Iron Loss Characteristics Evaluation Using a High-Frequency GaN Inverter Excitation

Martínez, Wilmar; Odawara, Shunya; Fujisaki, Keisuke

doi:10.1109/tmag.2017.2712683

Cited by 34 publications

(15 citation statements)

References 18 publications

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“…15. Similar decreases with frequency have been demonstrated in [15]- [17]. They are commonly explained by decreasing eddycurrent losses due to the skin effect.…”

Section: Iron Loss Characterizationsupporting

confidence: 80%

“…However, the following increase in iron losses beyond a certain frequency has been more sparsely discussed. The authors of [17] make a similar observation and mention increasing deadtime as one possible reason. The same explanation can be excluded in this study due to perfectly sinusoidal waveforms as discussed in Section V. However, the hysteresis losses have been reported to increase due to: a) the increasingly non-uniform flux density distribution with frequency itself [49]; b) the increasing amount of magnetic flux passing through deteriorated regions due to the field displacement towards lamination surfaces [19]- [22].…”

Section: Iron Loss Characterizationmentioning

confidence: 56%

“…Manufacturers often provide Epstein frame loss data up to 10 kHz on request, but little is known about iron losses in SiFe steel at higher frequencies. The few available studies [15]- [17] conclude that classical analytical iron loss approaches become increasingly inaccurate with frequency due to skin effect. No useful study regarding the impact of lamination thickness on iron losses in SiFe steel beyond 10 kHz could be found in the literature today.…”

Section: Introductionmentioning

confidence: 99%

“…Conventional iron loss measurement techniques such as the Epstein-frame and the ring-core methods, require complex hardware and waveform control beyond a few kHz [17], [18]. Further, their neglect of complex field patterns and material deterioration due to manufacturing influences such as cutting, stacking and welding [19]- [22] limits the usefulness of such results.…”

Section: Introductionmentioning

confidence: 99%

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High-Frequency Characterization of Losses in Fully Assembled Stators of Slotless PM Motors

Millinger

Wallmark

Soulard

2018

IEEE Trans. on Ind. Applicat.

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PostprintThis is the accepted version of a paper published in IEEE transactions on industry applications. This paper has been peer-reviewed but does not include the final publisher proof-corrections or journal pagination. IEEE transactions on industry applicationsAccess to the published version may require subscription. N.B. When citing this work, cite the original published paper. © © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. Abstract-The recent emerge of wide band-gap (WBG) power transistors enables higher switching frequencies in electrical motor drives. Their full utilization from a system point of view requires quantification of the corresponding time-harmonic motor losses. As an initial step, this paper presents a unique study of stator losses for three different commercially available non-oriented silicon-iron (SiFe) steel grades (with lamination thicknesses 0.1, 0.2 and 0.3 mm). The investigations cover a wide frequency range (10-100 kHz) at different levels of DC-bias (up to 1.6 T). Iron losses are identified from measurements on fully assembled stators, deploying a novel technique. By utilizing fully assembled stators, no additional samples are required. Manufacturing influence is inherently incorporated. Results show that measured iron losses are twice as high at 10 kHz compared to Epstein test results, which emphasizes the need to incorporate manufacturing influence on iron losses at high frequencies. The level of DC-bias is also observed to have a significant impact on iron losses (up to 30 %). Even though thinner laminations are known for reducing iron losses, the reduction is much lower than anticipated in the studied frequency range due to skin effect. Using 0.1 mm lamination gauge instead of 0.3 mm reduces losses by 50 % at 10 kHz, while the same substitution at 100 kHz only reduces losses by 30 %. Future work includes loss separation in complete converter-fed machines.

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“…15. Similar decreases with frequency have been demonstrated in [15]- [17]. They are commonly explained by decreasing eddycurrent losses due to the skin effect.…”

Section: Iron Loss Characterizationsupporting

confidence: 80%

Section: Iron Loss Characterizationmentioning

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High-Frequency Characterization of Losses in Fully Assembled Stators of Slotless PM Motors

Millinger

Wallmark

Soulard

2018

IEEE Trans. on Ind. Applicat.

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“…Also, it generates an unwanted shaft voltage and bearing currents (which induce excessive motor heating, audible noise, vibration, and common mode current) through parasitic capacitance and inductance inside the motor. As a consequence, an efficient system operation cannot be achieved due to its maintenance cost as well as a decrease of lifetime [11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Analysis and Design of a Sine Wave Filter for GaN-Based Low-Voltage Variable Frequency Drives

Baek

Choi

et al. 2020

Electronics

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Gallium nitride (GaN) devices have been widely adopted to achieve high efficiency and high power density as alternative solutions to silicon devices. When the GaN power devices are used for variable frequency drive (VFD) systems, the high dv/dt pulses at the motor terminal, which induce shaft voltage and common mode current, should be carefully considered to ensure system reliability. Although the high dv/dt issues can be mitigated with a dv/dt filter method, it leads to performance degradation depending on cable length. Meanwhile, a matrix converter also becomes a next-generation power converter for the VFDs which has a regeneration capability and unity power factor. Thus, this paper discusses the GaN-based matrix converter for the VFD as a study case considering the motor terminal voltage quality and the common mode current. Also, a sine wave filter is adopted to cope with the terminal voltage quality irrespective of cable length. The optimized design procedure of the sine filter considers practical issues. Experimental results are presented to suggest a suitable solution for the GaN-based VFDs in accordance with the cable length.

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Analysis of high‐frequency electromagnetic ringing phenomenon under GaN‐FET inverter excitation

Ogishima,

Thao,

Fujisaki

2024

Electrical Engineering Japan

Self Cite

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In this study, the ringing phenomenon of gallium nitride‐field effect transistor (GaN‐FET) and silicon‐insulated gate bipolar transistor (Si‐IGBT) inverter excitations in a ring sample was thoroughly measured and analyzed by using a high‐quality oscilloscope with a very high sampling rate of 5 giga‐samples per second (GS/s). Owing to the rapid switching of the GaN‐FET power devices in several nanoseconds and the ringing frequencies in the MHz range, the use of the high sampling rate of 5 GS/s is necessary and useful for accurate measurement. The experimental findings and analysis reveal the following three key points: (i) there are two possible types of high‐frequency resonance phenomena, that is, the first one caused by semiconductor devices and circuits and the other generated by the resonance with loads in use. (ii) The ringing phenomenon because of the resonance under the load is considered to be due to the rising time of pulses that are caused by the rapid switching of the semiconductor devices. (iii) The ability to measure and the two types of ringing phenomena depends on the intensity of the white noise of the measuring instrument

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Iron Loss Characteristics Evaluation Using a High-Frequency GaN Inverter Excitation

Cited by 34 publications

References 18 publications

High-Frequency Characterization of Losses in Fully Assembled Stators of Slotless PM Motors

High-Frequency Characterization of Losses in Fully Assembled Stators of Slotless PM Motors

Analysis and Design of a Sine Wave Filter for GaN-Based Low-Voltage Variable Frequency Drives

Analysis of high‐frequency electromagnetic ringing phenomenon under GaN‐FET inverter excitation

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