Review of Variable-flux Permanent Magnet Machines

Owen, R.L.; Zhu, Z.Q.; Wang, Jiabin; Stone, D.A.; Urquhart, I.

doi:10.11142/jicems.2012.1.1.023

Cited by 9 publications

(5 citation statements)

References 36 publications

(51 reference statements)

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“…8 the influence of the compensation technique. Theoretical curves of normalized output power PDC / Pmax as function of normalized speed N / Nb with and without compensation capacitor are depicted according to, respectively (3) and (10). It clearly shows that the gain in power is substantial with an increase up to 100% (in theory the gain should be infinite if no dissipative components are taken into account in the model).…”

Section: IIImentioning

confidence: 97%

“…In the next section are presented the experimental bench and a first-order model. As mentioned in the introduction and overview, the HEFSPM machine is classified into variable-flux topology with parallel flux path [9] [10]. This topology associated with a diode-bridge rectifier (DBR) does behave like a classical wound-field synchronous machine; i. e applying a DC current in the field winding allows tuning the output voltage level.…”

Section: IIImentioning

confidence: 99%

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Improved output power capability of Hybrid Excited Flux-Switching DC-Alternators: Analysis and experiments

Gaussens

Hoang

Manfè³

et al. 2012

2012 IEEE International Conference on Industrial Technology

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In this paper, performance evaluation of a Hybrid Excited Flux-Switching Permanent Magnet (HEFSPM) DC generator is presented. The application principle of a DC controlled bus over a wide speed range will be firstly detailed. The main idea of such machine topology is that all the active parts are located in the stator so that the air-gap flux can be easily controlled with no need of brushes. This scheme uses a low-cost diode bridge rectifier directly connected to the HEFSPM Generator to transfer active power to the battery and the load. By means of Finite Element Analysis (FEA), a simple methodology was developed to determine the power capability of the proposed structure. The influence of the BH magnetization curve will be also explored. Experimental results on a 3kW -24-Slot 20-Pole HEFSPM DC Generator were performed and compared to the previous analysis. This relative low time-consuming approach could be useful to predict, with good agreement, the power capability of hybrid excited generator. Finally, an original compensation technique to improve performance of the generator is discussed. An analytical approach to predict the impact of series capacitor on the power capability is proposed and then validated by experiments. It is demonstrated that low speed power capability can be enhanced by 2.5 times using this technique.

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Section: IIImentioning

confidence: 97%

Section: IIImentioning

confidence: 99%

Improved output power capability of Hybrid Excited Flux-Switching DC-Alternators: Analysis and experiments

Gaussens

Hoang

Manfè³

et al. 2012

2012 IEEE International Conference on Industrial Technology

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“…Literature is available on different types of hybrid excitation machines with varying topologies [8–15]. A double‐rotor hybrid permanent magnet generator has been developed for a series hybrid electric vehicle power train [16].…”

Section: Introductionmentioning

confidence: 99%

Wide regulated series hybrid excitation alternator

Mudhigollam¹,

Choudhury²,

Hatua

2018

IET Electric Power Applications

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Parallel hybrid excitation alternators (PHEAs) are large in size but offers wide flux regulation capability. Series hybrid excitation alternator has limited flux regulation capability but compact compared to PHEAs. A new rotor excitation topology has been proposed for a series hybrid rotor excitation alternator (SHREA). The proposed machine is not only small in size but also have wide flux regulation capability. The proposed machine can be classified as a series hybrid machine as permanent magnets and field windings are arranged in a single rotor ensuring series addition of permanent magnet flux and field winding flux. In this study, one more rotor configuration for quick maintenance SHREA is also proposed. As the name suggests, for any fault in excitation winding, they can be easily replaced. Two 1.3 kW prototypes with such designs have been validated with finiteelement method simulation and hardware testing. (a) Voltage and current waveforms. (Ch1) Line-to-line voltage (100 V/div). (Ch2) Line current (10 A/div). Time = 5 ms/div, (b) Comparison of terminal characteristics

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“…HESMs may be classified depending on their magnetic flux paths or on the location of the permanent magnets and electrical excitation coils (rotor or stator) [4]. Flux paths of the magnets and coils may be in series or in parallel with each other.…”

Section: Introductionmentioning

confidence: 99%

“…Many different configurations have been proposed and it is still open to improvements. Therefore there are many different structures proposed in the literature for parallel HESMs [4–7]. Two‐rotor, single‐stator axial flux synchronous PM machines use both sides of the stator core and therefore the power density of the machines are greater than many radial flux machines [8].…”

Section: Introductionmentioning

confidence: 99%

Comparative study of new axial field permanent magnet hybrid excitation machines

Yıldırız¹,

Onbilgin²

2017

IET Electric Power Applications

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Hybrid excitation synchronous machines (HESMs) are permanent magnet machines which allow the control of the air-gap flux density. In this study, three new axial field HESM structures, each having two rotors and one stator, are proposed. The operation principles of these machines, considering weakening or supporting the air-gap flux density, are described. The magnetostatic and transient analyses of the proposed models have been carried out by using finite element method. To have reliable analysis results, the stator length and input and output diameters of the models have been chosen to be identical. Results are compared in terms of efficiency, power density and range of flux control between each other and another axial field HESM in the literature. In conclusion, the proposed HESM models demonstrate satisfactory performance for the generator mode and they are suitable for wind energy applications. Furthermore, because of their field weakening operation ability they can be used as motors in the vehicle industry.

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Review of Variable-flux Permanent Magnet Machines

Cited by 9 publications

References 36 publications

Improved output power capability of Hybrid Excited Flux-Switching DC-Alternators: Analysis and experiments

Improved output power capability of Hybrid Excited Flux-Switching DC-Alternators: Analysis and experiments

Wide regulated series hybrid excitation alternator

Comparative study of new axial field permanent magnet hybrid excitation machines

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