Buyer Decision Inputs
- Topology target: yokeless, slotless, segmented stator, or hybrid concept
- Electromagnetic package data: phase count, pole count, voltage, and current limit
- Thermal model assumptions, cooling route, and winding temperature target
Yokeless and segmented-stator AFPM motor sourcing support for teams exploring high power density, short end-turns, and lightweight electric propulsion packages.
| Metric | Typical Range | Why It Matters |
|---|---|---|
| Mass reduction target | 15-25% lighter than iron-core stators | Yokeless AFPM work is justified when weight and axial package savings create system-level value. |
| Winding temperature | Class F/H or project-specific | Concentrated segments can create local hot spots if thermal extraction is weak. |
| Manufacturing maturity | Prototype, pilot, or validated production | Some AFPM topologies look strong in simulation but require special fixtures and process controls. |
The following physical and electrical parameters define the baseline envelope for this product family. Final values are governed by the specific winding and cooling configuration chosen during the RFQ process.
| Parameter | Planning Range | Notes |
|---|---|---|
| Torque (Continuous / Peak) | Project-specific after duty-cycle and cooling review | Peak limits depend on inverter phase current; continuous depends on thermal path. |
| Motor Constant (KV) | Winding dependent target set during electrical review | Adjusted via turn count to match target bus voltage and speed. |
| Electrical Interface | DC bus voltage, phase current, pole pairs, resistance, and inductance set per winding | Needed to match inverter limits, back EMF margin, and controller tuning. |
| Physical Dimensions | Project-specific OD, axial length, shaft, and flange envelope | Scalable by stator segmentation and single vs. dual-rotor topology. |
| Feedback / Brake Options | Hall sensors, encoder, resolver, temperature sensors, or holding brake review | Selected against control loop bandwidth, safety behavior, and integration space. |
| Cooling Methods | Natural Air, Forced Air, Liquid Jacket, Oil | Selection determines continuous power rating and environmental sealing. |
| Mass / Rotor Inertia | Project-specific after rotor disk, magnet carrier, shaft, and housing freeze | Required for acceleration estimates, balancing scope, and mechanical safety review. |
| IP Rating | Project-specific IP target after housing and seal review | Air-cooled and liquid or oil-cooled packages require different sealing validation. |
Use these checkpoints to turn a product-family discussion into a controlled sample and pilot-lot plan. The exact record set depends on the drawing, winding, rotor, cooling, and acceptance scope.
| Stage | Control Point | Buyer Evidence |
|---|---|---|
| RFQ freeze | Topology target: yokeless, slotless, segmented stator, or hybrid concept; Electromagnetic package data: phase count, pole count, voltage, and current limit | Revisioned RFQ, package envelope, torque-speed target, and CTQ list. |
| Manufacturing prep | Segment geometry, winding method, insulation system, and slot fill constraints; Back iron reduction tradeoffs versus structural and thermal stiffness | Material route, winding target, rotor or magnet retention method, and fixture plan. |
| Sample validation | Mass reduction target, Winding temperature | Resistance, hipot, no-load/back EMF, runout, balance, torque-speed, or thermal records as applicable. |
| Pilot handoff | Simulation concept is difficult to build repeatedly; Weight saving compromises stiffness or thermal transfer | Lot traceability, change record, packaging approval, and outgoing inspection rhythm. |
Baseline parameter matrices, STEP files, and PDF datasheets may be shared after RFQ context is confirmed. Torque-speed maps and back EMF charts depend on the selected winding, cooling path, and validation scope.
We can review research or prototype designs, but production quotation needs manufacturable drawings, tolerance assumptions, and acceptance criteria.
Often they require careful selection of laminations, SMC, insulation, potting, and structural components. The exact path depends on topology.
Inquiry Email
Please include application, peak/continuous torque, speed range, voltage/current limit, outer diameter, axial length, cooling method, quantity, and drawings or reference samples.
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+86 188 5797 1991
Share torque-speed, package, cooling, and sample quantity in the first message.