LUT-less Sensorless Control of Synchronous Reluctance Machines using the Locus of Incremental Saliency Ratio Tracking (LIST)

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LUT-less Sensorless Control of Synchronous Reluctance Machines using the Locus of Incremental Saliency Ratio Tracking (LIST)

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Varatharajan A. / Pellegrino G. / Mariani G. B. / Voyer N. / Satake A.

This paper deals with the LUT-less sensorless control of synchronous reluctance (SyR) machines at zero and low speed, where LUT-less stands for avoiding the use of flux-map look-up tables (LUTs) or other pre-determined machine parameters. The new signal-injection based control scheme called the Locus of Incremental Saliency ratio Tracking (LIST) is presented, where a pulsating high-frequency voltage component is used for position tracking and a second rotating signal-injection is dedicated to on-line estimating the incremental saliency ratio. A trajectory of constant incremental saliency ratio is used for torque regulation, resulting in stable control at all operating conditions, including overload. This despite the effect of cross-saturation, which is known to introduce position error and harm the control stability progressively with the load. The proposed scheme is validated experimentally on a 1.1 kW SyR machine test-bench. Alternative LUT-less torque control laws are investigated, and their stability limits put in evidence using convergence analysis and experiments.

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Title :

LUT-less Sensorless Control of Synchronous Reluctance Machines using the Locus of Incremental Saliency Ratio Tracking (LIST)

Contributors:

Varatharajan A. (author) / Pellegrino G. (author) / Mariani G. B. (author) / Voyer N. (author) / Satake A. (author) / Varatharajan, A. / Pellegrino, G. / Mariani, G. B. / Voyer, N. / Satake, A.

Publication date :

2022-01-01

DOI :

https://doi.org/10.1109/TIE.2021.3100990

Type of media :

Article (Journal)

Type of material :

Electronic Resource

Language :

English

Keywords :

Sensorless control , signal-injection , incremental saliency ratio , synchronous reluctance machine