Mitsubishi Denki Kabushiki Kaisha

Shigeru Onoue

Kazunori Tanaka

Nobuatsu Yoshioka

Junichiro Otsuka

An AC generator structure allows the assembly of a stator thereof to be easily automatized for rationalization of the manufacturing process, while ensuring suppression of heat generation and providing an enhanced cooling function during operation. The stator includes a core and a winding assembly having stator windings. A rotor is enclosed by the core. A rectifier device rectifies an AC power taken out from the winding assembly. In the stator, outgoing conductors form output conductor end portions and connecting conductor end portions, which are substantially parallel to the core's center axis. The connecting conductor end portions are connected to a connecting member distinct from the rectifier device and disposed offset laterally from the stator's center axis. The stator windings are interconnected in a predetermined connection pattern through the connecting member. The output conductor end portions, through which the AC power is taken out, are connected to the rectifier device.

Vehicle-onboard AC generator

To prevent water entering a labyrinth from flowing into contact portions between slip rings and brushes, the labyrinth is formed as a stepped structure by an annular slinger-side stepped portion projecting toward a generator shaft from the inner peripheral surface of a slinger unit and a slip ring-side stepped portion projecting toward the slinger unit from the outer peripheral surface of a slip ring support unit.

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Tokyo, Japan

Shigeru Onoue