Suitability of T source inverter based vector controlled drive for parallel mild hybrids

Voltage source inverter based drives are known to be smaller, reliable, and efficient and have relatively fewer issues than current source inverter based drives. However, in recent times impedance source inverters appear to be a promising candidate for these applications, as they carry the advantages of both voltage source inverters and current source inverters. This paper presents the performance of a T source inverter based vector controlled drive in a parallel mild hybrid vehicle. A T Source Inverter is a type of impedance source inverter with fewer passive elements. The performance of the drive is validated through a typical driving pattern which is most likely to be experienced by parallel hybrids utilizing electric power-assist strategy. The performance of this drive is also compared with a voltage source inverter based vector controlled drive for 22 seconds of a typical Indian urban driving cycle. The results of these analyses along with the performance of the proposed drive on initial parts of typical urban driving cycles in the US and Europe, helps in confirming the suitability of T source inverter based drives in these vehicles.