Harmonic winding loss in buck DC–DC converter for discontinuous conduction mode

Murthy-Bellur, Dakshina; Kazimierczuk, Marian K.

doi:10.1049/iet-pel.2009.0108

Cited by 30 publications

(33 citation statements)

References 12 publications

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“…Substituting (10) into (8) the temperature dependent approximated ac-to-dc winding resistance ratio for the foil winding is given by ( ) ( ) (14) The approximated temperature dependent ac winding resistance of the foil winding is given by ( ) ( ) ( ) Taking the derivative of (15) with respect to the foil thickness and equating the result to zero one obtains (16) This yields the temperature dependent optimum foil thickness ( ) (17) Substituting (17) into (15) …”

Section: Thermal Optimization Of the Foil Windingmentioning

confidence: 99%

“…For the high power inductors, from aforementioned losses, significant role plays the winding losses [9][10][11][12][13][14][15][16][17][18][19][20][21][31][32][33][34][35][36]. While core and dielectric loss are decreased by selection of low-loss materials, the winding losses are significantly reduced by optimization of the winding conductor size [16,17,19].…”

Section: Introductionmentioning

confidence: 99%

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Thermal analytical winding size optimization for different conductor shapes

Wojda¹

2015

Archives of Electrical Engineering

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Abstract. The aim of this paper is to derive an analytical equations for the temperature dependent optimum winding size of inductors conducting high frequency ac sinusoidal currents. Derived analytical equations are useful designing tool for research and development engineers because windings made of foil, square-wire, and solid-round-wire windings are considered. Temperature dependent Dowell's equation for the ac-to-dc winding resistance ratio is given and approximated. Thermally dependent analytical equations for the optimum foil thickness, as well as valley thickness and diameter of the square-wire and solid-round-wire windings are derived from approximated thermally dependent ac-to-dc winding resistance ratios. Minimum winding ac resistance of the foil winding and local minimum of the winding ac resistance of the solid-round-wire winding are verified with Maxwell 3D Finite Element Method simulations.

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Section: Thermal Optimization Of the Foil Windingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal analytical winding size optimization for different conductor shapes

Wojda¹

2015

Archives of Electrical Engineering

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“…Both methods provide good accuracy especially where strand diameter is much lower than the skin depth [7], [13], [16]. A detailed study on copper loss analysis of buck and fly-back dc-dc converters under variable duty ratio based on the first analytical method has been presented recently [20], [21] although none of these studies deal with the multiple winding transformer and phase shifted waveforms. In [8] the copper loss of a dual active bridge (DAB) bidirectional converter is studied considering the effects of phase shift of voltages applied to the transformer.…”

Section: Introductionmentioning

confidence: 99%

Accurate copper loss analysis of a multi-winding high-frequency transformer for a magnetically-coupled residential micro-grid

Jafari

Malekjamshidi

Zhu

2017

2017 20th International Conference on Electrical Machines and Systems (ICEMS)

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Improvements in characteristics of magnetic materials and switching devices have provided the feasibility of replacing the electrical buses with high frequency magnetic links in micro-grids. This effectively reduces the number of voltage conversion stages, and the size and cost of the renewable energy system. It also isolates the converter ports which increases the system safety and facilitates bidirectional power flow and energy management. To design the magnetic link optimally, an accurate evaluation of copper loss of the windings considering both current waveforms and parasitic effects is required. This paper studies the accurate copper loss analysis of a three-winding high-frequency magnetic link for residential micro-grid applications. Due to the non-sinusoidal nature of the voltage and currents, the loss analysis is carried out on a harmonic basis taking into account variations of phase shift, duty ratio and amplitude of wave-forms. The high frequency skin and proximity effects are taken into account. The maximum and minimum copper loss operating points of the converter and their dependency on the phase shift and duty ratio of the waveforms are studied and simulation results are presented.

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“…2) Choose a sufficient air-gap length to avoid core saturation and minimize core power loss [8]- [12] 3) Provide an optimized winding geometry and winding arrangement [13]- [15]. 4) Predict the winding and core power losses; hence, the total power loss [16]- [19]. 5) Identify an appropriate model that best represents the inductor behavior over a range of operating frequencies and to be able to predict the ac characteristics [20]- [25].…”

mentioning

confidence: 99%

“…The analysis presented in this paper includes the effect of fringing [1]. Typically, in switching circuits, the current through the choke inductors are nonsinusoidal [11], [16], [25], [27], [28], [30]. The losses in the winding as well as in the magnetic core are caused by the dc, fundamental and higher order harmonics.…”

mentioning

confidence: 99%

Analysis and Design of Choke Inductors for Switched-Mode Power Inverters

Saini

Ayachit

Reatti

et al. 2018

IEEE Trans. Ind. Electron.

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Abstract-This paper presents the design, analytical estimation of power losses, and experimental measurement of choke inductors for switched-mode power inverters. The described approach is applicable to a wide variety of circuits such as Class-E inverters and converters. The expressions required to design the magnetic core in the choke inductor using the area-product ( A p ) method are given. The equations for the dc resistance, ac resistance at high frequencies, and dc and ac power losses are provided for the solid round winding wire. To validate the presented approach, an example class-E zero-voltage switching power inverter with practical specifications is considered. A core with air gap is selected to avoid core saturation in the choke inductor, which conducts dc current and a small ac current. The gapped core power loss density and power loss are estimated using Steinmetz empirical equation. It is shown that the winding power loss due to the dc current is dominant for the given design. A comparison between the area-product A p method and the preexisting core geometry coefficient K g method is presented. The measured magnitude of the inductor impedance has shown that the designed choke is useful up to ten times the switching frequency.

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Harmonic winding loss in buck DC–DC converter for discontinuous conduction mode

Cited by 30 publications

References 12 publications

Thermal analytical winding size optimization for different conductor shapes

Thermal analytical winding size optimization for different conductor shapes

Accurate copper loss analysis of a multi-winding high-frequency transformer for a magnetically-coupled residential micro-grid

Analysis and Design of Choke Inductors for Switched-Mode Power Inverters

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