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2 Pole Motors

A 2 pole motor is a type of motor that has two magnetic poles or a pair of magnetic pole, with a north-south configuration. A 2 pole motor consumes less energy, has more revolutions per minute, good noise performance and less work output. This type of motor is not efficient for heavy power applications.

What You Need To Know About 2 Pole Motors

1. 2 pole motor is a type of motor that has two magnetic poles or a pair of magnetic pole.
2. Rotor of the 2 pole motor completes one cycle for every cycle of the source.
3. A 2 pole motor shows a north-south configuration.
4. 2 pole motor has high speed due to less number of poles.
5. 2 pole motor has less workout when compared to a 4 pole motor.
6. 2 pole motor has a good noise performance.
7. A 2 pole motor is cylindrical in shape.
8. A 2 pole motor has more revolution per minute.
9. Gearbox below 3000rpm is always required for a 2 pole motor.
10. A 2 pole motor has higher NPSHR.
11. A 2 pole motor is not suitable for heavy power.
12. 2 pole motor is more efficient.

4 Pole Motors

4 pole motor is a type of motor with 4 magnetic poles or two pairs of magnetic poles, with a north-south-north-south configuration. A 4 pole motor consumes more energy, has fewer revolutions per minute, and delivers more torque per horsepower and work output. This type of motor  is suitable for heavy power applications.

What You Need To Know About 4 Pole Motors

1. 4 pole motor is a type of motor with 4 magnetic poles or two pairs of magnetic poles.
2. 4 pole motor completes only half a cycle for every single cycle of the source.
3. A 4 pole motor shows north-south-north-south configuration.
4. A 4 pole motor has low speed due to more number of poles.
5. 4 pole motor has double work output than a 2-pole motor.
6. A 4 pole motor does not have a good noise performance.
7. The 4 pole motor is not cylindrical.
8. A 4 pole motor has less revolution per minute.
9. Generally, there is no need for gearbox in a 4 pole motor.
10. The 4 pole motor has low NPSHR.
11. 4 pole motor is suitable for heavy power.
12. A 4 pole motor is less efficient.

Main Types of DC Motors

Understanding the different types of DC motors will also help you understand how they’re used for different applications, and which type may apply to your application.

There are 4 main types of DC motors:

1. Permanent Magnet DC Motors

The permanent magnet motor uses a permanent magnet to create field flux. This type of DC motor provides great starting torque and has good speed regulation, but torque is limited so they are typically found on low horsepower applications.

2. Series DC Motors

In a series DC motor, the field is wound with a few turns of a large wire carrying the full armature current. Typically, series DC motors create a large amount of starting torque, but cannot regulate speed and can even be damaged by running with no load. These limitations mean that they are not a good option for variable speed drive applications.

3. Shunt DC Motors

In shunt DC motors the field is connected in parallel (shunt) with the armature windings. These motors offer great speed regulation due to the fact that the shunt field can be excited separately from the armature windings, which also offers simplified reversing controls.

4. Compound DC Motors

Compound DC motors, like shunt DC motors, have a separately excited shunt field. Compound DC motors have good starting torque but may experience control problems in variable speed drive applications.

Between the 4 types of DC motors, the potential applications are numerous. Each type of DC motor has its strengths and weaknesses. Understanding these can help you understand which types may be good for your application.

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