Patent US6462517B2 successfully refreshed from Google Patents.
US6462517B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulator of vehicle AC generator
Assignee: Denso Corp
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Filing: 2001-08-07
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Granted: 2002-10-08
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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 06:05
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.
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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 |