Sensorless starting of a wound-field synchronous starter/generator for aerospace applications

The present paper describes an angle and speed estimation algorithm suitable for the control of a wound-field synchronous starter/generator (S/G) without position sensors for aircraft engine starting applications. The proposed control strategy is based on the injection of a high-frequency voltage si...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2012-09, Vol.59 (9), p.3579-3587
Main Authors: Griffo, A., Drury, D., Sawata, T., Mellor, P. H.
Format: Article
Language:English
Subjects:
Aerospace engines
Aircraft components
Algorithms
Asymptotic properties
Electric potential
Estimation
Generators
Position estimation
Rotors
sensorless control
starter/generator
Starters
Stator windings
Studies
synchronous motor
Torque
Voltage
Windings
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Summary:The present paper describes an angle and speed estimation algorithm suitable for the control of a wound-field synchronous starter/generator (S/G) 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. Modeling 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.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2011.2159953