Design of Rotating Electrical Machines

Pyrhönen, Juha; Jokinen, T.; Hrabovcová, Valéria

doi:10.1002/9781118701591

Cited by 726 publications

(839 citation statements)

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“…The lower φz results in higher eddy-current losses due to the distorted current waveforms. It should be mentioned that fundamental kR has been bounded by 1.15 which indicates that through a proper division and transportation of the conductors in the stator slots, the contribution of eddy-current losses can be more than 23% due to the distortion [8], [18]. Fig.…”

Section: The Eddy Currents Effectmentioning

confidence: 99%

“…Essentially, the kR factor is a function of the square of the frequency and normal to the slot leakage flux direction. Thus, the winding losses can be expressed as (18) where I2, and R are the stator winding current and the resistance of the winding. Additionally, when the current is distorted, a new resistance factor should be defined as follows (19) factor is function of the defined key parameters m-ratio and φz, on the operation point of the rectifier system that is derived by the eddy-currents.…”

Section: The Eddy Currents Effectmentioning

confidence: 99%

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Load identification of different Halbach-array topologies on permanent magnet synchronous generators using the coupled field-circuit FE methodology

Asef

Perpiñá

Barzegaran

et al. 2018

Electric Power Systems Research

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In this paper, the influence of gap consideration on load identification under various Halbach-array-based topologies (HABOs) is investigated while the system is on-duty. The load characteristics of a radial flux generator with closed-slots and the exterior rotor topology is discussed, where the effect of eddy-currents are observed. This comparative study deals with the consideration of the combined moment of inertia calculation that demonstrates how electromagnetic-based post processing calculations are estimated without the aid of nominal machine parameter values. The analysis was performed using a 2-D finite-element simulation of different HABOs with the gap consideration between the segments. Additionally, a comprehensive comparison with no gap is considered. Also, the dynamic analysis using an uncontrolled conventional rectifier model is used to derive effected key output parameters such as torque, output power, power factor, and line-to-line voltage. The major objective of the study is to determine corresponding load results in order to employ the most suitable and capable magnetization topology from the load perspective in the PM synchronous generator (PMSGs). Accordingly, the maximum power (MP) point was carried out to maximize the output DC power. With respect to the combined moment of inertia estimation, the load parameter estimation is verified experimentally on a surface-mounted PMSG using different magnetization topologies. Furthermore, commercial and environmental issues of the project are considered to reduce CO2 emissions as part of green power generation development.Peer ReviewedPostprint (author's final draft

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Section: The Eddy Currents Effectmentioning

confidence: 99%

Section: The Eddy Currents Effectmentioning

confidence: 99%

Load identification of different Halbach-array topologies on permanent magnet synchronous generators using the coupled field-circuit FE methodology

Asef

Perpiñá

Barzegaran

et al. 2018

Electric Power Systems Research

View full text Add to dashboard Cite

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“…Design parameters like diameter, axial length, reactances and the weight of the different parts of the generator are calculated using the analytical framework presented in [10]. Magnetic calculations are based on a magnetic equivalent circuit representation similar to the one given in [9].…”

Section: B Constraints and Limitationsmentioning

confidence: 99%

“…In order to estimate the temperature rise in the different parts of the generator, a thermal equivalent circuit network similar to the one presented in [9] was used. Design parameters like diameter, axial length, reactances and the weight of the different parts of the generator are calculated using the analytical framework presented in [10].…”

Section: B Constraints and Limitationsmentioning

confidence: 99%

Effects of lifting reactance requirements on the optimal design of converter-fed synchronous hydrogenerators

Engevik

Hestengen

Valavi

et al. 2017

2017 IEEE International Electric Machines and Drives Conference (IEMDC)

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Abstract-The maximum allowed per unit value of the synchronous reactance of a synchronous generator is normally decided by the grid codes in order to maintain the stability of the system. For the converter-fed synchronous hydrogenerator, the steady state stability can be maintained by the frequency converter. In this paper the constraint on the synchronous reactance is relaxed from 1.2 per unit to 2.0 per unit and then removed altogether. The cost of the active materials and the net present value of the cost of losses are calculated for each case and compared. Three different nominal frequencies are also used to find which one gives the lowest total cost. The total generator cost is reduced when the synchronous reactance is increased. The lowest cost of the 50 Hz designs are lower than the cost of the 25 and 75 Hz designs.

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“…The analytical design is based on magnetic reluctances equivalent circuit [7], [8], [9] -not presented here. Since the scooter should be integrated into a wheel, a maximal outer diameter was imposed: 220 mm.…”

Section: Design and Numerical Validation Of The Studied Pmsmmentioning

confidence: 99%

Study of Permanent Magnet Synchronous Machine Topologies for Electric Scooter Application

Fodorean

Szabó

2013

AEF

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Abstract. The paper deals with the study of the motorization for an electric scooter. The motivation of this study is firstly introduced. Next, the application is defined: it is intended to propose a pure electrical traction system for a light electric vehicle, meaning an electric scooter). A short description of the design will introduce the main parameters of the electrical drive system and three topologies of electrical machine will be evaluated. The optimization of the best suited variant will be made based on a gradient type optimization algorithm. Numerical computation, by means of finite element method, will confirm the analytical obtained results, emphasizing the main achievements, performances and drawbacks of the electrical traction system. These performances are evaluated on test bench for validation.

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Design of Rotating Electrical Machines

Cited by 726 publications

References 0 publications

Load identification of different Halbach-array topologies on permanent magnet synchronous generators using the coupled field-circuit FE methodology

Load identification of different Halbach-array topologies on permanent magnet synchronous generators using the coupled field-circuit FE methodology

Effects of lifting reactance requirements on the optimal design of converter-fed synchronous hydrogenerators

Study of Permanent Magnet Synchronous Machine Topologies for Electric Scooter Application

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