Apparatus for controlling permanent-magnet rotary machine
US6984957B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2003 |
| Grant date | Jan 10, 2006 |
| Priority date | — |
| Expiry date | Feb 2, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/64
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
While a rotor 4 of a permanent-magnet rotary machine 1 is rotating and an armature current thereof is substantially zero, a motor controller 2 performs a dq vector control process to control the permanent-magnet rotary machine 1 in a dq coordinate system which has a d-axis representing the direction of a magnetic field of the rotor 4 and a q-axis representing a direction perpendicular to the d-axis, and determines a magnetic pole position correcting quantity θofs to correct a magnetic pole position θact detected by a magnetic pole position detector 8 so that a d-axis voltage command value Vdc determined by the dq vector control process will be substantially zero. The motor controller 2 controls the phases of armature voltages Vuc, Vvc, Vwc with magnetic pole positions corrected by the magnetic pole position correcting quantity θofs. Irrespective of whether the rotary machine 1 is a cylindrical machine or a salient-pole machine, the detected values of magnetic pole positions are appropriately corrected according to a simple process without the need for a voltage detector for thereby efficiently controlling operation of the permanent-magnet rotary machine 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.