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Document IIF

Détection sans capteur de la position du piston d’un compresseur frigorifique linéaire sans huile.

Sensor-less position detection of oil-free linear compressor for refrigeration.

Numéro : pap. n. 313

Auteurs : JIANG H., LIANG K., LI Z.

Résumé

Linear compressors can be used for refrigeration systems due to higher efficiency, oil-free operation and compactness. One major challenge for linear compressor is the sensing of piston position. This paper presented a novel method to detect the piston position at resonance without a piston position sensor. Inductive coil was wounded around the middle core and the end core. The peak-to-peak flux linkage at two zero crossing points of measured current was calculated for various strokes for resonance operation. The results show that both the peak-to-peak flux linkage of end core and middle core vary linearly with the stroke. A linear function was fitted for peak-to-peak flux linkage at various strokes. The maximum error between calculated peak-to-peak flux linkage with measured current and linear fitting result is about 6%. When linear compressor is operated off resonance, the flux linkage difference is smaller than that at resonance. It can be concluded that inductive coil can be used to detect the compressor stroke thus to modulate the cooling capacity of the refrigeration system.

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Pages : 6

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  • Prix public

    20 €

  • Prix membre*

    Gratuit

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Détails

  • Titre original : Sensor-less position detection of oil-free linear compressor for refrigeration.
  • Identifiant de la fiche : 30026404
  • Langues : Anglais
  • Source : Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Date d'édition : 24/08/2019
  • DOI : http://dx.doi.org/10.18462/iir.icr.2019.0313

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