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 number of pole in motor?

The number of pole pairs (p) or number of poles for an asynchronous motor determines the motor’s synchronous speed: Two-pole and four-pole asynchronous motors are typically used for centrifugal pumps. The rotational speed of these motors can be varied using frequency inverters.

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

4 pole motor completes only half a cycle for every single cycle of the source. A 2 pole motor shows a north-south configuration. A 4 pole motor shows north-south-north-south configuration. 2 pole motor has high speed due to less number of poles.

## What is the rpm of a 4 pole motor?

Motor Wiring and Number of Poles

A 60 Hz power supply changes polarity 60 times per second, and a two-pole motor will spin at 3,600 rpm when connected to this source. A four-pole motor will only rotate at 1,800 rpm. For 50 Hz motors, the speed is 3,000 rpm with 2 poles, and 1,500 rpm with 4 poles.

## What is the difference between a 4 pole and 6 pole motor?

For example, a 6 pole motor may offer more torque and faster acceleration, where the 4 pole motor might offer faster top speed and these variables are all unknown without a dyno and without exhausting all mechanical/electronic tuning options to find the optimal peak power curve for each motor under the same load.

## What is the rpm of a 10 pole motor?

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).

## 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 120 in motor speed formula?

The equation for calculating synchronous speed is: S = 120 f/P speed = constant (120) times frequency of power source (60 Hz) divided by number of poles used in the motor (P).

## How many coils does a 6 pole motor have?

To create a six pole motor use six coils per phase that creates three north poles and three south poles and so on. The number of stator slots is always a multiple of six. When it comes to the pole number it’s always a multiple of two because the north and the South Pole always come in pairs.

## What is a 2 pole 3 phase motor?

On a three-phase motor the pole pattern has to be repeated for each phase. Therefore a 2=pole, 3-phase motor will have six poles.

## What would be the speed of a six pole motor?

Approximate Electrical Motor Speed (rpm) | ||
---|---|---|

No. Poles | Speed with Rated Load | Synchronous Speed (no Load) |

4 | 1725 | 1800 |

6 | 1140 | 1200 |

8 | 850 | 900 |

## Can we increase the RPM of motor?

Yes, but with a small amount above the maximum speed under normal rated conditions. Increasing the speed can be achieved by increasing the supply frequency as the speed and frequency are directly proportional; however, there are two constraints.

## How do you slow down an AC motor?

YES, you can easily slow down or reduce the rated speed by applying variable voltage or frequency. For slip-ring induction motors this process is very easy and it can be done by inserting a series resistance in rotor circuit (it will vary the motor torque also).

## What is a 4 pole 3 phase motor?

. For example, for a four-pole, three-phase motor, = 4 and = 1,500 RPM (for = 50 Hz) and 1,800 RPM (for. = 60 Hz) synchronous speed. The number of magnetic poles, , is equal to the number of coil groups per phase.

## What does a 6 pole motor mean?

6 poles = 1,000 RPM (~970 RPM) 8 poles = 750 RPM (~720 RPM) For a 60 Hz three phase supply: 2 poles = 3,600 RPM (nameplate would list around 3,500 RPM) 4 poles = 1,800 RPM (~1,740 RPM)

## How do I lower the RPM on my electric motor?

A couple of things you can do:

- Use gears to change ratio of speed, which is what you’re going to do. …
- Use a stepper motor, which are commonly used for high-torque, low RPM applications.
- Find some sort of PWM control circuit to slow it down, although you probably won’t be able to get it down to 5-10RPM.