US6047787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage control method for an electric motor control system
Assignee: Aumovio Systems Inc
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Filing: 1998-02-03
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Granted: 2000-04-11
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Expires: 2018-02-03
Abstract
Abstract A method for controlling regenerative energy in a system having an motor and having a power converter for converting regenerative energy from the motor for supply as electrical current to a receiving apparatus includes estimating a resistance to electrical current flow between the electrical power converter and the receiving apparatus and measuring a first voltage at the receiving apparatus. The method further comprises controlling a regenerative current from the power converter to the receiving apparatus in view of the resistance and the first voltage to limit a second voltage at the power converter.
Inventors
- 👤 Doug D. Deng
- 👤 Christos Aristotles Kambouris
- 👤 Kent Michael Harmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:59
CPC Classifications
B; B60; B60L; B60L7/00; B60L7/10; B60L7/16; B60L3/00; B60L3/0023
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
89 words
A method for controlling regenerative energy in an electrically-propelled vehicle having a motor and having a power converter for converting regenerative energy from said motor for supply to a battery, said method comprising the steps of: (a) estimating a resistance to electrical current flow between said electrical power converter and said battery; (b) measuring a terminal voltage of said battery; (c) controlling a regenerative current from said power converter to said battery in view of said resistance and said terminal voltage to limit a voltage at said power converter.
Claim 2
Independent Claim
89 words
A method for controlling regenerative energy in an electrically-propelled vehicle having a motor and having a power converter for converting regenerative energy from said motor for supply to a battery, said method comprising the steps of: (a) estimating a resistance to electrical current flow between said electrical power converter and said battery; (b) measuring a terminal voltage of said battery; (c) controlling a regenerative current from said power converter to said battery in view of said resistance and said terminal voltage to limit a voltage at said power converter.
Claim 3
Dependent Claim
100 words
A method as recited in claim 1, wherein estimating a resistance to electrical current flow further comprises: measuring a voltage V 1 at said power converter at a first time; measuring a current I 1 between said power converter and said battery at said first time; measuring a voltage V 2 at said power converter at a second time; measuring a current I 2 between said power converter and said battery at said second time; and calculating said resistance as a difference between V 2 and V 1 , divided by a difference between I 2 and I 1 .
Claim 4
Dependent Claim
48 words
A method as recited in claim 2, wherein estimating a resistance further comprises employing an initial resistance estimate at an initial time, said initial estimate representing a nominal internal resistance of said battery as a function of a state of charge of said battery at said initial time.
Claim 5
Dependent Claim
46 words
A method as recited in claim 2, wherein estimating a resistance further comprises employing an initial resistance estimate at an initial time, said initial estimate representing a nominal internal resistance of said battery as a function of a temperature of said battery at said initial time.
Claim 6
Dependent Claim
51 words
A method as recited in claim 2, wherein estimating a resistance further comprises employing an initial resistance estimate at an initial time, said initial estimate representing a nominal internal resistance of said battery as a function of a state of charge and a temperature of said battery at said initial time.
Claim 7
Dependent Claim
32 words
A method as recited in claim 1, wherein said step of controlling a regenerative current comprises limiting said regenerative current to maintain said voltage at said power converter below a predetermined threshold.
Claim 8
Dependent Claim
32 words
A method as recited in claim 2, wherein said step of controlling a regenerative current comprises limiting said regenerative current to maintain said voltage at said power converter below a predetermined threshold.
Claim 9
Dependent Claim
32 words
A method as recited in claim 5, wherein said step of controlling a regenerative current comprises limiting said regenerative current to maintain said voltage at said power converter below a predetermined threshold.
Claim 10
Independent Claim
96 words
A method for controlling regenerative energy in a system having an motor and having a power converter for converting regenerative energy from said motor for supply as electrical current to a receiving apparatus, said method comprising the steps of: (a) estimating a resistance to electrical current flow between said electrical power converter and said receiving apparatus; (b) measuring a first voltage at said receiving apparatus; (c) controlling a regenerative current from said power converter to said receiving apparatus in view of said resistance and said first voltage to limit a second voltage at said power converter.
Claim 11
Independent Claim
96 words
A method for controlling regenerative energy in a system having an motor and having a power converter for converting regenerative energy from said motor for supply as electrical current to a receiving apparatus, said method comprising the steps of: (a) estimating a resistance to electrical current flow between said electrical power converter and said receiving apparatus; (b) measuring a first voltage at said receiving apparatus; (c) controlling a regenerative current from said power converter to said receiving apparatus in view of said resistance and said first voltage to limit a second voltage at said power converter.
Claim 12
Dependent Claim
102 words
A method as recited in claim 9, wherein estimating a resistance to electrical current flow further comprises: measuring a voltage V 1 at said power converter at a first time; measuring a current I 1 between said power converter and said receiving apparatus at said first time; measuring a voltage V 2 at said power converter at a second time; measuring a current I 2 between said power converter and said receiving apparatus at said second time; and calculating said resistance as a difference between V 2 and V 1 , divided by a difference between I 2 and I 1 .
Claim 13
Dependent Claim
32 words
A method as recited in claim 9, wherein said step of controlling a regenerative current comprises limiting said regenerative current to maintain said voltage at said power converter below a predetermined threshold.
Claim 14
Dependent Claim
32 words
A method as recited in claim 10, wherein said step of controlling a regenerative current comprises limiting said regenerative current to maintain said voltage at said power converter below a predetermined threshold.
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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) | 2003-04-11 | 2003-10-11 | 2004-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-04-11 | 2007-10-11 | 2008-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-04-11 | 2011-10-11 | 2012-04-11 | $7700.00 | Window Closed / Lapsed |