Sage-Tips

What is the rpm of a 6 pole motor?

1,200 rpm
Six-pole motors run at 1,200 rpm unloaded (7,200 ÷ 6) and between 1,050 and 1,175 rpm loaded.

How do you calculate RPM from motor voltage?

For an AC motor, the number of poles and the frequency determine the no-load RPM….For a 60 Hz system with four poles, the calculations to determine RPM would be:

1. (Hz x 60 x 2) / number of poles = no-load RPM.
2. (60 x 60 x 2) / 4.
3. 7,200 / 4 = 1,800 RPM.

What is the rpm of a 3 pole motor?

Approximate Electrical Motor Speed (rpm)
No. Poles	Speed with Rated Load	Synchronous Speed (no Load)
2	3450	3000
4	1725	1500
6	1140	1000

Which type of electric motor is most efficient?

Tests carried out on a 44 megawatt 6-pole synchronous ABB motor shortly before delivery showed an efficiency 0.25 percent greater than the 98.8 percent stipulated in the contract, resulting in the world record for electric motor efficiency.

How many rpm is a 4 pole motor?

1,800 rpm
A four-pole motor will only rotate at 1,800 rpm.

How to calculate full load rpm of a DC motor?

To calculate the full-load RPM: RPM – RPM slip = full-load RPM The RPM of a DC motor depends on the voltage supplied to the motor. Typically, the manufacturer of the motor will tell you the RPM you can expect at various voltages. To achieve the desired RPM, you can then adjust the voltage according to the guidelines.

What is a reasonable full-load speed for a 60 Hz motor?

A reasonable full-load speed for a 60 Hz, four-pole motor would be 1,725 RPM. The slip is the difference between the no-load speed and the full-load speed. In this case, that would be: Full-load RPM – no-load RPM = RPM slip

What is the RPM of a motor with two poles?

At 60 Hz, a motor with two poles operates at 3,600 RPM with no load and about 3,450 RPM with a load: 1 (Hz x 60 x 2) / number of poles = no-load RPM 2 (60 x 60 x 2) / 4 3 7,200 / 2 = 3,600 RPM

How to calculate electric motor load in good condition?

LOAD = (Pi / Pir) x 100\%. LOAD = (20.4/19) x 100\%. Output power as a \% of rated power = 107.4\%. * From this example value,we can determine our electric motor load in good condition.It is 100\% with output power to drive the equipment.It efficiency and not to run with overload.