A Novel Approach of Improving Battery Performance and Longevity of the Developed Electrically Assisted Triwheeler Vehicle by Implementing Torque Sensor Technology
Table 2
Overview of electric and mechanical components of the electric wheelchair with specifications.
Component category
Type of component
Specifications
Sealed lead-acid batteries
Electric
3 batteries (each 12 V, 12 Ah) connected in series
Hub motor with motor controller
Electric
36 V, 250 W, 300 rpm; maximum current flow is 17 A and low-voltage protection is 31.5 V for the motor controller
Torque sensor module
Electric
Output torque > 15 Nm, output, linear, zero start, 0.5~4.5 V, = 5.15 V (+/0.15 V)
Torque adjuster circuit
Electric
Consists of a voltage regulator (LM7805), op-amp (LM358), potentiometer (10 k), resistors (5 kiloohms, 10 kiloohms), capacitors (0.1 F), power supply connectors
Charge controller with Low-Voltage Disconnect (LVD)
Electric
36 V, 25 A, LVD at 36.2 V
Throttle
Electric
Biasing voltage is 5 V; operating range 0.8–4.5 V (acting as a potentiometer)
Horn and front light
Electric
Works at 12 V from the battery supply
Body frame and the front handlebar
Mechanical
Customized steel tubed frame
Torque sensor pedal
Mechanical
Aluminum frame for crank shaft; the number of gear teeth is 48
Wheel type and dimension of the wheel (including tire size)
Mechanical
Larger and narrow, with the dimension of the front wheel and each rear wheel being 26 inches and 26 inches, respectively
Wheels with dimension (excluding the tire size)
Mechanical
Front wheel size is 24 inches and rear wheel size is 24 inches
Front brake
Mechanical
Traditional V-brake
Chain and a small sprocket
Mechanical
Chain and sprocket are cast iron material; the sprocket has 24 teeth
