Online Calculator
To help the visitors of this website with interpretations or calculations, we have
compiled a set of formulas (electrical and drive technology-focused) to create an online calculator.
Please note that all data and results are non-binding.
Power Calculations for DC Motors
Electrical power: P = V x I
Electrical power: P = I² x R
Electrical power: P = V² / R
Mechanical power: P = W / t
Power Calculations for AC Motors
Apparent power: S = V x I
Real power: P = V x I x cos φ
Reactive power: Q = V x I x sin φ
Power factor: cos φ = P / S
Reactive power factor: sin φ = Q /S
Power Calculations for Three-Phase Motors
Apparent power: S = V x I x √3
Active power: P = V x I x cos φ x √3
Reactive power: Q = V x I x sin φ x √3
Power factor: cos φ = P / S
Reactive power factor: sin φ = Q /S
Calculating a Cable Cross-Section:
DC motor - connecting cables
Cable cross-section: A = (2 x I x L) / (K x Δv x V)
AC motor - Connecting cables (1-phase)
Cable cross-section: A = (2 x I x L x cosφ) / (K x Δv x V)
Three-phase motor - Connecting cables (3-phase)
Cable cross-section: A = (√3 x I x L x cosφ) / (K x Δv x U)
Torque Calculation of Electric Motors
Torque: MD = 9550 x P x n
Slip Calculation of Electric Motors
Slip: S = (Ns - N ) / Ns x 100%)
Energy Savings Calculator Electric Motors
Calculator only, no formula