# What is the formula of induction motor?

## What is the formula of 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 motor current?

The motor FLA calculator uses the following formulas:

1. Single Phase AC Motor FLA (Amperes) = (P [kW] × 1000) / (V × cos ϕ)
2. Single Phase AC Motor FLA (Amperes) = (P [HP] × 746) / (V × cos ϕ × η)
3. Three Phase AC Motor FLA (Amperes) = (P [kW] × 1000) / (V × 1.732 × cos ϕ)

### How is induction motor current measured?

Induction motor parameters are measured separately. Speed is measure by tachometer, current is measure by ammeter and voltage is measure by voltmeter. Input power of induction motor is measured by wattmeter.

What is current induction motor?

An induction motor or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. An induction motor can therefore be made without electrical connections to the rotor.

#### What are the types of induction motor?

Induction motors are classified into two types namely single phase induction motor and three-phase induction motor. As their name suggests, a 1-phase induction motor is connected to a single-phase AC power supply whereas the 3-phase induction motor can be connected to a three-phase AC power supply.

What is induction motor efficiency?

Ideally, there’s some slippage of the rotor relative to the frequency; typically, this is about 5%. As such, these motors are considered asynchronous motors. Efficiency of three-phase induction motors can vary from 85% to 96%.

## What is the formula for current?

Current is usually denoted by the symbol I. Ohm’s law relates the current flowing through a conductor to the voltage V and resistance R; that is, V = IR. An alternative statement of Ohm’s law is I = V/R.

How do you calculate power factor?

The power factor of an AC circuit is defined as the ratio of the real power (W) consumed by a circuit to the apparent power (VA) consumed by the same circuit. This therefore gives us: Power Factor = Real Power/Apparent Power, or p.f. = W/VA.

### What is power factor meter?

Definition: The power factor meter measures the power factor of a transmission system. The power factor is the cosine of the angle between the voltage and current. The power factor meter determines the types of load using on the line, and it also calculates the losses occur on it.

What is induction motor working principle?

Working Principle of Induction Motor The motor which works on the principle of electromagnetic induction is known as the induction motor. The electromagnetic induction is the phenomenon in which the electromotive force induces across the electrical conductor when it is placed in a rotating magnetic field.

#### How is a 3 phase induction motor calculator used?

3 Phase Induction Motor current calculator is used to calculate the rated and full load amperes of the motor. Enter the rated volts, amps, power, and efficiency to find the current flowing through the motor. The 3 phase Induction motor is popular for its efficiency and is widely employed in the electric systems for doing mechanical work.

What is the current of an induction motor?

Take a 150hp, 1789rpm, 460V, Design B, Code G, 3-phase induction motor. So rated current is 163A, with a power factor of 0.897 lagging and an efficiency of 96.2%. Code G gives you locked rotor kVA on a per hp basis.

## How to calculate the KVA of an induction motor?

Calculation: Find the starting current of 10 hp, three phase 220 V A class motor. Solution: The maximum kVA/hp for A class motor is 3.15 (code factor). I L = 31.5 kVA / (√3 * 220) = 82.66 A

How to calculate rotor reactance in induction motor?

This circuit will be used in the motor analysis in the sections following. I2 = Rotor Current R2 = Rotor Resistance X2 = Rotor Reactance Z2 = Rotor Impedance (R2 / S + jX2) Xx = Zx = Air Gap Impedance What the stator sees in the air gap is the equivalent of putting an impedance (equal to R2/s + jX2) across E2.