Turorial Berguru Listrik - Rumus Dasar Untuk Motor Induksi

Rumus Dasar untuk perhitungan motor induksi
Kecepatan Sinkron
Synchronous motor speed (NS ) =  120 x frekuensi / poles
.................................................=  120 x f / p
.................................................=  rpm

Persentase Motor Slip
Persen Motor Slip (%S) = ((NS - NR) / NS ) x 100

Kecepatan Rotor
Rotor Speed (NR) = NS x (1 - %Slip)

Torsi (Torque)
Output Motor Torque, ft.lbs. (T) = hp x 5252 / rpm

Power
Power Input (Pin ) = S3 x V I Cos Q
Power Input (Po ) = Pin - Machine Loss

Efisiensi
Efisiensi = Po/Pin
.............= (Pin - Machine Loss) / Pin

Power Factor
Percent Power Factor (Cos Q) = Pin / kVA
................................................= (kw / kVA) x 100

Arus suplay

Line Current, amps (IL) = (hp x 746) / (V x Eff x Cos Q x S3)

Kerapatan Gap
Air Gap Density = Flux / Area
..........................= Bg µ V / f

Torsi (T) µ  Bg² µ hp

Slip µ 1/Bg² µ 1/V²

Keterangan =  µ :  Sebanding