Table 3 Key parameters used in the E-axle and vehicle models, including motor and reducer efficiency.
From: Slip and tractive efficiency of an electric tractor with a 4WID E-axle system
Item | Value | ||
|---|---|---|---|
E-axle model | Induction motor model | Number of poles | 4 |
Stator resistance (m\(\Omega\)) | 11.24 | ||
Rotor resistance (m\(\Omega\)) | 4.86 | ||
Mutual inductance (mH) | 1.2 | ||
Stator leakage inductance (mH) | 0.009 | ||
Rotor leakage inductance (mH) | 0.009 | ||
Leakage coefficient | 0.0126 | ||
Rated d-axis current (A) | 50.7 | ||
Max. torque (Nm) | 143.9 | ||
Max. stator voltage (V) | 41.6 | ||
Max. stator current (A) | 650 | ||
Base mechanical speed (rpm) | 3000 | ||
Rotor moment of inertia (kg\(\cdot\)m\(\phantom{0}^{2}\)) | 0.01 | ||
Viscous damping coefficient (N\(\cdot\)m\(\cdot\)s/rad) | 0.03 | ||
Efficiency | Motor-inverter system efficiency | 0.70 | |
Reducers efficiency | 0.94 | ||
Speed controller | Proportional gain | 0.16 | |
Integral gain | 0.79 | ||
Anti-windup gain | 6.37 | ||
Current controller | Proportional gain | 0 | |
Integral gain | 0.49 | ||
Anti-windup gain | 17.45 | ||
Flux estimator | Proportional gain | 0.73 | |
Integral gain | 0.46 | ||
Vehicle model | Tire model | Soft soil, Magic formula coefficients (B, C, D, E) | 4.3, 1.6, 0.62, 1 |
Hard soil, Magic formula coefficients (B, C, D, E) | 5.5, 1.4, 0.94, 1 | ||
Vehicle body | Low-load | 0.3–0.5 | |
High-load | 0.5–0.7 | ||
