Two pole AC motors operating at 60 Hz will always run at approximately 3600 rpm, and four pole AC motors will have speeds around 1800 rpm.
What RPM is 2 pole?
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.
Which is better 2 pole or 4 pole motor?
2 pole motors have twice the speed of a 4 pole motor. Rotor of the 2 pole motor complete one cycle for every cycle of the source, while the rotor of the 4 pole motor completes only half a cycle for every single cycle of the source. Therefore, 4 pole motors consumes twice the energy of the 2 pole motors.
Why is 4 pole slower than 2 poles?
in a 2-pole motor they are spaced at 180 degrees round the stator, so that means a full revolution per cycle. In a 4-pole motor there isn’t room to do that. The poles are 90 degrees apart, so in a full cycle the rotor only turns 180 degrees. It takes two cycles to do rthe full revolution.
What is the difference between 2 pole 4 pole and 6 pole motor?
On an induction motor, the number of poles determines the speed given the frequency of the power. For a 2 pole motor, at 60hz, it will spin 60 times a second, or 3600rpm. For a 4 pole motor, the speed is halved – 1800 rpm, 6 pole, 1200 rpm and so on.
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.
Can a 60hz motor run on 50hz?
For a generic answer: yes you can, IF: you reduce the voltage by 50/60, the equipment doesn’t care, you don’t care about potentially overheating the motor, the process/load can tolerate the lower speed/torque, etc.
What does 2 pole motor mean?
The magnetic field in the motor shifts by one set of poles (2 for single phase. 3 for 3-phase) every cycle of the incoming electricity. As a result, it takes one cycle of power to make the field rotate a full 360 degrees in a 2 pole motor, and two cycles to do it in a 4 pole motor.
What is the speed of a three pole motor operating at 50 Hz?
Since the formula for governing the synchronous speed of a three-phase motor is n = (120 * Hz)/p if this is a 4-pole motor then at 50 Hz the speed would be 1,500 RPM whereas at 60 Hz the speed would be 1,800 RPM.
What is the advantage of a 4 pole motor?
The 4 pole motor turns at twice the speed, so has a higher horsepower rating than the same size motor at half the speed. This is the formula of synchronous speed u can also say that it is the formula for the speed of stator magnetic field.
Which is better 4 pole or 6 pole motor?
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. However, this is actually the speed of the magnetic field, called the synchronous speed, which is not always equal to the shaft speed.
What does Pole mean in electric motors?
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 the speed of DC motor?
A DC motor runs at 200 rpm speed.
What is a two speed induction motor?
From Wikipedia, the free encyclopedia. A Dahlander motor (also known as a pole changing motor, dual- or two speed-motor) is a type of multispeed induction motor, in which the speed of the motor is varied by altering the number of poles; this is achieved by altering the wiring connections inside the motor.
How many poles are there in 3 phase motor?
For a 3-phase motor, if you count a total of 12 coil groups, it has 4 magnetic poles. For a 12-pole 3-phase machine, there will be 36 coils. The number of magnetic poles in the rotor is equal to the number of magnetic poles in the stator.