Loss comparison of selected core magnetic materials operating at medium and high frequencies and different excitation voltages

The conventional power frequency (50 or 60 Hz) transformers are economical, highly reliable and quite efficient but they suffer with certain drawbacks like sensitive to harmonics, voltage drop under load, no protection from system disruptions and overloads, poor performance under dc offset load unbalances and no scope to improve power factor. These transformers with copper wound wires on iron cores are unable to respond to control signals as power generations become distributed and intermittent. So, the need of electronic based regulated power supply with software based remote intelligence has become essential. Also, to easily connect the new energy sources to the grid and to improve the power quality by harmonic filtering, voltage sag correction and highly dynamic control of the power flow, a new type of transformer based on power electronics, known as SST has been introduced. The SST realizes voltage transformation, galvanic isolation, power quality improvements such as instantaneous voltage regulation, voltage sag compensation and power factor correction. It is a collection of high-powered semiconductor components, high frequency power transformer and control circuitry which is used to provide a high level of flexible control to power distribution networks. The SST is a high frequency switched Power Electronic Devices (PEDs) based transformer with high controllability that enables flexible connectivity between existing medium voltage power distribution network, low voltage AC residential system and envisioned DC residential system. In this paper a systematic constructional detail of a SST with a power rating of 2 kVA, operating frequency of 20 kHz and voltage rating of 600/60 V as a scaled-down prototype used for power converter topologies is presented. The design is simple and it avoids the difficulty of choosing massive amounts of empirical parameters.

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“…• Volume and weight reductions which are critical in applications characterized by space limitations [6]; for example, electric locomotives.…”

Section: Sst Functionalitiesmentioning

confidence: 99%

High Frequency Solid State Transformer Design Considerations for Power Systems Applications

Nondy¹,

Bashar²,

Nondy³

et al. 2021

International Journal of Scientific Advances

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“…

P_{core} = K_{ns} K normalΔ B_{\max}^{x} F_{sw}^{y} M_{core}

The parameters K , x , and y can be obtained from the datasheet or curve fitted measurement data and

K_{ns}

is the factor to consider the non‐sinusoidal nature of the waveform. The maximum value of change of flux

()(, normalΔ B_{\max})

can be expressed as the function of the input voltage of the converter

()(, V_{s})

, the duty cycle

false(D false)

, the number of turns

false(N false)

of the power inductor, the effective cross‐sectional area

false(A false)

of the core and the switching frequency as shown in (6) [82].

normalΔ B_{\max} = \frac{V_{s} D}{2 N A f_{sw}}

The cobweb graph can be used as a simplified initial guide for picking a suitable magnetic material for a specific application.…”

Section: Selection Of Magnetic Coresmentioning

confidence: 99%

Comprehensive comparison and selection of magnetic materials for powertrain DC–DC converters

Beraki

Trovão

Perdigão

2020

IET Electrical Systems in Transportation

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In power powertrain, DC-DC converters, the selection of suitable magnetic core materials is a critical design consideration. It ensures weight and volume reduction and performance enhancement of such types of converters. This study provides a comprehensive comparison of magnetic core materials and a simplified cobweb chart that aids in the initial selection of magnetic core materials for powertrain DC-DC converters. The weighted property method (WPM) is used to systematically select and rank the suitability of the magnetic core materials, and a multi-attribute decision-making analytical hierarchy processes is used to calculate the relative weight of different properties. Based on the peculiar requirements of powertrain DC-DC converters, the most suitable magnetic core materials are identified and ranked with the help of the cobweb chart and the WPM. This study aims at providing a quick reference for designers to ease the selection of suitable magnetic core material for powertrain DC-DC converters.

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“…One of the main area of interest in renewable-grid integration is the construction and optimisation of magnetic component for power converter [7,8] which contribute to size and efficiency issue of the system [9][10][11][12][13]. Evaluation and analytical validation work for magnetic component [14][15][16][17][18][19][20] study (high frequency transformer) require dual H-bridge DC/DC converter system [21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Independent high voltage DC source development for renewable-grid integration interface

Hassan

Zulkifli

Zainal

et al. 2020

IJPEDS

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<span>Recent advancement in renewable-grid integration research, due to the concern on the environmental impact, leads to extensive study in isolated power converter as their interface. As part of isolation capability in power converter interface, extensive study of magnetic component has been carried out, especially on the design, construction and optimisation to achieve optimal operation. One of the main issue in verifying the analytical power loss model is to have independent HVDC link power source for an experimental validation work. This paper focus on the design and construction of DC link source, to be use in the experimental rig setup. Several DC link source option has been evaluated, and TDK-lambda PF500-360A power supply was selected due to the availability and excellent energy efficiency offered, at better price. External circuit is designed and implemented to achieve desired voltage and current supply characteristic. At the end, the voltage and current of the DC link supply for Dual H-bridges is obtained and shown promising result for experimental rig measurement and data collection work.</span>

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Loss comparison of selected core magnetic materials operating at medium and high frequencies and different excitation voltages

Cited by 24 publications

References 15 publications

High Frequency Solid State Transformer Design Considerations for Power Systems Applications

High Frequency Solid State Transformer Design Considerations for Power Systems Applications

Comprehensive comparison and selection of magnetic materials for powertrain DC–DC converters

Independent high voltage DC source development for renewable-grid integration interface

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