Patent EP0118779A1 successfully refreshed from Google Patents.
EP0118779A1
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EP
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Voltage regulator for charging generator
Assignee: Hitachi Ltd
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Filing: 1984-02-10
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Granted: —
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Expires: 2004-02-10
Abstract
Abstract A voltage regulator for a charging generator is disclosed which comprises an a.c. generator having armature windings (1) and a field winding (2), and a battery (9) which receives the rectified output of the a.c. generator and is charged by the same. The voltage regulator (6) regulates the output voltage of the a.c. generator by controlling the current flowing through the field winding (2). To prevent the output voltage of the a.c. generator from becoming a high voltage when a connecting wire connecting the rectified output of the a.c. generator to the battery is broken, the regulator includes also abnormality detection means (30, 50) which compares the rectified output (V L ) of the a.c. generator with the battery voltage (V s ) and detects the abnormality when both voltages are different by more than a predetemined value. This arrangement makes it possible to detect the abnormality at the point of time where the output voltage of the a.c. generator is not yet much high.
Inventors
- 👤 Keiichi Mashino
- 👤 Morio Satou
- 👤 Shouju Masumoto
- 👤 Kunio Kobayashi
- 👤 Osamu Miki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 16:23
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/06; H02H7/067; H02J; H02J7/00; H02J7/14; H02J7/16; H02J7/80; Y; Y10; Y10S; Y10S320/00; Y10S320/13
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
147 words
A voltage regulator for a charging generator comprising: an a.c. generator having armature windings (1) and a field winding (7); rectification means (3, 4, 5) for rectifying the a.c. output of said a.c. generator to d.c.; a battery (9) connected to the output terminal of said rectification means and receiving the power from said a.c. generator; a voltage regulator (6) comparing the battery voltage with a reference voltage and controlling the current flowing through said field winding (2); abnormality detection means (30) for comparing the output voltage of said rectification means (V L ) with the battery voltage (V S ) and producing the output thereof when the difference between both voltages exceeds a predetermined value; and current cut-off means (13-17) for controlling said voltage regulator by means of the output of said abnormality detection means and cutting off the current supplied to said field winding (7).
Claim 2
Dependent Claim
147 words
A voltage regulator for a charging generator comprising: an a.c. generator having armature windings (1) and a field winding (7); rectification means (3, 4, 5) for rectifying the a.c. output of said a.c. generator to d.c.; a battery (9) connected to the output terminal of said rectification means and receiving the power from said a.c. generator; a voltage regulator (6) comparing the battery voltage with a reference voltage and controlling the current flowing through said field winding (2); abnormality detection means (30) for comparing the output voltage of said rectification means (V L ) with the battery voltage (V S ) and producing the output thereof when the difference between both voltages exceeds a predetermined value; and current cut-off means (13-17) for controlling said voltage regulator by means of the output of said abnormality detection means and cutting off the current supplied to said field winding (7).
Claim 3
Dependent Claim
64 words
The voltage regulator for a charging generator as defined in claim 1 wherein said abnormality detection means includes a differential amplifier (30) detecting the voltage difference between the output voltage (V L ) of said rectification means and the battery voltage (V S ), and a comparator (19) producing the output thereof when the output of said differential amplifier (30) exceeds a predetermined value.
Claim 4
Dependent Claim
41 words
The voltage regulator for a charging generator as defined in claim 1 wherein said abnormality detection means consists of a comparator (50) detecting the ratio of the output voltage (VL) of said rectification means to the battery voltage (V S ).
Claim 5
Dependent Claim
34 words
The voltage regulator for a charging generator as defined in claim 1 which further includes a holding circuit (17) for holding the output of said abnormality detection means until said holding circuit is reset.
Claim 6
Dependent Claim
253 words
A voltage regulator for a charging generator comprising: an a.c. generator having armature windings (1) and a field winding (2); main rectification means (3, 4) and auxiliary rectification means (5), each for converting the a.c. output of said a.c. generator to d.c.; a battery (9) connected to the output terminal of said main rectification means (3, 4) and receiving the power from said a.c. generator; said field winding (2) being connected to said battery through a key switch (8) and a charge lamp (7) and to the output terminal of said auxiliary rectification means (5); comparison means (18) for comparing the battery voltage (V S ) with a reference voltage; switching means (13) subjected to control by the output of said comparison means (18) and controlling the current flowing through said field winding; abnormality detection means (30, 50) comparing the output voltage (VL ) of said auxiliary rectification means with the battery voltage (V S ) and generating the output thereof when the difference of both voltages exceeds a predetermined value; current cut-off means (13-17) for controlling said switching means by the output of said abnormality detection means (30, 50) and cutting off the current supplied to said field winding (2); and a load (12) connected to said charge lamp on the opposite side to said battery; wherein a current flows through a circuit ranging from said battery (9), said charge lamp (7) and said load (12) when abnormality occurs, and said charge lamp (7) is lit to raise the alarm of abnormality.
Claim 7
Dependent Claim
253 words
A voltage regulator for a charging generator comprising: an a.c. generator having armature windings (1) and a field winding (2); main rectification means (3, 4) and auxiliary rectification means (5), each for converting the a.c. output of said a.c. generator to d.c.; a battery (9) connected to the output terminal of said main rectification means (3, 4) and receiving the power from said a.c. generator; said field winding (2) being connected to said battery through a key switch (8) and a charge lamp (7) and to the output terminal of said auxiliary rectification means (5); comparison means (18) for comparing the battery voltage (V S ) with a reference voltage; switching means (13) subjected to control by the output of said comparison means (18) and controlling the current flowing through said field winding; abnormality detection means (30, 50) comparing the output voltage (VL ) of said auxiliary rectification means with the battery voltage (V S ) and generating the output thereof when the difference of both voltages exceeds a predetermined value; current cut-off means (13-17) for controlling said switching means by the output of said abnormality detection means (30, 50) and cutting off the current supplied to said field winding (2); and a load (12) connected to said charge lamp on the opposite side to said battery; wherein a current flows through a circuit ranging from said battery (9), said charge lamp (7) and said load (12) when abnormality occurs, and said charge lamp (7) is lit to raise the alarm of abnormality.
Claim 8
Dependent Claim
68 words
The voltage regulator for a charging generator as defined in claim 5 wherein said abnormality detection means includes a differential amplifier (30) detecting the difference between the output voltage (V L ) of said auxiliary rectification means (5) and the battery voltage (V s ) and a comparator (19) generating the output thereof when the output voltage of said differential amplifier (30) is greater than a set voltage.
Claim 9
Dependent Claim
34 words
The voltage regulator for a charging generator as defined in claim 5 which further includes a holding circuit (17) for holding the output of said abnormality detection means until said holding circuit is reset.
References Cited (Backward Citations)
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