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

Author

Brown, Ian P. ; Critchley, Matthew W. ; Yin, Jiamin ; Memory, Stephen B. ; Elbel, Stefan W. ; Bowers, Chad D. ; Petersen, Michael ; Hrnjak, Predrag S. ; Sizov, Gennadi Y.

Author_Institution

A.O. Smith Corp. Technol. Center, Milwaukee, WI, USA

fYear

2012

fDate

15-20 Sept. 2012

Firstpage

2790

Lastpage

2797

Abstract

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.

Keywords

asynchronous machines; compressors; dynamometers; heat pumps; heating elements; load (electric); machine testing; permanent magnet motors; water; CO₂; CO₂ compressor measurements; HPWH system performance; IPM topologies; commercial transcritical CO₂ (R-744) heat pump water heaters; flat bar interior permanent magnet rotor; high efficiency IPM motors; interior permanent magnet compressor motor design; interior permanent magnet compressor motor evaluation; light load dynamometer tests; stock line fed induction machine; Heat pumps; Permanent magnet motors; Rotors; Stator windings; Torque; Water heating;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2012 IEEE

Conference_Location

Raleigh, NC

Print_ISBN

978-1-4673-0802-1

Electronic_ISBN

978-1-4673-0801-4

Type

conf

DOI

10.1109/ECCE.2012.6342379

Filename

6342379