SATURABLE CURRENT TRANSFORMER FOR CONTROL CIRCUIT OF SELF-EXCITED AC GENERATOR

摘要

PURPOSE:To eliminate the leakage magnetic flux by winding an exciting coil common in all phases on a core of a saturable current transformer of integral structure, and constructing to cancel the leakage magnetic flux generated from the exciting coil in the transformer. CONSTITUTION:Primary coil which has terminal L, K and secondary coil which has terminals l, k are wound respectively on three cores 8 corresponding to phases R, S, T. The first exciting coil which has terminals a1, b1 are commonly wound on the core section at the side before the cores 8, and the second exciting coil which has terminals a2, b2 are commonly wound on the core at the rear side. The terminal b1 of the first exciting coil and the terminal a2 of the second exciting coil are connected to form the exciting coil. The terminal a1 is connected to the output terminal of the automatic voltage regulator, and the terminal b2 is connected to the other output terminal of the automatic voltage regulator.