Rectifier of alternating-current generator for vehicle

Abstract

A rectifier (2) for full-wave rectification of an output of an alternating-current generator (1) for a vehicle, wherein Schottky barrier diodes are used as constituent rectifying semiconductor devices (201, 202) of the rectifier (2), said Schottky barrier diodes having the characteristics of a low forward voltage drop for a forward current and a low reverse leakage current.

Description

technical field [0001] The present invention relates to a rectifier device in an alternator mounted on a vehicle, and more particularly to a rectifier device for an automotive alternator using a Schottky barrier diode as a semiconductor element constituting the rectifier device. Background technique [0002] image 3 It is a circuit configuration diagram showing an example of a conventional rectifier device for an automotive alternator. [0003] A conventional rectifying device for an automotive alternator includes: an alternator 1 including an excitation coil 102 driven by a vehicle engine (engine equipment) not shown in the figure to generate a rotating magnetic field; The armature winding 101 that generates and outputs an AC voltage through a magnetic field; the rectifier 2, which rectifies the generated voltage of the alternator 1 and provides it to the battery 4 or an electric load 6 through the main terminal; the voltage regulator 3, which The voltage regulator 3 cont...

AI Technical Summary

Problems solved by technology

[0006] In such a PN junction diode, the forward voltage drop against the forward current is large, so the output voltage cannot rise, and there is a limit to the output current

[0007] In addition, there is a problem that the forward voltage drop of the PN junction diode is large, and heat generation due to power loss is large, so that the temperature of the armature winding 101 of the alternator becomes high, and the output current is suppressed.

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