On the Concept of Four Nearest Space Vector PWM for Multi Source Inverters

A new structure for hybridization of the battery packs, and Ultra Capacitor (UC) banks as the complementary storage systems utilized in full Electric Vehicles (EVs) is the Multi Source Inverters (MSI). Since a MSI is ultimately a reconfigurable single stage DC/AC inverter, it requires a modulation stage for controlling its switching actions. This paper proposes a novel Space Vector Modulation (SVM) technique, which synthesizes the reference vector using four nearest vectors to the reference. It has been shown that the new method can improve the output voltage THD by around 9.63 percent and the DC link utilization by 6.47 percent in compare with the traditional SVM methods using three nearest vectors. The proposed method has been implemented on a case study MSI and Matlab/Simulink simulations along with the experimental results have been provided to verify the concept.