DC ultra-fast solid state circuit breaker using the voltage inductor to activate short circuit protection

This paper introduces a new DC solid-state circuit breaker (SSCB) concept using a small inductor, which is similar to the inductor used in electro-mechanical breakers. The new SSCB scheme uses the voltage inductor to activate a short circuit protection, in this way the circuit starts to open in the moment of fault condition to prevent the over load current.

I. Introduction

Some SSCB technologies for DC reported in the literature can be classified in three main types: mechanicals [1], of solid state [4]–[13] and hybrids [2]. Each of them have advantages and disadvantages respect to the others, however, there are some common characteristics that are very important in this devices such as: time of response, electric arc suppression, high efficiency, low cost, among others. With the development of new semiconductors devices [3] with better features, is possible to improve the SSCB technologies in many aspects.