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http://dx.doi.org/10.7471/ikeee.2019.23.1.68

New Fault Current Fast Shutdown Scheme for Buck Converter  

Park, Tae-Sik (Dept. of Electrical and Control Engineering, Mokpo National University)
Kim, Seong-Hwan (Dept. of Electrical and Control Engineering, Mokpo National University)
Publication Information
Journal of IKEEE / v.23, no.1, 2019 , pp. 68-73 More about this Journal
Abstract
This paper presents a novel fast shut-down scheme for Buck converter by using a coupled inductor. Generally, a controller for Buck converter stops generating PWM patterns in various fault cases: Overcurrent, Short circuit, or Overvoltage, but the inductor and capacitor keep supplying their stored energy to loads although the switching operations in Buck converter stopped. The stored energy in the inductor and capacitor could cause electrical stresses on breakers and safety problems. The main idea of the proposed fast shutdown scheme is to demagnetize the inductor core by using a coupled inductor, and its performance and operations are verified by using PSIM Simulation.
Keywords
DC-DC; Buck; converter; fault current; shut-down; coupled inductor;
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