Patent ID: 6756718
Filing Date: 2004-06-29
Classification: H02K,Y10T

Abstract:
A positioning structure for air fan induction element and stator, comprising:a stator having a first shaft opening and a plurality of pole struts, one pole strut having a front end opposing a rear end of a neighboring pole strut; a circuit board having a second shaft opening which has a diameter generally equal to the first shaft opening and engageable with the stator; and an induction element located at a selected position in a zone defined by a circle concentric with a center of the second shaft opening, and in a range defined by a base line Â±10 degrees, with the base line formed by the eguipartition plane of the opposing front end and the rear end of the two neighboring pole struts intersecting with the circuit board thereby to position a quadruple-pole stator to accommodate electric current, air pressure and air flow rate and rotation speed of the air fan to enhance air fan durability.