Vector control of an induction motor
US6956352B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2002 |
| Grant date | Oct 18, 2005 |
| Priority date | — |
| Expiry date | Aug 15, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a method in connection with an inverter, the inverter comprising a direct voltage intermediate circuit, an optimum switching table and output power switches. The method comprises steps where phase currents (iA, iC) of the inverter are converted to a synchronous dq coordinate system in order to achieve vector components (id, iq), the synchronous current vector components (id, iq) are low pass filtered in order to achieve current vector components (id,jpf, iq,jpf), a current reference (iq,ref) is generated in the direction of the q axis, a current reference (id,ref) is generated, a torque reference (te,ref) is generated, an absolute value reference (|ψ|ref) of a flux linkage is generated from the currents and switching commands are formed on the basis of the torque reference (te,ref) and the flux reference (|ψ|ref) using the optimum switching table (5).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.