การศึกษาเปรียบเทียบสมรรถนะระบบส่งกำลังในยานยนต์ไฟฟ้าดัดแปลง

Abstract

The objective of this research was to study the design of a powertrain system for electric vehicles using two different configurations of electric motors: the first configuration directly connects the electric motor to the rear differential without a gearbox, while the second configuration uses a gearbox between the electric motor and the rear differential. Subsequently, the study aimed to compare the driving performance of vehicles with both powertrain systems in terms of speed, acceleration rate, energy efficiency, payload weight, and hill climbing capability. Tests were conducted both on and off-campus under loaded conditions. After designing and calculations, it was found that the vehicle could effectively utilize an electric motor rated at 10 kW with an electrical voltage of 72 V. It employed a 72 V lithium iron phosphate (LiFePO4) battery with a capacity of 100 Ah. During operational tests with the gearbox-equipped powertrain system under full load (1,800 kg), the cycle driving type 1 (within the institute) better driving performance compared to the direct-drive system. Specifically, it achieved a driving range of 20.4 km, a speed of 37 km/hr, and consumed 5.4 kWh of energy.