Temperature compensation for improved field weakening accuracy
US8519648B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2011 |
| Grant date | Aug 27, 2013 |
| Priority date | — |
| Expiry date | Mar 27, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P29/662
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus are provided for rotor and stator temperature compensation for field weakening current. The method comprises generating a phase voltage feed back signal Vph based in part on pre-defined optimal current commands (ID* and IQ*) received by the IPM, generating a phase voltage command (Vphcmd) based in part on a temperature of a magnetic rotor and stator of the IPM, and generating a phase voltage error (Verror) by subtracting the phase voltage feed back signal (Vph) from the phase voltage command (Vphcmd). The method further comprises generating a d-axis command current correction value (ΔId) and a q-axis command current correction value (ΔIq) from the phase voltage error (Verror); and adjusting the pre-defined optimal current commands (ID* and IQ*) by the d-axis and the q-axis command current correction values (ΔId and ΔIq).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.