Electrical engineering
Alternating current
Reactance, impedance and power in AC circuits.
Electrical engineering
Inductive reactance
Xₗ = 2πfL→Electrical engineeringCapacitive reactance
X꜀ = 1 / (2πfC)→Electrical engineeringRLC circuit impedance
Z = √(R² + (Xₗ − X꜀)²)→Electrical engineeringAC apparent power
S = UI→Electrical engineeringAC active power
P = UI cos φ→Electrical engineeringAC reactive power
Q = UI sin φ→Electrical engineeringPower factor
cos φ = P / S→Electrical engineeringLC resonant frequency
f₀ = 1 / (2π√LC)→Electrical engineeringRMS voltage
U = Uₘ/√2→Electrical engineeringRMS current
I = Iₘ/√2→Electrical engineeringCapacitive reactance from angular frequency
X꜀ = 1/(ωC)→Electrical engineeringInductive reactance from angular frequency
Xₗ = ωL→Electrical engineeringCurrent from impedance
I = U/Z→Electrical engineeringLC circuit oscillation period
T = 2π√(LC)→Electrical engineeringPower factor from R and Z
cos φ = R/Z→Electrical engineeringAC phase angle in radians
φ = atan((Xₗ−X꜀)/R)→Electrical engineeringReactive power from phase angle
Q = UI sin φ→Electrical engineeringRLC voltage using Kirchhoff's law
U = √(Uᵣ²+(Uₗ−U꜀)²)→