Extension of a d-q model of a permanent magnet excited synchronous machine by including saturation, cross-coupling and slotting effects

Herold, Thomas; Franck, David; Lange, Enno de; Hameyer, Kay

doi:10.1109/iemdc.2011.5994804

Cited by 49 publications

(22 citation statements)

References 5 publications

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“…In order to evaluate the proposed methodology a permanent-magnet synchronous machine (PMSM) with buried magnets in the rotor and a rated power of 42.5 kW is studied ( Finken et al, 2010). The electrical machine is modelled in a rotor-flux-fixed dq-reference frame including cross coupling magnetization and saturation ( Herold et al, 2011)…”

Section: Methodsmentioning

confidence: 99%

Influence of non-linear frequency-dependent material properties on the operation of rotating electrical machines

Ruf

Steentjes

Franck

et al. 2015

COMPEL

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Purpose -The purpose of this paper is to focus on the frequency-dependent non-linear magnetization behaviour of the soft magnetic material, which influences both the energy loss and the performance of the electrical machine. The applied approach is based on measured material characteristics for various frequencies and magnetic flux densities. These are varied during the simulation according to the operational conditions of the rotating electrical machine. Therewith, the fault being committed neglecting the frequency-dependent magnetization behaviour of the magnetic material is examined in detail. Design/methodology/approach -The influence of non-linear frequency-dependent material properties is studied by variation of the frequency-dependent magnetization characteristics. Two different non-oriented electrical steel grades having the same nominal losses at 1.5 T and 50 Hz, but different thickness, classified as M330-35A and M330-50A are studied in detail. Both have slightly different magnetization and loss behaviour.Findings -This analysis corroborates that it is important to consider the frequency-dependency and saturation behaviour of the ferromagnetic material as well as its magnetic utilization when simulating electrical machines, i.e., its performance. The necessity to change the magnetization curve according to the applied frequency for the calculation of operating points depends on the applied material and the frequency range. Using materials, whose magnetization behaviour is marginally affected by frequency, causes a deviation in the flux-linkage and the electromagnetic torque in a small frequency range. However, analysing larger frequency ranges, the frequency behaviour of the material cannot be neglected. For instance, a poorer magnetizability requires a higher quadrature current to keep the same torque leading to increased copper losses. In addition, the applied iron-loss model plays a central role, since changes in magnetization behaviour with frequency lead to changes in the iron losses. In order to study the impact, the iron-loss model has to be capable to incorporate the harmonic content, because particularly the field harmonics are influenced by the shape of the magnetization curve. Originality/value -This paper gives a close insight on the way the frequency-dependent non-linear magnetization behaviour affects the energy loss and the performance of electrical machines. Therewith measures to tackle this could be derived.

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Section: Methodsmentioning

confidence: 99%

Influence of non-linear frequency-dependent material properties on the operation of rotating electrical machines

Ruf

Steentjes

Franck

et al. 2015

COMPEL

Self Cite

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“…Obviously, to consider the cross coupling, at least one matrix has to be constructed compared to the current-flux linkage approach. To ideally decouple the PM generated flux linkage from the current related components, the saturation level of the magnetic material in each element of the FEA model at each operation point should be frozen, as presented in [21], [22].…”

Section: B Synchronous Motorsmentioning

confidence: 99%

Modeling and Analysis of Electric Motors: State-of-the-Art Review

Bilgin

Liang

Terzić

et al. 2019

IEEE Trans. Transp. Electrific.

101

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This paper presents a comprehensive state-ofthe-art review of the modeling and analysis methods for the multidisciplinary design of electric motors for various applications including vehicular power and propulsion systems and electrified powertrains. It covers the important aspects of different engineering domains such as dynamic modeling, loss calculations, demagnetization analysis, thermal modeling, acoustic noise and vibration analysis, and mechanical stress modeling. The paper intends to guide the electric motor designers through examples and results on how to apply different analysis techniques on electric motors.

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“…The shaft model's rotational speed output turb is fed into the generator model along with the current drawn Ig from the rectifier. The generator is modelled in the dq rotating reference frame using the following equations [14]…”

Section: Generatormentioning

confidence: 99%

“…The voltages are converted from the dq reference frame to the 3-phase stationary coordinate system, and the output voltage amplitude, VgRMS, is calculated and output to the rectifier. The electromagnetic torque from the generator is calculated by [14] = 1.5 (4) and is used in (1) to calculate the rotational speed of the shaft, turb.…”

Section: Generatormentioning

confidence: 99%

Modeling and simulation of a pico-hydropower off-grid network

Williamson¹,

Griffo

Stark

et al. 2017

Modeling and Dynamic Behaviour of Hydropower Plants

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This chapter will cover the system arrangement, modelling and control of such a system, with implementation of simulated example and expansion of the concept to include solar PV and wind turbine sources. 1.2. System Overview The proposed pico-hydropower off-grid network is built up from a number of identical picohydropower generator units, with one or more installed at each turbine site dependent on the environmental conditions. As each site may have different environmental conditions, each unit may have different power available at the turbine, which may vary over time. The generator is interfaced onto the AC network through a power electronic AC-DC-AC interface, which allows a distributed grid, shown in Fig. 2. There is no communication between each unit, increasing the system reliability, so each unit must use local measurements to control the generator unit. This topology provides flexibility and redundancy in the network, making it suitable for a scalable and expandable system.

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Extension of a d-q model of a permanent magnet excited synchronous machine by including saturation, cross-coupling and slotting effects

Cited by 49 publications

References 5 publications

Influence of non-linear frequency-dependent material properties on the operation of rotating electrical machines

Influence of non-linear frequency-dependent material properties on the operation of rotating electrical machines

Modeling and Analysis of Electric Motors: State-of-the-Art Review

Modeling and simulation of a pico-hydropower off-grid network

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