Determination of the optimal thickness for a multi-layer transformer winding

Iyer, Kartik V.; Basu, Kaushik; Robbins, W.P.; Mohan, Ned

doi:10.1109/ecce.2013.6647195

Cited by 6 publications

(3 citation statements)

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“…It is already proved that for each particular m, there is an optimum ∆ opt which leads to the minimization of the total ac resistance with Dowell's equation [11][12][13]:…”

Section: B Optimum Diameter Formula For Foil Conductorsmentioning

confidence: 99%

“…The reduction of losses in power transformers relies on both magnetic core and winding design [1][2][3][4]. Based on various analytical expressions of transformer ac resistance [5][6][7][8][9][10], the optimization of the conductor diameter for different winding types are achieved by predefined number of winding layers m, number of strands of Litz wires k str , and current waveforms [11][12][13]. Those methods could be easily realized by simple analytical formulas, however, the required information such as m and k str are difficult to be determined at the beginning of the winding optimization.…”

Section: Introductionmentioning

confidence: 99%

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An AC resistance optimization method applicable for inductor and transformer windings with full layers and partial layers

Shen

Jin

et al. 2017

2017 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Abstract-This paper proposes an ac resistance optimization method applicable for both inductor and transformer windings with full layers and partial layers. The proposed method treats the number of layers of the windings as a design variable instead of as a predefined parameter, compared to existing methods. The window height and width of magnetic cores and the insulation requirements are introduced as boundary conditions in the optimization process. The optimization can be realized simply by mathematical design map analyses instead of iteration programs. Moreover, a corresponding closed form expression of ac resistance of windings with partial layers is proposed. The developed analytical equation is verified by both Finite Element Method (FEM) simulations and experimental results from two transformer prototypes. A case study of a transformer design with partial layer windings for a LCC resonant circuit is presented with experimental verifications to demonstrate the optimization method.

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“…It is already proved that for each particular m, there is an optimum ∆ opt which leads to the minimization of the total ac resistance with Dowell's equation [11][12][13]:…”

Section: B Optimum Diameter Formula For Foil Conductorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An AC resistance optimization method applicable for inductor and transformer windings with full layers and partial layers

Shen

Jin

et al. 2017

2017 IEEE Applied Power Electronics Conference and Exposition (APEC)

View full text Add to dashboard Cite

show abstract

“…A partially resonant parallel LC tank was also used in designing a high frequency transformer as explained in reference [10]. Having sinusoidal current through the transformer also reduces the winding losses and can lead to a more compact transformer design as explained in [11]. This paper uses a H-bridge on the DC side to generate the high frequency link voltage and modulates the output cycloconverter by a space vector technique that has been modified to work with the high frequency voltage.…”

Section: Introductionmentioning

confidence: 99%

High frequency ac-link transformer isolated three phase inverter with natural commutation of leakage energy

Gandikota

Mohan

2014

7th IET International Conference on Power Electronics, Machines and Drives (PEMD 2014)

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A high frequency ac link, transformer isolated three phase inverter capable of bidirectional power flow is presented in this paper. Such an inverter finds widespread use in applications like interfacing alternate energy sources to the grid, UPS systems. A resonant LC circuit is used to achieve natural commutation of leakage energy in the leakage inductance of the transformer. This natural commutation of leakage energy eliminates the need for additional circuitry otherwise needed to commutate the trapped energy. Additionally, the high frequency ac link makes it possible to reduce the size of the transformer resulting in a lower cost and a compact design. The ac link is utilized to achieve zero voltage switching in the output cycloconverter. A 3 phase, 5kW inverter is simulated in the SIMULINK environment and the results are discussed.

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