METHOD FOR WIRING MULTILAYER POWER CONDUCTORS (RIBBON CABLES OR PRINTED-CIRCUIT BOARDS) WHEN LAYING THREE-PHASE CONDUCTING COMMUNICATION LINES TO SUPPRESS NOISE DUE TO ELECTROMAGNETIC PICKUP CAUSED BY SELF-INDUCTION IN POWER CIRCUITS Russian patent published in 2005 - IPC

FIELD: printed-circuit boards, multilayer conductors, and ribbon cables.

SUBSTANCE: proposed method involves spatial disposition of conducting communication lines which makes it possible to compensate for electromagnetic pickups in three-phase power circuits caused by self-induction and is based on compensating effect attained by superimposing electromagnetic inductances shifted in phase due to phase shift of currents carried by three adjacent conductors; novelty is that only positive (forward) currents carried by three adjacent layers and shifted in phase through 120 deg. are used in three-phase circuits. Passing three-phase current of same amplitude through three adjacent conducting tracks disposed strictly in parallel one on top of other in these three adjacent layers where columns built of conducting tracks occurring in three layers are formed we shall obtain equal-amplitude vectors in each layer using cyclic phase transfer; these vectors correspond to harmonic oscillations on vector diagram from all three phases (A, B, C).

EFFECT: maximized compensation of noise caused by self-induction.

4 cl, 3 dwg