Permanent magnet machine fault protection
US12081015B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2022 |
| Grant date | Sep 3, 2024 |
| Priority date | — |
| Expiry date | Nov 24, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2207/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system includes a permanent magnet (PM) machine including a first phase winding and a second phase winding and a permanent magnet configured to rotate relative to the first and second phase windings. The first phase winding has a main leg and a return leg extending from the first phase winding. The second phase winding has a main leg and a return leg extending from the second phase winding. A return switch unit is operatively connected to the return legs of the first phase winding and the second phase winding. The return switch unit includes a switch configured to connect the return legs of the first phase and second phase to a neutral node in the return switch unit in a normal state, and to disconnect the return legs of the first and second phase windings from the neutral node in a fault protection state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.