Electromagnetic Force Analysis
Static, quasi-static, and transient analyses to quantify Lorentz forces, torque, attractive forces, and electromagnetic vibration.
Overview
EFAN provides electromagnetic field analysis services primarily for fusion, accelerator, and nuclear systems. Using ANSYS Maxwell and related tools, we perform static, quasi-static, and transient analyses to supply the data needed for design decisions regarding force, torque, and losses from conceptual design through detailed validation.
Analysis Methods & Tools
- Static, quasi-static, and transient analyses
- Evaluation of Maxwell stress tensor, Lorentz forces, and body forces
- Torque, torque ripple, attractive forces, and reaction forces
- Estimation of eddy current loss and iron loss, including coils and permanent magnets
- Software: ANSYS Maxwell (coupled with Workbench when required)
Required Information
- 3D CAD models (STEP, etc.), cross-sectional drawings (for 2D applicability)
- Excitation conditions (current, turns, frequency, waveform, phases, connection)
- Boundary conditions (symmetry, periodic, open/PML), moving conditions (position, angle, rotation speed)
- Material properties (B–H curve, permeability, conductivity, permanent magnet Br and magnetization direction)
- Acceptance criteria (force/torque limits, vibration/noise, temperature rise, safety factors)
Deliverables
- Electromagnetic force distribution, time histories/statistics of torque and attractive forces
- Magnetic flux density and current density contours, evaluation of eddy current and iron losses
- Assessment report (assumptions, modeling, validation, discussion)
- Design improvement proposals (winding layout, core geometry, gap optimization, etc.)
Case: Electromagnetic force analysis of a tokamak vacuum vessel (modeled 40°/360° with periodic boundary conditions).
Process Workflow
| Step | Description | Deliverables |
|---|---|---|
| 1. Requirement Definition | Define objectives, excitation conditions, acceptance criteria, schedule | Requirement specification |
| 2. Model Preparation | CAD adjustment, material setup, coil and boundary condition definition, periodic boundary setup if needed | Pre-processed model data |
| 3. Simulation & Verification | Check convergence, validate boundary conditions and positional relationships | Verification log, simulation report |
| 4. Results Evaluation | Evaluate forces, torque, and losses, extract risks and design improvements | Assessment report |
| 5. Review & Handover | Share results, prepare traceability documentation, deliver data | Final report, deliverables |
Contact
For inquiries on electromagnetic force analysis, please include the target device, excitation conditions (current, frequency, turns, etc.), acceptance criteria, and desired delivery schedule.