Experimental and numerical evaluation of iron losses in a claw pole car generator

Gimeno, Anthony; Friedrich, Guy; Benkara, Khadija El Kadri

doi:10.1109/icelmach.2010.5608099

Cited by 8 publications

(8 citation statements)

References 8 publications

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“…Losses in the soft iron poles (sources i11, i12, and i17), the bearings (source i27), the fans (source i23), and the bridge rectifier (source i24, assuming a symmetrical rectifier) are added to the copper ones (see Fig. 3 and [2]). …”

Section: ) Inverse Nonlinear Parameter Identificationmentioning

confidence: 99%

“…2) Steady-State Rotating Machine: Results are obtained using input data provided by Gimeno et al [2]. We assume that losses are separately known and that conduction and free convection are already identified (see Section IV-A1).…”

Section: ) Steady-state Nonrotating Machinementioning

confidence: 99%

“…Recent research [2], [3] has experimentally quantified the total losses and numerically evaluated the ratio between iron 0093-9994 © 2013 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.…”

mentioning

confidence: 99%

“…This paper is situated in the continuity of such a study [2], [3], [6]- [9] by analyzing further the critical thermal parameters. Parallel papers [11] propose a general method to identify it versus global performances.…”

mentioning

confidence: 99%

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Thermal Modeling of a Claw-Pole Electrical Generator: Steady-State Computation and Identification of Free and Forced Convection Coefficients

Maloberti

Gimeno

Ospina

et al. 2014

IEEE Trans. on Ind. Applicat.

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The production of heat is a key characteristic of a machine's behavior. Heat sources come mainly from energy losses (electrical in copper, magnetic in iron, aerolic in fans, and mechanical in bearings). Temperature changes can be described owing to thermal conduction, convection, and radiation equations. To understand and design a machine, it is important to construct a dedicated model and to know every physical loss. The aim is therefore to build a static thermal model adapted to the simulation and sizing of claw-pole car alternators. Currently, in cars with internal combustion engines, generators rotors are wire wound, doubly excited with a dc concentrated winding and small permanent magnets, and self-air-cooled with fans. This paper proposes a nodal model with 16 nodes, taking all the heat transfers and space directions into account. The thermal characterization of the machine is permitted by only four physical parameters, varying with the temperature T and the rotating velocity Ω, shown to be sufficient to deduce the model conductances. These properties are as follows: the thermal exchange coefficients due to free and forced convection into the air gap and the cavity, the thermal exchange coefficient due to free superficial convection at the external surface, and the thermal equivalent conductivity within the bearings. The consistency and usefulness of both the model and identifications are checked against numerical studies and measurements.Index Terms-Claw-pole alternator, free and forced convection coefficients, lumped thermal model, steady state, temperature prediction, thermal parameter identification.

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Section: ) Inverse Nonlinear Parameter Identificationmentioning

confidence: 99%

Section: ) Steady-state Nonrotating Machinementioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Thermal Modeling of a Claw-Pole Electrical Generator: Steady-State Computation and Identification of Free and Forced Convection Coefficients

Maloberti

Gimeno

Ospina

et al. 2014

IEEE Trans. on Ind. Applicat.

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“…The theoretical efficiency of a conventional car alternator is around 40 -60% [2][8] and until 70% for nowadays alternator [13]. Moreover, the alternator characteristics represented by its all maximum efficiencies at every excitation current and speed setting are presented in Fig.…”

Section: Experiments and Analysis Of Car Alternator For Wind Turbine Amentioning

confidence: 99%

Experiment and Analysis of Car Alternator for Wind Turbine Application

Irasari¹

2012

J. Mechatron. Electr. Power Veh. Technol.

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AbstrakMakalah ini membahas eksperimen dan analisis untuk mengetahui kelayakan alternator mobil sebagai generator turbin angin. Eksperimen dilakukan dua kali. Eksperimen pertama adalah karakterisasi alternator untuk menentukan rasio transmisi mekanik. Dalam eksperimen ini alternator diputar oleh mesin bubut dan daya keluarannya digunakan untuk mengisi baterai. Dalam eksperimen kedua, alternator diintegrasikan dengan baling-baling dan mengujinya sebagai satu kesatuan sistem. Simulasi kecepatan angin dilakukan menggunakan terowongan angin. Dalam kedua eksperimen tersebut pembangkitan listrik alternator dilakukan dengan metoda fixed excitation current. Korelasi antara karakteristik alternator dengan tip speed ratio menghasilkan rasio transmisi mekanik sebesar 1 : 3. Hasil pengujian menunjukkan bahwa efisiensi alternator sekitar 50% dan cut-in wind speed (setelah perhitungan koreksi) adalah 6.35 m/s. Kata kunci: alternator, mobil, fixed excitation current, turbin angin. Abstract This paper discusses experiment and analysis to find out the feasibility of a car alternator to be used as a generator for wind turbine. The experiment was conducted twice. The first experiment was to characterize the alternator to determine the mechanical transmission ratio.In this experiment the alternator was driven by a lathe machine and its output power was supplied to charge a battery. In the second experiment the alternator was integrated with the turbine blades and they were tested as a unit system. In both experiments, the electric generation of alternator was executed with fixed excitation current method. The correlation between the alternator characteristic and the tip speed ratio gives the mechanical transmission ratio of 1 : 3. The experiment results show that the efficiency of alternator is around 50% and cut-in wind speed (after correction) is 6.35 m/s indicating that alternator is not feasible for wind turbine system application.

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Improved performance of integrated generator systems with claw pole alternator for aircraft applications

Arumugam

Logamani

Karuppiah

2017

Energy

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Experimental and numerical evaluation of iron losses in a claw pole car generator

Cited by 8 publications

References 8 publications

Thermal Modeling of a Claw-Pole Electrical Generator: Steady-State Computation and Identification of Free and Forced Convection Coefficients

Thermal Modeling of a Claw-Pole Electrical Generator: Steady-State Computation and Identification of Free and Forced Convection Coefficients

Experiment and Analysis of Car Alternator for Wind Turbine Application

Improved performance of integrated generator systems with claw pole alternator for aircraft applications

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