# What is 2 pole and 4 pole motor?

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A 4-pole motor has 4 eletromagnets; 2 north and 2 south. On a 4-pole motor, the magnets are set up in a north-south-north-south configuration. Basically, a 2-pole motor is a good RPM motor while a 4-pole motor, having more magnets, will have more torque.

## Which is better 2-pole or 4-pole generator?

A 2-pole generator is often used because this avoids the need for a gearbox, but in many cases a 4-pole generator with gearbox would have a lower investment cost and provide a better utilization factor. For systems running at 3600 rpm, 2-pole generators are the favored option because gearboxes are not needed.

## What phase is a 4-pole motor?

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 many RPM is a 2-pole motor?

A two-pole motor operates at 3,600 rpm (7,200 rpm Ã· 2) unloaded, and approximately 3,450 under load. Two-pole motors often are found in pump applications, such as sump pumps, swimming pool pumps, and water recirculating equipment.

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

RE: How to tell how many poles a motor has.

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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 is a pole in motor?

The pole count of a motor is the number of permanent magnetic poles, north and south, on the rotor. There is always the same number of north and south poles on the rotor. For example, in a 12 pole motor, there are 6 north poles and 6 south poles. This motor would also be considered a 6 pole-pair motor.

## 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 is the difference between 4-pole and 6 pole motors?

Using this equation, a 4-pole motor at 60Hz has a speed of 1,800 rpm, while a 6-pole motor at 50Hz has a speed of 1,000 rpm. … In a synchronous motor, the rotor uses a permanent magnet or electromagnet to rotate at the calculated speed. On the other hand, an induction motor will operate slightly below the calculated rpm.

## What is a 3 pole motor?

A three pole electric DC motor. A DC motor generates a rotating force via attraction and repulsion of magnetic fields. The magnetic fields in a three pole DC motor are generated by three electromagnets and two permanent magnets, as shown on the right.

## What is the synchronous speed of 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).

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## Which is the fastest DC motor?

The British appliance manufacturer Dyson claims to have developed the world’s fastest, most efficient motor for domestic appliances. The Dyson Digital Motor (DDM) v2 is a single-phase brushless DC motor, which operates at speeds up to 104,000 rpm with a claimed efficiency of 84%.

## What is speed of motor?

Speed of a motor is the magnitude of the rotational velocity of the motor shaft. In a motion application, speed of the motor dictates how fast the axis rotates – the number of complete revolutions per unit time.

## What is single phase motor?

What is a single-phase motor? A single-phase motor is an electrically-powered rotary machine that can turn electric energy into mechanical energy. It works by using a single-phase power supply. They contain two types of wiring: hot and neutral. Their power can reach 3Kw and supply voltages vary in unison.

## Which type of motor is mostly used in the industry?

3-phase AC induction motors are the most widely used motors in industrial and commercial applications.

## How are poles calculated?

To determine the number of poles, you can read the data plate directly or calculate it from the RPM stated on the data plate or you can count the coils and divide by 3 (poles per phase) or by 6 (pairs of poles per phase).