US6462517B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulator of vehicle AC generator
Assignee: Denso Corp
•
Filing: 2001-08-07
•
Granted: 2002-10-08
•
Expires: 2021-08-07
Abstract
Abstract A voltage regulator of a vehicle AC generator includes a switching element connected between a battery and a field coil, a control circuit for controlling the switching element according to battery voltage, a power circuit for supplying the control circuit with a constant voltage and a reverse-current blocking diode having an anode connected through an outside power line to the battery and a cathode connected to the power circuit. Even if a large negative surge voltage is generated in a power line connected to a battery, and applied to the power circuit, the output voltage, i.e. V DD , does not widely fluctuate, so that devices included in the voltage regulator, such as a comparator or an oscillator, can operate properly.
Inventors
- 👤 Tadatoshi Asada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:57
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155; H02M7/1555; H02J; H02J7/00; H02J7/14; H02J7/16; H02J2207/00; H02J2207/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
102 words
A voltage regulator of a vehicle AC generator having a field coil for charging a battery, said voltage regulator comprising: a switching element connected between said battery and said field coil; a control circuit for controlling said switching element according to terminal voltage of said battery; a power circuit having a high-side input terminal, said power circuit providing a constant voltage from power supplied to said high-side terminal and supplying said control circuit with said constant voltage; and a reverse-current blocking diode having an anode connected through an outside power line to said battery and a cathode connected to said high-side terminal.
Claim 2
Dependent Claim
102 words
A voltage regulator of a vehicle AC generator having a field coil for charging a battery, said voltage regulator comprising: a switching element connected between said battery and said field coil; a control circuit for controlling said switching element according to terminal voltage of said battery; a power circuit having a high-side input terminal, said power circuit providing a constant voltage from power supplied to said high-side terminal and supplying said control circuit with said constant voltage; and a reverse-current blocking diode having an anode connected through an outside power line to said battery and a cathode connected to said high-side terminal.
Claim 3
Dependent Claim
37 words
The voltage regulator as claimed in claim 1 , wherein at least a portion of said control circuit, said power circuit and said reverse-current blocking diode are integrated into an IC chip and separated by insulation layers.
Claim 4
Dependent Claim
48 words
The voltage regulator as claimed in claim 1 , wherein at least a portion of said control circuit and said power circuit are integrated into an IC chip and separated by insulation layers, and said reverse-current blocking diode is formed at a portion separate from said IC chip.
Claim 5
Dependent Claim
31 words
The voltage regulator as claimed in claim 3 , wherein said IC chip and said portion at which said reverse-current blocking diode is formed are disposed in a hybrid IC unit.
Claim 6
Dependent Claim
50 words
The voltage regulator as claimed in claim 1 , wherein said reverse-current blocking diode is fixed to a first conductive support plate and said power circuit is fixed to a second conductive support plate, and said first and second conductive support plates are thermally and electrically insulated from each other.
Claim 7
Dependent Claim
65 words
The voltage regulator as claimed in claim 5 , wherein each of said first and second support plates comprises one of leads of a lead frame, said reverse-current blocking diode has a cathode electrode connected to said high-side said input terminal of said power circuit by a bonding wire, and said reverse-current blocking diode, said power circuit and said bonding wire are molded with resin.
Claim 8
Dependent Claim
28 words
The voltage regulator as claimed in claim 6 , wherein each of said reverse-current blocking diode and said power circuit is separately fixed to one of said leads.
References Cited (Backward Citations)
US4361796A
Cited
US4583036A
Cited
JPS6377333A
Cited
JPS6455021A
Cited
US4831322A
Cited
US4985670A
Cited
JPH02276500A
Cited
US5994787A
Cited
US6060866A
Cited
US6344734B1
Cited
US6271649B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-10-07 | 2006-04-08 | 2006-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-10-07 | 2010-04-08 | 2010-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-10-07 | 2014-04-08 | 2014-10-08 | $7700.00 | Window Closed / Lapsed |