EP0430208A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Charging control apparatus for vehicle generators
Assignee: OFFERTA DI LICENZA AL PUBBLICO;PUBBLICO
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Filing: 1990-11-28
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Granted: —
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Expires: 2010-11-28
Abstract
Abstract A battery charging control apparatus for a vehicle generator comprises switching means (39) for controlling a field current flowing through a field winding (13) of the generator intermittently, voltage control means (31) for controlling the switching means (39) to increase the field current gradually in order to maintain a voltage of a battery to be charged at a first predetermined value (V R1 ) when the battery voltage drops below the first predetermined value (V R1 ), generator output voltage detecting means (40) for detecting an output voltage of the generator, charging abnormality warning means (46, 47, 48), which detects occurrence of charging abnormality, when the detected generator output voltage drops to assume a second predetermined value (V R2 ) and below, which value (V R2 ) is lower than the first predetermined value (V R1 ), and at the same time the battery voltage remains at the first predetermined value (V R1 ) and below for a predetermined time, and which then turns on a charging abnormality warning lamp (7), and current increasing means (31, 35, 38, 50) which increases the field current to thereby increase the generator output voltage to assume the second predetermined value (V R2 ) and above within the predetermined time, when the charging abnormality has occurred, whereby it is made possible to prevent erroneous lighting of the charging abnormality warning lamp (7).
Inventors
- 👤 Nobuo Mayumi
- 👤 Tomomi Tsuzuki
- 👤 Kouzi Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 08:24
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/80; H02J7/82; H02J7/14; H02J7/16; H02J7/24; H02J7/2434; Y; Y02; Y02T; Y02T10/00; Y02T10/80; Y02T10/92
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
279 words
A charging control apparatus for vehicle generators comprising: a vehicle generator having a stator winding (11) and a field winding (13) and driven by an engine to generate an output voltage for charging a battery (2); switching means (39) connected to said field winding (13) and controlling a current flowing through said field winding (13); voltage control means (31) which maintains a voltage of said battery (2) at a first predetermined value (V R1 ) by controlling said switching means (39) to increase the current flowing through said field winding (13) gradually when the battery voltage drops to be lower than the first predetermined value (V R1 ); generator output voltage detecting means (40) which detects an output voltage of said generator; charging abnormality warning means (46, 47, 48) which detects occurrence of charging abnormality and informs an operator of the occurrence of charging abnormality when the generator output voltage detected by said generator output voltage detecting means (40) assumes a second predetermined value (V R2 ) and below which has been set to be lower than the first predetermined value (V R1 ) and a state that the battery voltage assumes the first predetermined value (V R1 ) and below continues for a predetermined time; and current increasing means (31, 35, 38, 50) which increases the current flowing through said field winding (13) to thereby increase the generator output voltage to reach the second predetermined value (V R2 ) and above within said predetermined time when the generator output voltage drops to assume the second predetermined value (V R2 ) and below and the battery voltage drops to assume the first predetermined value (V R1 ) and below.
Claim 2
Dependent Claim
359 words
A charging control apparatus for vehicle generators comprising: a vehicle generator having a stator winding (11) and a field winding (13) and driven by an engine to generate an output voltage for charging a battery (2); switching means (39) connected to said field winding (13) and controlling a current flowing through said field winding (13); voltage control means (31) which detects a voltage of said battery (2), outputs a control signal for maintaining the battery voltage at a first predetermined value (V R1 ), and performs ON/OFF control of said switching means (39) to thereby control the current flowing through said field winding (13); gradual excitation means (32, 33, 34, 35) which outputs a control signal for increasing the current flowing through said field winding (13) gradually to thereby control said switching means (39) in place of said voltage control means (31) when the battery voltage drops to assume the first predetermined value (V R1 ) and below; generator output voltage detecting means (40) which detects an output voltage of said generator; charging abnormality warning means (46, 47, 48) which detects occurrence of charging abnormality and informs an operator of the occurrence of charging abnormality when the generator output voltage detected by said generator output voltage detecting means (40) assumes a second predetermined value (V R2 ) and below which has been set to be lower than the first predetermined value (V R1 ) and a state that the battery voltage assumes the first predetermined value (V R1 ) and below continues for a predetermined time; and change-over means (60) which increases the current flowing through said field winding (13) to thereby increase the generator output voltage to reach the second predetermined value (V R2 ) and above within the predetermined time by controlling said switching means (39) by the use of the control signal of said voltage control means (31) in place of the control signal of said gradual excitation means (32, 33, 34, 35) when the generator output voltage drops to assume the second predetermined value (V R2 ) and below and the battery voltage drops to assume the first predetermined value (V R1 ) and below.
Claim 3
Dependent Claim
70 words
A charging control apparatus for vehicle generators according to Claim 2, characterized in that said change-over means (60) performs a change-over operation to control said switching means (39) by the use of the control signal of said gradual excitation means (32, 33, 34, 35) after the output voltage of said generator reaches a third predetermined value (V R3 ) which is higher than the second predetermined value (V R2 ).
Claim 4
Dependent Claim
77 words
A charging control apparatus for vehicle generators according to Claim 2, characterized in that said change-over means (60) performs a change-over operation to control said switching means (39) by the use of the control signal of said voltage control means (31) in place of the control signal of said gradual excitation means (32, 33, 34, 35) for a predetermined time when the output voltage of said generator drops to assume the second predetermined value (V R2 ).
Claim 5
Dependent Claim
340 words
A charging control apparatus for vehicle generators comprising: a vehicle generator having a stator winding (11) and a field winding (13) and driven by an engine to generate an output voltage for charging a battery (2); switching means (39) connected to said field winding (13) and controlling a current flowing through said field winding (13); voltage control means (31) which detects a voltage of said battery (2), outputs a control signal for maintaining the battery voltage at a first predetermined value (V R1 ), and performs ON/OFF control of said switching means (39) to thereby control the current flowing through said field winding (13); gradual excitation means (32, 33, 34, 35) which outputs a control signal for increasing the current flowing through said field winding (13) gradually to thereby control said switching means (39) in place of said voltage control means (31) when the battery voltage drops to assume the first predetermined value (V R1 ) and below; generator output voltage detecting means (40) which detects an output voltage of said generator; charging abnormality warning means (46, 47, 48) which detects occurrence of charging abnormality and informs an operator of the occurrence of charging abnormality when the generator output voltage detected by said generator output voltage detecting means (40) assumes a second predetermined value (V R2 ) and below which has been set to be lower than the first predetermined value (V R1 ) and a state that the battery voltage assumes the first predetermined value (V R1 ) and below continues for a predetermined time; and change-over means (60) which performs a change-over operation so that said switching means (39) may be controlled by the use of the control signal of said voltage control means (31) in place of the control signal of said gradual excitation means (32, 33, 34, 35) when the generator output voltage drops to assume a third predetermined value (V R3 ) and below which is higher than said second predetermined value (V R2 ) but lower than the first predetermined value (V R1 ).
Claim 6
Dependent Claim
241 words
A charging control apparatus for vehicle generators comprising: a vehicle generator having a stator winding (11) and a field winding (13) and driven by an engine to generate an output voltage for charging a battery (2); switching means (39) connected to said field winding (13) and controlling a current flowing through said field winding (13); voltage control means (31) which generates a control signal for controlling the operation of said switching means (39) to increase the current flowing through said field winding (13) gradually to thereby maintain the battery voltage at the first predetermined value (V R1 ) when the battery voltage drops to assume the first predetermined value (V R1 ) and below; generator output voltage detecting means (40) which detects an output voltage of said generator; charging abnormality warning means (46, 47, 48) which detects occurrence of charging abnormality and informs an operator of the occurrence of charging abnormality when the generator output voltage detected by said generator output voltage detecting means (40) assumes a second predetermined value (V R2 ) and below which has been set to be lower than the first predetermined value (V R1 ) and a state that the batter voltage assumes the first predetermined value (V R1 ) and below continues for a predetermined time; and inhibiting means (80) which inhibits the operation of said charging abnormality warning means (46, 47, 48) while the control signal of said voltage control means (31) is outputted.
References Cited (Backward Citations)
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