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    • 8. 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。
    • 10. 发明授权
    • Commutator
    • 换向器
    • US5266860A
    • 1993-11-30
    • US852579
    • 1992-03-17
    • Akio ChibaMasahisa SobueKazuo TaharaNobuyuki YamashitaShun Suzuki
    • Akio ChibaMasahisa SobueKazuo TaharaNobuyuki YamashitaShun Suzuki
    • H01R39/04H01R39/46H01R43/06H02K13/00H02K13/10
    • H02K13/105H01R39/46H01R43/06
    • A commutator has a central support supporting a plurality of conductive segments separated by a plurality of insulative segments. In addition to providing an insulative function between the conductive segments, the dielectric constant, the area, and the thickness of the insulative segments are chosen so that they provide a capacitive effect, which capacitive effect suppresses current peaks during operation of the commutator. Preferably, the dielectric constant is greater than 10. The central support may include a metal shaft and an insulating ring, which insulating ring is preferably of material with a lower dielectric constant thereby to suppress-shorting between the shaft and the conductive segments. It is particularly advantageous if the conductive and insulative segments are of ceramics material since this provides good wear resistance. In further alternatives, capacitors are formed between the conductive segments by rings or other bodies of insulative materials of a suitably high dielectric constant.
    • 换向器具有支撑由多个绝缘段分隔开的多个导电段的中心支撑。 除了在导电段之间提供绝缘功能之外,选择绝缘段的介电常数,面积和厚度,使得它们提供电容效应,该电容效应抑制换向器操作期间的电流峰值。 优选地,介电常数大于10.中心支撑件可以包括金属轴和绝缘环,该绝缘环优选地具有较低介电常数的材料,从而抑制在轴和导电段之间的短路。 导电和绝缘段是陶瓷材料是特别有利的,因为这提供了良好的耐磨性。 在另外的替代方案中,通过具有适当高介电常数的绝缘材料的环或其它体形成导电段之间的电容器。