Open AccessOne current adaptive switching strategy for DC/DC converter with spike limitation
Author(s) -
Wu Qunfang,
Wang Qin,
Xu Zilong,
He Peng,
Li Jinbo
Publication year - 2018
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2017.0148
Subject(s) - power (physics) , voltage , inductance , current (fluid) , control theory (sociology) , computer science , boost converter , voltage spike , spike (software development) , electrical engineering , capacitor , engineering , physics , control (management) , software engineering , quantum mechanics , artificial intelligence
In this study, a new current adaptive switching strategy with the spike limitation applied in DC/DC converter is proposed. With this switching strategy, the switching speed of the power switch can be regulated adaptively with the change of the load. The turn‐on/turn‐off current is inversely proportional to the load. So, at the light load, the switching speed of the power switch is faster and the switching losses are lower. In addition, all of the control should be based on one principle that the current/voltage spike across power switch under a smaller load cannot exceed that under a rated load. The switching characteristics of power switch with the proposed switching strategy and the relationship between current/voltage spike, turn‐on/turn‐off current and power loop stray inductance during the switching transition is discussed in this study. Moreover, the drive circuit is designed in detail. Finally, a boost converter prototype with 200 V DC input voltage/380 V output voltage/1 kW output power is established to verify the proposed method. The tested results show that the efficiency of the converter adopted the proposed method rises by 1.5% comparing with that used a conventional switching strategy at the light load.