Motor power selection plays a critical role in AGV drive wheel power calculation, industrial motion control and planetary gearbox-based transmission systems. This guide covers three practical power calculation methods and explains why P = F × V is widely used. Torque conversion formulas and sizing criteria are included for engineering accuracy.
1. Three Practical Methods for Motor Power Calculation
| Method | Application | Formula | Strength | Limitation |
|---|---|---|---|---|
| Force–Velocity | Linear modules, AGV drive wheels | P = F × V → Pmotor = (F × V × K) / η | Simple | Requires torque conversion |
| Torque–Speed | Rotary tables, steering axle | P = T × ω or P = T × n / 9550 | Precise | Requires T & n |
| Empirical Estimation | Lifting systems | P = (G × H) / (270 × η) | Fast | Rough estimate |
Keywords embedded: servo motor sizing, AGV drive unit selection, industrial automation power calculation
2. Why P = F × V is the Universal Core Formula
From fundamentals:
T = F × r
ω = V / r
⇒ ✅P = T × ω = F × V
Works for both linear and rotational motion
3. Torque Calculation & Gearbox Conversion Table
| Item | Formula | Notes |
|---|---|---|
| Motor torque | Tmotor = 9550 × P(kW) / n(rpm) | Based on rated speed |
| Wheel torque | Twheel = Tmotor × i × ηg | Gearbox ratio i |
| Linear force | F = Twheel / r | Wheel radius r |
Keywords included: AGV wheel torque calculation, planetary gearbox torque conversion, servo torque chart
Servo Sizing Best Practices
| Criteria | Recommendation |
|---|---|
| Inertia ratio Jload/Jmotor | ≤ 5 for stability |
| Safety factor K | 1.2–2.0 |
| Continuous torque margin | ≥ 20% |
| High-speed direct drive | Priority on thermal performance |
4. Real Case Reference: Linear Module
Load 25 kg / Speed 0.4 m/s
→ Theoretical: 9.8 W
→ Corrected: 16.3 W
→ Final motor: approx. 40 W servo (torque-verified)
Illustrates why torque and efficiency must be considered in servo motor sizing.
✅Conclusion
| Takeaway | Benefit |
|---|---|
| P = F × V applies universally | AGV/AMR motion control, robotics |
| Efficiency & inertia must be considered | Prevent overload & overheating |
| Empirical methods only for early design | Not for final component ordering |
Accurate power & torque calculation ensures system reliability and optimal performance.
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High-Performance Servo Motor + Planetary Gearbox for Industrial Automation & Intelligent Logistics
Motor Power Calculation Guide: Why P=F×V Matters in Servo Motor Sizing & AGV Motion Design