CORE COMPONENTS / DRAWING-LED REVIEW
An axial flux PCB stator replaces wound coils with patterned conductors. Bring the winding artwork, layer connections and cooling boundary together before treating a board outline as a motor-ready stator.
OEMs and R&D teams · Components or subassemblies · Scope confirmed after review
DESIGN TO MANUFACTURING
Copper thickness, trace width, vias and terminations set electrical and manufacturing constraints. Laminate choice and cooling determine a separate thermal boundary. Removing stator iron does not remove copper loss, rotor loss, torque ripple or the need for system validation.
A PCB stator is an adjacent ironless architecture, distinct from a yokeless segmented iron-cored stator. Assess torque, voltage, loss and packaging against your application rather than assuming an interchangeable replacement.
Supply layer artwork, stack-up, netlist, drill files and terminal details. Discuss copper thickness, clearances, registration and via construction before locking the winding geometry.
Provide phase identification and accessible test points. Agree continuity, resistance measurement temperature and isolation requirements so electrical acceptance is possible before integration.
DFM / SCOPE & COST DRIVERS
Use these decisions to scope a prototype. No board current rating, efficiency or motor torque is implied by this matrix.
| Decision | Required input | Trade-off to review |
|---|---|---|
| Conductors | Trace artwork, copper specification, current waveform and resistance target. | Copper loss, manufacturable feature spacing and etching/stack-up limits. |
| Interlayer connections | Winding netlist, via/drill definitions and phase terminations. | Connection resistance, thermal paths, inspection access and joint construction. |
| Insulation stack | Bus/phase voltage, transients, laminate and insulation requirements. | Spacing, dielectric test conditions, temperature and environmental exposure. |
| Mechanical integration | Active annulus, mounting, flatness and assembled clearance budget. | Board support, thermal expansion, warpage and rotor clearance. |
| Cost and revision | Prototype quantity, layer count, panel constraints and expected redesigns. | Setup/NRE, board fabrication, termination, inspection and repeat-order cost. |
AGREE THE EVIDENCE
No stock PCB stator, flight-qualified unit, certified medical part or current rating is offered on this page. Fabrication feasibility, materials, quantities and validation scope require a project review. Do not send restricted artwork before confidentiality terms are agreed.
Air-gap metrology & quality gates
START WITH NON-CONFIDENTIAL INPUTS
Send the scope and operating envelope first. Request an NDA before sharing proprietary artwork or detailed CAD. The next step is scope clarification and feasibility review; pricing and timing follow the agreed deliverable.
ENGINEERING FAQ
No. A PCB stator uses patterned conductors and can be an ironless architecture. A segmented yokeless stator may retain magnetic teeth. They require different electromagnetic, thermal and manufacturing reviews.
No. Removing stator teeth removes that source of cogging, but torque ripple, magnet geometry, current waveform and control still need system-level review. No zero-ripple motor performance is claimed here.
There is no universal rating. Share the copper and via geometry, current waveform, cooling, temperature limits and duty cycle. Establish acceptance through analysis and tests on the actual stack and assembly.
An outline can start a discussion. Fabrication needs controlled conductor artwork, layer stack, drill data, connections, materials and inspection requirements. Electromagnetic design ownership must also be agreed.
RELATED COMPONENTS
Architecture background: patterned copper can replace conventional windings in a PCB stator. Infinitum’s designs, results and intellectual property are their own; no affiliation or equivalent performance is implied. Infinitum: PCB stator technology overview.
Published / reviewed 20 October 2026 · YokelessMotor engineering content · Illustrations and planning guidance, not measured production results. About the project.
