Alternator for use in a vehicle
AssigneeHitachi, Ltd.
InventorsToru Inaba, Hideaki Mori, Keizou Kawamura, Susumu Sasaki, Masami Takano, Susumu Tajima, Susumu Terumoto
Life of this patent
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Abstract
An alternator for use in an automobile includes brackets for supporting a rotation shaft at both sides of a rotor, being thermally connected to a stator for supporting the stator, while one side of the rotor is closed by a bracket. A cooling water passage is provided in the bracket, a cooling fan is provided on the closed side of the rotor, and a cooling fin provided opposing to the cooling fan and in vicinity of the cooling water passage, thereby enabling cool down of the stator and the rotor, effectively, with low noises, and thereby obtaining a high power output.
Claims12
An alternator for use in a vehicle, comprising:
- a stator having a stator core being formed in a cylindrical shape and a stator coil wound around said stator core;
- a rotor having pole cores and an excitation coil, being attached on an axially extending rotation shaft, so as to be located within said stator;
- brackets, being thermally connected to said stator for supporting said stator, for supporting said rotation shaft at both sides of said rotor, and being closed at one side of said rotor;
- cooling liquid passages provided in said brackets;
- a cooling fan provided at the closing side of said rotor and
- a cooling fin provided in vicinity of said cooling liquid passages, said cooling fin being arranged so as to oppose said cooling fan in an axial direction of said rotor so as to enable generation of a circulating cooling air flow which flows from said cooling fan via said cooling fin to return to said cooling fan.
An alternator for use in a vehicle, comprising:
- a stator having a stator core being formed in a cylindrical shape and a stator coil wound around said stator core:
- a rotor having pole cores arid an excitation coil, being attached on an axially extending rotation shaft, so as to be located within said stator,
- brackets, being thermally connected to an outer periphery of said stator for supporting said stator, for supporting said rotation shaft at both sides of said rotor, and one of said brackets being closed at at least one side of said rotor;
- an electric appliance disposed with respect to a side surface portion of one of said brackets for supporting said stator;
- cooling liquid passages having an outer peripheral cooling liquid passage formed on an outer peripheral portion of at least the one of said brackets for supporting said stator, and a side surface cooling liquid passage formed on a side surface portion of the one of said brackets which doses the one side of said rotor;
- at least one cooling fan, said at least one cooling fan being provided at the closed side of said rotor;
- and
- a cooling fin provided in vicinity of said side surface cooling liquid passage, said cooling fin being arranged so as to oppose said cooling fan in an axial direction of said rotor so as to enable generation of a circulating cooling air flow which flows from, said cooling fan via said cooling fin to return to said cooling fan.
Dependencies are inferred from the claim text.