Abstract

Fast Charging (FC) stations for Electric Vehicles (EV) are gaining popularity as it has become evident that all modes of transportation will be electrified in the not so distant future. The lack of range in the currently available electric vehicles have also fueled the need for these quick charging stations. The typical power levels of these FC stations are 50kW and above, these are generally an off-board structure. Three phase front end rectifiers are a preferred choice of power converter for these FC stations. Though many topologies have been proposed as a suitable candidate for this charging station, the task of selecting a single-stage high efficiency power converter for this purpose is challenging. The Three-Phase Three-Switch (TPTS) is a good candidate for the FC station due to its high efficiency and its wide output voltage variation. The Space Vector (SV) based modulation technique has been a very popular choice for the operation and control of the TPTS converter. This paper introduces a simplified carrier based modulation scheme which can be implemented without dealing with complicated transformations and solving trigonometric equations. A brief overview of the procedure followed to obtain the modulating wave, which is compared with the triangular carrier is explained.

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