Patents
US 11794872 B2: Electrical power system for a watercraft
- Granted
- 2023-10-24
- Filed
- 2020-12-01 application 17108480
- Type
- Utility · 10 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
An electrical power system for a watercraft including a first electrical power plant configured to operate in a variable frequency mode to output variable frequency power to a first electrical network and a fixed frequency mode to output fixed frequency power to a second electrical network. There is a first electrical load including a first high temperature superconductor (HTS) motor connected to the first electrical network and a second electrical load connected to a second electrical network. A controller selectively connects the first electrical power plant to the first electrical network and operates the first electrical power plant in a variable frequency mode to output variable frequency power to power the first HTS motor and selectively connects the first electrical power plant to the second electrical network and operates the first electrical power plant in a fixed frequency mode to output fixed frequency power to power the second electrical load.
Source: PVGPATDIS, file of 2026-04-10 (ipg231024.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| American Superconductor Corporation 53 patents | US company or organization | Ayer, MA | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| John M. Ulliman | McLean, VA | 2 | PVGPATDIS, file of 2026-04-10 | |
| Timothy MacDonald | North Grafton, MA | 4 | PVGPATDIS, file of 2026-04-10 | |
| Stephen I. Callis | Brandywine, MD | 2 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| B63H | Marine propulsion or steering | B63H21/17 | PVGPATDIS, file of 2026-04-10 |
| B60L | Propulsion of electrically-propelled vehicles ; supplying electric power for auxiliary equipment of electrically-propelled vehicles ; electrodynamic brake systems for vehicles in general ; magnetic suspension or levitation for vehicles; monitoring operating variables of electrically-propelled vehicles; electric safety devices for electrically-propelled vehicles | B60L1/00 | PVGPATDIS, file of 2026-04-10 |
| H02J | Electric power networks; circuit arrangements or systems for supplying or distributing electric power; systems for storing electric energy | H02J3/0073 | PVGPATDIS, file of 2026-04-10 |
| H02K | Dynamo-electric machines | H02K55/04 | PVGPATDIS, file of 2026-04-10 |
| B63J | Auxiliaries on vessels | B63J3/02 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2021-11-30 | Assignment Assignment of assignor's interest | MACDONALD, TIMOTHY signed 2021-11-16 ULLIMAN, JOHN M. signed 2021-11-16 CALLIS, STEPHEN I. signed 2021-11-30 | AMERICAN SUPERCONDUCTOR CORPORATION AYER, MA | 58243/354 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.