Method for measuring the speed of an electrical machine

Details Method for measuring the speed of an electrical machine Method for measuring the speed of an electrical machine

2007-07-24

2007-07-24

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system

Speed

C318S432000

Reexamination Certificate

active

11173577

ABSTRACT:
In a method for measuring the speed of an electrical machine having a stator, a rotor and a winding, in particular of an electronically commutated motor, a speed-measurement signal ω is sampled, in that a measured speed value ω(k) for the rotor is determined for each of a series of sampling instants. Moreover, a moment of inertia value for the mass moment of inertia of the rotor is determined. In addition, a current signal I is sampled, in that a current value I(k) for the electrical current in the winding is determined for each of the sampling instants. An estimated value ωs(k) for each of the measured speed values ω(k) is determined from a measured speed value ωk(k−1) assigned to an earlier sampling instant, from the current signal I and from the moment of inertia value. A tolerance band containing the estimated value ωs(k) is assigned to this estimated value ωs(k). If the measured speed value ω(k) lies outside of the tolerance band, the measured speed value ω(k) is replaced by a speed value ωk(k) that is within the tolerance band.

REFERENCES:
patent: 4680518 (1987-07-01), Kurakake et al.
patent: 5689165 (1997-11-01), Jones et al.
patent: 7030583 (2006-04-01), Lelkes et al.
patent: 2004/0111233 (2004-06-01), Gerlach
patent: 2005/0029972 (2005-02-01), Imai et al.
patent: 41 22 391 (1993-01-01), None
patent: 0 314 800 (1989-05-01), None
patent: 0 514 847 (1992-11-01), None
patent: 0 593 523 (1994-04-01), None

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