Derivation of motor line-current waveforms from the DC-link current of an inverter

T. C. Green, B. W. Williams

Research output: Contribution to journalArticle

Abstract

A technique for reconstructing motor line current using information from a single current transducer in the DC-link of an inverter is presented. All the instantaneous motor line currents can be reconstructed with a bandwidth limited to half the inverter switching frequency. These waveforms are used to produce a high-bandwidth signal, proportional to the scalar magnitude of the line current, and which is suitable for motor control purposes. A simple, low-cost implementation of the scheme demonstrates accurate results in a practical motor drive.

Original languageEnglish
Pages (from-to)196-204
Number of pages9
JournalIEE Proceedings B: Electric Power Applications
Volume136
Issue number4
Publication statusPublished - Jul 1989

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