Infinitely variable speed adjustment - of moving part of linear motor uses three- phase exciting winding and frequency converter

摘要

A linear motor has an infinitely variable speed adjustment device as in the main patent. The electrical energy for the linear motor (1) is supplied by a three - phase generator (3, 4) with a three-phase exciting winding connected to a frequency converter. In the rotor (4) of the three-phase generator, the sense of rotation of the exciting field relative to the rotor (4) is opposite to the sense of rotation of the rotor (4). The number of revolutions for driving the rotor (4) is higher than the number of revolutions corresponding to the frequency of the three-phase circuit (6).