Minimizing dc-link current ripple and acoustic noise, and reducing DC-link capacitor requirement, for electric motors
US12231070B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2021 |
| Grant date | Feb 18, 2025 |
| Priority date | — |
| Expiry date | Jan 17, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P29/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method performed by a controller of an electric motor, including generating control parameters, the step of generating control parameters selected from: inputting a given reference torque (Tref) and a speed command to a torque generation lookup table (LUT) such that the step of generating the control parameters includes the torque generation lookup table at the given reference torque and the speed command; or utilizing an analytical model that includes one or more analytical equations or one or more functions; inputting the control parameters to a DC-link current ripple, torque ripple, and radial force ripple minimization lookup table; inputting position to the DC-link current ripple, torque ripple, and radial force ripple minimization lookup table; generating a reference current profile from the DC-link current ripple, torque ripple, and radial force ripple minimization lookup table; and inputting the reference current profile to the electric motor. Additional methods are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.