System of driving by electric motor machines which work in a per

Electricity: motive power systems – Positional servo systems – Adaptive or optimizing systems including 'bang-bang' servos

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318611, 318632, 318432, G05B 1302, H02P 600

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active

053069935

ABSTRACT:
Machines having torques variable as a function of the angle of rotation such as piston driving mechanisms like compressors, cam driving mechanisms, printing machines and looms, are driven by an electric motor in such a way that a trend in angular velocity which is dependent upon the angle of rotation, in particular also a constant angular velocity of the main driving shaft (2) of the driven machine, may be predetermined. To do this the angle of rotation (3) as well as the torque (4) are picked up off the main shaft (2) and fed to an adaptive control system (S) which, starting from the desired values (s0) of the angular velocity as a function of the angle of rotation, applies a corresponding correcting variable (Y) to the electric motor (1) and iteratively adapts it periodically in order to bring the trend in angular velocity of the main shaft (2) into agreement with the desired value (s0).

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Patent Abstracts of Japan, vol. 10, No. 380 (P-528) (2437), Dec. 19, 1986 & JP,A,61 169 916 (Hitachi Ltd.) Jul. 31, 1986.
8047B I.E.E.E. Transactions on Power Systems, vol. 3 (1988) Aug., No. 3, New York, N.Y., USA.

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