Calculus amperum motoris electrici ex potencia, tensione, factor potenti et efficacia, utilis in designo electrico et selectione instrumentorum.
Supportat:
Directum Currentem (DC)
Uniphasium AC
Triplicem Phasium AC
Uniphasium: I = P / (V × PF × η)
Triplicem Phasium: I = P / (√3 × V × PF × η)
DC: I = P / (V × η)
Ubi:
I: Amperes (A)
P: Potentia Activa (kW)
V: Tensio (V)
PF: Factor Potenti (0.6–1.0)
η: Efficacia (0.7–0.96)
Motor triplicis phasium: 400V, 10kW, PF=0.85, η=0.9 →
I = 10,000 / (1.732 × 400 × 0.85 × 0.9) ≈ 18.9 A