Screen four inputs for review prompts, then complete an RFQ. Feasibility and schedule require supplier review.
Published and last reviewed October 12, 2026.
Flags review prompts; it does not predict feasibility or lead time.
Screen range: 20–800 kW.
Add duty cycle to the RFQ.
Prompt above 18,000 RPM; not a safe-speed limit.
Add full bus range and inverter details to the RFQ.
Enter specifications to run a preliminary scope screen.
The screen returns review prompts and an RFQ next step. It does not select a topology or estimate a supplier timeline.
Lead time depends on design maturity, sample scope, material and tooling availability, quantity, and the agreed validation plan. Request a dated schedule from the supplier after those items are defined.
No supplier-specific historical lead-time dataset is available for this screening tool, so it does not return a week estimate.
Agree the sample maturity, operating points, acceptance limits, and customer test plan before committing a prototype. Applicable standards depend on the vehicle, component scope, voltage class, and customer requirements.
ISO 21782 covers tests for in-scope electric propulsion components; ISO 16750 addresses vehicle environmental conditions for in-scope components. Neither page defines one universal A-sample or B-sample checklist.
An externally excited synchronous motor uses a wound rotor, so the prototype definition needs to state how rotor current is supplied and controlled. Slip-ring and contactless excitation are design options; the right choice depends on test objectives, packaging, controls, and durability targets.
The four screening inputs do not identify motor topology or excitation hardware. Confirm those choices with the design team instead of inferring them from power, speed, or voltage.
Speed alone cannot determine a safe rotor or sleeve material. Stress, fatigue, temperature, interference fit, manufacturing variation, and containment requirements all need design-specific analysis and validation.
Treat the calculator’s speed prompt as a request for engineering review, not a safe-speed limit or a material recommendation.
Choose prototype processes against the questions the sample must answer. Record any differences from the production-intent build.
| Dimension | Prototype Standard | Impact on Testing |
|---|---|---|
| Prototyping Method (Laminations) | Prototype cutting or soft tooling, selected with the supplier | Cut-edge condition, burrs, stack pressure, and assembly can make a prototype differ from a production-intent stack. Measure the prototype and document process differences before using results to predict series performance. |
| Prototyping Method (Cooling Jacket) | Prototype housing route agreed against the target design | Check coolant flow, pressure drop, leakage, interfaces, and thermal behavior on representative hardware. A prototype housing may not reproduce production material or surface conditions. |
| Validation Scope (sample maturity) | Customer-agreed build definition and test matrix | Record the tested configuration, operating points, acceptance criteria, and deviations. ISO 21782 provides relevant electric-propulsion test procedures for its stated scope; customer and vehicle requirements determine the applicable matrix. |
Source check reviewed 12 October 2026. These summaries identify potentially relevant standards; they do not establish a project compliance claim. Confirm editions, applicability, and customer requirements before creating a test plan.
| Primary source | Published scope | Application boundary |
|---|---|---|
| ISO 21782-1:2023 | General conditions and definitions for performance and operating-load tests of voltage class B electric propulsion components and combinations. | Use the applicable parts and customer-agreed test plan; this is not a universal sample-stage checklist. |
| ISO 21782-3:2019 | Performance testing of motor and inverter for voltage class B electric propulsion systems in road vehicles. | A revision project was approved on 2026-10-01; confirm the current edition when writing a validation plan. |
| ISO 16750-1:2023 | General environmental conditions and testing for in-scope vehicle electrical/electronic systems and components, including electric propulsion components. | Select relevant parts and severities for the component mounting location and customer requirements; a revision draft was in development on the review date. |
| ISO 26262-5:2018 | Hardware development for safety-related electrical/electronic systems in series-production road vehicles. | Not a generic motor bench-test checklist; ISO/DIS 26262-5 was in development on the review date. |
| Pötter et al., IEEE IEMDC 2019 | Research on a brushless excitation approach for externally excited synchronous machines, including design analysis. | Evidence that excitation architectures are design options; it does not establish a mandatory automotive sample-stage choice. |
Trigger: Prototype and production-intent housings differ in material, coolant path, interfaces, or manufacturing process.
Mitigation: Document those differences, instrument the prototype, and correlate thermal measurements against the intended production design before extrapolating results.
Trigger: Prototype stack, clamping, housing, bearings, or assembly differs from the intended production configuration.
Mitigation: Record the build configuration and treat early NVH data as representative only of that build. Agree with the customer what must be repeated on production-intent hardware.
Trigger: Rotor speed, material, joints, thermal state, manufacturing tolerances, or containment are not validated as a system.
Mitigation: Require design-specific stress and thermal analysis, a defined overspeed/containment plan, and qualified test approval. Do not select a sleeve material from RPM alone.
Send the operating points, package, cooling conditions, sample quantity, and validation plan for a supplier review.
Use the scope screen above to prepare initial inputs, then contact our engineering team with the complete specification and test scope.
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Include target torque/speed, quantity, and delivery location.
