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EP0408030A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Control device of vehicle mounted alternator

Assignee: Mitsubishi Electric Corp
•
Filing: 1990-07-12
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Granted: —
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Expires: 2010-07-12
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Abstract

Abstract A control device of a vehicle-mounted, self-excited alternator for supplying a field current to its field coil and selectively a charge current to a battery and a power to a high voltage electric load of the vehicle comprises field current detection means (312) for detecting field current flowing through the field coil (102) and a field current limiter (4) which includes a reference means (401, 402) for providing a fixed reference value, a comparator (403) for ccmparing the field current detected by the field current detection means with the fixed reference value and means responsive to an output of the comparator to control the voltage regulator to cut-off the field current when the field current detected is larger than the reference value.

Inventors

  • 👤 Shiro C/O Mitsubishi Denki K.K. Iwatani
  • 👤 Yoshiyuki C/O Mitsubishi Denki K.K. Iwaki

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-06 05:39
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; H02J7/16; H02J7/163; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/70

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 122 words
A control device of a vehicle-mounted, self-excited alternator having an armature coil and a field coil and including a rectifier for rectifying an a.c. output of said alternator and supplying a field current to said field coil and a charge current to a vehicle-mounted storage battery, a high voltage electric load of said vehicle to be energized by a higher voltage than a terminal voltage of said storage battery and a changeover switch for connecting an output of said rectifier selectively to said storage battery and to said high voltage load, comprising field current detection means for detecting field current flowing through said field coil and a field current limiter for cut-­off field current when the field current exceeds a predetermined value.
Claim 2
Dependent Claim 122 words
A control device of a vehicle-mounted, self-excited alternator having an armature coil and a field coil and including a rectifier for rectifying an a.c. output of said alternator and supplying a field current to said field coil and a charge current to a vehicle-mounted storage battery, a high voltage electric load of said vehicle to be energized by a higher voltage than a terminal voltage of said storage battery and a changeover switch for connecting an output of said rectifier selectively to said storage battery and to said high voltage load, comprising field current detection means for detecting field current flowing through said field coil and a field current limiter for cut-­off field current when the field current exceeds a predetermined value.
Claim 3
Dependent Claim 71 words
The control device claimed in claim 1, wherein said field current limiter comprises a reference means for providing a fixed reference value, a comparator for comparing the field current detected by said field current detection means with said fixed reference value and means responsive to an output of said comparator to control said voltage regulator to cut-off the field current when the field current detected is larger than said reference value.
Claim 4
Dependent Claim 23 words
The control device claimed in claim 2, wherein said comparator includes a negative feedback circuit for preventing an abnormal oscillation of said comparator.

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