Rotor flux angle and torque trajectory control apparatus and methods
US9762155B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2016 |
| Grant date | Sep 12, 2017 |
| Priority date | — |
| Expiry date | May 24, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P27/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Low speed and high speed estimates of rotor angle and speed (LS_θ_EST/LS_ω_EST and HS_θ_EST/HS_ω_EST) relative to the stator are received from a low speed estimator and a high speed estimator, respectively. LS_θ_EST and a subset of torque-controlling I_Q trajectory curve (“IQTC”) parameter values appropriate to low speed rotor operation are selected for rotor speeds below a low speed threshold value ω_LOW_THRS. HS_θ_EST and a subset of IQTC curve parameter values appropriate to high speed rotor operation are selected for rotor speeds above a high speed threshold value ω_HIGH_THRS. LS_θ_EST and the low speed subset of IQTC parameter values remain selected for rotor speeds less than ω_HIGH_THRS after accelerating to a rotor speed greater than ω_LOW_THRS. HS_θ_EST and the subset of high speed IQTC parameter values remain selected for rotor speeds greater than ω_LOW_THRS after decelerating to a rotor speed less than ω_HIGH_THRS. Hysteresis in the selection of θ_EST and IQTC parameter values results in smooth acceleration/deceleration control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.