About channel independence for multi channel switched reluctance generating systems

Abstract

A dual channel generating system has exhibited remarkable channel independence from a control point of view. Initially it had been expected that the two channels would have significant control interactions since the magnetic circuits for both channels share most of the magnetic real estate in the switched reluctance machine (SRM). Thus both controllers would be attempting to regulate the same main flux especially in a 12/8 or 4 pole configuration. This expectation has also raised the question whether an 18/12 or 6 pole type SRM, which is presently under development, would show a similar channel interaction. The paper takes a closer look at the machine using simplified magnetic permeance analysis to get a better definition of the amount of channel interaction and to establish any difference in magnetic 4 pole and 6 pole SRM. The analysis is verified against the test results for the magnetics of a four pole SRM which have shown remarkable channel independence under steady state operating conditions.