Brushless DC motor with a bonded permanent magnet and powder magnetic core

Przybylski, Marek; Ślusarek, B.; Gromek, J.

doi:10.1109/icelmach.2010.5608078

Cited by 12 publications

(6 citation statements)

References 4 publications

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“…Future work will regard the adoption of different binders for the realization of bonded magnets and different magnetization patterns [24], [40], as well as the possibility to realize machines with magnetic circuits constituted by soft magnetic composites [41]- [44].…”

Section: ) For What It Concerns the Efficiency Value As Alreadymentioning

confidence: 99%

Impact of a Bonded-Magnet Adoption on a Specific Fractional Motor Power and Efficiency

Ferraris

Franchini

Pošković

et al. 2014

IEEE Trans. on Ind. Applicat.

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The problem of evaluating the impact on the efficiency consequent to the adoption of bonded magnets in substitution of ferrites in small permanent-magnet machines is faced. That is necessary for the development of the main object of this paper: The evaluation of the obtainable performances of a specific brushless dc motor fractional motor through simple substitution of bonded magnets proposed by the authors to the ferrite magnets used up to now. The final aim is to make clear the practical adoptability of the proposal. Several prototypes produced in the authors' laboratories have been tested, and a long experimental activity has been carried on. In particular, the focus of the work has been the identification and separation of the iron losses, both hysteresis and eddy currents, from the contribution of the bearings. The corresponding torques have been calculated, and the energetic behaviors of the original machine with ferrites and the prototypes with phenolic bonded magnets have been analyzed. The satisfactory impact on the efficiency and the improvement of the output power of the motor with bonded magnets let possible to consider the analyzed solution as realistically adoptable.

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Section: ) For What It Concerns the Efficiency Value As Alreadymentioning

confidence: 99%

Impact of a Bonded-Magnet Adoption on a Specific Fractional Motor Power and Efficiency

Ferraris

Franchini

Pošković

et al. 2014

IEEE Trans. on Ind. Applicat.

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“…The rotor is made of a permanent magnet material, Neodymium Ferric Boron (NdFeB) and the magnets are usually surface mounted [4]. Unlike conventional motors, BLDC motors require rotor position sensing, which is done using the Hall effect sensors mounted on the stator surface [5].…”

Section: A Operation Of Bldc Motormentioning

confidence: 99%

“…The variation of L ds and L qs with θ e can be neglected with the use of non-salient pole machines, where L ds =L qs =L s [8] or with the use of high coercive PM material [4], [5]. As a result, the electromagnetic torque equation for BLDC motor is given by (9).…”

Section: A Proposed Dtc Techniquementioning

confidence: 99%

Direct Torque Control of matrix converter fed BLDC motor

Muthu

Kumaran

Rajaraman

et al. 2014

2014 IEEE 6th India International Conference on Power Electronics (IICPE)

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This paper proposes a two-phase conduction Direct Torque Control (DTC) scheme for three-phase Brushless DC (BLDC) Motor in the constant torque region. The use of Matrix Converter (MC) produces rectangular output currents, while maintaining sinusoidal input currents close to unity power factor. The implemented scheme reduces the torque dip in the BLDC motor. The merits of the matrix converter fed BLDC motor is shown by comparing the results with a conventional AC-DC-AC converter fed BLDC, both implementing two-phase conduction DTC. A model based on Matlab/Simulink is implemented to verify the above-proposed theory.

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“…OFT MAGNETIC COMPOSITE (SMC) CORES composed of magnetic particles coated by electrically insulating and non-magnetic material have advantages over traditional laminated steels used in electromagnetic machines such as motors and reactors [1], [2]: the former has lower eddy current losses and is adequate for forming 3D shapes [3]. It is experimentally shown that the macroscopic permeability and eddy current losses in SMC depend on the density, size and shape of the magnetic particles.…”

Section: Introductionmentioning

confidence: 99%

Computation of Macroscopic Electromagnetic Properties of Soft Magnetic Composite

Ito

Igarashi

2013

IEEE Trans. Magn.

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This paper presents a new numerical method to compute the macroscopic electromagnetic properties of the soft magnetic composite (SMC). In present method, SMC is assumed to be composed of homogeneous magnetic bricks with periodicity. The macroscopic electromagnetic properties of SMC are obtained using finite element method in which it is assumed that the homogenized energy is equal to that stored in a unit domain. We compare the macroscopic electromagnetic properties obtained by the present method with those obtained by Ollendorf's formula and magnetic circuit based on the nonmagnetic grain boundary model. It is shown that the three results are in good agreement when assuming constant permeability. It is also found that there are clear discrepancies among them due to magnetic saturations especially when the demagnetization coefficient is large.

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Brushless DC motor with a bonded permanent magnet and powder magnetic core

Cited by 12 publications

References 4 publications

Impact of a Bonded-Magnet Adoption on a Specific Fractional Motor Power and Efficiency

Impact of a Bonded-Magnet Adoption on a Specific Fractional Motor Power and Efficiency

Direct Torque Control of matrix converter fed BLDC motor

Computation of Macroscopic Electromagnetic Properties of Soft Magnetic Composite

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