MODELING FREQUENCY CONVERTER IN THE CONTROL SYSTEM UNIVERSAL SEWING MACHINE
Analysis of existing universal electric sewing machines showed them the opportunity to improve energy efficiency, reduce run-time manufacturing operations at sewing, improved thermal conditions of the motor. Nowadays, thanks to the power of transforming technology created and commercially produced various kinds of semiconductor frequency converters. This determined the rapid development and widespread use of variable-frequency induction electric. The use of variable-frequency electric induction in universal sewing machines are good for reducing the time and disconnecting the motor running start it while performing additional operations while sewing.