02M1/0048
Inventor 李国杰童安平杭丽君
Owner SHANGHAI JIAOTONG UNIV
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