How to Become a Magnetics Designer: Tools, Learning, and Portfolio Tips

Top 10 Magnetics Designer Projects to Showcase Your Expertise

A strong portfolio demonstrates technical depth, practical problem-solving, and creativity. Below are ten project ideas—ranging from foundational designs to advanced, application-driven work—that magnetics designers can build to showcase skills in core loss analysis, thermal management, electromagnetic simulation, manufacturability, and system integration. For each project I list goals, key technical challenges, recommended tools/methods, and a succinct deliverable you can include in a portfolio.

1) High-Efficiency Power Inductor for a DC–DC Converter

• Goal: Design a surface-mount power inductor optimized for high efficiency at a specified current and switching frequency (e.g., 20 A, 500 kHz).
• Challenges: Low DCR, core loss vs. copper loss tradeoff, thermal rise, EMI.
• Tools/Methods: Finite-element magnetic simulation (e.g., Ansys Maxwell, FEMM), analytical calculations, winding loss estimation, thermal simulation.
• Deliverable: Datasheet-style summary (specs, efficiency curve), 3D models, loss breakdown, thermal test results.

2) Wideband Common-Mode Choke for EMI Mitigation

• Goal: Create a common-mode choke with broadband attenuation across a specified frequency band (e.g., 100 kHz–50 MHz).
• Challenges: Balancing insertion loss and saturation margin, interwinding capacitance, material selection.
• Tools/Methods: S-parameter measurements, impedance modeling, layout impact study.
• Deliverable: S-parameter plots, impedance vs. frequency, prototype photos, PCB placement guidelines.

3) High-Power Transformer for Isolated Power Supply

• Goal: Design a compact, isolated transformer for a 300 W flyback or forward converter.
• Challenges: Core selection for flux density and loss, winding insulation, leakage inductance control, creepage/clearance for safety.
• Tools/Methods: Turn ratio and gapping calculations, Maxwell or similar for leakage inductance, regulatory standards checklist (safety approvals).
• Deliverable: Winding diagrams, interleaving strategy, safety compliance notes, prototype test data (efficiency, temperature).

4) Planar Magnetics for Compact PCB-Integrated Power

• Goal: Implement planar transformer/inductor structures on PCB for space-constrained converters.
• Challenges: Layer stackup optimization, copper thickness, thermal vias, increased parasitics.
• Tools/Methods: PCB manufacturing constraints, 2D/3D EM simulation, impedance extraction.
• Deliverable: PCB layout files, layer stack diagrams, measured parasitics, manufacturing notes.

5) Low-Profile Wireless Charging Coil with Foreign Object Detection (FOD)

• Goal: Design a flat coil for wireless power transfer (e.g., 15 W pad) including FOD sensitivity.
• Challenges: Coil geometry for coupling coefficient, resonance tuning, FOD detection algorithm, EMI safety.
• Tools/Methods: Coupling and k-factor calculations, network analyzer measurements, prototype testing with metallic objects.
• Deliverable: Coupling vs. distance plots, coil drawings, FOD test procedure and results.

6) Soft Magnetic Composite (SMC) Component for 3D Flux Paths

• Goal: Use SMC materials to create a compact 3D magnetic part (e.g., rotor core or unconventional inductor).
• Challenges: Material property characterization, manufacturability, eddy current losses.
• Tools/Methods: Material datasheet testing, 3D FEM, prototyping with SMC vendors.
• Deliverable: Material selection rationale, simulated flux plots, prototype photos and performance summary.

7) High-Frequency GaN Converter Magnetics

• Goal: Design magnetics optimized for GaN-based converters operating at multi-MHz switching frequencies.
• Challenges: High core loss at MHz, winding skin/ proximity effects, compactness.
• Tools/Methods: Loss modeling using Steinmetz parameters, litz or foil winding strategies, thermal management.
• Deliverable: Core loss vs. frequency graphs, winding design details, efficiency comparison to low-frequency designs.

8) Automotive-Grade Inductor with Robust Thermal & Vibration Performance

• Goal: Engineer an inductor meeting AEC-Q200 or equivalent robustness requirements for automotive environments.
• Challenges: Mechanical vibration, wide temperature range, humidity, long-term reliability.
• Tools/Methods: Environmental testing plans, shock/vibration simulation, potting or mechanical reinforcement techniques.
• Deliverable: Reliability test matrix and results, mechanical drawings, failure mode analysis.

9) Magnetic Component Failure Analysis and Redesign

• Goal: Take a failed or marginal magnetic component and perform root-cause analysis, then redesign for improved performance.
• Challenges: Identifying thermal hotspots, saturation under real loading, manufacturing defects.
• Tools/Methods: Thermal imaging, X-ray or cross-sectioning, FEM verification of redesign.
• Deliverable: Before/after comparison, failure root-cause report, redesigned part specs and test results.

10) Open-Source Magnetics Design Tool or Script

• Goal: Create a reusable calculator or script (MATLAB, Python) that automates common magnetics tasks: core selection, turns calculation, loss estimation, or winding layout.
• Challenges: Accuracy vs. simplicity, validation with measured data.
• Tools/Methods: Code, unit tests, validation datasets.
• Deliverable: GitHub repo link, README with examples, validation plots.

How to Present These Projects in Your Portfolio

• One-page project summary for each: objective, constraints, approach, results (include key plots/tables).
• Include simulation files and measured data where possible.
• Photos of prototypes and test setups, and concise design lessons learned.
• Optional: short video (60–90 s) demonstrating a key test or performance metric.

These projects together demonstrate core magnetics design skills—electromagnetic simulation, thermal and mechanical considerations, manufacturability, and system-level thinking—making a strong portfolio for hiring managers or clients.