Mechanism of interior permanent magnet machine initial position detection
US9175984B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2012 |
| Grant date | Nov 3, 2015 |
| Priority date | — |
| Expiry date | Jul 30, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/245
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for determining an initial rotor position of an interior permanent magnet (IPM) machine having a rotor and a stator is provided. The system may include a drive circuit in operative and electrical communication with each phase of the IPM machine, and a controller in electrical communication with the drive circuit. The controller may be configured to engage the drive circuit to selectively apply a voltage signal to each phase of the stator of the IPM machine, detect a current signal through each phase corresponding to the applied voltage signal, and calculate the initial rotor position based on a least squares analysis between at least the voltage signal, the current signal and a predefined inductance of the IPM machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.