Stop control device for single-phase asynchronous motor with capacitor

摘要

The control unit (14) is designed to stop operation of the motor (2) when an overload exceeds a set value. The unit (14) includes a device (8) for measuring phase shift between one of several parameters: voltage or current (U1,U2,I2,I3) of the principal phase (1) and/or the auxiliary phase (2) and another of these parameters. The unit (14) interrupts the supply to the motor (2) when the measured delay time is less than a set value contained in memory (13).