A Multisliced Finite-Element Model for Induction Machines Incorporating Interbar Current

Dorrell, David G.; Holik, P.J.; Lombard, Patrick; Thougaard, H.-J.; Jensen, F. T.

doi:10.1109/tia.2008.2009484

Cited by 36 publications

(23 citation statements)

References 10 publications

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“…In [42] FEA was used to calculate it using multiple axial slices with a connecting circuitry. This is illustrated in Fig.…”

Section: Inter-bar Current Modelling Using Feamentioning

confidence: 99%

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A Review of the Methods for Improving the Efficiency of Drive Motors to Meet IE4 Efficiency Standards

Dorrell¹

2014

Journal of Power Electronics

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High efficiency standards are slowly being introduced with IE3 efficiency levels shortly becoming compulsory in many countries; IE4 efficiency levels being developed for future implementation. In this paper a review is carried out of the IE 60034-30 standard which covers standard line-start induction motors. Some design techniques that can be used to increase efficiency in order to meet the IE4 standards are discussed. This standard is now being replaced by the IE60034-30-1 standard which extends to other line start motors and also IE 60034-30-2 is being introduced to cover variable speed drives in order to address developing technology. The conclusion is that IE4 standards are obtainable but careful design is needed to reach this. Examples from the literature are given.

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“…In [42] FEA was used to calculate it using multiple axial slices with a connecting circuitry. This is illustrated in Fig.…”

Section: Inter-bar Current Modelling Using Feamentioning

confidence: 99%

“…It can be seen the rotor is rotated slightly to represent skew. This is for a 3 slice model but up to 9 were used in [42]. While the net torque on the rotor is positive, further analysis on each slice illustrates that some may have negative torque rather than positive.…”

Section: Inter-bar Current Modelling Using Feamentioning

confidence: 99%

A Review of the Methods for Improving the Efficiency of Drive Motors to Meet IE4 Efficiency Standards

Dorrell¹

2014

Journal of Power Electronics

Self Cite

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“…However, this accuracy depends strongly on the parameters of the material models and the manufacturing processes of both the materials and the machine. The computation of the resistive losses is nowadays very accurate and the only problems related to these losses reside in the effect of circulating current in parallel wires of the random windings (Hämäläinen et al 2013), skin effect in form windings (Islam and Arkkio 2009), and the interbar currents in the case of cage induction machine (Dorrell et al 2009). On the other hand, the i r o n l o s s e s , w h i c h a c c o u n t f o r u p t o h a l f o f t h e t o t a l l o s s e s , a r e s t i l l a s u b j e c t o f e x t e n s i v e investigations and the accuracy of the computed iron losses varies heavily from one author to the other.…”

Section: Introductionmentioning

confidence: 99%

Uncertainty propagation of iron loss from characterization measurements to computation of electrical machines

Belahcen

Rasilo

Nguyen

et al. 2015

COMPEL

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Uncertainty Propagation of Iron Loss from Characterization Measurements to Computation of Electrical MachinesAbstract-This paper presents the uncertainty propagation of iron losses from the material characterization measurements to the computed losses in an induction machine. The iron losses are modelled with an analytical loss model applied locally in finite element simulation. The uncertainty is taken into account by the decomposition into Polynomial Chaos Expansion, i.e., the spectral approach.The results of the simulations show that uncertainties in the measured losses propagate in different ways and to different parts of the machine depending on the measurement frequency and the nature of losses, i.e., hysteresis, eddy current or excess losses. The computations also show that the measurement uncertainties at low frequencies have negligible effect on the accuracy of computed losses whereas those at the supply frequency and higher ones affect very much this accuracy. It is also shown that the most important loss components are those related to the classical eddy current and alternating hysteresis losses especially in the tooth tips of the stator and rotor. The results suggest that more attention should be paid to the measurement and characterization of these sensitive components.

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“…An improved 2-D multi-slice FEM was proposed in refs. [11,12], taking into account the transverse current between rotor bars, as well as the influence of these currents on the motor losses. However, the validity of the model still needs to be verified.…”

Section: Introductionmentioning

confidence: 99%

Time-stepping finite element analysis on the influence of skewed rotors and different skew angles on the losses of squirrel cage asynchronous motors

Zhao

Liu

Luo

et al. 2011

Sci. China Technol. Sci.

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To study the influence of skewed rotors and different skew angles on the losses of squirrel cage asynchronous motors, a 5.5-kW motor was taken as an example and the multi-sliced field-circuit coupled time stepping finite element method (T-S FEM) was used to analyze the axially non-uniform fundamental and harmonic field distribution characteristics at typical locations in the stator and rotor cores. The major conclusions are: firstly the skewed rotor exhibits a decrease in the harmonic copper losses caused by slot harmonic currents in the stator winding and rotor bars. Secondly, the skewed rotor shifts the non-uniform distribution of field in the axial direction, which leads to more severe saturation and an increase in iron losses. The heavier the load, the more pronounced the increase in iron losses. Furthermore, the influences of different skew angles on motor losses are studied systematically, with skew angles from 0.5 to 1.5 stator tooth pitch. It is found that the lowest total loss occurs at 0.8 stator tooth pitch, and the slot harmonics can be decreased effectively. squirrel cage asynchronous motors, skewed rotors, losses, time-stepping finite element method (T-S FEM) Citation:Zhao H S, Liu X F, Luo Y L, et al. Time-stepping finite element analysis on the influence of skewed rotors and different skew angles on the losses of squirrel cage asynchronous motors.

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A Multisliced Finite-Element Model for Induction Machines Incorporating Interbar Current

Cited by 36 publications

References 10 publications

A Review of the Methods for Improving the Efficiency of Drive Motors to Meet IE4 Efficiency Standards

A Review of the Methods for Improving the Efficiency of Drive Motors to Meet IE4 Efficiency Standards

Uncertainty propagation of iron loss from characterization measurements to computation of electrical machines

Time-stepping finite element analysis on the influence of skewed rotors and different skew angles on the losses of squirrel cage asynchronous motors

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