General Electric Company

Arthur Vorwerk Radum

Hao Huang

Rui Zhou

David Dimitri Karipides

A bus centering device for use in an aircraft electrical power distribution system that includes a positive bus rail, a negative bus rail, and a ground is described. The device includes a central node, a first and second switching component configured to couple the central node to the positive rail and the negative rail for a first and second predetermined duty cycle, respectively. The device includes an inductive component coupled between the central node and ground, and is configured to maintain a voltage at the central node substantially equal to ground, wherein a voltage between the positive rail and the central node is maintained substantially equal to a voltage between the negative rail and the central node. The device includes a first and second current limiting device configured to maintain a continuity of current from the inductive component when the first and second switching components are turned off.

Method and apparatus for electrical bus centering

A control for an inverter-driven switched reluctance generator includes an angle control for generating a turn-on angle signal and a pulse width angle signal for switching respective inverter switches according to a function F(.theta..sub.on, .theta..sub.off) which depends on the machine geometry and speed of operation. A linearizer is provided for adjusting the turn-on angle signal and the pulse width angle signal by varying the value of the function F(.theta..sub.on, .theta..sub.off) inversely with the dc bus voltage so as to maintain a substantially constant average generator current. In this way, open loop operation of the switched reluctance generator drive is stabilized, and closed loop operation is improved, i.e., by making the system response to step load and commanded voltage changes independent of the dc bus voltage. The control further includes a commutator for switching each respective phase of the switched reluctance generator drive according to the adjusted turn-on angle signal and the adjusted pulse width angle signal generated by the linearizer.

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Mason, OH, United States of America

Arthur Vorwerk Radum