FIG. 7A is a view illustrating a brush motor (having no commutating pole) as a comparative example, and FIG. 7B is a view illustrating the brush motor (having a commutating pole) in FIG. 1;
FIG. 8 is a cross-sectional view of a brush motor as a second example;
FIG. 9 is a view illustrating a magnet angle and a blade angle of the brush motor of FIG. 8;
FIG. 10 is a circuit diagram illustrating a structure of a power supply circuit in the brush motor of FIG. 8;
FIG. 11 is a cross-sectional view of a brush motor as a third example;
FIG. 12 is a view illustrating a magnet angle and a blade angle of the brush motor of FIG. 11;
FIG. 13 is a circuit diagram illustrating a structure of a power supply circuit in the brush motor of FIG. 11; and
FIG. 14 is a graph for describing a magnet angle of a ring magnet.
DETAILED DESCRIPTION
1. First Example
[A. Configuration]
