Iron losses in electrical machines excited by nonsinusoidal voltages

Moses, Anthony John; Leicht, J.; Anderson, Philip Ian

doi:10.1049/cp:20020123

Cited by 6 publications

(5 citation statements)

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“…Also, the core losses of PWM excited toroidal core transformer increases according to sinusoidal excitation [10]. The core losses in the electric machines are different with respect to each other depending under the sine, square or PWM voltage excitation [11].…”

Section: Medium Frequencymentioning

confidence: 99%

“…From this graph it can be easily seen that voltage value reached the saturation of the transformer core. If the number of the turns 21 is used at 400 Hz sinusoidal AC excitation, the peak value of the voltage, which starts the saturation, is determined as 48 V. In the parametric analysis, the inductance value changes depending on the saturation according to (11) because the number of the windings (N) and the core effective cross-section (Ac) are constant. However, this change is not linear due to the saturation effect.…”

Section: Medium-frequency Transformermentioning

confidence: 99%

“…i NBA L c (11) When the peak value of the flux density is approximately 1.4 T in the case of 400 Hz and 48 V, sinusoidal excitation of the AMCC1000 sized transformer flux distribution in the core is given in Fig.6. The flux value within the core window, which is obtained by wrapping the ribbons, is larger.…”

Section: Medium-frequency Transformermentioning

confidence: 99%

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Core material investigation of medium-frequency power transformers

Balci

Sefa

Bayram

2014

2014 16th International Power Electronics and Motion Control Conference and Exposition

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Medium-frequency power transformers are used in DC-DC converters topologies such as photovoltaic, wind turbines, fuel cells, electric vehicles and uninterruptible power supply systems. In the design of magnetic circuit components such as transformer and inductor, the choice of the core material is of great importance in terms of losses and magnetic induction. For determining the size of the medium-frequency transformer, frequency and magnetic flux density are also two key parameters. In this study, the core volume change with the frequency is mathematically analyzed and modeled by using finite element analysis method. Parametric analysis provides very useful information in order to determine the excitation voltage level, which does not cause the saturation in the core, for the switching frequency. Thus, parameters of the designed transformer equivalent circuit can be optimized. Then, medium-frequency transformer is operated in power electronic circuits and saturation effect and core losses according to the preferred magnetic materials are investigated by performing co-simulation.

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Section: Medium Frequencymentioning

confidence: 99%

Section: Medium-frequency Transformermentioning

confidence: 99%

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Core material investigation of medium-frequency power transformers

Balci

Sefa

Bayram

2014

2014 16th International Power Electronics and Motion Control Conference and Exposition

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“…These Switching angles can be found by using different techniques. By using the regular sampling method crossing points (α k ) can be found using the eqa(1) [1].…”

Section: -φ Half Bridge Bipolar Spwm Output Analysismentioning

confidence: 99%

“…Optimization of system efficiency is a challenge for magnetic material producers, motor designers and end users to optimize the performance of machine cores under complex magnetization condition [1]. In [2]- [9] some valuable information related to the iron losses was reported.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of transformer operated by Sinusoidal pulse width modulation Inverter

Chowdary

Sekhar

2014

2014 International Conference on Advances in Electrical Engineering (ICAEE)

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The proliferation in the power electronics technology made many of the electric devices controlled in a flexible manner as desired by the load. In this process of flexible control we need to take care of harmonics injected by the power electronic equipment. With the increase in harmonics heating and de-rating of the device are the most critical factors that will affect the performance the devices. In this paper, we focus on the iron losses of a transformer operated by Sinusoidal PWM inverter. We considered 1-φ half bridge Bipolar SPWM Inverter with regular sampling method. Operation of the inverter mainly depends on PWM parameters. With the variation in the amplitude modulation ratio and frequency modulation ratio, performance indices of the transformer are analyzed.

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