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US6683389B2
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Hybrid electric vehicle DC power generation system
Assignee: Capstone Green Energy Corp
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Filing: 2001-08-23
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Granted: 2004-01-27
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Expires: 2021-08-23
Abstract
Abstract A hybrid electric vehicle, such as a bus or delivery vehicle, includes batteries and a turbogenerator/motor connected through a double conversion control system. The batteries and the turbogenerator/motor are each connected to a DC bus through bi-directional power converters operating as customized bi-directional switching converters configured, under the control of a power controller, to provide an interface between the DC bus and the batteries and turbogenerator/motor, respectively.
Inventors
- 👤 Everett R. Geis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:57
CPC Classifications
B; B60; B60K; B60K6/00; B60K6/20; B60K6/22; B60K6/28; B60L; B60L50/00; B60L50/50; B60L50/60; B60L50/61; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/62; Y02T10/70; Y02T10/7072; Y10; Y10S; Y10S903/00; Y10S903/902; Y10S903/903; Y10S903/904; Y10S903/907
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
A hybrid electric vehicle power generation system, comprising: a turbo generator/motor; a DC bus; a first power converter connecting said turbogenerator/motor and said DC bus, said first power converter serving as an AC to DC convertor when power is supplied from said turbogenerator/motor to said DC bus and as a DC to AC convertor when power is supplied from said DC bus to said turbogenerator/motor; an energy storage device; a second power converter connecting said energy storage device and said DC bus, said second power converter transferring power between said DC bus and said energy storage device; said first and second power converters together serving to regulate DC bus voltage to a desired voltage independent of turbogenerator/motor speed.
Claim 2
Dependent Claim
118 words
A hybrid electric vehicle power generation system, comprising: a turbo generator/motor; a DC bus; a first power converter connecting said turbogenerator/motor and said DC bus, said first power converter serving as an AC to DC convertor when power is supplied from said turbogenerator/motor to said DC bus and as a DC to AC convertor when power is supplied from said DC bus to said turbogenerator/motor; an energy storage device; a second power converter connecting said energy storage device and said DC bus, said second power converter transferring power between said DC bus and said energy storage device; said first and second power converters together serving to regulate DC bus voltage to a desired voltage independent of turbogenerator/motor speed.
Claim 3
Dependent Claim
13 words
The system of claim 1 wherein said turbogenerator/motor includes a permanent magnet rotor.
Claim 4
Dependent Claim
31 words
The system of claim 1 , further comprising: a resistive load connected across said DC bus to dissipate power from said DC bus whenever DC bus voltage exceeds the desired voltage.
Claim 5
Dependent Claim
13 words
The system of claim 1 wherein said energy storage device is a battery.
Claim 6
Dependent Claim
13 words
The system of claim 1 wherein said energy storage device is a flywheel.
Claim 7
Dependent Claim
13 words
The system of claim 1 wherein said energy storage device is an ultracapacitor.
Claim 8
Dependent Claim
166 words
A hybrid electric vehicle power generation system, comprising: a DC bus; a permanent magnet turbogenerator/motor; a battery; a power controller that regulates DC bus voltage to a desired voltage independent of permanent magnet turbogenerator/motor speed, said power controller having a first power converter, connecting said permanent magnet turbogenerator/motor and said DC bus, that serves as an AC to DC convertor when power is supplied from said permanent magnet turbogenerator/motor to said DC bus and as a DC to AC convertor when power is supplied from said DC bus to said permanent magnet turbogenerator/motor, a second power converter, connecting said battery and said DC bus, that serves as a DC to DC converter when power is supplied from said DC bus to said battery and as a reverse DC to DC converter when power is supplied from said battery to said DC bus; and a resistive load connected across said DC bus to dissipate power from said DC bus whenever DC bus voltage exceeds the desired voltage.
Claim 9
Dependent Claim
166 words
A hybrid electric vehicle power generation system, comprising: a DC bus; a permanent magnet turbogenerator/motor; a battery; a power controller that regulates DC bus voltage to a desired voltage independent of permanent magnet turbogenerator/motor speed, said power controller having a first power converter, connecting said permanent magnet turbogenerator/motor and said DC bus, that serves as an AC to DC convertor when power is supplied from said permanent magnet turbogenerator/motor to said DC bus and as a DC to AC convertor when power is supplied from said DC bus to said permanent magnet turbogenerator/motor, a second power converter, connecting said battery and said DC bus, that serves as a DC to DC converter when power is supplied from said DC bus to said battery and as a reverse DC to DC converter when power is supplied from said battery to said DC bus; and a resistive load connected across said DC bus to dissipate power from said DC bus whenever DC bus voltage exceeds the desired voltage.
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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) | 2007-01-26 | 2007-07-28 | 2008-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-01-26 | 2011-07-28 | 2012-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-01-26 | 2015-07-28 | 2016-01-27 | $7700.00 | Window Closed / Lapsed |