Deadbeat Control of Three-Phase Sinusoidal Output Y-Inverter for Automotive Powertrains

The buck-boost Y-Inverter is a promising converter topology that has been proposed recently for low power (10 kW) fuel cell compressors. The advantages of the Y-inverter can be leveraged also for automotive powertrains fed by fuel cells. The power levels of such powertrains typically exceed 100 kW, while high dynamic performance is required for the eMotor torque control. The voltage control solution available in the literature for the Y-inverter is based on a conventional cascaded voltage and current control employing proportional-integral controllers. However, this solution has limited bandwidth performance when the switching frequency is limited below 100 kHz, as typical for automotive inverters. Therefore, this article proposes an advanced control solution for traction Y-inverters fed by fuel cells, able to fulfil the requirements of high performance torque control of the eMotor.