Axial lamination and winding support for AFPM stators with dynamic punching, polygon correction, flat-wire coils, varnish insulation, Hi-pot, and RFQ scope.
Lamination and winding services should be scoped as a controlled process package. The buyer should separate lamination manufacturing, stack locking, winding, insulation, impregnation, coating, inspection, electrical testing, and final acceptance before comparing quotes.
| Parameter | RFQ Planning Range | Engineering Note |
|---|---|---|
| Lamination material route | 0.10-0.35 mm silicon steel planning discussion for low-frequency AFPM programs | Final material grade and thickness depend on frequency, permeability, loss target, cutting route, coating, burr control, and supplier availability. |
| Process route | Dynamic punching, synchronized winding, tape-wound stack, wire-EDM, laser cut, or hybrid sample route | The route should be chosen from magnetic target, volume, slot geometry, polygon control, burr limit, and tooling budget. |
| Axial stator envelope | OD 30-800 mm; ID 25 mm min.; axial height 5-110 mm | Envelope feasibility should be checked against strip route, winding access, fixture strategy, stack locking, and final inspection reach. |
| Slot count planning range | 3-112 slots | Slot opening, tooth pitch, polygon effect, pitch drift, coil insertion, and lead exit drive manufacturability. |
| Polygon correction | OD/ID roundness, slot pitch, circular runout, and air-gap face correction by fixture and inspection plan | A plus/minus 0.5 mm class planning target can be discussed only when process route, part size, and measurement method are locked. |
| Edge and insulation control | Burr limit, deburring, coating integrity, interlaminar resistance, and short-path review | Cut edges, welds, burrs, and handling damage can create interlaminar shorts that defeat the purpose of laminations. |
| Stack locking method | Self-bonding coating, adhesive, clamp fixture, laser spot weld, or mechanical retention by drawing | The locking method should be reviewed for heat distortion, eddy-current bridges, datum shift, and later winding access. |
| Winding route | Concentrated winding, flat wire, hairpin, I-pin, bobbin, or post-assembly winding review | The winding method should be frozen before lamination geometry, slot opening, lead exit, and insulation clearances are released. |
| Impregnation and coating | Resin varnish impregnation, vacuum-assisted varnish, epoxy powder coating, masking, and cure route by drawing | Coating and impregnation should be quoted separately from bare lamination and bare winding scope. |
| Electrical acceptance | Resistance, phase balance, surge, insulation resistance, Hi-pot, visual lead check, and sample ID record | Electrical acceptance criteria should be quoted separately from dimensional core acceptance. |
| Release evidence | FAI, CMM/3D scan, slot pitch report, burr note, stacking factor, coating note, electrical test report, and packing record | A wound stator sample should ship with records that separate core geometry, stack quality, winding, insulation, and final electrical tests. |
Evidence Pack
For custom product RFQs, the useful proof is a controlled evidence package: drawings, material route, inspection records, validation scope, and sample acceptance notes.
Evidence to Prepare
Operating frequency, target flux density, loss model, permeability requirement, torque profile, SMC comparison notes, and cost or volume target.
Acceptance Focus
Prevents choosing laminations only by habit when SMC may better support 3D flux, high frequency, or near-net-shape geometry.
Evidence to Prepare
OD/ID tolerance, slot pitch target, air-gap face CTQ, fixture concept, CMM or 3D scan method, and acceptance report format.
Acceptance Focus
Turns polygon effect from a vague process risk into an inspectable tolerance plan before sample approval.
Evidence to Prepare
Burr limit, deburr route, coating integrity check, self-bonding or weld map, interlaminar resistance scope, and visual criteria.
Acceptance Focus
Protects the magnetic benefit of thin silicon steel by controlling burrs, weld bridges, and coating damage.
Evidence to Prepare
Wire size, flat-wire or hairpin model, turns, phase scheme, slot-fill target, coil insertion path, lead exit, bobbin or fixture, and cooling boundary.
Acceptance Focus
Avoids redesign after the core is already tooled because winding clearance, insulation build, or lead routing was not checked.
Evidence to Prepare
FAI, slot pitch report, stacking factor, coating or varnish record, resistance, phase balance, surge or Hi-pot result, sample IDs, and packing note.
Acceptance Focus
Lets engineering, quality, and sourcing teams approve the same wound stator package without confusing visual approval with electrical release.
| Buyer Checkpoint | Evidence to Prepare | Acceptance Focus |
|---|---|---|
| Can the buyer justify why a lamination route is preferred over SMC for this axial flux stator? | Operating frequency, target flux density, loss model, permeability requirement, torque profile, SMC comparison notes, and cost or volume target. | Prevents choosing laminations only by habit when SMC may better support 3D flux, high frequency, or near-net-shape geometry. |
| Can polygon correction be verified with a defined datum and measurement method? | OD/ID tolerance, slot pitch target, air-gap face CTQ, fixture concept, CMM or 3D scan method, and acceptance report format. | Turns polygon effect from a vague process risk into an inspectable tolerance plan before sample approval. |
| Can edge quality and stack locking avoid interlaminar shorts? | Burr limit, deburr route, coating integrity check, self-bonding or weld map, interlaminar resistance scope, and visual criteria. | Protects the magnetic benefit of thin silicon steel by controlling burrs, weld bridges, and coating damage. |
| Can the winding route be built without changing the lamination geometry late in the project? | Wire size, flat-wire or hairpin model, turns, phase scheme, slot-fill target, coil insertion path, lead exit, bobbin or fixture, and cooling boundary. | Avoids redesign after the core is already tooled because winding clearance, insulation build, or lead routing was not checked. |
| Can the shipped sample separate dimensional, insulation, and electrical acceptance records? | FAI, slot pitch report, stacking factor, coating or varnish record, resistance, phase balance, surge or Hi-pot result, sample IDs, and packing note. | Lets engineering, quality, and sourcing teams approve the same wound stator package without confusing visual approval with electrical release. |
Any released claim should be tied to the buyer drawing, sample ID, material batch, inspection method, and agreed test condition instead of a generic marketing statement.
| Metric | Typical Range | Why It Matters |
|---|---|---|
| Lamination thickness | 0.10-0.35 mm silicon steel planning range | Thickness selection affects permeability, eddy-current loss, punching feasibility, burr risk, and sourcing availability. |
| Polygon correction | OD/ID roundness, slot pitch, runout, and air-gap face by drawing and fixture plan | Axial lamination stacks can drift from true round geometry unless the process and inspection plan correct the polygon effect. |
| Interlaminar insulation | Coating, burr, weld, bonding, and handling dependent | Burrs or shorts between laminations can erase the expected eddy-current advantage. |
| Stacking factor | Material coating, strip route, bonding method, clamp pressure, and inspection method dependent | Stacking factor links magnetic cross-section, axial height, heat path, and repeatable assembly fit. |
| Slot fill and winding resistance | Flat-wire, hairpin, I-pin, round wire, turns, lead exit, and insulation build dependent | A lamination core is only useful if the winding package can be built, insulated, cooled, and tested. |
| Electrical release evidence | Resistance, phase balance, insulation resistance, surge scope, Hi-pot result, and sample IDs | A wound stator package needs auditable electrical records before it can move from prototype to pilot build. |
Laminations can be attractive for low-frequency, high-permeability designs where the magnetic path and winding method fit a silicon-steel process. SMC is stronger when 3D flux, high frequency, net-shape geometry, or segmented assembly justify it.
It means the tooth or slot features are controlled together with the strip or stack-forming route instead of being treated as a generic radial motor stamping. The RFQ should define slot geometry, pitch tolerance, OD/ID roundness, air-gap face, fixture concept, and inspection method.
Useful RFQs define the affected geometry, measurement datum, allowable pitch drift, OD/ID or runout target, sample inspection method, and whether the target is for bare stack, locked stack, or wound stator.
Yes. The RFQ should state whether the buyer wants lamination core only, wound core, insulated stator, impregnated stator, or final tested assembly.
Yes, when the buyer provides wire geometry, turn count, phase scheme, slot-fill target, lead exit, insulation build, thermal boundary, and prototype quantity. Flat-wire feasibility should be checked before slot geometry is frozen.
Common RFQ scope items include self-bonding coating, resin varnish impregnation, vacuum-assisted varnish, epoxy powder coating, masking, cure condition, resistance, surge, insulation resistance, and Hi-pot test.
No. We support component and process manufacturing scope. Final motor performance depends on buyer-side electromagnetic design, magnet system, rotor, cooling, drive, and validation.
A practical shipment can include FAI, CMM/3D scan, slot pitch report, stacking factor, burr or edge-quality note, coating or varnish record, resistance and Hi-pot result when included, sample IDs, and packing notes.
Inquiry Email
Attach STEP/DXF/PDF plus frequency, flux density, sample quantity, annual forecast, and destination.
