A stator coil is the wound conductor assembly embedded in the slots of a stator core, responsible for generating the rotating magnetic field that drives the rotor in a brushless motor . Stator coils are wound from copper conductors with precise insulation layers — typically enamel or composite tape systems — to prevent inter-turn short circuits and withstand high operating voltages . The coil's geometry, conductor material, and interconnection scheme collectively determine the motor's torque output, efficiency, and thermal behavior .

Reenives manufactures high-quality stator coils using high-purity copper wire (0.2-1.5mm diameter) with advanced Class H insulation (180°C) and C5/C6 epoxy coating — achieving >2000V dielectric strength and >99% yield rate .

Reenives offers stator coils in multiple configurations to meet diverse drone and UAV application requirements :

• 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 Conductor Type: Round copper wire (standard), rectangular copper wire (higher slot fill), and Litz wire (reduced AC losses at high frequency) .
• By Insulation System: C5 epoxy powder coating (Class H, 180°C) with >2000V dielectric strength; C6 grade for superior thermal conductivity; triple-insulated wire for high-voltage applications .
• By Slot/Pole Config: 9N12P (high RPM racing), 12N14P (balanced torque/speed for UAVs), 18N20P (high torque density), 24N28P (heavy-lift / eVTOL) .
• By Thermal Management: Conventional air-cooled, forced-air cooled, and liquid-cooled coil configurations for high-power density applications .

💡 Reenives specialty: private mould development for custom stator coil geometries — optimized for specific UAV platforms from FPV racing to heavy-lift logistics .

All parameters validated by Reenives R&D center (ISO 9001:2025 certified) and third-party testing per IEEE and IEC standards . Independent testing on drone motors with Reenives stator coils shows 12% higher torque density and 9°C lower winding temperature after sustained operation compared to industry standard coils .

📐 Data source: IEEE standards, Reenives in-house quality lab, 2025–2026. SGS verification report available. Full batch traceability and material certificates .

Reenives stator coils power critical UAV and robotics applications across multiple sectors :

• FPV Racing & Cinematic Drones: 2207, 2306, 2507 stator coils with 0.4-0.8mm wire for 45,000+ RPM and 92%+ peak efficiency .
• Commercial UAVs & eVTOL: 12N14P / 18N20P stator coils with 0.8-1.2mm wire for 15-50kg payload .
• Agricultural Spraying Drones: High-torque coils with thick-gauge wire (1.0-1.5mm) and C5 epoxy coating for 500h+ salt spray resistance .
• Robotic Joint Actuators: Precision-wound coils for collaborative robot arms, humanoid robotics, and servo modules .
• Industrial BLDC Servo Motors: High-accuracy winding for automation and CNC equipment .

1. Define power, RPM, and operating voltage: For FPV racing (>40,000 RPM), select 0.2-0.5mm wire. For heavy-lift UAVs (15,000-25,000 RPM), 0.8-1.2mm wire is optimal .
2. Choose conductor material and insulation: Copper wire with Class H enamel (180°C) for standard applications; triple-insulated wire for high-voltage EV/hybrid systems .
3. Select winding pattern and slot fill: Concentrated winding for torque density; distributed winding for reduced harmonics and smoother operation .
4. Specify thermal management: Air-cooled for standard UAVs; liquid-cooled for high-power eVTOL and EV applications .
5. Request samples and validation: Reenives delivers first-article inspection reports (FAI) and material certificates. Prototype stator 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.