| 摘要 |
An electric motor apparatus providing increased output torque and allowing rotation in a predetermined direction includes a rotor 135 having a permanent magnet having two magnetic poles spaced from each other by approximately 180 degrees about a rotation axis, a stator having a substantially (T-shape (Y-shape) as a whole and having first, second and third magnetic pole portions 112, 114 and 116 disposed around the rotor and connecting portions 122, 124 and 126, which are narrow in their middle regions and each connects between an associated pair of adjacent magnetic pole portions, a first electromagnetic coil 140 inducing a magnetic circuit that passes through the first and second magnetic pole portions, and a second electromagnetic coil 142 inducing a magnetic circuit that passes through the second and third magnetic pole portions. The first and second electromagnetic coils are set parallel to and at opposite sides of the second magnetic pole portion 112. The first electromagnetic coil has one and other ends magnetically coupled to the first and second magnetic pole portions, respectively. The second electromagnetic coil has one and other ends magnetically coupled to the third and second magnetic pole portions, respectively. The first and second electromagnetic coils are selectively excited to control the rotation of the rotor.
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