Technical Insights
The Elexnova knowledge center for magnetic component engineering. Practical articles on inductors, high frequency transformers, EMI solutions, power supply design and industry applications - written for design engineers, sourcing teams and product managers who need to move from research to a working specification.
Content Center
Inductor technology, high frequency transformer design, EMI solutions, power supply design knowledge and application analysis. Filter by category or browse the full library.
No articles have been published in this category yet. Browse all technical insights or contact us with your question.
A practical guide to repeatable near-field probe measurements in switching power supplies: what loop and E-field probes actually sense, how height, orientation and cable currents distort readings, and how to localize noise sources and compare filter changes with confidence.
A selection method for the common mode choke in a data centre server supply: where the Class B conducted limit actually bites, how Y-capacitor value trades against leakage current across paralleled units, and the impedance and thermal data a supplier needs to quote.
A selection method for the high frequency transformer in an AI server power supply: frequency and flux swing, planar versus wound construction, leakage inductance, isolation coordination and the thermal data a supplier needs to quote.
A position-by-position method for EV charger power inductor selection: the PFC boost choke, the isolated DC/DC output inductor and the auxiliary rails, each with the ripple target, saturation definition and thermal condition a buyer should quote.
A look at the production base behind MiDEN magnetics: 500,000 pcs/day capacity, ISO9001:2015 quality management, in-house engineering and OEM/ODM sample support.
Compare noise paths, magnetic structures and impedance behavior to decide when a common mode choke, a differential mode inductor or a combined filter stage is the right answer.
How a common mode choke uses flux cancellation to block common mode noise while carrying load current, and which impedance, current and balance data should be checked before selection.
Reduce EMI in power electronics by separating noise modes, controlling switching loops and selecting magnetic components by impedance across frequency rather than inductance alone.
Practical EMI suppression for power supplies using chokes, transformer construction, shielding, layout control and grounding, with the measurements engineers should request from a supplier.
Ripple current, saturation current, thermal rise and DCR explained for buck, boost and buck-boost designs, plus the specification sheet a magnetics factory needs to quote accurately.
Choose between toroidal and drum core structures by magnetic containment, manufacturability, cost, board space and the thermal demand of the application.
Ferrite, iron powder, alloy powder and tape-wound cores compared by permeability, core loss, saturation behavior, temperature stability and cost for a given switching frequency.
Overheating, insulation breakdown, saturation, winding defects and mechanical stress are the usual failure routes in the field. Here is how each one is detected and prevented.
Automation equipment needs rugged, low-noise magnetics for drives, PLC power stages and sensing circuits. See how custom designs are matched to those constraints.
From drawing review and bobbin or core selection to winding, impregnation, electrical testing and packing: what actually happens between an RFQ and a delivered custom transformer.
Build an EMI filter stage from the noise path outward: separating common mode and differential mode noise, placing chokes and capacitors, controlling grounding and preparing for compliance testing.
The design flow for high frequency transformers: turns ratio, core and bobbin selection, winding loss, insulation coordination and thermal review for switching power supplies.
Communication and data lines pick up common mode noise from cables, grounds and nearby power stages. Chokes, impedance balance and layout practice keep the signal path clean.
Higher switching frequency shrinks magnetics but shifts loss into core and winding. Learn how transformer material, structure and winding choices trade size against efficiency.
Source, path and victim: a structured way to reduce EMI in switching power supplies through layout discipline, snubbers, magnetic component choice, shielding and cable control.
A step-by-step selection method for DC-DC power inductors: inductance from ripple current, saturation and thermal margin, DCR loss, shielding and the data a supplier needs for a fast quotation.
Supplier selection criteria for magnetic components: engineering response, sample capability, quality system, production capacity, compliance documents and long-term cost stability.
Inductors in solar, wind, storage and charging equipment: current profiles, environmental demands and the specification details that decide whether magnetics survive 20 years in the field.
Inductance, DCR, saturation, hi-pot, temperature rise and visual inspection: the test plan that keeps inductor batches consistent from sample to mass production.
Where high frequency transformers do the work in industry: switch-mode supplies, welding, medical, telecom and motor drive auxiliaries, with selection notes for each application.
AC and DC EV charger designs depend on PFC inductors, resonant transformers, common mode chokes and output filter magnetics. Review the selection priorities for each position.
Solar inverter magnetics must handle high DC current, wide temperature swing and long service life. See how boost, MPPT and output filter inductors are specified.
What RoHS, REACH and material declaration requests mean for inductors and transformers, and which documents buyers should collect before approving a magnetic component supplier.
A structure-level comparison of toroidal and drum core inductors covering stray magnetic field, winding cost, mounting style, thermal behavior and typical application fit.
What saturation current, rated current and temperature rise really mean on a datasheet, and how much inductance roll-off a high current converter can tolerate before performance drops.
Both are wound magnetic components, but current path, core behavior, saturation limits and selection criteria are different. Here is how to avoid mixing them up in a bill of materials.
Categories
Four editorial tracks keep the content center organized for engineers, buyers and returning readers.
Component selection, core material, winding, loss and reliability know-how for inductors, chokes and transformers.
19 articles →How magnetic components behave in solar, EV charging, industrial automation, telecom and power supply designs.
9 articles →Sourcing, compliance, quality systems and supply chain topics that affect magnetic component projects.
2 articles →Factory capability, quality system, capacity and service updates from the MiDEN manufacturing team.
1 article →Get Technical Support
Send drawings, target inductance, current, frequency, size limits and application details. Our engineers reply with selection advice and quotation support.