Method of operating an electronically commutated motor, and...

Details Method of operating an electronically commutated motor, and... Method of operating an electronically commutated motor, and...

2008-01-15

2008-01-15

Duda, Rina (Department: 2837)

Electricity: motive power systems

Switched reluctance motor commutation control

C318S132000, C318S254100

Reexamination Certificate

active

11420213

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.

REFERENCES:
patent: 5457366 (1995-10-01), Wehberg et al.
patent: 6825627 (2004-11-01), Berroth et al.
patent: 2004/0041549 (2004-03-01), Halfman et al.

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