Design aspects of high torque density-low speed permanent magnet motor for electric two wheeler applications

Nair, Sreeju S.; Nalakath, Shamsuddeen; Santhi, Immadisetty; Dhinagar, S. Jabez; Deshpande, Yateendra; Toliyat, H.A.

doi:10.1109/iemdc.2013.6556180

Cited by 10 publications

(3 citation statements)

References 12 publications

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“…2. Conventionally, high-pole-count outer-rotor machines with high-energy-product NdFeB magnets are used for this application [10]- [12]. Despite the high torque density of such motors, the short duty torque capability is not matched for the continuously variable transmission internal combustion engine drive.…”

Section: Requirements Of the In-wheel Direct Drive Motormentioning

confidence: 99%

“…The derivation is treated in detail in a prior publication [12]. The fundamental requirement is to improve the stall torque and speed range of the electric vehicle by replacing the existing benchmark motor with an improved one while reducing its size.…”

Section: A Specifications For the In-wheel Hub Motor For Electric Twmentioning

confidence: 99%

“…The SL 54-slot 60-pole configuration was chosen [12], and the initial design optimization is performed by a grid search using the analytical motor model. The main dimensions of the prototype motor are given in Table V.…”

Section: Prototype Construction and Testsmentioning

confidence: 99%

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High-Torque-Density Single Tooth-Wound Bar Conductor Permanent-Magnet Motor for Electric Two Wheeler Application

Deshpande

Toliyat

Nair

et al. 2015

IEEE Trans. on Ind. Applicat.

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The design of an in-wheel direct-drive motor for electric and hybrid electric two wheelers is studied, with particular focus on the use of bar-wound conductors in stator. In serving the space-constrained design problem of simultaneously achieving conflicting objectives of weight, cost, and short-term torque rating, this paper aims at comparing machines equipped with bar-wound stators with multistrand wound machines. This paper proposes different conductor shapes and arrangements that combine the advantages of fractional slot concentrated windings with bar conductors and describes the special fabrication method adopted for semiclosed slot geometry. The implications of using bar conductors on eddy effects and thermal equivalent circuit of the motor are studied and characterized experimentally. Finally, to investigate the impact of bar windings over multistranded windings on the ultimate performance metrics, a design study is conducted using a multiobjective optimizer for the two cases, and the resulting Pareto optimal sets are compared. The concept of the bar conductor tooth-wound motor is tested on a laboratory prototype, and the test results for skin effect, thermal contact resistance, and load tests are presented.

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Section: Requirements Of the In-wheel Direct Drive Motormentioning

confidence: 99%

Section: A Specifications For the In-wheel Hub Motor For Electric Twmentioning

confidence: 99%