전기구동 AWD 트랙터의 견인 성능 평가

This study aims to evaluate the traction performance of an electric AWD (All-Wheel-Drive) tractor based on the power transmission and charging systems. The platform includes the electric motor, helical gear reducer, planetary gear reducer, and wheels. The electric system consists of a battery pack and charging system. An engine-generator and charger are installed to supply electric energy during agricultural operations. The load measurement system consists of analog (current) and digital (battery voltage and rotational speed of the electric motor) components using a controller area network bus. The output torque of the motor is calculated using the current and torque curves provided by the company. The agricultural work performance is verified by comparing the torque and rpm (T-N) curve of the motor with the reduction ratio applied. The traction is calculated using torque and specifications of the wheel, and traction performance is evaluated using tractive efficiency (TE) and dynamic ratio (DR). The electric motor protects itself from damage by limiting output when slip occurs. Results indicate that the proposed electric AWD tractor demonstrates improved traction performance under a high-load condition, based on the output torque of the electric motor, TE, and DR.