Electric motor stator winding temperature estimation systems and methods
US8421391B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 2010 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | Jul 4, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P29/64
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric motor system includes an electric motor comprising a stator with windings and a rotor configured to operate at a motor speed; a cooling system comprising coolant configured to cool the rotor and the stator, the coolant having a coolant flow rate and a coolant temperature; an inverter module coupled to the electric motor and configured to provide current to the windings based on inverter control signals; a current regulated torque controller coupled to the inverter module and configured to generate the inverter control signals in response to a derated torque command; and a temperature estimation controller coupled to the current regulated torque controller and configured to generate the derated torque command based on an initial torque command and an estimated stator winding temperature. The temperature estimation controller is configured to estimate the estimated stator winding temperature based on the motor speed and the coolant flow rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.