How to determine the turnover of the electric motor

When operating any machine, do not do without an electric motor. Many buy an electric motor with hands without any documentation. In such a situation, there is a problem with the definition of electric motor revolutions. To solve this problem, you can use several ways.

The easiest way to determine the electric motor turns is the use of a tachometer. But the presence of this device in a person who does not specialize in electric motors is rare. Therefore, there are ways to determine the turns on the eyes.

To determine the rotation of the motor, open one of the electric motor covers and find the winding coil. Coils in the electric motor can be several. Choose that coil, which is located in the visibility zone and to which it is easier to access.

Try not to disturb the integrity of the electric motor, do not deliver the items. Do not try to disconnect the parts with each other.

Consider the coil carefully and try to approximately determine its size relative to the stator ring. The stator is the stationary part of the electric motor, the rotor is movable and rotated inside the stator. You will not need a ruler or accurate calculations. The whole procedure is determined by the eye.

Rotor speed - 3000 revolutions per minute, if the coil size closes half the rings of the stator. Rotor rotation speed is less than 1,500 revolutions per minute if the coil size covers a third of the rings. The rotor speed is 1000 revolutions per minute if the coil size is one fourth in relation to the ring.

There is another way to determine the revolutions on the winding. Winding are inside the stator. To do this, you must calculate the number of grooves occupied by the sections of one coil. The total number of core grooves is the number of poles: 2 - 3000 rpm, 4 - 1500 rpm, 6 - 1000 rpm.

All major characteristics of the electric motor must be indicated on the metal tag located on its body. But in the practice of the tag or missing, or the information erased during operation.