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 |
What speed is an 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 difference between 4 pole and 8 pole motor?
For a 4 pole motor, the speed is halved – 1800 rpm, 6 pole, 1200 rpm and so on. As speed decreases, torque increases so an 8 pole motor has 4x the torque of a 2 pole motor (but 1/4 the speed).
What is a 8 pole?
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.
What is the synchronous speed of a 4 pole motor?
Synchronous Speed
| Pairs of Poles | Synchronous RPM | Actual RPM |
|---|---|---|
| 1 | 3600 | 3492–3420 |
| 2 | 1800 | 1746–1710 |
| 3 | 1200 | 1164–1140 |
| 4 | 900 | 873–855 |
Is more poles on a motor better?
More poles result in a lower motor speed: if all other factors are equal, a 4-pole motor will rotate at half the speed of a 2-pole motor. A 60 Hz power supply changes polarity 60 times per second, and a two-pole motor will spin at 3,600 rpm when connected to this source. A four-pole motor will only rotate at 1,800 rpm.
What is the rpm of normal 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. If an application calls for a slower speed and/or higher torque, then a gear motor should be considered.
How do you tell if a motor is 2 pole or 4 pole?
As the name implies, a 2-pole motor has 2 electromagnets; 1 north and 1 south. 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.
How many RPM is a 4 pole motor?
1800 rpm
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. Example 120 x 60 hertz / 4 poles = 1,800 rpm.
What is a 6 pole 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.
Does increasing poles increase torque?
Increasing the pole count can increase the torque capacity, under certain conditions. This happens thanks to the reduced flux per pole, allowing a thinner stator (or rotor) yoke. This can in turn translate to a larger airgap radius or/and deeper slots, both of which lead to increased torque.