What is cover pole electric machinery?

4, the magnetic field that auxiliary winding place produces and advocate the phasic difference with the magnetic field constant presence of winding, formed after both interaction a circle or rotate elliptically magnetic field, produce the moment of force that start to drive electric machinery to rotate thereby.
5, the auxiliary winding of cover pole electric machinery is cover pole annulus (call short circuit annulus, copper annulus again) ; It is passed cover one fraction advocate extremely magnetic field, produce another thereby with advocate the cover that magnetic field has phasic difference extremely magnetic field; One is formed to rotate elliptically after interaction of two magnetic field magnetic field. “ is overspread extremely ” electric machinery gets a name because of this.