Novel Winding and Core Design for Maximum Reduction of Harmonic Magnetomotive Force in AC Motors

Kocabaş, Derya Ahmet

doi:10.1109/tmag.2008.2005532

Cited by 46 publications

(22 citation statements)

References 7 publications

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“…By applying this solution to the particular SG analysed, the irregular damper bar pitch interacts with the stator open slot structure in such a way that the air-gap parasitic harmonics are reduced. Although the concept of having asymmetrical windings has been already implemented in asynchronous machines [30], such a methodology has not been applied to address losses and THD improvements in SGs.…”

Section: Modulated Damper Cage Optimizationmentioning

confidence: 99%

Improved Damper Cage Design for Salient-Pole Synchronous Generators

Nuzzo

Galea

Gerada

et al. 2017

IEEE Trans. Ind. Electron.

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Abstract-The benefits of implementing a damper winding in salient-pole, synchronous generators are widely known and well consolidated. It is also well known that such a winding incurs extra losses in the machine due to a number of reasons. In order to improve the overall efficiency and performance of classical salientpole, wound field, synchronous generators that employ the traditional damper cage, an improved amortisseur winding topology that reduces the inherent loss is proposed and investigated in this paper. This is essential in order to meet modern power quality requirements and to improve the overall performance of such 'classical' machines. The new topology addresses the requirements for lower loss components without compromising the acceptable values of the output voltage total harmonic distortion and achieves this by having a modulated damper bar pitch. As vessel for studying the proposed concept, a 4MVA, salient-pole, synchronous generator is considered. A finite element model of this machine is first built and then validated against experimental results. The validated model is then used to investigate the proposed concept with an optimal solution being achieved via the implementation of a genetic algorithm optimization tool. Finally, the performance of the optimised machine is compared to the original design both at steady state and transient operating conditions.

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Section: Modulated Damper Cage Optimizationmentioning

confidence: 99%

Improved Damper Cage Design for Salient-Pole Synchronous Generators

Nuzzo

Galea

Gerada

et al. 2017

IEEE Trans. Ind. Electron.

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“…Also, these motors are available for three-phase or single-phase supplies and also available in multiphase Nowadays open winding induction machines are more popular for drive applications [2,[9][10][11]. Even though the induction machine is less costly, most of its practical use is for limited types of load at constant speeds although multiphase concepts and advanced control schemes have recently also been proposed [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. In [27], an integrated converter for a 48 V micro/mid hybrid electric vehicle (HVE) was proposed.…”

Section: Introductionmentioning

confidence: 99%

Hardware Implementation and a New Adaptation in the Winding Scheme of Standard Three Phase Induction Machine to Utilize for Multifunctional Operation: A New Multifunctional Induction Machine

et al. 2017

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Abstract:In this article a new distinct winding scheme is articulated to utilize three phase induction machines for multifunctional operation. Because of their rugged construction and reduced maintenance induction machines are very popular and well-accepted for agricultural as well as industrial purposes. The proposed winding scheme is used in a three phase induction machine to utilize the machine for multifunctional operation. It can be used as a three-phase induction motor, welding transformer and phase converter. The proposed machine design also works as a single phase induction motor at the same time it works as a three-phase to single phase converter. This new design does not need any kind of special arrangement and can be constructed with small modifications to any standard three-phase induction motor. This modified induction machine is thoroughly tested to determine its efficiency and other parameters and also hardware implementation results are provided in the article, which validate the design and construction.

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“…For a distributed winding, the number of conductors is determined for each slot in a so-called graded winding [1]. Graded windings are improved by the introduction of a non-uniform slot distribution [5]. Each end coil side of one phase group in a distributed winding is interchanged with the corresponding coil side from the adjacent phase group, called an interspersed winding [6].…”

Section: Introductionmentioning

confidence: 99%

“…For rotor magnet blocks, several design techniques, each of which can selectively eliminate a harmonic component [2], [3], [9]- [13], are simultaneously employed to achieve harmonic rejection [9], [10], [12], [13]. In terms of the selective elimination of harmonics, the slot winding arrangement, such as that in which the slot winding is nonuniformly distributed [5], can be applied to stators with a small number of slots in combination with rotor magnet designs. This paper describes a stator design suited for the selective elimination of a harmonic component in the air-gap flux density distribution for reducing pulsating torque in surfacemounted PM synchronous motors.…”

Section: Introductionmentioning

confidence: 99%

“…The proposed stator design consists of an alternate arrangement of stator slots and coils and the introduction of dummy slots. The alternate slot winding scheme corresponds to the simplest arrangement of nonuniformly distributed slot windings [5] at 2 slots per pole per phase. An alternate arrangement of stator slots doubles the period in the spatial distribution of magnetic reluctance.…”

Section: Introductionmentioning

confidence: 99%

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Stator Design of Alternate Slot Winding for Reducing Torque Pulsation With Magnet Designs in Surface-Mounted Permanent Magnet Motors

Yokoi

Higuchi

2015

IEEE Trans. Magn.

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Abstract-This paper proposes a stator design that consists of a combination of an alternate slot winding and dummy slots to minimize pulsating torque in surface-mounted permanent magnet (PM) synchronous motors. The alternate arrangement of winding coils is designed to eliminate a harmonic component of back-EMF that gives rise to a harmonic component of pulsating torque. However, the non-uniform arrangement of slots decreases the frequency of the cogging torque by half and may aggravate torque pulsation. To compensate for the drawback or the decrease in the frequency of the cogging torque, dummy slots are introduced in the alternately slotted stator. A theoretical method is developed for the proposed stator combination. The proposed stator design is applied to a prototype in combination with other rotor magnet design techniques, such as magnet shifting and the adjustment of magnet width, to minimize pulsating torque. The results show that the designed motor reduces the ripple factor of the torque by approximately 30 % relative to the original value. In addition, the proposed alternate slot winding is validated by comparing the design with equal slot winding designs optimized through FEM analysis.

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Novel Winding and Core Design for Maximum Reduction of Harmonic Magnetomotive Force in AC Motors

Cited by 46 publications

References 7 publications

Improved Damper Cage Design for Salient-Pole Synchronous Generators

Improved Damper Cage Design for Salient-Pole Synchronous Generators

Hardware Implementation and a New Adaptation in the Winding Scheme of Standard Three Phase Induction Machine to Utilize for Multifunctional Operation: A New Multifunctional Induction Machine

Stator Design of Alternate Slot Winding for Reducing Torque Pulsation With Magnet Designs in Surface-Mounted Permanent Magnet Motors

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