Parallel inverter systems and methods
US-2024014751-A1 · Jan 11, 2024 · US
Thermal stress reduction in aircraft motor controllers
US9435264B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9435264-B2 |
| Application number | US-201414282312-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 20, 2014 |
| Priority date | Apr 20, 2012 |
| Publication date | Sep 6, 2016 |
| Grant date | Sep 6, 2016 |
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Abstract
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A thermal stress reduction method includes ramping an electric power generator to start an aircraft engine, for a time period associated with the aircraft engine start sequence toggling a three-level inverter switch array to a three-level pulse width modulation mode, determining if a first time interval in the three-level pulse width modulation mode exceeded a predetermined three-level pulse width modulation mode interval, in response to the first time interval exceeding the three-level pulse width modulation mode interval, toggling the three-level inverter switch array to a two-level pulse width modulation mode, determining if a second time interval in the two-level pulse width modulation mode exceeded a predetermined two-level pulse width modulation mode interval and in response to the second time interval exceeding the two-level pulse width modulation mode interval, toggling the three-level inverter switch array to the three-level pulse width modulation mode.
First claim
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The invention claimed is: 1. A thermal stress reduction method for an aircraft motor controller having a three-level inverter switch array, and configured to control an electric power generator coupled to an aircraft engine during an aircraft engine start sequence, the method comprising: ramping the electric power generator to start the aircraft engine; and for a time period associated with the aircraft engine start sequence, ramping an output frequency of the motor controller from…
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- What does patent US9435264B2 cover?
- A thermal stress reduction method includes ramping an electric power generator to start an aircraft engine, for a time period associated with the aircraft engine start sequence toggling a three-level inverter switch array to a three-level pulse width modulation mode, determining if a first time interval in the three-level pulse width modulation mode exceeded a predetermined three-level pulse wi…
- Who is the assignee on this patent?
- Hamilton Sundstrand Corp
- What technology area does this patent fall under?
- Primary CPC classification H02M7/487. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 06 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). 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).