Abstract: A rotor of a motor includes: a stator; a rotor core of a certain shape; a winding coil wound on the rotor core; and a rotor rotated by an electromagnetic interaction with the stator, in which both sides of an end wall of each slot of the I rotor core where the winding coil is inserted are respectively provided with a corner portion to connect both lateral walls of each slot. As a result, the effective area of a flux is increased thereby to decrease flux resistance and to reduce a stacked height of the rotor, that is, the number of stacked thin plates.

Abstract: A bracket assembly of a universal motor comprises: a bracket composed of a base portion formed as a certain shape and coupled to a motor stator, a plurality of supporting portions extendingly formed at the base portion with a certain length, a bearing mounting portion extendingly formed at an end of the supporting portions with a certain shape and for inserting a bearing thereto, a plurality of holder portions extendingly formed at the base portion with a certain shape and having a heat emission insertion hole therein for inserting a brush and emitting heat, and a plurality of spring mounting portions; brushes respectively inserted into the bracket holder portions; and springs respectively coupled to the spring mounting portions of the bracket, for elastically supporting the brush. In the bracket assembly of a universal motor, the number of components constituting the motor is reduced thereby to greatly reduce the fabrication cost.

Abstract: A rotor of a motor includes: a stator; a rotor core of a certain shape; a winding coil wound on the rotor core; and a rotor rotated by an electromagnetic interaction with the stator, in which both sides of an end wall of each slot of the I rotor core where the winding coil is inserted are respectively provided with a corner portion to connect both lateral walls of each slot. As a result, the effective area of a flux is increased thereby to decrease flux resistance and to reduce a stacked height of the rotor, that is, the number of stacked thin plates.

Abstract: A bracket assembly of a universal motor comprises: a bracket composed of a base portion formed as a certain shape and coupled to a motor stator, a plurality of supporting portions extendingly formed at the base portion with a certain length, a bearing mounting portion extendingly formed at an end of the supporting portions with a certain shape and for inserting a bearing thereto, a plurality of holder portions extendingly formed at the base portion with a certain shape and having a heat emission insertion hole therein for inserting a brush and emitting heat, and a plurality of spring mounting portions; brushes respectively inserted into the bracket holder portions; and springs respectively coupled to the spring mounting portions of the bracket, for elastically supporting the brush. In the bracket assembly of a universal motor, the number of components constituting the motor is reduced thereby to greatly reduce the fabrication cost.

Abstract: A rotor of a motor is provided. The rotor includes a rotor core and a winding coil wound on the rotor core. The rotor is rotatable by an electromagnetic interaction with a stator, in which both sides of an end wall of each slot of the rotor core where the winding coil is inserted are respectively provided with a corner portion to connect both lateral walls of each slot. As a result the effective area of a flux is increased thereby to decrease flux resistance and to reduce a stacked height of the rotor, that is, the number of stacked thin plates.