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Design of V-shaped interior permanent magnet machines for HVAC applications.

Author(s) : RUIZ C. A. C.

Type of monograph: Master thesis

Summary

Recent regulatory changes have been proposed to phase down the use of hydrofluorocarbon (HFC)-based refrigerants in air conditioning and refrigeration systems. The proposed low global warming potential alternatives (low-GWP) are characterized by lower volumetric capacities, which require either higher displacements or higher speeds to meet compressor loads. In order to address this, the coupled optimization of a compressor system and its electric drive has been proposed. The primary goal of this thesis is to establish tools that can be used to assess the impact that alternative low-GWP refrigerants have on the sizing and performance of electrically driven compressors. Toward this goal, a method-of-moments-based model has been established and structured to enable rapid evaluation of the electromagnetic performance of V-shaped interior magnet machines. Contributions to the model formulation include the use of a judicious combination of point and pulse basis functions to evaluate machine behavior under saturation of stator and rotor steels. Also included is a straightforward means to include multiple operating points with minimal additional computational expense. Coupled to the electromagnetic model is a thermal equivalent circuit model that includes conductive heat transfer between slot winding bundles and stator steel. It also includes convective heat transfer from the stator to the rotor through the airgap. The proposed models have been validated using commercial finite-element based software. Subsequently, they have been applied in design optimization studies used to compare the efficiency and size (mass) between machines designed for a common HFC refrigerant (R410A) and a proposed alternative (R454B).
 

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Pages: 71 p.

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Details

  • Original title: Design of V-shaped interior permanent magnet machines for HVAC applications.
  • Record ID : 30033144
  • Languages: English
  • Subject: Technology, HFCs alternatives
  • Publication: Purdue University
  • Publication date: 2023
  • DOI: http://dx.doi.org/https://doi.org/10.25394/PGS.24759672.v1

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