Start and control method for a single-phase induction motor, a start and control system for a single-phase induction motor and an electronic start and control device applied to a single-phase induction motor

摘要

The present invention relates to a method, a system and an electronic device (15), especially designed for start and control of the functioning of a single-phase induction motor (12). Said motor (12) comprises a run winding (10) and a start winding (11), the start winding (11) is electrically associated to an electronic start device (15), the run winding (10) and the electronic start device (15) are electrically associated to an alternating voltage source (F) configured to supply feed energy to the motor (12), the start winding (11) is kept de-energized at a first operation instant (Top1) of the motor (12). More particularly, the present invention is configured to energize the start winding (11) through the electronic start device (15) in the condition in which a first voltage signal (Vsamp1), sampled from the alternating voltage source (F), through a sensor element (7), is lower than or equal to a first voltage reference (V1), or higher than or equal to a second voltage reference (V2), so as to initiate a start period of the motor (12).