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IPOP type converter and control method thereof

A control method and converter technology, which are applied in control/regulation systems, DC power input conversion to DC power output, instruments, etc., can solve the problems of anti-interference ability, poor robustness, slow response speed, etc., and increase control variables. , the effect of improving the response speed

Pending Publication Date: 2022-04-19
SUNGROW POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

like figure 1 As shown, this scheme regards the two-level system as a whole, single-loop control, slow response speed, poor anti-interference ability and robustness

Method used

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  • IPOP type converter and control method thereof
  • IPOP type converter and control method thereof
  • IPOP type converter and control method thereof

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Embodiment Construction

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0053] In this application, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes none. other elements specifically listed, or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "com...

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Abstract

The invention provides an IPOP type converter and a control method thereof, and the control method comprises the steps: carrying out the open-loop fixed-frequency control of an LLC circuit in each DC / DC conversion module; however, for Boost circuits in each DC / DC conversion module, output parameters of an IPOP type converter, output voltage of any Boost circuit and inductive current of each Boost circuit are used as feedback quantities to carry out three-ring fixed-frequency control; compared with single-loop control in the prior art, control variables are increased, and the response speed, the anti-interference capability and the robustness are improved. Moreover, the amplitude of the input current of each Boost circuit can be directly limited, and the amplitude of the Boost output voltage can be directly limited; in addition, Boost current sharing and LLC automatic current sharing of each path can be realized, and magnetic elements or sampling circuits do not need to be additionally arranged.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to an IPOP converter and a control method thereof. Background technique [0002] The LLC resonant converter can realize the zero-voltage turn-on (ZVS) of the primary side switch and the zero-current turn-off (ZCS) of the secondary side switch, so as to obtain high conversion efficiency and is suitable for high frequency and high power density design. However, when the input voltage fluctuates greatly, its switching frequency or duty cycle will change greatly, which is not conducive to the optimal design of magnetic components. Two-stage DC / DC can effectively solve this problem. Its pre-stage Boost circuit is used to realize voltage and current regulation, and its post-stage LLC circuit is used to realize electrical isolation and voltage matching. In the case of low voltage and high current, the input and output of multiple two-stage DC / DC are usually connected in parallel...

Claims

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Application Information

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IPC IPC(8): H02M3/335H02M3/155
CPCH02M3/33592H02M3/155Y02B70/10
Inventor 潘岱栋
Owner SUNGROW POWER SUPPLY CO LTD
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