Method and system for estimating inertia of 2-mass system during

Details Method and system for estimating inertia of 2-mass system during Method and system for estimating inertia of 2-mass system during

1993-11-30

1995-12-19

Wysocki, Jonathan

Electricity: motive power systems

Automatic and/or with time-delay means

Rate-of-change of a condition

388811, 318648, H02P 700

Patent

active

054771145

ABSTRACT:
A method and system for estimating an inertia of 2-mass system constituted by a motor and a load connected through a torsionable shaft during operation. The estimating method is implemented as follows: (a) obtaining a deviation between a motor speed preset value and a motor speed in a deviation section; (b) inputting the deviation from the deviation section into an adding section through a speed control amplifier; (c) obtaining a motor generating torque by inputting the output from the speed control amplifier and the load torque estimate into an adding section; (e) inputting the motor generating torque into a model of the 2-mass system; and (f) obtaining an inertia error by inputting the load torque estimate into the inertia error estimating section. With this method, it becomes possible to estimate the inertia of the 2-mass system even if the load inertia is varied during operation.

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C. Ohsawa et al., "Parameter Identification of 2-Mass System and Suppression of Torsional Vibration", International Power Electronics Conference, Apr. 1990, pp. 428-435.

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