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Generators or Motors

Alternator

Using a micromachined magnetostatic relay in commutating a DC motor

FIGS. 1A and 1B show a normally-open microelectronic mechanical system (MEMS) relay or switch 100. ...

Permanent magnet field-type rotating machine

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Plain carbon steel hub for data storage device

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Disk storage device with improved spindle torque and acceleration

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Magneto generator

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Alternator for vehicles having permanent magnets in rotor

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Compliant vibration isolation housing assembly for a data storage system

The present invention is a vibration isolation apparatus and method for attenuating vibrations in a ...

Apparatus for absorbing stator vibrations in computer storage apparatus

Accordingly, one object of the present invention is to provide a rotary driving apparatus that ...

Easy to manufacture covering device of a hard disk drive that dampens vibrations and seals internal components within

Accordingly, the present invention has been made in an effort to solve the problems occuring in the ...

Magnetic disc unit

An object of the present invention is to provide a rotary recording apparatus which can, on one ...

Alternator

Details

Inventors: Asao, Yoshihito;
Assignee: Mitsubishi Denki Kabushiki Kaisha (Tokyo, JP)
Primary Examiner: Lam; Thanh
Assistant Examiner:
Attorney, Agent or Firm: Sughrue Mion, PLLC

An alternator exhibits uniform temperature distribution in a rectifier, thereby preventing a locally hot spot from being developed. Positive-side diodes and negative-side diodes are arranged in a zigzag pattern in a circumferential direction, and formed of diodes on an inside diameter side and diodes on an outside diameter side.

DETAILED DESCRIPTION Accordingly, the present invention has been made with a view toward solving the problems described above, and it is an object thereof to provide an alternator that exhibits uniform temperature distribution in a rectifier, thereby preventing a locally hot place from being developed.
To this end, according to one aspect of the present invention, there is provided an alternator having at least a first diode assembly or a second diode assembly composed of diodes on an inside diameter side and diodes on an outside diameter side arranged in a zigzag pattern in a circumferential direction.
In a preferred form of the alternator in accordance with the present invention, the diodes on the inside diameter side and the diodes on the outside diameter side are provided in recessions of a heat sink having a recessed surface, and protuberances associated with the recesses are formed in a rear surface of the heat sink.
In a preferred form of the alternator in accordance with the present invention, one of the diode on the inside diameter side and the diode on the outside diameter side is disposed such that it is partly included in a region of an air detachment portion produced on a peripheral surface by cooling air that collides with the other of the diode on the inside diameter side and the diode on the outside diameter side.
In another preferred form of the alternator in accordance with the present invention, if a distance between a central point of a columnar diode on the inside diameter side and a central point of its adjacent columnar diode on the outside diameter side is denoted as W, and a diameter of the diode on the inside diameter side and the diode on the outside diameter side is denoted as D, then (W/D)<2.
Furthermore, if an angle at which a line connecting a central point of the diode on the inside diameter side and a central point of its adjacent diode on the outside diameter side crosses a line connecting a central axis of a shaft and the central point of the diode on the outside diameter side or the diode on the inside diameter side is denoted as

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