Design and evaluation of interior permanent magnet compressor motors for commercial transcritical CO2 (R-744) heat pump water heaters

This paper describes the design and experimental evaluation of two high efficiency interior permanent magnet (IPM) motors for use in a commercial transcritical CO2 (R-744) heat pump water heater (HPWH). Two IPM topologies, 36 slot 6 pole and 9 slot 6 pole, were selected, optimized, and prototyped using a common, flat bar interior permanent magnet rotor. The experimental analysis includes standard measurements of electrical machine quantities, and light load dynamometer tests. Initial measurements of the CO2 compressor and HPWH system performance with a stock line fed induction machine have been completed.

[1]  Tobias H. Sienel,et al.  Reliable, Economic, Efficient CO2 Heat Pump Water Heater for North America , 2006 .

[2]  Rakib Islam,et al.  Noise and vibration characteristics of permanent magnet synchronous motors using electromagnetic and structural analyses , 2011, 2011 IEEE Energy Conversion Congress and Exposition.

[3]  Dan M. Ionel,et al.  Modeling and design optimization of PM AC machines using computationally efficient - finite element analysis , 2010, 2010 IEEE Energy Conversion Congress and Exposition.

[4]  Dan M. Ionel,et al.  Modeling and Parametric Design of Permanent-Magnet AC Machines Using Computationally Efficient Finite-Element Analysis , 2012, IEEE Transactions on Industrial Electronics.

[5]  S. Evon,et al.  Induction versus permanent magnet motors , 2009, IEEE Industry Applications Magazine.

[6]  René Rieberer,et al.  CO2 Heat Pump Water Heater: Simulation and Test Results , 1998 .

[7]  Dan M. Ionel,et al.  Automated Multi-Objective Design Optimization of PM AC Machines Using Computationally Efficient FEA and Differential Evolution , 2013, IEEE Transactions on Industry Applications.

[8]  D. M. Ionel,et al.  Multi-objective optimization of PM AC machines using computationally efficient - FEA and differential evolution , 2011, 2011 IEEE International Electric Machines & Drives Conference (IEMDC).

[9]  T. Marcic,et al.  Direct Comparison of Induction Motor and Line-Start IPM Synchronous Motor Characteristics for Semi-Hermetic Compressor Drives , 2012, IEEE Transactions on Industry Applications.