The Boeing Company

Ted L Bartlett

Mervin E Eaton

A ferroresonant regulator for use in an inductively coupled high frequency power distribution system. A constant current resonant power source, comprising a sine wave oscillator (12), an amplitude controlled amplifier (16), a power amplifier (20), and an impedance matching transformer (24), provides current at a frequency of 38 kHz to a supply loop (68) that is installed in the floor of an aircraft passenger space. A current sensing transformer (32), and a voltage sensor (46) produce feedback signals that are used to control the amplitude of the current circulating in the supply loop, maintaining it substantially constant. A plurality of multiturn coils (70) are disposed proximate the supply loop. Connected to each of the multiturn coils is a saturable transformer (76), which includes a secondary winding attached to a load comprising an entertainment and passenger service system installed in each seat. A tertiary winding (106) on the saturable transformer is connected across a resonance capacitor (108). The capacitor is used to resonate the saturable transformer, causing its core to saturate. A constant voltage is thus maintained across the connected load with respect to variations in the load and variations in the inductive coupling between the multiturn coil and the supply loop.

Growing community of inventors

Bellevue, WA, United States of America

Ted L Bartlett