Method and system controlling an electrical motor with temperature compensation
US8547045B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2011 |
| Grant date | Oct 1, 2013 |
| Priority date | — |
| Expiry date | Feb 1, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P29/662
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A temperature estimation module estimates a change in temperature of the magnets associated with the rotor of the motor based on an operational magnetic flux strength that is compared to a reference magnetic flux strength determined at a known ambient temperature and for a predetermined operating range of the motor The temperature estimation module or the system establishes a relationship between the estimated change in the temperature and a magnetic torque component of a target output torque of the motor consistent with the predetermined operating range. The current adjustment module or the system adjusts a command (e.g., quadrature-axis current command) for the motor to compensate for shaft torque variation associated with the estimated change in the temperature in conformance with the established relationship.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.