Digital Average Voltage Control for Switching DC-DC Converters

被引：0
|
作者：
Liu, Xiaotian [1 ]
Zhou, Guohua [1 ]
Leng, Mingrui [1 ]
Zhou, Shuhan [1 ]
机构：
[1] Southwest Jiaotong Univ, Sch Elect Engn, Chengdu, Peoples R China
来源：
2016 IEEE 8TH INTERNATIONAL POWER ELECTRONICS AND MOTION CONTROL CONFERENCE (IPEMC-ECCE ASIA) | 2016年
关键词：
digital average voltage (DAV) control; digital control; z-domain modeling; switching converter;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Inspiring by the advantages of digital peak voltage (DPV) control and digital average current (DAC) control, the digital average voltage (DAV) control for switching DC-DC converter is proposed and investigated. Taking buck converter as an example, DAV control algorithm is analyzed in detail. In order to explore the stability of system, the z-domain transfer function is deduced, by which the critical equivalent series resistance (ESR) of output capacitor is obtained. Finally, DAV controlled, DPV controlled and DAC controlled buck converter are compared by time-domain simulation. Results indicate that DAV control possesses better steady accuracy as well as DAC control. In addition, DAV controlled buck converter is in stable state during the whole duty ratio. Moreover, DAV control and DPV control have similar load transient performance but DAV control behaves lower overshoot voltage with load variation.
引用
收藏
页数：5
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