Motor Power Calculator
Calculate KW for Hoist, Cross Travel (CT), and Long Travel (LT) motions using inertia and friction physics.
Required Motor Power
0.00
kW
≈ 0.00 HP
Total Force (F):
0 N
Inertia Force:
0 N
Rec. Standard Motor:
--
Calculated based on Hoisting gravity + efficiency losses.
Calculation Methodology
Hoist Formula
The hoist motor must overcome gravity for the load plus the hook block assembly.
P = (F × v) / (1000 × η)
- F (Force): (SWL + Hook Weight) × 9.81 m/s²
- v (Velocity): Speed in m/s
- η (Efficiency): Gearbox efficiency (typ. 0.85)
Travel Formula (CT & LT)
Travel motors must overcome rolling friction AND inertia (acceleration force). Inertia is often larger than friction.
P = (F_total × v) / (1000 × η)
1. Friction Force (F_fric)
μ × Total Mass × 9.81
Overcomes wheel bearing & flange friction.
2. Inertia Force (F_acc)
Total Mass × (v / t)
Force required to accelerate mass from 0 to speed v in time t.