Average Inductor Current Measure and Control Strategy for Multimode Primary-Side Flyback Converters
Average Inductor Current Measure and Control Strategy for Multimode Primary-Side Flyback Converters
复制标题
多模式初级侧反激转换器的平均电感电流测量和控制策略
DOI：
10.1109/tpel.2020.2991216
复制
发表时间：
2020-12
影响因子：
6.7
通讯作者：
Zhu Zhangming
中科院分区：
文献类型：
--
作者：
Han Yueyun;Wu Qiang;Li Yongyuan;Zhu Zhangming
一次侧反激变换器（PSR）以其简单、经济的优点在中小功率应用中得到了广泛的应用。但是由于PSR特殊的结构特性，二次侧电流的测量存在一定的困难。传统上采用峰值电流测量策略来测量初级电感的电流。然而，该采样方法仅适用于一种导通模式，并且受大多数场效应管控制信号与实际关断时刻之间的传播延迟的影响。因此，需要补偿电路来提高精度，这导致控制器的面积和成本很大。本文介绍了一种多模平均电感电流测控策略。平均电感电流测量策略是基于米勒级来识别most fet的状态，从而消除了most fet带来的误差。得到一次电感的平均电流，不需要估计电感电流的上升斜率和峰值。为了验证所提方法的可行性，结合所提方法制作了一个充电应用控制器。硬件实验结果表明，该控制系统能在多模式下正常工作。在85 ~ 265 Vac的输入电压范围内，系统的恒输出电流精度为±1%，稳压率为1.6%。
Primary-side flyback converter (PSR) is widely used among small and medium power applications for its simplicity and cost effectiveness. However, it is hard to measure the current of secondary side due to the special structure characteristic of PSR. Conventionally, a peak current measurement strategy is adopted to measure the current of primary inductor. However, the sampling method is just for one conduction mode and is affected by the propagation delay between the control signal and actual turn-off instant of mosfet. Thus, a compensation circuit is needed to improve the accuracy, which leads to a large area and cost of the controller. In this work, a kind of average inductor current measure and control strategy for multimode is introduced. The average inductor current measurement strategy is based on the Miller stage to recognize the state of the mosfet, which eliminates the error caused by the mosfet. The average current of primary inductor is obtained and there is no need to estimate the rising slope and the peak value of the inductor current. To verify the feasibility of the proposed method, a controller for charging application is fabricated integrated with the proposed method. Hardware experimental results show that the control system can properly operate in multimode. The accuracy of constant output current is ±1% and the line regulation of the system is 1.6% under the input line voltage ranges from 85 to 265 Vac.
登录
查看更多内容
DOI：
10.1109/asicon.2009.5351369
发表时间：
2009-12
期刊：
2009 IEEE 8th International Conference on ASIC
影响因子：
--
作者：
Zhao Ye;Z. Yumei;Duan Liye
通讯作者：
Zhao Ye;Z. Yumei;Duan Liye
DOI：
10.1049/ic.2012.0195
发表时间：
2012-06
期刊：
--
影响因子：
--
作者：
T. Vu;S. O’Driscoll;J. Ringwood
通讯作者：
T. Vu;S. O’Driscoll;J. Ringwood
影响因子：
6.7
作者：
Cheng-Nan Wu;Yang-Lin Chen;Yaow-Ming Chen
通讯作者：
Cheng-Nan Wu;Yang-Lin Chen;Yaow-Ming Chen
DOI：
10.1109/apec.1997.575641
发表时间：
1997-02
期刊：
Proceedings of APEC 97 - Applied Power Electronics Conference
影响因子：
--
作者：
Michael T. Zhang;M. Jovanovic;F. Lee
通讯作者：
Michael T. Zhang;M. Jovanovic;F. Lee
影响因子：
6.7
作者：
K. Wong
通讯作者：
K. Wong