Motor magnetic pole position detecting device
US8120296B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 6, 2009 |
| Grant date | Feb 21, 2012 |
| Priority date | — |
| Expiry date | Jul 23, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor magnetic pole position detecting device includes a detection current command generation unit generating a detection AC current command, a current detection section detecting a current flowing into the motor, a coordinate conversion unit vector-converting the current detected by the current detection section into an excitation component and a torque component both represented by a d-q orthogonal coordinate system based on a phase angle obtained at any rotational frequency, a current control unit delivering a voltage command to current-control the motor based on the detection current command and the current converted by the coordinate conversion unit, an inductance calculation unit calculating motor inductance based on the voltage command and the current converted by the coordinate conversion unit, and a magnetic pole position detection section calculating a frequency and phase of the inductance calculated by the inductance calculation unit, converting the inductance phase into a motor magnetic pole position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.