Patent ID: 8415850
Filing Date: 2013-04-09
Classification: H02K

Abstract:
1. A universal motor comprising: a stator comprising a stator core and a winding wound on the stator core; and a rotor rotatable relative to the stator; wherein the stator core has an E-shape cross section and comprises a main part and three extension parts extending from the main part in the same direction, each extension part having an arc surface, the arc surfaces of the three extension parts of the E-shaped stator core cooperatively forming a space into which the rotor is received, the arc surface of each extension part extending along a periphery of the space, wherein the winding is wound on one or more of the extension parts; and wherein the extension parts comprise a middle extension part extending from a middle position of the main part, and two side extension parts respectively extending from opposite ends of the main part, and the diameter of the rotor is greater than the width of the middle extension part in a direction from one of the ends of the main part to the other end.