Patent ID: 8084912

Claim:
A DC motor comprising: an armature stator including a slotless annular iron core and even numbers of coils wound around an entire circumference of the annular iron core with all the even numbers of coils being wound in an identical direction at equal intervals and rotation angles, the even numbers of coils being connected in series at both ends of all windings, and respective connection portions thereof being input terminals for electric power input; and a bipolar inner magnet rotor having a gap formed outside a rotation diameter between tips of magnetic poles and inside an inner circumference of the annular iron core and a magnetic field of a bar-shaped magnet or a magnetic field of a plate-shaped magnet orthogonal to a rotation shaft; wherein a DC voltage is applied to one of the input terminals of the armature stator and the input terminal in a position 180 degrees diagonal therefrom in accordance with a rotation of the bipolar inner magnet rotor in a sequential and continuous manner in a rotational direction.