ELECTRIC VEHICLE WITH MANUAL GEAR SYSTEM

Electrical and Electronics Engineering

The performance of electric vehicles (EVs) can be significantly enhanced by using multi-speed transmissions instead of single-speed transmissions. Multi-speed transmissions offer advantages such as higher top speeds, faster acceleration, better ability to climb steep gradients, and increased driving range. This study extensively examines relevant literature to investigate the performance characteristics and complexities associated with multi-speed automatic manual/mechanical transmission (AMT) systems in EVs. In an EV powertrain, the electric motor is the sole torque generator component. However, the motor’s efficiency varies across a wide range of speeds, while vehicles need to operate at different speeds under various driving conditions. The study reveals that a multi-speed transmission system allows for efficient operation of the electric motor by selecting the appropriate gear based on the required torque and speed, thereby achieving desired vehicle performance with minimal energy consumption. To illustrate the differences, the study compares the dynamic and economic performance of EVs equipped with multi-gear systems versus single-speed systems. The findings are presented through tables and bar charts.

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