Behavior of Minor Loop and Iron Loss Under Constant Voltage Type PWM Inverter Excitation

Kawabe, M.; Nomiyama, Takuma; Shiozaki, Akira; Kaihara, H.; Takahashi, Norio; Nakano, Masami

doi:10.1109/tmag.2012.2198199

Cited by 41 publications

(15 citation statements)

References 7 publications

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“…The authors conclude that the material specific iron losses tend to increase when the modulation index decreases. One of the cause of this increase is that reducing the modulation index has for effect to widen the minor hysteresis loops in the material (5) . Under the assumption that the harmonic content of the PWM supplied voltage is only responsible for extra eddy current losses, some authors are able to propose analytical formulas of the iron losses caused by PWM in transformers (6) .…”

Section: Introductionmentioning

confidence: 99%

Impact of the Inverter DC Bus Voltage on the Iron Losses of a Permanent Magnet Synchronous Motor at Constant Speed

Denis

Fujisaki

2017

IEEJ Journal IA

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In this paper, the impact of the DC bus voltage on the iron losses of a permanent magnet synchronous motor (PMSM) fed by a pulse-width modulation inverter is evaluated. Under constant speed operation, the modulation index decreases when the DC bus voltage increases. This modifies the harmonic content of the PMSM input voltage and then affects the motor iron losses. The experimental measurements results show that, for the conditions considered in this paper, the total iron losses are 1.8 times larger at the lowest modulation index than at the highest one.

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Section: Introductionmentioning

confidence: 99%

Impact of the Inverter DC Bus Voltage on the Iron Losses of a Permanent Magnet Synchronous Motor at Constant Speed

Denis

Fujisaki

2017

IEEJ Journal IA

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“…0 v L dt · · · · · · · · · · · · · · · · · · · · · · · · · · · · (6) where N is the primary winding number, A c is the crosssectional area of the core, T s is the switching cycle, and v L is the inductor voltage. By adjusting v L , the iron loss under the desired B p condition can be measured.…”

Section: Experimental Verificationmentioning

confidence: 99%

Iron-loss Calculation of Inductors Considering Non-uniform Flux Density Conditions

et al. 2019

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Owing to the significant advances made in the field of power semiconductor devices, such as SiC and GaN, the switching frequency of power converters has been increased. Thus, the volume of passive components such as filter inductors and transformers can be reduced. However, the reduction in the heat-dissipation surface area of inductors results in a considerable increase in temperature, which is a constraint for increasing the power density of power converters. To prevent these problems, the iron-loss evaluation of inductors is one of the most important issues in realizing high-power-density converters. This paper presents an accurate iron-loss calculation method for inductors considering the non-uniformity of the flux-density distribution in the magnetic core. First, it is verified that the non-uniformity of the flux-density distribution in the core results in the deviation of the iron-loss measurement even when the same magnetic material is used in the core and when the inductor is excited under the same excitation condition. Next, the procedure to obtain the iron-loss data, which describes the relationship between the iron loss and excitation condition more precisely, is introduced. Finally, a method to accurately calculate the iron loss in an inductor using electromagnetic simulation and more precise iron-loss data is introduced. method is verified using a toroidal core and a UU core under sine voltage condition and rectangular voltage condition.

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“…PWM inverter outputs have higher harmonic components superimposed in fundamental waveforms. Many studies have reported that, due to high harmonic components, iron loss of the motor core under PWM inverter excitation increases [7][8][9][10][11][12][13][14][15][16][17] by 10%-50% 10) compared with sinusoidal excitation. In these researches, magnetic hysteresis loops had many minor loops.…”

Section: Introductionmentioning

confidence: 99%

Iron Loss and Magnetic Hysteresis Properties of Nanocrystalline Ring Core at High and Room Temperatures Under Inverter Excitation

2020

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This paper discusses the iron loss and magnetic hysteresis properties of a ring core of nanocrystalline magnetic materials (NMM) at room temperature (RT) and high temperature (HT) under pulse-width-modulation (PWM) inverter excitation. As in the case of the DC hysteresis loop, the coercivity of the NMM ring core at 300 • C (HT) under PWM inverter excitation is larger than that at RT, mainly because of weakening of intergranular magnetic coupling at HT. In addition, in the NMM ring core, the area of the minor loops at HT increases compared with that at RT. Iron loss in the NMM core fed by the PWM inverter increases in tandem with an increase in temperature. Hysteresis loss increases dramatically in tandem with an increase in temperature for every tested case. In a low carrier frequency region, the eddy current loss at 300 • C increases.

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Behavior of Minor Loop and Iron Loss Under Constant Voltage Type PWM Inverter Excitation

Cited by 41 publications

References 7 publications

Impact of the Inverter DC Bus Voltage on the Iron Losses of a Permanent Magnet Synchronous Motor at Constant Speed

Impact of the Inverter DC Bus Voltage on the Iron Losses of a Permanent Magnet Synchronous Motor at Constant Speed

Iron-loss Calculation of Inductors Considering Non-uniform Flux Density Conditions

Iron Loss and Magnetic Hysteresis Properties of Nanocrystalline Ring Core at High and Room Temperatures Under Inverter Excitation

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