# Quick Answer: What RPM is an 8 pole motor?

Contents

## 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?

Synchronous rotation speed at different frequencies and number of poles

Shaft rotation speed – n – (rev/min, rpm)
Frequency – f – (Hz) Number of poles – p –
10 600 120
20 1200 240
30 1800 360

## What is a 8 pole motor?

8 poles motor has 8S and 8N poles. The frame size of the motor increase with an increase in the number of poles. The synchronous speed of the motor is inversely proportional to the number of poles. The synchronous speed of the 4 poles and 8 poles motor is 1500 RPM and 750 RPM respectively.

## How many Poles does an 1800 rpm motor have?

If an electric motor has a nameplate speed of 1,800 rpm, one can conclude that the unit is a 4-pole synchronous motor rated for 60 Hz.

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## How many RPM is 60 Hz?

The speed of 60 Hz 2-pole synchronous generator is 3,600 RPM.

## What is synchronous RPM?

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. Some motors are designed to operate at synchronous speed. …

## How many rpm is a 4 pole motor?

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).

## What is the rpm of dc motor?

DC controls adjust speed by varying the voltage sent to the motor (this differs from AC motor controls which adjust the line frequency to the motor). Typical no load or synchronous speeds for an AC fractional horsepower motor are 1800 or 3600 rpm, and 1000-5000 rpm for DC fractional hp motors.

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

For a 50 Hz (60 Hz) machine if the rated speed is just lower than 3000 rpm (3600 rpm) then it corresponds to 2-poles, if just lower than 1500 rpm (1800 rpm) it corresponds to 4-poles etc. Connect it to 60 hz power and measure speed with tachometer.

## Which brand promotes 8 pole motors?

Hindustan 685 RPM 8 Pole High Efficiency Motor

Speed 685 rpm
Brand Hindustan
STA 3.0
STT 1.6
POT 1.8

## Is more poles on a motor better?

More poles mean more RPM (revolution per minute) so it’s faster than the less poles! and thicker wire more power than thinner one. So most manufacturers design the electric motor depending on how much torque and how much velocity they need.

## How do you find the RPM of a motor pole?

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 you calculate RPM from a pole?

How to Calculate Motor RPM. 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.

## What RPM does a 4 pole rotor produce 60 hertz?

Similarly, for a 4-pole generator, an engine speed of 1,800 rpm produces output of 60 Hz.