Table 8 Main parameters of the tractor.
Parameter | Symbol | DMCP | DMCP with power assist system | |
|---|---|---|---|---|
Speed-coupling type | Speed-coupling type | Mixed-coupling type | ||
Transmission gear ratio | \(\:{i}_{1}\) | 4.03 | ||
\(\:{i}_{2}\) | 1.963 | |||
Final reduction gear ratio | \(\:{i}_{0}\) | 37.4414 | ||
PGS gear ratio | \(\:k\) | 3.256 | ||
Main motor input gear ratio | \(\:{i}_{main}\) | 1 | ||
Auxiliary motor input gear ratio | \(\:{i}_{aux}\) | 1 | - | - |
\(\:{i}_{au{x}_{1}}\) | - | 1 | - | |
\(\:{i}_{au{x}_{2}}\) | - | 1.4187 | - | |
PTO gear ratio | \(\:{i}_{pto}\) | 4.44 | ||
Assist gear ratio | \(\:{i}_{assist}\) | - | 0.2252 | 1 |
Rear wheel radius, m | \(\:{r}_{r}\) | 0.594 | ||
Moment of inertia of main motor, kg·m2 | \(\:{I}_{main}\) | 0.04 | ||
Moment of inertia of auxiliary motor, kg·m2 | \(\:{I}_{aux}\) | 0.0066 | ||
Moment of inertia of assist motor, kg·m2 | \(\:{I}_{assist}\) | 0.0066 | ||
The rolling resistance coefficient of tractor | \(\:f\) | 0.05 | ||
The total gravity of the tractor, N | \(\:G\) | 40,967 | ||
The air density, kg/m3 | \(\:\rho\:\) | 1.225 | ||
The air resistance coefficient | \(\:{C}_{d}\) | 1 | ||
The windward area, m2 | \(\:A\) | 4.71 | ||
Battery capacity Ah | \(\:Q\) | 115.2 | ||
