Comparative study on performance characteristics of PM and reluctance machines equipped with overlapping, semi‐overlapping, and non‐overlapping windings

Gündoğdu, Tayfun; Kömürgöz, Güven

doi:10.1049/iet-epa.2019.0743

Cited by 3 publications

(3 citation statements)

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“…In this study, the predicted efficiency

η_{P}

of each case is calculated with

η_{P} = \frac{P_{out}}{P_{out} + P_{cu} + P_{pm} + P_{core} + P_{add}} \times 100

where

P_{out}

P_{core}

P_{cu}

P_{add}

are output power, core loss, copper loss, PM loss due to the eddy currents induced in PMs, and additional losses, respectively. Details about the power loss calculations of the IPM machines having NSWs can be found in [50]. As expected,

P_{core}

increase with speed increasing while the

P_{cu}

and

P_{pm}

increase with excitation current and hence torque increasing.…”

Section: Experimental Validationmentioning

confidence: 74%

“…A 51.5% fill factor is achieved thanks to NSWs with prepressed coils. More details about the structure and properties of the new winding topology and its compatibility with other machine technologies can be found in the previous studies [49, 50].…”

Section: Nsw Topologymentioning

confidence: 99%

“…In [49], to be able to reduce the end‐winding length and hence increase the efficiency without sacrificing the output torque, a new winding technique, named as novel semi‐overlapping winding (NSW), is introduced. Moreover, a comprehensive performance comparison between PM and reluctance machines equipped with overlapping, semi‐overlapping and non‐overlapping windings is presented and remarkably improved steady‐state performance characteristics for NSW IPM machine are reported in [50]. In this study, FW ability of IPM machine equipped with NSWs is investigated by considering the impact of number of turns, stack length together with the sole and combined effect with number of turns, distance between one pole PMs, rotor yoke depth, radius between one pole PMs, width of main magnetic bridge, magnet segmentation with air (without bridge) and iron (with iron bridge) for the first time.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of design parameters on flux‐weakening performance of interior permanent magnet machines with novel semi‐overlapping windings

Gündoğdu

Kömürgöz

2020

IET Electric Power Applications

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This study performs a design and parametric study of interior permanent‐magnet (IPM) machines equipped with novel semi‐overlapping windings (NSWs). The influence of the key design parameters including; number of turns per phase, stack length, distance and angle between V‐shaped magnets, rotor yoke thickness, magnetic bridge width and thickness and number of magnet segments on the flux‐weakening (FW) performance characteristics are evaluated in detail. The influence of material of segmentation (material of bridge namely, air or iron) is also considered. A combination of analytical calculation‐based program and a time‐stepping 2D finite‐element analysis based program are employed to evaluate the FW characteristics. The accuracy of the FW calculations, particularly the performance at high‐speed regions, is verified over changes in torque components; namely reluctance and permanent magnet (PM), inductance components, PM flux coefficient and inverse saliency ratio due to the change in considered design parameter. The electromagnetic torque, torque ripple, output power and FW capability are investigated by parametric analyses. Moreover, the power losses and efficiency maps together FW curves are calculated for the optimal NSW IPM machine. The experimental measurements, taken from manufactured prototype, verify that the performed analyses and methods described in this study are accurate and reliable.

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“…In this study, the predicted efficiency