Three-phase alternating current motor i.e. asynchronous motor, controlling device, has brackets symmetrically arranged around cores, and air gaps provided between brackets and yokes, where radial gap width is seen or removed in direction

摘要

The device has partial throttles (1a-1c) symmetrically arranged together in the form of three windings (2a-2c) on common ferromagnetic ring cores (3) in a circumferential direction. The windings of the cores and brackets (4a-4c) are enclosed, where the brackets are extended in the direction. The brackets are symmetrically arranged together around the cores, and yokes (5a-5c) extended in the direction lies opposite to the brackets. Air gaps (6aa, 6ab, 6ba, 6bb, 6ca, 6cb) are provided between the brackets and the yokes. A radial gap width of the gap is seen or removed in the direction.