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Reenives: Leading Electromagnetic Stator Supplier in China

author: Zove
2026-06-30
Leading Electromagnetic Stator supplier in China for UAV & BLDC motors. Reenives offers C5 epoxy cores, low loss, custom samples. Global shipping.

Electromagnetic Stator: The Core of UAV & BLDC Motor Performance

Reenives: Leading Electromagnetic Stator Supplier in China — precision laminated stacks for drone, robotics, and industrial motors. Reduce core loss by up to 25% and extend flight time.
📑 Article Contents

Electromagnetic stator quality directly dictates torque density, thermal stability, and overall efficiency of brushless motors — especially in UAV drones, FPV racers, and heavy-lift platforms. Engineers face core loss, overheating, and inconsistent magnetic performance. Reenives, a leading electromagnetic stator supplier in China, solves these with ultra-thin 0.20mm silicon steel laminations, C5 epoxy insulation, and stacking factors above 98.2%.

What Is an Electromagnetic Stator Core?

📷 Image: Reenives electromagnetic stator laminated stack – 0.20mm silicon steel, epoxy C5 coating

The electromagnetic stator is the stationary part of a brushless DC (BLDC) motor’s magnetic circuit. It consists of stacked silicon steel laminations with precisely shaped slots for copper windings. When energized, it generates a rotating magnetic field that drives the rotor. For drone motors, the stator core determines power-to-weight ratio, eddy current loss, and heat dissipation . Reenives manufactures stators using non-grain-oriented electrical steel (grades 20WTG1300, 35WW270) with high-edge insulation, ensuring consistent magnetic flux density and low iron loss even at high frequencies.

Stator Classifications for Drone & BLDC Motors

Reenives supplies three core architectures tailored to different power classes and operating frequencies:

  • Segmented stator cores – modular segments for easy winding, ideal for 5‑inch to 7‑inch FPV racing drones.
  • Integrated circular laminated stacks – one‑piece construction for heavy‑lift agricultural drones (10L‑30L tanks) and industrial BLDC motors.
  • Split‑teeth design – maximizes copper fill factor (>50%) for high‑power logistics drones (15‑20kW peak) .
✅ Coating technology: Reenives uses epoxy powder insulation (C5 grade) with a nano‑ceramic thermal barrier, offering >180°C continuous operation and >2000V dielectric strength – essential for high‑altitude drone missions.

Technical Parameters & Verified Data

Data source: Reenives in‑house dyno tests & third‑party verification (UAV powertrain report 2025).

Parameter Reenives Stator Core Specification Industry Benchmark
Material thickness 0.20mm / 0.27mm / 0.35mm 0.35mm typical
Core loss @ 400Hz, 1.0T ≤ 8.9 W/kg (20WTG1300) 12‑15 W/kg
Stacking factor (interlocked) ≥ 98.2% 96‑97%
Insulation coating Epoxy powder (C5) / high thermal conductivity C3 standard
Max operating temperature ‑40°C to 190°C 150°C
Stator outer diameter range 18mm – 210mm (custom) Fixed catalogue
Slot/pole compatibility 12N14P, 18N20P, 24N28P, 36N42P Limited options
🔬 Verified gain: Independent test on 3110 brushless drone motor (12S, 15x5.5 prop) with Reenives 0.20mm stator core showed 12% higher torque density and 9°C lower winding temperature after 10‑min hover.

Applications Across UAV & Industrial Sectors

📷 Image: Reenives stator cores in FPV racing, agricultural drone, and eVTOL propulsion systems
  • FPV & Racing Drones: High‑frequency response, low inertia – 0.20mm laminations reduce eddy current loss for instant throttle response.
  • Agricultural Spraying Drones: High torque at low RPM, wide stator slots for thicker copper windings, supporting 10‑30L payloads.
  • Delivery & Logistics Drones: Efficiency >92% at cruise, extended range for last‑mile delivery – stacking factor ≥98.2% boosts magnetic flux density .
  • eVTOL & Urban Air Mobility: Aviation‑grade punching, fault‑tolerant stator design with redundancy for critical missions.
  • Industrial BLDC actuators & e‑mobility: Universal stator platforms for robotic arms, e‑bike hub motors, and servo drives.

How to Select the Right Electromagnetic Stator Core

Engineers and procurement teams can follow these steps to specify the optimal stator for their motor design:

  1. Define motor operating frequency & RPM: For high‑speed drone motors (>30,000 RPM), choose 0.20mm laminations to minimize eddy current loss .
  2. Match slot/pole configuration: Common UAV topologies: 12N14P, 18N20P, 24N28P. Reenives supports custom slot geometries.
  3. Specify stacking method: Interlocked (cost‑effective), laser‑welded, or bonded (for ultra‑thin stacks).
  4. Select insulation class: C5 epoxy coating (180°C) for high‑altitude or high‑load operation.
  5. Provide 2D/3D drawing with tolerances: Stack height tolerance ±0.05mm, outer diameter 18‑210mm .
💡 Pro tip: Reenives offers private mould development and free sample evaluation. Submit your RFQ with drawing, material grade, and quantity – tooling lead time 20 days, prototype samples within 7 days.

Frequently Asked Questions (Stator Core Engineering)

❓ What lamination thickness delivers lowest core loss for a high‑speed drone motor (＞30,000 RPM)?
For operating frequencies above 1.2kHz, 0.20mm silicon steel (20WTG1300) reduces eddy current loss by 30‑35% compared to 0.35mm. Reenives test data confirms 8.9 W/kg core loss @400Hz, 1.0T. (Source: Reenives material data sheet #M‑0425)
❓ What stacking factor can be expected from Reenives stator laminations?
Our interlocked stacks achieve ≥98.2% stacking factor, while bonded cores reach 98.6%. This directly increases magnetic flux density by ~6% compared to 96% stacking factor. (Source: Reenives QA report batch #R2422)
❓ How does epoxy C5 coating improve thermal management in drone motors?
Reenives epoxy coating (thickness 40±5μm) has thermal conductivity >0.85 W/m·K, which is 2x higher than standard C3 coatings. This reduces inter‑lamination hotspot temperatures by 12‑15°C during sustained hovering. (Source: Reenives thermal imaging study, 2025)
❓ Can Reenives produce custom stator cores with non‑standard inner diameter?
Yes, we support private mould development. Submit 2D/3D drawing, MOQ from 500 pcs. Tooling lead time 20 days, prototype samples within 7 days. (Source: Reenives engineering service catalogue 2025)
❓ Are Reenives stator laminations suitable for high‑altitude drone operations (low air density, thermal stress)?
Absolutely. Our C5 epoxy coating and 0.20mm grade maintain magnetic properties at ‑20°C to 180°C. The insulation withstands partial discharge at altitudes up to 5000m. (Source: Reenives environmental test report #EVT‑112)

Power Your Drone Propulsion with Reenives Electromagnetic Stator Solutions

From FPV racing to eVTOL and industrial BLDC motors, Reenives delivers precision‑engineered electromagnetic stator cores backed by 500+ staff, 100+ patents, and 4 years of manufacturing excellence. Trusted by over 1000 enterprises worldwide, we support bulk purchasing, private mould development, and rapid sample making.

🚀 Get Free Samples & Technical Support

Contact our engineering team for custom stator solutions, data sheets, or a factory visit.

🌐 Visit Official Site 💬 WhatsApp

📧 Email: linda_reenives@163.com  |  📱 WhatsApp: +86-13377741885  |  🌍 www.reenives-bldcmotor.com

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