How do you determine the number of poles on an electric motor?

The formula is n = 60 x f /p where n = synchronous speed; f = supply frequency & p = pairs of poles per phase. The actual running speed is the synchronous speed minus the slip speed.

How do you tell if a motor is 2 pole or 4 pole?

RE: How to tell how many poles a motor has. Forgive me mentioning, the straightforward way to tell is to look at nameplate speed and figure it form there. 60hz motor at just below 3600rpm is 2-pole, at jut below 1800rpm 4 pole, just below 1200rpm6 pole.

What RPM is a 12 pole motor?

600 RPM
12-pole motors, which are even less common than six-pole and eight-pole models, run at 600 RPM without a load, and 16-pole motors run at 450 RPM.

How do you calculate the RPM of an electric motor?

To determine 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. Yourself then divide by the number of poles the motor has: (Hz x 60 x 2) / number of poles = no-load RPM.

How do you find poles?

Identify any zeros in the numerator that are also zeros in the denominator, along with their multiplicities. Each zero in the denominator is a pole whose order is given by taking the multiplicity in the denominator and subtracting away the multiplicity in the numerator.

How is pole pitch calculated?

Pole Pitch is equal to the total number of armature slots divided by the total number of poles in the machine. For example, if there are 96 slots on the armature periphery and 4 poles, the number of armature slots that come between two adjacent pole centers would be 96/4 = 24.

How many rpm is a 8 pole motor?

To satisfy consumers’ desires for quieter motors, manufacturers have developed eight-pole motors. These operate at 900 rpm (unloaded) and approximately 800 rpm under load. They are being used in applications where customers expect quieter operation, such as room air conditioners and outdoor heat pump applications.

What is the rpm 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). The rotor (Figure above) consists of a permanent magnet bar and a steel induction motor cup.

How many rpm is a 4 pole motor?

1,800 rpm
A four-pole motor will only rotate at 1,800 rpm.

Poles = number of poles of your motor. So, for example, if you have a 4 pole motor on 60 Hz then RPM=60* (2/4)*60=1800 rpm.

How do I calculate the number of Poles in a motor?

Most of the time, the motor nameplates do not contain the number of poles data on them. The number of poles in a motor can be calculated from its synchronous speed and its rated frequency. Here is a simple synchronous number of poles calculator. The rated synchronous speed of the motor.

What is the difference between rpm and rpm Poles?

RPM = shaft rotation speed or revolutions per minute. Poles = number of poles of your motor. So, for example, if you have a 4 pole motor on 60 Hz then RPM=60* (2/4)*60=1800 rpm.

What is the RPM of a 2 poles induction motor?

The RPM data is engraved into the nameplate of the motor. The synchronous speed of the motor is 3000,1500,1000,750,600 RPM etc for 2,4,6,8,10 poles induction motor ( Ns=120f/P)… The actual speed of the motor is somewhat less than the synchronous speed of the motor. The actual speed of the 2 poles machine may be in the range of 2900 RPM to 2980 RPM.