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    • 20. 发明授权
    • DC Electric motor having field poles of permanent magnet
    • 直流电动机具有永磁体的场极
    • US4823037A
    • 1989-04-18
    • US113511
    • 1987-10-28
    • Toshimi AbukawaKazuo TaharaNoriyoshi TakahashiToshio Tomite
    • Toshimi AbukawaKazuo TaharaNoriyoshi TakahashiToshio Tomite
    • H02K21/26H02K23/04H02K23/16H02K23/18
    • H02K23/18H02K23/04
    • A DC electric motor which comprises: a reversibly rotatable rotor having an armature core, an armature winding and a commutator; a stator having a yoke and a plurality of field poles provided on an inner circumference of the yoke and each having a permanent magnet and an auxiliary pole; and brush means including a plurality of brushes arranged to be slidably electrically conductively in contact with the commutator; in which the auxiliary pole of each of the field poles is disposed at an exit side of the field pole in the normal foward rotating direction of the rotor; each of the brushes is held movably between a first position corresponding to a position near a geometrically neutral point between a pair of adjacent field poles and a second position corresponding to a position separated at the maximum by an electrical angle of 90 degrees from the geometrically neutral point reversely to the normal rotating direction, and each of the brushes is fixed in the vicinity of the second position in normal use.
    • 一种直流电动机,包括:具有电枢铁心的可逆旋转转子,电枢绕组和换向器; 具有轭和设置在所述轭的内周上并且各自具有永磁体和辅助极的多个场极的定子; 以及刷装置,包括布置成可滑动地导电地与换向器接触的多个电刷; 其中每个场极的辅助极设置在转子的正常转动方向上的场极的出射侧; 每个刷子可移动地保持在对应于在一对相邻场磁极之间的几何中性点附近的位置的第一位置和对应于在最大距离处离开几何中性的电角度90度的位置的第二位置 与正常旋转方向相反,并且每个电刷在正常使用中固定在第二位置附近。