Device and process for controlling the motor drives of textile machines

A process for controlling a plurality of motor drives (121) integral with motors of textile machines, characterized in that it contains the following phases:

• regulation of the nominal value of revolutions relating to a given motor drive (121), so that a measuring and controlling device (101) can, after sensing the true value of the revolutions of said motor drive (121), communicate said true number of revolutions to an actuating device (112) connected to the same and to its respective actuating device (C1, C23, CF, CC),
• a performance, on the part of said actuating device (112), of a deferential operation between said true number of revolutions received from said measuring and controlling device (101) and said nominal number of revolutions transmitted by a central electronic unit (111) and depending on the technological operating parameters of said textile machine,
• an initialization, on the part of said actuating device (112), of said true number of revolutions of the said motor drive (121), which turns out to be equal to the sum of said ideal number of revolutions, memorized inside an application program of said central electronic unit (111) and a value resulting from said differential operation,
• a correction, on the part of said actuating device (112), of said true number of revolutions of said motor drive (121) so as to cancel out said value resulting from said differential operation,
• a limiting amount of said value resulting from said differential operation, for an infinitesimal instant and therefore tending to be zero, if said limiting amount turns out to be greater or smaller than zero, said true number of revolutions of said motor drive (121) is respectively decreased or increased on the part of said actuating device (112), if said limiting. amount turns out to be equal to zero, said actuating device (112) does not take any action to correct said true number of revolutions.