US3668504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery charging voltage regulator including safety circuit
Assignee: Denso Corp
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Filing: 1970-10-26
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Granted: 1972-06-06
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Expires: 1990-10-26
Abstract
Abstract A charging voltage regulator for a storage battery, in which, an output voltage of a charging generator is controlled to maintain the terminal voltage of a storage battery at a predetermined value by interrupting the field current of the generator using a transistor circuit, and especially if such accidents as electrical disconnections between the transistor circuit and the storage battery occur, all disasters caused by an extraordinary high voltage between terminals of the charging generator resulting from the occurrence of such accidents may be eliminated, so that the charging generator operates in the same manner as in the case where the connecting condition of the circuit is normal.
Inventors
- 👤 Yoshichi Kawashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:54
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; H02J7/16; H02J7/60; H02J7/61; H02J7/80; Y; Y10; Y10S; Y10S320/00; Y10S320/13
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
169 words
A charging voltage regulator for use with a storage battery having two terminals, said regulator comprising: dynamo electric generating means having an output terminal operatively connected to one of said battery terminals for charging said battery at a rate related to an exciting current supplied to a field coil of said dynamo, voltage dividing means operatively connected at one end thereof to said one terminal of said battery for sensing the terminal voltage thereof and for providing a proportional voltage at a voltage dividing point, transistor means having an output connected to the field coil of said dynamo and an input connected to said voltage dividing point for controlling said exciting current in relation to an input signal voltage obtained from said dividing point, and a plurality of diodes operatively connected between the said output terminal of the dynamo and the said one end of said voltage dividing means for providing a control input signal to said transistor means even under adverse circuit conditions thereby preventing excessive dynamo excitation.
Claim 2
Dependent Claim
169 words
A charging voltage regulator for use with a storage battery having two terminals, said regulator comprising: dynamo electric generating means having an output terminal operatively connected to one of said battery terminals for charging said battery at a rate related to an exciting current supplied to a field coil of said dynamo, voltage dividing means operatively connected at one end thereof to said one terminal of said battery for sensing the terminal voltage thereof and for providing a proportional voltage at a voltage dividing point, transistor means having an output connected to the field coil of said dynamo and an input connected to said voltage dividing point for controlling said exciting current in relation to an input signal voltage obtained from said dividing point, and a plurality of diodes operatively connected between the said output terminal of the dynamo and the said one end of said voltage dividing means for providing a control input signal to said transistor means even under adverse circuit conditions thereby preventing excessive dynamo excitation.
Claim 3
Dependent Claim
31 words
A voltage regulator as in claim 1 wherein said plurality of diodes includes at least one Zener diode connected with opposite sense as compared to others of said plurality of diodes.
Claim 4
Dependent Claim
38 words
A voltage regulator as in claim 1 wherein said operative connection between said voltage dividing means and said battery comprises: a series connected diode to prevent the flow of reverse current through said operative connection to said battery.
Claim 5
Dependent Claim
47 words
A voltage regulator as in claim 1 wherein said operative connection between said voltage dividing means and said battery comprises: a series connected resistor to provide an auxiliary charging circuit for carrying a limited charging current under adverse circuit conditions when the normal charging circuit is interrupted.
Claim 6
Dependent Claim
17 words
A voltage regulator as in claim 1 wherein said dynamo electric generating means comprises a DC generator.
Claim 7
Dependent Claim
22 words
A voltage regulator as in claim 1 wherein said dynamo electric generating means comprises an AC alternator and rectifying means connected thereto.
Claim 8
Dependent Claim
134 words
A charging voltage regulator for use with a storage battery, said regulator comprising: dynamo electric generating means for charging said battery at a rate related to an exciting current supplied to a field coil of said dynamo, voltage dividing means operatively connected to said battery for sensing the terminal voltage thereof and providing a proportional voltage at a voltage dividing point, transistor means connected to said dynamo and to said voltage dividing point for controlling said exciting current in relatioN to an input signal voltage at said dividing point, and circuit means for providing a control signal to said transistor means over a plurality of paths connected between said dynamo and one end of said voltage dividing means, wherein said transistor means is operative even under adverse circuit conditions thereby preventing excessive dynamo excitation.
Claim 9
Dependent Claim
134 words
A charging voltage regulator for use with a storage battery, said regulator comprising: dynamo electric generating means for charging said battery at a rate related to an exciting current supplied to a field coil of said dynamo, voltage dividing means operatively connected to said battery for sensing the terminal voltage thereof and providing a proportional voltage at a voltage dividing point, transistor means connected to said dynamo and to said voltage dividing point for controlling said exciting current in relatioN to an input signal voltage at said dividing point, and circuit means for providing a control signal to said transistor means over a plurality of paths connected between said dynamo and one end of said voltage dividing means, wherein said transistor means is operative even under adverse circuit conditions thereby preventing excessive dynamo excitation.
Claim 10
Dependent Claim
35 words
A voltage regulator as in claim 7 wherein said circuit means comprises a plurality of diodes including at least one Zener diode connected with opposite sense as compared to others of said plurality of diodes.
Claim 11
Dependent Claim
38 words
A voltage regulator as in claim 7 wherein said operative connection between said voltage dividing means and said battery comprises: a series connected diode to prevent the flow of reverse current through said operative connection to said battery.
Claim 12
Dependent Claim
17 words
A voltage regulator as in claim 7 wherein said dynamo electric generating means comprises a DC generator.
Claim 13
Dependent Claim
143 words
A voltage-regulated charging apparatus for use with a storage battery, said apparatus comprising: an AC generator, a rectifying means connected between said generator and said battery, an auxiliary rectifying means connected to said generator, an indicator lamp connected between said auxiliary rectifying means and said battery, transistor means connected in series with the field winding of said generator, the series connection of said transistor means and the field winding being connected to said auxiliary rectifying means, a voltage dividing means connected to said auxiliary rectifying means through a plurality of diodes, the voltage dividing point of said voltage dividing means being coupled to said transistor means for controlling the conductivity of said transistor means in relation to the voltage at said voltage dividing point, and a resistor connected between the junction of said dividing means and said plurality of diodes and the battery.
Claim 14
Dependent Claim
143 words
A voltage-regulated charging apparatus for use with a storage battery, said apparatus comprising: an AC generator, a rectifying means connected between said generator and said battery, an auxiliary rectifying means connected to said generator, an indicator lamp connected between said auxiliary rectifying means and said battery, transistor means connected in series with the field winding of said generator, the series connection of said transistor means and the field winding being connected to said auxiliary rectifying means, a voltage dividing means connected to said auxiliary rectifying means through a plurality of diodes, the voltage dividing point of said voltage dividing means being coupled to said transistor means for controlling the conductivity of said transistor means in relation to the voltage at said voltage dividing point, and a resistor connected between the junction of said dividing means and said plurality of diodes and the battery.
Claim 15
Dependent Claim
123 words
An improvement for use with a voltage-regulated dynamo charging apparatus for a storage battery wherein a voltage dividing means is used to sense the terminal voltage of said battery with the voltage at the dividing point of said dividing means being used to control a means for regulating the dynamo output and wherein a plurality of diodes are connected to said voltage dividing means for conducting current from said dynamo to said means for regulating under adverse circuit conditions, the improvement comprising: a resistor connected between the junction of said dividing means and said plurality of diodes and the battery to provide an auxiliary charging circuit for carrying a limited charging current under adverse circuit conditions when the normal charging circuit is interrupted.
Claim 16
Dependent Claim
123 words
An improvement for use with a voltage-regulated dynamo charging apparatus for a storage battery wherein a voltage dividing means is used to sense the terminal voltage of said battery with the voltage at the dividing point of said dividing means being used to control a means for regulating the dynamo output and wherein a plurality of diodes are connected to said voltage dividing means for conducting current from said dynamo to said means for regulating under adverse circuit conditions, the improvement comprising: a resistor connected between the junction of said dividing means and said plurality of diodes and the battery to provide an auxiliary charging circuit for carrying a limited charging current under adverse circuit conditions when the normal charging circuit is interrupted.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |