Control apparatus and control method for rotating electrical machine
US10998838B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2017 |
| Grant date | May 4, 2021 |
| Priority date | — |
| Expiry date | May 11, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotor position judging unit detects a rotor position by utilizing induced voltages generated at respective phases of an armature winding. While a field current flowing through a field winding rises toward a target value (while the field current temporally changes), induced voltages are generated at the respective phases of the armature winding by temporal differentiation of a magnetic flux which interlinks with the armature winding. The rotor position judging unit detects the rotor position (d-axis of a rotor) on a basis of a table containing combination of amplitude ratios and polarities of the induced voltages generated at the respective phases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.