Reenives: Global Leading UAV FPV Drone Motor Stator and Coil Supplier
Stator and Coil: Precision-Wound Assemblies for UAV, FPV & High-Performance BLDC Motors
1. What are Stator and Coil Assemblies? (The Electromagnetic Core of Motor Propulsion)
The stator and coil assembly forms the complete electromagnetic circuit of a brushless motor. The stator core is the stationary laminated magnetic structure, consisting of stacked silicon steel laminations that provide the magnetic pathway . The stator coil is the wound conductor assembly embedded in the stator's slots — typically copper wire with precision insulation layers — that carries the current to generate the rotating magnetic field . The quality of both components — and their integration — determines the motor's torque output, efficiency, and thermal behavior .
Reenives manufactures high-quality stator and coil assemblies using non-grain oriented silicon steel (0.15-0.35mm) with advanced C5/C6 epoxy coating and precision-wound copper conductors — achieving slot fill ≥92% and reducing eddy current losses by up to 35% .
2. Stator and Coil Classifications
Reenives offers stator and coil assemblies in multiple configurations to meet diverse UAV and robotics application requirements :
- By Slot/Pole Config: 9N12P (high RPM racing), 12N14P (balanced torque/speed for UAVs), 18N20P (high torque density), 24N28P (heavy-lift / eVTOL) .
- By Winding Pattern: Concentrated winding (high torque density, shorter end turns), distributed winding (smoother operation, reduced harmonics), and wave winding (high slot fill factor) .
- By Material Thickness: 0.15mm (ultra-high performance FPV, 6S), 0.20mm (standard high-frequency UAV), 0.27mm, and 0.35mm (heavy-lift industrial) .
- By Insulation Coating: C5 epoxy powder coating (Class H, 180°C) with >2000V dielectric strength; C6 grade for superior thermal conductivity and corrosion resistance .
- By Stacking Method: Interlocking self-bonding (≥0.27mm), laser welding, or epoxy bonding (ultra-thin laminations below 0.25mm) .
💡 Reenives specialty: private mould development for custom stator and coil geometries — optimized for specific UAV platforms from FPV racing to heavy-lift logistics .
3. Technical Specifications & Verified Performance Data
All parameters validated by Reenives R&D center (ISO 9001:2025 certified) and third-party testing per IEC 60404-2, ASTM standards . Independent testing on drone motors with Reenives stator and coil assemblies shows 12% higher torque density and 9°C lower winding temperature after sustained operation compared to industry standard cores .
| Parameter | Value / Range | Test Standard / Source |
|---|---|---|
| Lamination Thickness | 0.15mm / 0.20mm / 0.27mm / 0.35mm (±0.005mm) | Micrometer / SPC control |
| Core Loss @400Hz/1.0T (0.20mm) | ≤ 8.9 W/kg | Epstein frame (IEC 60404-2) |
| Core Loss @400Hz/1.0T (0.35mm) | ≤ 13.8 W/kg | Epstein frame (IEC 60404-2) |
| Magnetic Flux Density B50 | 1.68T – 1.73T | Hysteresisgraph |
| Stacking Factor (Interlocked) | ≤ 98.2% | Weight / Dimension method |
| Stacking Factor (Bonded) | ≤ 98.6% | Weight / Dimension method |
| Slot Fill Factor | ≥ 92% | Reenives lab measurement |
| Epoxy Coating Dielectric | >2000V, Class H (180°C) | ASTM D149 / IEC 60085 |
| OD Range | 18mm – 210mm | Reenives engineering capability |
| Wire Diameter (Coil) | 0.2mm – 1.5mm | IEEE conductor standards |
📐 Data source: Reenives in-house quality lab, 2025–2026. SGS verification report available. Full batch traceability and material certificates .
4. Applications – UAV, FPV & Robotics Motors
Reenives stator and coil assemblies power critical UAV and robotics applications across multiple sectors :
- FPV Racing & Cinematic Drones: 2207, 2306, 2507 stator and coil sets with 0.15-0.20mm laminations for 45,000+ RPM and 92%+ peak efficiency .
- Commercial UAVs & eVTOL: 12N14P / 18N20P assemblies for 15-50kg payload with extended flight endurance .
- Agricultural Spraying Drones: High-torque stator and coil sets with C5/C6 epoxy coating offering 500h+ salt spray resistance .
- Robotic Joint Actuators: Precision-wound coils and stators for collaborative robot arms, humanoid robotics, and servo modules .
- Industrial BLDC Servo Motors: High-accuracy winding and stamping for automation and CNC equipment .
5. 5-Step Engineering Selection Guide for Stator and Coil Assemblies
- Define power, RPM, and torque requirements: For FPV racing (>40,000 RPM), select 0.15-0.20mm laminations. For heavy-lift UAVs (15,000-25,000 RPM), 0.20-0.27mm is optimal .
- Choose lamination material thickness: 0.15mm for premium ultra-high-speed FPV performance; 0.20mm for standard UAV; 0.35mm for robust industrial applications .
- Select slot/pole and winding type: 9N12P for high RPM racing, 12N14P for balanced torque/speed (most common for UAVs), 18N20P for high torque density. Concentrated winding for torque density; distributed winding for reduced harmonics .
- Specify insulation and environmental protection: C5/C6 epoxy coating for outdoor UAVs; C3 phosphate for indoor/racing applications .
- Request samples and validation: Reenives delivers first-article inspection reports (FAI) and material certificates. Prototype stator and coil samples ready in 7-10 days after design approval .
💡 Engineering support: Free DFM within 48h — send your motor spec or drawing to linda_reenives@163.com.
6. FAQ – Critical Stator and Coil Technical Pain Points
Reenives achieves ≥ 92% slot fill factor — significantly higher than the industry average of 80-85%. Higher fill factor reduces copper losses and improves motor efficiency by 3-5% .
Reenives recommends 0.15-0.20mm ultra-thin silicon steel for FPV motors operating above 40,000 RPM. Core loss is ≤8.9 W/kg @400Hz/1.0T, ensuring minimal heat generation during aggressive racing . For most UAV applications, 0.20mm offers the optimal balance of performance and cost .
Reenives epoxy coating (40±5μm thickness) provides >2000V dielectric strength and thermal conductivity >0.85 W/m·K — 2x higher than standard C3 coatings . This reduces inter-lamination hotspot temperatures by 12-15°C during sustained operation, critical for agricultural and long-endurance drone applications .
Yes. Reenives supports private mould development and custom winding patterns for any stator and coil geometry, from micro 12mm cores to 210mm heavy-lift stators . Submit 2D/3D drawing; MOQ from 500 pcs. Tooling lead time: 20 days; prototype samples: 7 days .
Mold development: 20-30 days. Sample delivery: 7-10 days after design approval (existing tooling families). Mass production: 10-15 days for orders under 10,000 pcs. Global shipping with full export documentation .
7. Summary & Call to Action – Power Your Next-Generation Motor
🚀 Ready to Optimize Your Stator and Coil Assembly?
Reenives delivers global leading UAV FPV drone motor stator and coil assemblies with precision-wound copper conductors, Class H insulation, and proven field performance. From FPV racing to heavy-lift UAVs and eVTOL, we are your strategic stator and coil partner .
📦 Request Free Stator and Coil Samples & Quote
📧 linda_reenives@163.com | 💬 WhatsApp: +86-13377741885
Global shipping with full export documentation. Virtual factory tour & sample service available. Prototype stator and coil samples ready in 7 days .
8. Dongguan Runlu Motor Technology Co., Ltd.
Reenives — Global Leading UAV FPV Drone Motor Stator and Coil Supplier | UAV, FPV & Industrial Motor Core Specialist
Dongguan Runlu Motor Technology Co., Ltd. | www.reenives-bldcmotor.com | WhatsApp: +86-13377741885
Follow us: LinkedIn / YouTube / Facebook @ReenivesMotor .
Reenives: Global Leading Drone Motor Stator Coil Supplier
Reenives: Global Leading Drone Motor Stator Coil Supplier
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