Axle retention for an electric bicycle
US-2024409183-A1 · Dec 12, 2024 · US
Fuel cell system
US2018019489A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018019489-A1 |
| Application number | US-201715638532-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jun 30, 2017 |
| Priority date | Jul 14, 2016 |
| Publication date | Jan 18, 2018 |
| Grant date | — |
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- Title
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Abstract
Official abstract text for this publication.
There is provided a fuel cell system. This fuel cell system comprises a fuel cell configured to generate electric power using reactive gases; a voltage sensor configured to measure a voltage output from the fuel cell; a converter configured to boost an input voltage that is input from the fuel cell; and a controller configured to control the converter. In the case where the voltage output from the fuel cell to the converter is to be boosted after a changeover of an operating state of the fuel cell system from an intermittent operation to an ordinary operation, when a duty ratio D1 calculated by Mathematical Formula I is greater than a duty ratio D2 calculated by Mathematical Formula II, the controller causes the converter to boost the voltage output from the fuel cell at the duty ratio D2. [ Math . 1 ] D 1 = 1 - Vltrg VH ( I ) where VH (V) denotes a value of output voltage that is output from the converter, and Vltrg (V) denotes an estimated value of voltage that is output from the fuel cell, [ Math . 2 ] D 2 = 1 - ( Vl + Vlmrg ) Vhul ( II ) where Vl (V) denotes a measured value of voltage of the fuel cell by the voltage sensor, Vlmrg (V) denotes a correction amount of the measured value Vl, and Vhul (V) denotes a predetermined upper limit value of the output voltage. This configuration prevents the converter from excessively boosting the actual voltage input from the fuel cell and outputting the excessively boosted voltage.
First claim
Opening claim text (preview).
What is claimed is: 1 . A fuel cell system, comprising: a fuel cell configured to generate electric power using reactive gases; a voltage sensor configured to measure a voltage output from the fuel cell; a converter configured to boost an input voltage that is input from the fuel cell; and a controller configured to control the converter, wherein in a case where the voltage output from the fuel cell to the converter is to be boosted after a changeover of an operating state of the fuel cell system from an intermittent operation to an ordinary operation, when a duty ratio D1 calculated by Mathematical Formula I is greater than a duty ratio D2 calculated by Mathematical Formula II, the controller causes the converter to boost the voltage output from the fuel cell at the duty ratio D2, [ Math . 1 ] D 1 = 1 - Vltrg VH ( I ) where VH (V) denotes a value of output voltage that is output from the converter, and Vltrg (V) denotes an estimated value of voltage that is output from the fuel cell, [ Math . 2 ] D 2 = 1 - ( Vl + Vlmrg ) Vhul ( II ) where Vl (V) denotes a measured value of voltage of the fuel cell by the voltage sensor, Vlmrg (V) denotes a correction amount of the measured value Vl, and Vhul (V) denotes a predetermined upper limit value of the output voltage, and when the duty ratio D1 is equal to or less than the duty ratio D2, the controller causes the converter to boost the voltage output from the fuel cell at the duty ratio D1. 2 . A fuel cell system, comprising: a fuel cell configured to generate electric power using reactive gases; a voltage sensor configured to measure a voltage output from the fuel cell; a converter configured to boost an input voltage that is input from the fuel cell; and a controller configured to control the converter, wherein in a case where the voltage output from the fuel cell to the converter is to be boosted after a changeover of an operating state of the fuel cell system from an intermittent operation to an ordinary operation, when a duty ratio D1 calculated by Mathematical Formula I is greater than a duty ratio D3 calculated by Mathematical Formula III, the controller causes the converter to boost the voltage output from the fuel cell at the duty ratio D3, [ Math . 1 ] D 1 = 1 - Vltrg VH ( I ) where VH (V) denotes a value of output voltage that is output from the converter, and Vltrg (V) denotes an estimated value of voltage that is output from the fuel cell, [ Math . 3 ] D 3 = 1 - Vl Vhul + α ( III ) where Vl (V) denotes a measured value of voltage of the fuel cell by the voltage sensor, Vhul (V) denotes a predetermined upper limit value of the output voltage, and a denot
Assignees
Inventors
Classifications
Fuel cells · CPC title
of gaseous reactants · CPC title
Fuel cells in motive systems, e.g. vehicle, ship, plane · CPC title
of fuel cells with rechargeable batteries · CPC title
- B60L7/18Primary
Controlling the braking effect (B60L7/12, B60L7/14, B60L7/16 take precedence) · CPC title
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Frequently asked questions
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- What does patent US2018019489A1 cover?
- There is provided a fuel cell system. This fuel cell system comprises a fuel cell configured to generate electric power using reactive gases; a voltage sensor configured to measure a voltage output from the fuel cell; a converter configured to boost an input voltage that is input from the fuel cell; and a controller configured to control the converter. In the case where the voltage output from …
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification B60L7/18. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Jan 18 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).