Design Analysis of a Permanent Magnet Brushless Generator with Two Counter Rotating Rotors for Small-Wind Turbine

Dranca, Marius; Chirca, Mihai; Cosman, Sorin Iulian; Breban, Stefan

doi:10.1109/icate.2018.8551431

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…Units DR-PMSM1 [9] DR-SynRM [10] DR-PMSM2 [11] DR-PMSG [8] DR-HESM [12] DR-FSSM [13] Coupling When dealing with dual rotor topologies, there is usually a magnetic connection between the rotating armatures and, rarely, a mechanical connection. In the first case, the flux on both rotors is controlled and affected by the stator's flux.…”

Section: Structure Featurementioning

confidence: 99%

“…In the first case, the flux on both rotors is controlled and affected by the stator's flux. Thus, a very good power density is obtained since both rotors share the same yoke [8]. On the other hand, when a mechanical connection is used, a supplementary yoke (of the second rotor) exists.…”

Section: Structure Featurementioning

confidence: 99%

“…1d shows a double rotor electrical machine, mainly excited through PMs. Sometimes, it is called a "counterrotating electrical machine" [8]. It is suited for generator power applications and has an acceptable power density.…”

Section: Introductionmentioning

confidence: 99%

“…-A (second variant) PMSM (DR-PMSM2), [11], having mechanical coupling and a high gear ratio, but for the given power, the efficiency is poor. -A permanent magnet synchronous generator (DR-PMSG), [8], which uses cheap materials, and consequently, the power density is affected. -A hybrid excited synchronous machine (DR-HESM), [12], which again uses both rotors to strengthen the torque, and its major drawback is the presence of brushes to feed the field winding.…”

Section: Introductionmentioning

confidence: 99%

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Novel Differential Evolutionary Optimization Approach for an Integrated Motor-Magnetic Gear Used for Propulsion Systems

et al. 2021

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This paper addresses the proposition of an electrical multiport propulsion system. This traction system contains an electric motor to which a magnetic gear is attached; it is called an integrated motormagnetic gear (IMMG) propulsion unit. This IMMG has two shafts and two levels of torque and speed. Thus, it is suited for the propulsion of an electric tractor, which has different diameters for the front and rear wheels. The IMMG design is optimized based on the differential evolution (DE) algorithm. For such an algorithm, offline tuning of its parameters may fail given the different characteristics of optimization problems. Therefore, a parameter adaptation that considers feedback from the search process can be an alternative. In this work, we propose a novel online strategy to control the DE algorithm's parameters. This strategy is based on a simple adaptation mechanism to generate a promising mutation parameter value for each individual in the population. The design process was evaluated through experiments, and a good correlation was found between the designed performances and tested results.INDEX TERMS differential evolutionary optimization, integrated motor-magnetic gear, EV propulsion.

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