| 摘要 |
A pair of magnets (51, 52) oppositely disposed on each side of a rotor 1 are respectively magnetised such that the surface of each magnet facing the rotor 1 includes the North and South poles in a predetermined proportion. When no electric current is supplied to the coil, the rotor (1) rests at a magnetically stable position where the rotor 1 is inclined by a displacement angle alpha relative to the vertical axis Y of the two-pole motor. A pair of commutators (31, 32) are mounted on a shaft (4) of the rotor (1) as displaced in a rotation direction by a displacement angle ( beta ) relative to the longitudinal axis (y) of the rotor (1), such that the commutators (31, 32) remain in contact with the fixed brushes (61, 62) in the static state of the rotor (1). The surface of each magnet facing the rotor (1) is magnetised to include an unlike pole in a proportion of 15 to 20%. The displacement angle alpha and the displacement angle beta are related by alpha < beta <45 DEG .
|
