Three-phase alternating-current motor i.e. three-phase, four-pole asynchronous motor, controlling arrangement for power electronic fields, has diodes connected to transistors in reverse direction, and control device controlling transistors

摘要

The arrangement (1) has parallel transistor branches (10-12) connected with a phase of an alternating current source (3) at an input-side by capacitors and connected with each other at an output side. Insulated gate bipolar transistors (15-18) are connected in series. Diodes are connected in parallel to the transistors in a reverse direction aligned against a forward direction of the transistors. A three-phase alternating-current motor (2) is connected with a loading path of the branches in an area between the transistors. A transistor-gate control device (5) controls the transistors. An independent claim is also included for a method for controlling a three-phase alternating-current motor.