Reducing Harmonic Eddy-Current Losses in the Stator Teeth of Interior Permanent Magnet Synchronous Machines During Flux Weakening

Han, Sang Seop; Soong, Wen L.; Jahns, T.M.; Guven, M.K.; Illindala, Mahesh S.

doi:10.1109/tec.2009.2033195

Cited by 48 publications

(27 citation statements)

References 15 publications

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“…Thus, the IEM-Formula model is adopted with a resistance model that considers harmonic loss. Harmonic loss is investigated through the air-gap magnetic field density harmonics from the elemental component and the machine's equivalent circuit parameters (shown in Figure 2), based on the air-gap field density analysis in [10,23,24]. Therefore, the iron loss decreases in a similar manner during FWOT.…”

Section: Analytical Concept Of the Iron Loss Model With Harmonic Lossmentioning

confidence: 99%

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Iron Loss Prediction Using Modified IEM-Formula during the Field Weakening for Permanent Magnet Synchronous Machines

2017

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During field weakening operation time (FWOT), the total iron loss rises and affects the accuracy of loss prediction and efficiency, especially if a large range of FWOT exists due to a large voltage drop that was rooted from the resistance of the used material. Iron loss prediction is widely employed in investigations for a fast electrical machine analysis using 2D finite element analysis (FEA). This paper proposes harmonic loss analytically by a steady-state equivalent circuit with a novel procedure. Consideration of skin effects and iron saturation are utilized in order to examine the accuracy through the relative error distribution in the frequency domain of each model from 50 to 700 Hz. Additionally, this comparative study presents a torque-frequency-field density calculation over each single term of the modified institute of electrical machines formula (IEM-Formula). The proposed analytical calculation is performed using 2D FEA for a classic and modified IEM-Formula along with experimental verifications on a surface-mounted permanent magnet synchronous generator (PMSG) for a wind generation application.

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Section: Analytical Concept Of the Iron Loss Model With Harmonic Lossmentioning

confidence: 99%

“…In [10], Han et al reported the influence of harmonic losses to increase and dominate the total iron loss during field weakening operation. A useful comparative study on the produced harmonics and eddy-current loss (in the stator-teeth) is presented.…”

Section: Introductionmentioning

confidence: 99%

Iron Loss Prediction Using Modified IEM-Formula during the Field Weakening for Permanent Magnet Synchronous Machines

2017

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“…In other words, it takes full advantage of electric torque with minimum copper loss, then acquires a high speed by sacrificing torque performance in the flux weakening region within safety boundaries [2,5]. The control references are derived by computing the intersection of the constant torque line and the voltage constraint locus [6][7][8]. Dating back to the 1990s, in [8,9], the operation region of a motor has already been divided by precalculating the current reference for each region and pre-settling the speed reference for operation interval switching.…”

Section: Introductionmentioning

confidence: 99%

A Novel Optimal Current Trajectory Control Strategy of IPMSM Considering the Cross Saturation Effects

Gao

Huang

et al. 2017

Energies

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Abstract:The nonlinearity and uncertain variation of machine parameters are always caused by cross coupling and magnetic saturation effects, which are easily neglected in the conventional control strategy. In this paper, a current trajectory control strategy (CTCS) is proposed to take the cross coupling and magnetic saturation effects into account under voltage and current constraints. It can be considered as a calculating method considering parameter variation and separating among each iteration step which treats the calculated result of the former step as the initial value of the next step. At first, the torque command is translated into the current reference. Then, the increments between the target value and real value of the torque and the voltage are respectively calculated, which are subsequently converted into the current modification vector in di d , di q framework for further analysis. In order to take the influence caused by cross coupling and magnetic saturation effects on the CTCS into consideration, self and mutual inductances are analyzed by finite element analysis (FEA). The results of the simulation and experiment show that the rapid response and robustness on reference speed variation could be achieved by employing the proposed CTCS, and the seamless switching between the constant torque and flux-weakening operation can also be realized.

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“…References [1][2][3][4] describe the analytical procedure for the estimation of stator iron loss under field-weakening operation with different areas of emphasis. References [1,4] developed a simplified stator teeth eddy-current loss index and used it in a numerical optimization procedure to minimize the stator teeth eddy-current loss under shortcircuit conditions (deep field weakening).…”

Section: Introductionmentioning

confidence: 99%

“…References [1,4] developed a simplified stator teeth eddy-current loss index and used it in a numerical optimization procedure to minimize the stator teeth eddy-current loss under shortcircuit conditions (deep field weakening). Reference [2] provides an analytical procedure for the stator teeth eddycurrent loss including the effect of the current phase angle and the rotor parameters.…”

Section: Introductionmentioning

confidence: 99%

Analysis of stator iron loss in interior PM machines under open and short-circuit conditions

Tang

Soong

Liew

et al. 2013

2013 IEEE Energy Conversion Congress and Exposition

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This paper describes an analytical approach for calculating the stator iron loss for multiple-barrier interior permanent magnet (IPM) machines with distributed windings, under open and short-circuit (deep field-weakening) conditions. It is based on using a lumped equivalent-circuit model to predict the rotor mmf and then the harmonic components of the airgap flux density. A "filter function" approach is used to calculate the stator tooth and yoke flux densities and hence iron loss components. It provides an insightful means for visualizing the effect of stator and rotor design changes on the stator iron losses. The analytical stator iron loss predictions for four IPM machine configurations are compared with finite element results.

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Reducing Harmonic Eddy-Current Losses in the Stator Teeth of Interior Permanent Magnet Synchronous Machines During Flux Weakening

Cited by 48 publications

References 15 publications

Iron Loss Prediction Using Modified IEM-Formula during the Field Weakening for Permanent Magnet Synchronous Machines

Iron Loss Prediction Using Modified IEM-Formula during the Field Weakening for Permanent Magnet Synchronous Machines

A Novel Optimal Current Trajectory Control Strategy of IPMSM Considering the Cross Saturation Effects

Analysis of stator iron loss in interior PM machines under open and short-circuit conditions

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