Maximization of Efficiency of IPMSM by Quasi-Newton Method

Baek, Sungmin; Kim, Gyu-Tak; Shin, Heung-Kyo

doi:10.23919/icems.2018.8549065

Cited by 1 publication

(1 citation statement)

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“…In this regard, the components of the vehicle's powertrain play a key role. Of these, the electrical machine is experiencing an everincreasing interest and research focusing on the maximization of their power density [5], efficiency [6] and reliability [7] is now underway at an unprecedented rate.…”

Section: Introductionmentioning

confidence: 99%

Segmented Hairpin Topology for Reduced Losses at High-Frequency Operations

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et al. 2022

IEEE Trans. Transp. Electrific.

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Nowadays, one of the key challenges in transport electrification is the reduction of components' size and weight. The electrical machine plays a relevant role in this regard. Designing machines with higher rotational speeds and excitation frequencies is one of the most effective solutions to increase power densities, but this comes at the cost of increased losses in cores and windings. This challenge is even more pronounced in preformed windings, such as hairpins, which enable higher slot fill factors and shorten manufacturing cycle times. In this work an improved hairpin winding concept is proposed, aiming to minimize high-frequency losses while maintaining the benefits deriving from the implementation of hairpin windings onto electrical machines. Analytical and finite element models are first used to assess the high-frequency losses in the proposed winding concept, namely the segmented hairpin, proving the benefits compared to conventional layouts. Experimental tests are also performed on a number of motorettes comprising both conventional and proposed segmented hairpin configurations. Finally, these experimental results are compared against those collected from motorettes equipped with random windings, demonstrating the competitiveness of the segmented hairpin layout even at high-frequency operations.

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Section: Introductionmentioning

confidence: 99%