discount single phase induction motor classification
In theory, if measures are taken to allow the current flowing through the two sets of windings of the single-phase motor to have a certain phase difference, it can be started. How to make a certain phase difference between the magnetic potential or flux that has been staggered at a certain angle in two spaces is the starting point for solving the startup problem. Based on this, the single phase AC asynchronous motor can be divided into two major categories: phase type and electrode type.
Single-phase motor
Segmental single-phase Motors use capacitors or resistor strings to play a phase shift role in the emotional start winding, causing the current phase of the start-up winding and the working winding to stagger, the so-called "phase splitting".
Shaded Uniphase motor
Embedding a part of the stator magnetic pole with a short-circuit copper ring or a short route loop(group) constitutes a shaded Uniphase motor. The shaded unipolar motor includes two types: convex pole and hidden pole.
When the stator windings pass through a single-phase alternating current, most of the pulse magnetic fields generated by it are directly coupled to the rotor through the air gap, and a small part of the flux generates an induction flux when passing through the copper ring of the shield. After synthesis, the rotor magnetic path is entered through the air gap. According to Lenz's law, the induced flux always hinders the change of the original flux, and the induced flux phase lags behind the original flux. In this way, there are two magnetic flux that are staggered at a certain angle in space and have a certain phase difference. The synthetic magnetic field is a rotating magnetic field with a large ellipticity. The rotating direction of the hood-pole motor is fixed from the unhooded part to the shaded part, and its power is small, the starting torque is small, the structure is simple, the price is low, and the maintenance is simple. Covered polar motors are generally used for small blower motors and electric fan Motors.
