| 摘要 |
<p>A three-phase DC motor includes a rotor 30 having poles 30a; a stator 28 including a plurality of core units 32b that are arranged around the rotor 30 and have an inner surface opposite to an outer surface of the rotor 30; and three or more coils wound around the core units 32b. The outer surface of the rotor 30 has alternating poles of N and S around the circumference of the rotor 30. The coils 35a, 35b, 35c, and 35d are placed only within a range defined by second virtual planes P2, these second virtual planes being specified respectively by rotating a first virtual plane P1 according to a predetermined angle in a rotor rotating direction and a direction opposite thereto. The first virtual plane P1 is a plane passing through the axial center O of the rotor 30. The inner surface of the adjacent 3N (N = 1, 2, 3, ...) number of core units 32b of the core units 32b, 32b, ... are delimited in within a width of one pole on the outer surface of the rotor 30.</p> |
