POWER REGENERATION CONTROL CIRCUIT OF INVERTER

摘要

PURPOSE:To economically regenerate power under a simple control in a compact manner by connecting a semiconductor switching element capable of self-extinguishing in anti-parallel with a rectifier to a converter, and controlling the firing phase. CONSTITUTION:3-phase AC is full-wave-rectified in a converter connected in a bridge with diode composite transistors CRT1-CTR6, and power is stored in a DC voltage intermediate circuit which has a capacitor C. This power is converted to arbitrary 3-phase AC via diode composite transistors ITR1-ITR6 of an inverter, and supplied to a motor M of a load. The power is regenerated by controlling the firing phase of a semiconductor switching element capable of self- extinguishing of the transistors CTR1-CTR6 in the converter.