Sensorless Starting of a Wound-Field Synchronous Starter/Generator for Aerospace Applications

A Griffo, D Drury, Sawata Tadashi, PH Mellor

Research output: Contribution to journalArticle (Academic Journal)peer-review

76 Citations (Scopus)


The present paper describes an angle and speed estimation algorithm suitable for the control of a wound-field synchronous starter/generator without position sensors for aircraft engine starting applications. The proposed control strategy is based on the injection of a high-frequency voltage signal and the subsequent demodulation of the resulting high-frequency stator current components. The coupling due to high- speed operation that degrades the estimation accuracy of similar algorithms based on signal injection is taken into account. Modelling of the machine response to a high-frequency voltage signal injected into the estimated d-axis is presented, also considering the influence of damping circuits both on the d- and q-axis. Local asymptotic stability of the proposed observer is also demonstrated. Through extensive experimental results the proposed control technique is shown capable of guaranteeing full-torque sensorless operation at zero speed and sustained operation up to engine ignition speed.
Translated title of the contributionSensorless Starting of a Wound Field Synchronous Starter/Generator for Aerospace Applications
Original languageEnglish
Pages (from-to)3579-3587
JournalIEEE Transactions on Industrial Electronics
Issue number9
Publication statusPublished - Jun 2011

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