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## What is the maximum speed of induction motor in India?

Motor Speed

Indian motors have synchronous speeds like **3000 / 1500 / 1000 / 750 / 600 / 500 / 375 RPM** corresponding to no.

## What is maximum speed of motor?

Max speed is defined by the bus voltage and the voltage constant (Ke). The max speed is simply when current flowing is zero, and **speed = Vbus/ Ke**. The units for Ke for linear motors is v/m/sec and for rotary and arc v/rad/sec.

## What is the maximum speed a rotor of an induction motor rotates at?

Rotor speeds typically lie in the **120–210 m/s range**, but mostly between 150 and 190 m/s, with a tendency to be higher with a smaller rotor diameter [6]. Currently the smallest rotor diameter used industrially is 28 mm with rotor speed up to 150,000 rpm, though some machines can reach 160,000 rpm.

## What is the maximum RPM of synchronous speed?

The 3-phase 4-pole (per phase) synchronous motor will rotate at 1800 rpm with 60 Hz power or **1500 rpm with 50 Hz power**.

## 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 is the speed of an induction motor determined?

In most cases, you can look inside the motor and count **the number of poles in** the winding; they are distinct bundles of wire evenly spaced around the stator core. The number of poles, combined with the ac line frequency (Hertz, Hz), are all that determine the no-load revolutions per minute (rpm) of the motor.

## At what speed will the maximum torque of an induction motor occur?

So, when **slip s = R _{2} / X_{2}**, the torque will be maximum and this slip is called maximum slip Sm and it is defined as the ratio of rotor resistance to that of rotor reactance. NOTE: At starting S = 1, so the maximum starting torque occur when rotor resistance is equal to rotor reactance.