Enhancing speed–torque response and efficiency of Modern Utility Hybrid Renewable Energy Vehicles (MUHREVs) through inverted decoupler control strategy

Hybrid electric vehicles (HEVs) will be pivotal in smart cities, complementing shared mobility and public transport. Overcoming traditional HEV limitations, Modern Utility Hybrid Renewable Energy Vehicles (MUHREVs) have emerged. By harnessing pure renewable sources like solar and fuel cells, MUHREVs offer a minimal emission. This paper presents an inverted decoupler control strategy to enhance the speed–torque response and efficiency of a MUHREV. Simulation was carried out using both the existing direct torque controller (DTC) and the proposed methodology. At a speed of 3000 rpm, employing DTC exhibited a torque output of 175Nm with a torque ripple of 5%, a settling time of 490 ms, and a peak overshoot of 12%. This demanded an inverter input of 620 V. The suggested methodology, operating under the same speed parameters, necessitated only an input voltage of 280 V-320 V to achieve the identical 175Nm torque. Notably, this yielded a reduced torque ripple of 2%, a faster settling time of 220 ms, and a peak overshoot of 8%. Simulation results underscored that the proposed inverted decoupler-controlled MUHREVs showcased decreased torque ripple, enhanced dynamic response, and lower voltage requisites for motor operation compared to the existing DTC approach. Validation was performed through a hardware setup, supporting the simulation outcomes.