Abdul Lateef Dar

Calculation of maximum torque of driving motor

Torque satisfying formula of driving motor：

Where,

Fq = FT + Ff

Fq = Driving Force

FT = Traction Force
Ff = Rolling Resisitance
FT = Z.bₗ,hₖ.k


= maximum driving power
= Drive motor rated speed

3. Design of Power battery pack

Total energy of the power pack which is theoretically consumed:

Wess = Pe.T (KWh)

In the formula, Z is the number of plowshare; bl is single plough width, cm; hk is plough depth, cm; k is soil resistance, N/cm2.
Rated Driving Force of Electric Tractor is :


Ftn = (1.1 ̴ 1.2) FT


Ff = m g f
In the formula, m is whole vehicle use quality, g is acceleration, take the value 9.8m/s2; f is rolling resistance coefficient.

2. Power calculation of driving motor

The power of electric tractor in plough work should meet:

Where,
Vₗ is maximum speed of plough and ηq is the traction efficiency of drive system.

ηq= ηmc. ηm. ηδ. ηf
ηq =efficiency of drive motor and control system
ηmc =efficiency of transmission system ηδ =slip efficiency

ηf =rolling efficiency

Pe = Rated Power T = Working Time
The total capacity of the battery pack is determined according to the theoretical total energy consumed by the power pack ：