METHOD FOR STARTING A SINGLE-PHASE INDUCTION MOTOR, STARTING DEVICE FOR A SINGLE-PHASE MOTOR AND STARTING SYSTEM THEREFOR

摘要

The present invention relates to a starting device for a single-phase induction motor, comprising a stator (M) with a running winding (B1) and a starting winding (B2), a starting device (28) connecting the starting winding (B2) to an alternating voltage supply source (F) when in a closed state; the start switch (S1) being moved to an open position when the start of the motor is ended, the starting device (28) comprising: a start switch (S1), an electronic signal-processing device (30) receiving current signals originating from a current sensor (RS) that senses the current flowing through the start switch (S1) and receiving voltage signals from a voltage zero-crossing sensor SV, wherein the control unit (30) instructs the closing and opening of the start switch (S1) in accordance with the interpretation of the signals from the voltage and current zero- crossing sensors, and from time sensors.