Circuit arrangement for energy economy

Details Circuit arrangement for energy economy Circuit arrangement for energy economy

D - Textiles, Paper

05

B

342/35, 318/82

D05B 69/18 (2006.01) H02P 3/18 (2006.01) H02P 23/00 (2006.01) H02P 29/04 (2006.01)

Patent

CA 1157549

ABSTRACT OF THE DISCLOSURE The present invention provides a circuit arrangement for energy economy in a drive comprising induction motor and a clutch/brake unit, particularly for sewing machines, in which the windings of the induction motor are dimensioned so that the motor speed remains virtually constant in a stable speed range under normalservice conditions, and inwhich tneclutch/bra~e unit serves to control the drive output speed, so that the motor oper- ates ln an alternation of load phases and no-load phases, charac- terized in that switches are included in the current paths of the windings which reduce the current through the windings to a prescribable degree, whilst a modulation circuit to control the acceleration of the motor speed and its persistence in the stable speed range durlng load variations is associated with the switches.

360987

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