Designing a DC-Excited E-Core Magnetic: Calculating Characteristics

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Discussion Overview

The discussion revolves around calculating the characteristics of a DC-excited E-core magnetic design. Participants explore various parameters related to the magnetic core, including wire area, current density, and inductance, as well as the implications of different core materials.

Discussion Character

  • Technical explanation
  • Mathematical reasoning
  • Debate/contested

Main Points Raised

  • One participant seeks to calculate characteristics of a magnetic core excited by a DC source, specifically using an E-core design.
  • Another participant inquires about the specific characteristics and core materials being considered.
  • A repeated inquiry emphasizes the need to calculate winding wire area, current density, window utilization factor, and current in the wire.
  • One participant suggests that only the window utilization factor directly affects the core, proposing that the focus should be on determining flux density, inductance, and the number of turns for a desired inductance.
  • Discussion includes a recommendation for using an electromagnetics simulation tool, specifically mentioning Infolytica's MagNet tool and its documentation as resources for further exploration.

Areas of Agreement / Disagreement

Participants express differing views on which characteristics are relevant to the core design, indicating a lack of consensus on the primary focus of the calculations.

Contextual Notes

Participants have not fully clarified assumptions regarding core material properties or the specific conditions under which the calculations are to be made, leaving some aspects unresolved.

Tmaczorro2
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Hi, I would like to calculate the characterics of a magnetic that is excited by a direct current[dc] source. I aim to use a E-core for my design.
 
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What kind of characteristics and what kind of core material?
 
Hi, I would like to calculate the characterics of a magnetic core that is excited by a direct current[dc] source. These characterics are winding wire area[diameter], Current desity, window utilization factor ku, current in the wire. I aim to use a E-core for my design.
 
Other than ku, none of the characteristics you mentioned affect the core. What you probably mean is you want to find the flux density in the core for a particular dc current or peak current. Is that correct. You probably also want to find out the inductance and the number ofturns that will give that particular inductance.

The wire sizes will depend on how much is the dc current level and hence current density J can be calc'd.
 
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