Method of operating an electronically commutated motor, and method for carrying out such a method
US7319300B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 2006 |
| Grant date | Jan 15, 2008 |
| Priority date | — |
| Expiry date | Jul 22, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In this method, the value of a temperature-dependent motor parameter (ke) of an electronically commutated motor (124) is determined during motor operation without a temperature sensor. The motor has a stator (201) having stator phases (202, 204, 206), and a permanent-magnet rotor (208) coacting with that stator, which rotor induces voltages (UIND) in the stator phases during operation, a power stage (122) being associated with the stator phases in order to control their energization. In this method, energization of the stator phases is interrupted while the rotor (208) is rotating. A value (UIND) characterizing an induced voltage, and a value (ω) characterizing a rotation speed of the motor, are ascertained. On the basis of those values, the value of the temperature-dependent motor parameter (ke) is derived. The invention also concerns a motor for carrying out such a method. The method requires no temperature sensor, and can be integrated into an “embedded program” such as the program otherwise needed for electronic commutation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.