Control apparatus and control method for electric rotating machine
US8610388B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2009 |
| Grant date | Dec 17, 2013 |
| Priority date | — |
| Expiry date | Mar 1, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A controller outputting voltage instructions for drive control of an electric rotating machine adds, by using adders, position estimation voltage instructions for estimating the rotor position generated by a position estimation voltage generator, to drive voltage instructions, and outputs the resultant signals as voltage instructions. A position estimation device includes current extractors for extracting position estimation currents having the same frequency components as that of the position estimation voltage instructions, from electric rotating machine currents detected by a current detector, a position estimation current amplitude calculation section for calculating position estimation current amplitudes from the position estimation currents; and an estimation position calculation unit for calculating an estimated position of the electric rotating machine, based on the position estimation current amplitudes. The position estimation current amplitude calculation section calculates the position estimation current amplitudes, based on an autocorrelation obtained by squaring the position estimation currents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.