Modeling and Mitigation of Rotor Eddy-Current Losses in High-Speed Solid-Rotor Induction Machines by a Virtual Permanent Magnet Harmonic Machine

Di, Chong; Petrov, Ilya; Pyrhönen, Juha

doi:10.1109/tmag.2018.2873279

Cited by 22 publications

(15 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, this paper conducts the loss analysis through the co-simulation between the SiC inverter (Power SIM software) and the IPMSM (J-MAG software) to consider the interaction of them. It is obvious that the simulation results are reliable in the comparison and analysis [30][31][32].…”

Section: Loss Analysis Of Propulsion Systemmentioning

confidence: 90%

“…In the efficiency analysis, the efficiencies of SiC inverter and PMSM are calculated through the co-simulation of SiC inverter (PSIM software, Powersim Inc., Rockville, MD, USA) and PMSM (J-MAG software, JSOL Corporation, Tokyo, Japan) to consider the interaction of them. Simulation results are based on the determination of the switching frequency of SiC inverter [30][31][32]. Based on the power loss curve of the propulsion system, the switching frequency with highest efficiency can be determined for propulsion inverter.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Switching Frequency Determination of SiC-Inverter for High Efficiency Propulsion System of Railway Vehicle

Ryu

Lee

2020

Energies

View full text Add to dashboard Cite

This paper suggests the reasonable switching frequency determination method for achieving highest efficiency of the railway propulsion system consisting the silicon carbide (SiC) inverter and permanent magnet synchronous motor (PMSM). The SiC power device allows increasing the switching frequency of the inverter because it has the small switching power loss. The total efficiency is taken into account for determining the switching frequency of SiC inverter in this paper. In the efficiency analysis of SiC inverter and PMSM, the PMSM drive control is considered with the hybrid switching method combined the synchronous PWM and asynchronous PWM. The result of the analysis shows the efficiency curve of propulsion system depending on the switching frequency. The switching frequency having the minimum power loss of propulsion system is selected based on the extracted power loss curve.

show abstract

Section: Loss Analysis Of Propulsion Systemmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Switching Frequency Determination of SiC-Inverter for High Efficiency Propulsion System of Railway Vehicle

Ryu

Lee

2020

Energies

View full text Add to dashboard Cite

show abstract

“…In this paper, a 2-pole, 2 MW, 12000 r/min high-speed IM with a solid rotor is investigated. The machine was optimized and reported in detail in [18]. The total solid-rotor eddycurrent losses are about 13.3 kW at the nominal load with a per-unit slip of about 0.005, both estimated by the 2-D FEM.…”

Section: Air-gap Flux Density Harmonic Analysis By the 2-d Fast Fmentioning

confidence: 99%

“…Recently, Di et al [18] proposed a virtual permanent magnetic harmonic machine (VPMHM) model for solving the rotor eddy-current harmonic losses. The method is capable of generating a particular sinusoidal harmonic required in the air gap by simultaneously taking into account both the saturation and rotor damping effect (the effects of the rotor flux on the air-gap flux).…”

Section: Introductionmentioning

confidence: 99%

“…However, there were two main drawbacks when the VPMHM model was originally presented; one is related to the excitation on the virtual magnet and the other to the rotor permeability. To be more specific, a much lower flux density compared with the required flux density is generated in the air gap when a certain flux density harmonic is produced by the corresponding magnet excitation, as shown in [18,Fig. 2].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Extraction of Rotor Eddy-Current Harmonic Losses in High-Speed Solid-Rotor Induction Machines by an Improved Virtual Permanent Magnet Harmonic Machine Model

Petrov

Pyrhönen

2019

IEEE Access

Self Cite

View full text Add to dashboard Cite

High-speed induction machines equipped with a solid steel rotor are capable of achieving a high-rotating speed than other types of machines, because of their simpler and more robust rotor structure. At the same time, however, the eddy-current losses in the solid rotor may be critical, because of the high conductivity of the rotor material, which makes it easy for axial eddy currents to travel in the solid rotor. To efficiently mitigate the rotor eddy-current losses, it is important to accurately determine the rotor eddycurrent losses induced by a particular harmonic in advance. In this paper, an improved virtual permanent magnet harmonic machine (VPMHM) model equipped with a sinusoidally magnetized virtual magnet based on the finite element method (FEM) is proposed for determination of the rotor eddy-current harmonic losses. The 2-D fast Fourier transform was used to accurately analyze the time-spatial air-gap flux density harmonics. The VPMHM model was enhanced to ensure that it was able to exactly produce the required flux density harmonics in the air gap. Two algorithms for the improved VPMHM models with different hybrid excitations were proposed to determine the harmonic losses together with the other important harmonic behavior. The model was further investigated to separate the electromagnetic transients from different harmonics. Finally, the simulation time for the harmonic losses required by the enhanced VPMHM model was significantly reduced by separating the harmonic transients. All the results and conclusions presented in this paper are based on the FEM analysis. INDEX TERMS Solid-rotor high-speed induction machine (IM), finite element method (FEM), 2-D fast Fourier transform, eddy-current losses, improved virtual permanent magnet harmonic machine (VPMHM).

show abstract

Calculation and Decrease of Zigzag Leakage Flux Losses in a Wet Submersible Induction Machine by the Virtual Permanent Magnet Harmonic Machine Model

Yan

Bao

2022

IEEJ Transactions Elec Engng

Self Cite

View full text Add to dashboard Cite

The accurate estimation of the zigzag leakage flux losses (ZZLFL) caused by the slot harmonics and their interactions, which occupy a high proportion of stray losses, are of great significance in the efficiency calculation as well as the optimization design for the wet submersible induction machine (WSIM). In this paper, a two-dimensional finite element method (FEM) is presented to separate ZZLFL into the iron losses and the eddy-current losses. The air-gap magnetic flux density is decomposed by the two-dimensional fast Fourier transform at a sampling frequency of 5000 Hz. The hybrid excited virtual permanent magnet harmonic machine model is applied to reconstruct the air-gap magnetic field and excite the stator and rotor separately. Each node harmonic iron losses are acquired through the modified Bertotti iron losses model with the consideration of high-frequency power losses as a function of the magnetic flux density. The zigzag flux losses provided by different harmonics are obtained by subtracting the hybrid excitation losses. According to the different proportions of harmonic losses among zigzag flux losses, novel WSIM models are proposed in the paper to decrease zigzag flux losses and increase the efficiency. Adopting the same computation process, the novel models with different structures are explored and verified to improve the zigzag flux losses and power density.

show abstract

Modeling and Mitigation of Rotor Eddy-Current Losses in High-Speed Solid-Rotor Induction Machines by a Virtual Permanent Magnet Harmonic Machine

Cited by 22 publications

References 24 publications

Switching Frequency Determination of SiC-Inverter for High Efficiency Propulsion System of Railway Vehicle

Switching Frequency Determination of SiC-Inverter for High Efficiency Propulsion System of Railway Vehicle

Extraction of Rotor Eddy-Current Harmonic Losses in High-Speed Solid-Rotor Induction Machines by an Improved Virtual Permanent Magnet Harmonic Machine Model

Calculation and Decrease of Zigzag Leakage Flux Losses in a Wet Submersible Induction Machine by the Virtual Permanent Magnet Harmonic Machine Model

Contact Info

Product

Resources

About