Method of estimating load inertia for a motor

Details Method of estimating load inertia for a motor Method of estimating load inertia for a motor

2007-10-30

2007-10-30

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Mechanical measurement system

C702S010000, C073S862270

Reexamination Certificate

active

11565031

ABSTRACT:
A method of estimating load inertia for a motor is provided that can estimate the load inertia even when a cogging torque of the motor is large or resonance occurs in the mechanical system of the load. Vibration is detected in an acceleration feedback signal. An estimated inertia gain Knis multiplied by a coefficient α of zero (0) or more but less than one (1) when the detected vibration is equal to or more than a predetermined level, or the estimated inertia gain Knis multiplied by a coefficient α of one (1) when the detected vibration is less than the predetermined level.

REFERENCES:
patent: 6736018 (2004-05-01), Terada
patent: 7187148 (2007-03-01), Okita et al.
patent: 2001/0040439 (2001-11-01), Kato et al.
patent: 2000-346738 (2000-12-01), None
“High-performance Control of a Servomotor using a Low Precision Shaft Encoder -Instantaneous Speed Observer and Identification of the Inertia Moment-”, Yoichi Hori et al., T.IEE Japan, vol. 114-D, No. 4, '94, pp. 424-431, (English abstract included).

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