ES271881U - Control device for starting stop motor slows. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Control device for slow start/stop of motors, preferably of three-phase motors, essentially characterized by being constituted from an electronic circuit comprising four main blocks, determined by a) aa alternating current source to direct current in low tension, b) a trip control stage, c) an amplification stage and d) a building block, it being provided that the trip control stage is equipped with phase detection devices of the current applied to the motor as well as production elements. Of trigger pulses, which are applied, through the amplification stage, to the corresponding doors of a plurality of scr, controlled silicon rectifiers, determinants of the switching block and with the particularity that the elements of production of the trigger pulses have means of continuous variation of the firing angle of each scr in order to apply to the motor an upward voltage ramp at the moment of its start or a downward voltage ramp at the time of its arrest. (Machine-translation by Google Translate, not legally binding)