Controller for AC rotary machine
US12047026B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2020 |
| Grant date | Jul 23, 2024 |
| Priority date | — |
| Expiry date | Sep 12, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P29/024
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To provide a controller for AC rotary machine which can detect current of the normal phase certainly when the short circuit failure of one phase occurs, in an apparatus that a current sensor is connected in series to the positive electrode side switching device or the negative electrode side switching device of an inverter. A controller for AC rotary machine, when determining that the short circuit failure of any one phase occurred, calculates voltage command values of normal n−1 phases, and changes the voltage command values of the normal n−1 phases so that on period of the detection object device of each phase of the normal n−1 phases become longer than or equal to a length necessary for current detection at least at a current detection timing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.