Impulse control of lighting, motor r.p.m., vibrational tape drive, and grid disturbance trip at reduced power consumption

摘要

A control unit for impulse control of lighting, motor re­volutions, vibrational tape operation and grid disturbance trip at reduced power consumption utilizes a combination of electronic oscillation elements and other parts. This, in the case of lighting control, results in the prevention of increased switch-on current and voltage and thereby pro­tection of lamps from damage. The respective r.p.m. control of motors makes it possible to select and adjust the number of revolutions from O to the synchronized speed without application of the conventional capacitor with a single-­phase asynchronous motor. The conventional connection of a three-phase asynchronous motor is replaced resulting in power saving up to 60 % and the possibility of smooth motor starting. Starting vibrational tapes can be effected using synchronized frequency and voltage control, which has not been feasible so far. Also, the unit enables elimination of grid disturbances (noise) to the effect that an appliance causing disturbances does not affect another appliance at the same grid. In the form of a chip the unit can be mounted on existing motors without requiring any modific­ations to construction.