Controller for an axial flux machine and method
US12294318B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2021 |
| Grant date | May 6, 2025 |
| Priority date | — |
| Expiry date | Jul 9, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
We describe a method and controller for controlling an axial flux machine in which an alternating current supplied to the plurality of coils injects a compensation current to reduce a mechanical resonant component of the rotor. The compensation current is a modulated current component added to at least one of the Quadrature Current (Iq) and Direct Current (Id) components (when the alternating current is represented as a vectored DC component), when the rotor is rotating over one or more ranges of rotational speeds. The modulated current component has an electrical frequency that varies over a range of frequencies between a first frequency and a second frequency depending on the rotational speed of the rotor, the range of frequencies including a frequency that is substantially the same as a fundamental mechanical resonant frequency of the rotor, and having a phase that is out of phase with the fundamental mechanical resonant frequency of the rotor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.