Drehstromsteller mit interruptgesteuerter Phasenanschnittsteuerung

摘要

This invention concerns a three-phase current regulator with interrupt-performed phase control characterized by a simple, cost-effective design, particularly by the use of a simple microcontroller (1) with only one or two interrupt inputs. This is made possible by forming zero crossover signals (U0A, U0B, U0C) the edges of which can be used for interrupt control. Interrupt routines in the program of the microcontroller (1) control the times for output of firing signals (ZA, ZB, ZC) starting exclusively from the zero crossovers as data about the three-phase network.