Apparatus and method for estimating initial position of rotor of motor
US10439536B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 2017 |
| Grant date | Oct 8, 2019 |
| Priority date | — |
| Expiry date | Dec 27, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2203/11
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An initial position estimating apparatus for estimating an initial position of a rotor of a motor includes: a signal processor for outputting an angular error component from a change amount of a q-axis current in an estimated rotor reference frame; a position estimator for estimating an electrical position of the rotor from the angular error component; a magnetic pole determination portion for outputting magnetic pole determination information according to a sign of a magnetic pole determination signal determined based on a change amount of a d-axis current in the estimated rotor reference frame and based on a d-axis voltage; and a first addition portion for outputting an initial position of the rotor by adding the magnetic pole determination information to the electrical position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.