# What is the formula for speed of synchronous motor?

## What is the formula for speed of synchronous motor?

The synchronous speed of an AC motor is determined by the frequency of the source and the number of poles. The RPM is calculated by multiplying the frequency times 60 and dividing by the number of pairs of poles. This was explained in Chapter 6. Some motors are designed to operate at synchronous speed.

What is synchronous speed and its formula?

This rotating magnetic field moves with a speed called synchronous speed. The Synchronous speed can be calculated as follows: 120 times the frequency (F), divided by the number of poles (P): The synchronous speed decreases as the number of poles increases.

What is the synchronous speed of a 10 pole motor?

600 rpm
A: A 10-pole motor would have 5-pairs of N-S poles. It would rotate at 50/5 = 10 rotations per second or 600 rpm (10 s-1 x 60 s/minute).

### What is the synchronous speed of an 8 pole motor?

Approximate Electrical Motor Speed (rpm)
4 1725 1800
6 1140 1200
8 850 900

What is synchronous speed?

The synchronous speed is the speed of the revolution of the magnetic field in the stator winding of the motor. It is the speed at which the electromotive force is produced by the alternating machine.

What is synchronous speed when F 60hz P 6?

The synchronous speed of 60 Hz, 4 Pole Induction Motor is: 900 RPM. 1800 RPM.

## What is the speed of synchronous motor *?

The synchronous speed is the speed of the revolution of the magnetic field in the stator winding of the motor. It is the speed at which the electromotive force is produced by the alternating machine….Synchronous Speed.

Number of Poles Synchronous Speed NS in r.p.m
10 600
12 500

What is the synchronous speed of a 50 Hz eight pole motor?

For 50 Hz motors, the speed is 3,000 rpm with 2 poles, and 1,500 rpm with 4 poles.

How does a synchronous motor run at synchronous speed?

synchronous motor, alternating-current electric motor designed to run at a speed that is directly proportional to the frequency of the electric power source. Its rotor produces a constant magnetic field, either from a direct current in its windings or by use of permanent magnets. …

### What is the synchronous speed of a 4 pole motor?

1800 revolutions per minute
Considering a 60 Hz power source, at what speed does a four-pole synchronous motor run? The correct answer is B, 1800 revolutions per minute (RPM).

How to calculate the synchronous speed of a motor?

The synchronous speed can be calculated as: n = f (2 / p) 60 (1) where. n = shaft rotation speed (rev/min, rpm) f = frequency of electrical power supply (Hz, cycles/sec, 1/s) p = number of poles.

What is the synchronous speed of a magnetic field?

This rotating magnetic field moves with a speed called synchronous speed. The Synchronous speed can be calculated as follows: 120 times the frequency (F), divided by the number of poles (P): The synchronous speed decreases as the number of poles increases.

## What is the operating speed of an induction motor?

Operating speed of an induction motor depends on the input power frequency and the number of magnetic poles in the motor. the number of poles in the motor winding. The synchronous speed can be calculated as:

What is the synchronous speed of an alternating machine?

It is the speed at which the electromotive force is produced by the alternating machine. The Synchronous Speed is given by the relation shown below. The above equation (1) shows that the rotor speed N bears a constant relationship with the field poles and the frequency of the generated voltage in the armature winding.