2 Pole Motors vs. 4 Pole Motors
Main DifferenceThe main difference between 2 Pole Motors and 4 Pole Motors is that 2 Pole Motors have a single pair of magnetic poles whereas 4 Pole Motors have two pairs of magnetic poles.
Difference Between 2 Pole Motors and 4 Pole Motors
2 Pole Motors vs. 4 Pole Motors
A type of motor that has two magnetic poles or a pair of magnetic poles is known as a 2 pole motor whereas, a type of motor with 4 magnetic poles or two pairs of magnetic poles is known as a 4 pole motor.
2 Pole Motors vs. 4 Pole Motors
A 2 pole motor shows north-south configuration; on the other hand, a 4 pole motor shows north-south-north-south configuration.
2 Pole Motors vs. 4 Pole Motors
A 2 pole motor has high speed due to less number of poles. Conversely, a 4 pole motor has low speed due to more number of poles.
2 Pole Motors vs. 4 Pole Motors
A 2 pole motor is more efficient on the flip side, a 4 poles motor is less efficient.
2 Pole Motors vs. 4 Pole Motors
A 2 pole motor has more RPM value; on the other side, the 4 poles motor has fewer revolutions per minute.
2 Pole Motors vs. 4 Pole Motors
A 2 pole motor is not good for heavy power while, for heavy power, 4 pole motor is best.
2 Pole Motors vs. 4 Pole Motors
Gearbox below 3000rpm is always required for a 2 pole motor; on the other hand, generally, there is no need for gearbox in a 4 pole motor.
2 Pole Motors vs. 4 Pole Motors
The rotor of a 2 pole motor completes a single cycle for each cycle of the source whereas, the rotor of a 4 pole motor brings to an end only half cycle for every single cycle of the source.
2 Pole Motors vs. 4 Pole Motors
A 2 pole motor has less work output, on the flip side, a 4 pole motor has double work output than a 2 pole motor.
2 Pole Motors vs. 4 Pole Motors
A 2 pole motor has higher NPSHR while a 4 pole motor has low NPSHR.
2 Pole Motors vs. 4 Pole Motors
A 2 pole motor consumes less energy. Conversely, a 4 pole motor spends double energy than a 2 pole motor.
2 Pole Motors vs. 4 Pole Motors
A two-pole motor is cylindrical in shape; on the other hand, the 4 pole motor is not cylindrical.
2 Pole Motors vs. 4 Pole Motors
2 pole motors have 1.5 ft.-lbs of torque per horsepower whereas, the 4 pole motor has 3.0 ft.-lbs of torque per horsepower.
2 Pole Motors vs. 4 Pole Motors
A 2 pole motor has good noise performance while the 4 pole motor is not good in noise performance.
Comparison Chart
| 2 Pole Motors | 4 Pole Motors |
| A type of motor that has two magnetic poles or a pair of magnetic poles is known as a 2 pole motor. | A type of motor with 4 magnetic poles or two pairs of magnetic poles is known as a 4 pole motor. |
| Configuration | |
| A 2 pole motor shows a north-south configuration. | A 4 pole motor shows north-south-north-south configuration. |
| Speed | |
| A 2 pole motor has high speed due to less number of poles. | A 4 pole motor has low speed due to more number of poles. |
| Efficiency | |
| A 2 pole motor is more efficient. | A 4 poles motor is less efficient. |
| Revolution Per Minute (RPM) | |
| A 2 pole motor has more RPM value. | A 4 poles motor has less revolutions per minute. |
| For Heavy Power | |
| A 2 pole motor is not good for heavy power. | For heavy power, 4 pole motor is best. |
| Gearbox | |
| Gearbox below 3000rpm is always required for a 2 pole motor. | Generally, there is no need for gearbox in a 4 pole motor. |
| Completion of Cycle | |
| The rotor of a 2 pole motor completes a single cycle for each cycle of the source. | The rotor of a 4 pole motor brings to an end only half cycle for every single cycle of the source. |
| Work Output | |
| A 2 pole motor has less work output. | A 4 pole motor has double work output than a 2 pole motor. |
| NPSHR | |
| A 2 pole motor has higher NPSHR. | The 4 pole motor has low NPSHR. |
| Energy Consumption | |
| A 2 pole motor consumes less energy. | A 4 pole motor spends double energy than a 2 pole motor. |
| Shape | |
| A 2 pole motor is cylindrical in shape. | The 4 pole motor is not cylindrical. |
| Torque | |
| 2-pole motors have 1.5 ft.-lbs of torque per horsepower. | The 4-pole motors have 3.0 ft.-lbs of torque per horsepower. |
| Noise Performances | |
| A 2 pole motor has good noise performance. | The 4 pole motor is not good in noise performance. |
2 Pole Motors vs. 4 Pole Motors
A motor is a device that transforms electrical energy into mechanical energy in the form of torque supplied through a shaft. It functions on the principle of electromagnetic induction as defined by Michael Faraday. There are different types of motors, e.g., 2 pole motors and 4 pole motors, etc.
A 2 pole motor is a type of motor that has two magnetic poles or a pair of the magnetic pole, i.e. north and south. On the other side, 4 pole motor is the motor with two pairs of magnetic poles present in alternating orders, i.e. north-south-north-south.
The number of poles has an inverse relationship with speed, i.e. more the number of poles less will be the speed of the motor. So, a 2 pole motor has more speed than a 4 pole motor. But, for heavy power, 4 pole motor is best than 2 pole motor. Gearbox below 3000rpm is always required for a 2 pole motor. On the flip side, Generally, there is no need for gearbox in a 4 pole motor.
A 4 pole motor has double work output than a 2 pole motor. The rotor of a 2 pole motor completes a single cycle for each cycle of the source. On the other side, the rotor of a 4 pole motor brings to an end only half cycle for every single cycle of the source.
What are 2 Pole Motors?
A 2 pole motor is a type of motor with two magnetic poles or a pair of magnetic poles. It shows a north-south configuration. A 2 pole motor is more efficient with high speed and more RPM. At 60 Hz, a 2-pole motor has 3600 rpm. But, it delivers low torque, i.e., 1.5 ft.-lbs of torque per horsepower. Moreover, it also consumes less energy and has less work output. This type of motor is not good for heavy power.
What are 4 Pole Motors?
A 4 pole motor is a type of motor that has 4 magnetic poles or two pairs of magnetic poles. It shows north-south-north-south configuration. A 4 pole motor is less efficient with less speed and less RPM. It shows 1800 rpm at 60 Hz. But, it delivers more torque, i.e., 3.0 ft.-lbs of torque per horsepower. It consumes more energy and twice works output than a 2 pole motor. This type of motor is good for heavy power.
ConclusionAbove discussion summarizes that a 2 pole motor is a more efficient and high-speed motor with less work output. On the other hand, a 4 pole motor is a less efficient motor with less speed but more work output.
