Intelligential Commutation Improvement of Large DC Machines

Abstract

Large DC machines are applied to metal rolling mill motors, and their commutation performances are very important to obtain the high responsive operation. But, there is a limit to improve the transient commutation by mechanical reconstruction, because its cause is the lag of commutating flux, at the rapid change of armature current.
This paper describes the development of intelligential DC machine with the electronic improving equipment of transient and steady-state commutation, that adjusts automatically the most suitable commutation by AI system. The improvement of transient commutation brings the increase of change rate of armature current, so it enables to solve the requirment of control, and the performances of total drive system will be rise up remarkably.