Novel Sensorless Current Multimode Control for PSR Double-Clamp ZVS (DCZVS) Flyback Converter in DCM and CrCM

IF 5.2 1区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Transactions on Circuits and Systems I: Regular Papers Pub Date : 2024-07-23 DOI:10.1109/TCSI.2024.3413784

Song Ding;Zheng Zhang;Li Chen;Qinsong Qian;Weifeng Sun

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Abstract

There are two drawbacks in the previous tri-mode variable-frequency peak current mode (VFPCM) control for primary side regulation (PSR) double-clamp zero voltage switching (DCZVS) flyback converter: firstly, the current-sense resistor leads to non-negligible loss at high power and instability at high frequency; secondly, the previous tri-mode control suffers from poor dynamic performance and lacks accurate small-signal model in various control modes. In this paper, a novel sensorless current quad-mode control is proposed, which eliminates the current-sense resistor by input voltage feed-forward and improve the dynamic performance by introducing hybrid mode (HYM) and seamless mode-switch. In addition, a unified small-signal model of the four control modes is derived in the paper, which explains the high dynamic performance of the introduced HYM. The proposed sensorless current quad-mode control and the unified small-signal model are validated on a 16-50V input and 28V/320W output experimental prototype. Compared with the traditional tri-mode peak current mode control, the undershoot recovery time and overshoot recovery time of the proposed control scheme are reduced from 12ms to 2.0ms and 12ms to 1.6ms, respectively.

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用于 DCM 和 CrCM 中 PSR 双钳位 ZVS (DCZVS) 反激式转换器的新型无传感器电流多模控制装置

以往用于一次侧调节（PSR）双钳位零电压开关（DCZVS）反激变换器的三模式变频峰值电流模式（VFPCM）控制存在两个缺点：首先，电流检测电阻导致大功率下不可忽略的损耗和高频率下的不稳定性；其次，以往的三模式控制动态性能差，缺乏各种控制模式下精确的小信号模型。本文提出了一种新型无传感器电流四模式控制，通过输入电压前馈消除了电流检测电阻，并通过引入混合模式（HYM）和无缝模式切换提高了动态性能。此外，文中还推导出了四种控制模式的统一小信号模型，从而解释了所引入的 HYM 的高动态性能。在 16-50V 输入和 28V/320W 输出的实验原型上验证了所提出的无传感器电流四模式控制和统一小信号模型。与传统的三模式峰值电流模式控制相比，拟议控制方案的下冲恢复时间和过冲恢复时间分别从 12ms 和 12ms 缩短到 2.0ms 和 1.6ms。

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来源期刊

IEEE Transactions on Circuits and Systems I: Regular Papers 工程技术-工程：电子与电气

CiteScore

9.80

自引率

11.80%

发文量

441

审稿时长

2 months

期刊介绍： TCAS I publishes regular papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes: - Circuits: Analog, Digital and Mixed Signal Circuits and Systems - Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic - Circuits and Systems, Power Electronics and Systems - Software for Analog-and-Logic Circuits and Systems - Control aspects of Circuits and Systems.