Summary:The single phase motor is a type of electrical machine that produces alternating current. This enables the rotor to rota...
The single phase motor is a type of electrical machine that produces alternating current. This enables the rotor to rotate. It is designed for small loads and requires fewer cables than three-phase motors. However, they are less efficient than their three-phase counterparts.
The rotor is cylindrical and contains copper bars, known as conductors, in the form of end rings. These conductive materials generate a magnetic field in the rotor. A capacitor is also required to start the single phase motor.
When the revolving magnetic field in the rotor reaches a certain level, it generates a force 'F' that causes the rotor to rotate. In the process, the forwarding and backward components of the flux cancel each other. Thus, the resultant of these components gives the instantaneous stator flux value.
This type of motor is usually called a written-pole motor. It has a simplistic design that makes it reliable and efficient. Moreover, it provides the capability to start high inertial loads without oversizing.
Another type of single-phase motor is the split-phase motor. It comprises two windings that are connected in parallel to the single-phase supply. As each component rotates, the revolving magnetic field creates an electric field.
Another type of single-phase motor uses a shaded-pole design. It features a bimetallic strip that detects overheating. When this happens, the strip bends towards metal with a higher coefficient of expansion. After a certain point, the strip is cut completely.
Some other types of single-phase motors include the permanent-split capacitor motor and the two-valve capacitor motor.waylead.com.cn