Theoretic and Experimental Approach to the Adoption of Bonded Magnets in Fractional Machines for Automotive Applications

Ferraris, Luca; Ferraris, P.; Pošković, Emir; Tenconi, Alberto

doi:10.1109/tie.2011.2161069

Cited by 57 publications

(18 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A great deal of research interest is focused on the study and minimization of magnet losses in CW permanent magnet machines. Commonly used strategies to reduce magnet losses are by the use of bonded instead of sintered magnets, at the expense of lower magnet strength, or the use of sintered-segmented magnets [23][24][25][26][27].…”

Section: Magnet Lossesmentioning

confidence: 99%

Analysis and Experimental Verification of Losses in a Concentrated Wound Interior Permanent Magnet Machine

Dutta¹,

Chong²,

Rahman³

2013

PIER B

View full text Add to dashboard Cite

Abstract-It is well known that additional space harmonics in the air-gap magnetomotive force (MMF) distribution of the concentrated non-overlapping windings (CW) cause additional losses in the machine. This is especially so for machines used for traction applications where the machine requires to operate over its rated speed and frequency. In this paper, the authors investigates losses present in an interior permanent magnet (IPM) machine with CW designed to achieve a very wide field weakening range. Losses were quantified analytically and also using finite element methods.Loss estimations were experimentally verified in a constructed prototype machine. Based on the analysis, key losses were identified. The optimization process to minimize these losses and of improving efficiency were discussed in details. The segregation of the losses in the studied machine indicates that the losses in the magnet are much smaller compared to the rotor and stator core losses caused by the slot harmonics. Therefore, core loss minimization techniques for this type of machine will involve reduction of slot harmonics. Also, copper loss is found to be the most dominating component of the total loss. Hence, copper loss minimization should be part of the design optimization process.

show abstract

Section: Magnet Lossesmentioning

confidence: 99%

Analysis and Experimental Verification of Losses in a Concentrated Wound Interior Permanent Magnet Machine

Dutta¹,

Chong²,

Rahman³

2013

PIER B

View full text Add to dashboard Cite

show abstract

“…1). Bonded magnets could be an alternative [8], [9], [10]: different percentages of plastic binder allow to "tune" the resulting magnetic characteristic, moving in a wide range. They require a simpler and less expensive process and no special protective treatment [9].…”

Section: A Overview On Bonded Magnets and Soft Magnetic Composites (mentioning

confidence: 99%

Hybrid magnetic composite (HMC) materials for sensor applications

Ferraris

Franchini

Pošković

2016

2016 IEEE Sensors Applications Symposium (SAS)

Self Cite

View full text Add to dashboard Cite

Several applications adopt electromagnetic sensors, that base their principle on the presence of magnets realized with specific magnetic materials that show a rather high remanence, but low coercivity. This work concerns the production, analysis and characterization of hybrid composite materials, with the use of metal powders, which aim to reach those specific properties. In order to obtain the best coercivity and remanence characteristics various "recipes" have been used with different percentages of soft and hard magnetic materials, bonded together by a plastic binder. The goal was to find out the interdependence between the magnetic powder composition and the characteristics of the final material. Soft magnetic material (special Fe powder) has been used to obtain a low coercivity value, while hard materials were primarily used for maintaining a good induction remanence; by increasing the soft proportion a higher magnetic permeability has been also obtained. All the selected materials have been characterized and then tested; in order to verify the validity of the proposed materials two practical tests have been performed. Special magnets have been realized for a comparison with original ones (AlNiCo and ferrite) for two experimental cases: the first is consisting in an encoder realized through a toothed wheel, the second regards the special system used for the electric guitars.

show abstract

“…In the past activity a deep interest of the Authors has been addressed to new molding solutions [5], [6].…”

Section: Fig 1 -Brushless Motor Under Exammentioning

confidence: 99%

“…The authors' main goal is the evaluation of the potential benefits coming from the substitution of the anisotropic ferrite magnets with bonded ones [5], [6], [20] and the influence of the magnetization direction on the losses in the machine.…”

Section: Materials and Magnetization Processesmentioning

confidence: 99%

PM fractional machines adopting bonded magnets: Effect of different magnetizations on the energetic performance

Ferraris

Pošković

et al. 2012

2012 IEEE International Energy Conference and Exhibition (ENERGYCON)

View full text Add to dashboard Cite

The adoption of Permanent Magnets in small brushless machines for automotive applications is becoming frequent. Some research on bonded magnets is being carried on to substitute the ferrites. In the paper the parallel and radial magnetizations are considered: the different process complexity levels are analyzed and the effects on the iron losses and the energetic performances are evaluated by means of a simulation analysis and its experimental validation.

show abstract

Theoretic and Experimental Approach to the Adoption of Bonded Magnets in Fractional Machines for Automotive Applications

Cited by 57 publications

References 27 publications

Analysis and Experimental Verification of Losses in a Concentrated Wound Interior Permanent Magnet Machine

Analysis and Experimental Verification of Losses in a Concentrated Wound Interior Permanent Magnet Machine

Hybrid magnetic composite (HMC) materials for sensor applications

PM fractional machines adopting bonded magnets: Effect of different magnetizations on the energetic performance

Contact Info

Product

Resources

About