What is the formula for induction motor?
Slip Speed & Slip of Induction Motor: Slip speed is the difference between synchronous speed and rotor speed; Nslip = Ns – N (Speed in RPM) ωslip = ωs – ω (Angular speed in Rad/sec)
How do you calculate the power of a 3 phase induction motor?
How do I calculate a 3-phase motor horsepower? You can use this equation HP = amperage × motor voltage × power factor × efficiency × 1.73205 / 746 to calculate the power rating of a 3-phase motor in horsepower.
How do you calculate three phase motor?
The equation is W = AV(sqrt 3) where A is amperes, V is volts, and sqrt 3 is the square root of 33 (about 1.73). W is the power consumption in watts. For example, if the electric motor uses 50 amps at 240 volts, the wattage is 50 x 240 x 1.73, or 20,760 watts.
How do you calculate induction motor speed?
To calculate RPM for an AC induction motor, you multiply the frequency in Hertz (Hz) by 60 — for the number of seconds in a minute — by two for the negative and positive pulses in a cycle. You then divide by the number of poles the motor has: (Hz x 60 x 2) / number of poles = no-load RPM.
How do you calculate 3-phase load current?
A = 1000 × kW / (3 × PF × V) For a 3-phase power supply calculation, you need to multiply 1000 by the power (kW), divided by three times the power factor times line-to-neutral RMS voltage (V).
What is the formula for 3 phase?
3-Phase Power Formula 1 kW = 1,000W. As we can see, the electrical power in the 3-phase AC circuit depends on: I (Amps): Electrical current, measured in amps. The more amps we have, the more power we have in a three-phase circuit.
How do you calculate motor load capacity?
Por = Nameplate rated horsepower Load = Output power as a % of rated power Pi = Three-phase power in kW η = 0.7457 x hp x Load Pi Page 8 8 By definition, a motor of a given rated horsepower is expected to deliver that quantity of power in a mechanical form at the motor shaft.
How do you calculate motor current from RPM?
In our example input electrical power of the motor is 0.22 A x 6 V = 1.32 W, output mechanical power is 1000 rpm x 2 x 3.14 x 0.00126 N•m /60 = 0.132 W.
How do you calculate motor current from kW?
For any single-phase AC circuit, Current, I = 1000 x kW / (Vac x P.F.) Therefore, amps can be calculated from AC – kW by dividing kW by the product of the RMS value of applied AC voltage and power factor and multiplying it by 1000.
What is slip formula?
The difference between the synchronous speed and the rotor speed is known as slip speed. It is given by. Slip speed = Ns – Nr.
How do you calculate 3 phase kilowatts?
AC three phase amps to kilowatts calculation formula
- P(kW) = √3 × PF × I(A) × VL-L(V) / 1000.
- kilowatt = √3 × PF × amp × volt / 1000.
- kW = √3 × PF × A × V / 1000.
- P = √3 × 0.8 × 3A × 110V / 1000 = 0.457kW.