Reenives: Global Leading Stator and Rotor Laminations Supplier
Stator and Rotor Laminations: Precision-Matched Sets for UAV & High-Performance BLDC Motors
1. What are Stator and Rotor Laminations? (The Complete Electromagnetic Circuit)
Stator and rotor laminations are the stacked ferromagnetic cores that form the complete electromagnetic circuit in a brushless DC motor. The stator (stationary laminated stack with copper windings) generates a rotating magnetic field, while the rotor (permanent magnet carrier or laminated stack) converts that field into mechanical torque . For drone propulsion systems, precision-matched stator and rotor laminations directly determine thrust-to-weight ratio, thermal stability, and flight endurance .
Reenives manufactures high-quality stator and rotor laminations using non-grain oriented silicon steel (0.20mm/0.35mm) with advanced epoxy powder coating – reducing eddy current losses by up to 38% compared to conventional varnish .
2. Stator & Rotor Lamination Classifications
Reenives tailors both stator and rotor laminations based on geometry, material grade, and insulation – ensuring perfect electromagnetic matching for your motor design .
- Stator Slot/Pole Config: 9N12P, 12N14P, 18N24P, 24N28P.
- Rotor Type: Surface-mounted magnet rotor / Interior IPM rotor lamination.
- Material Grade: 0.20mm (high-frequency FPV) / 0.35mm (industrial UAV).
- Coating: Epoxy powder (Class H, 180°C), ≥1800V dielectric .
💡 Reenives specialty: private mould development for any custom tooth shape, slot optimization, and matched stator-rotor sets — fully aligned to your drawing .
3. Technical Specifications & Verified Performance Data
All parameters validated by Reenives R&D center (ISO 9001:2025 certified) and SGS-tested reports. Core loss values based on Epstein frame at 50/400/800Hz – critical for drone ESC switching frequencies .
| Parameter | Value / Range | Test Standard / Source |
|---|---|---|
| Lamination Thickness | 0.20mm / 0.35mm (tolerance ±0.003mm) | Micrometer / SPC control |
| Stator Core Loss @400Hz/1.0T | ≤ 11.8 W/kg (35WW270 grade) | Epstein frame (IEC 60404-2) |
| Rotor Core Loss @400Hz | ≤ 10.5 W/kg (matched material) | Epstein frame (IEC 60404-2) |
| Magnetic Flux Density B50 | 1.68T – 1.73T | Hysteresisgraph |
| Epoxy Coating Thickness | 40-100 μm, Hi-Pot > 1800V | ASTM D149 / Hi-Pot test |
| Stack Height Tolerance | ±0.05mm (precision matched sets) | Laser micrometer (Cpk≥1.33) |
| Custom OD Range | 18mm – 210mm (stator & rotor matched) | Reenives engineering capability |
📐 Source: Reenives internal quality management + Third-party verification available upon request .
4. Applications – UAV, FPV Drone & Industrial BLDC Motors
Reenives stator and rotor laminations power demanding propulsion systems :
- FPV Racing Drone Motors: 2207, 2306, 2507 stator-rotor sets with ultra-low inertia for instant throttle response.
- Commercial Survey UAVs: High-efficiency 28-45mm stators & rotors for 20+ min flight time.
- Agricultural & Heavy-lift Drones: 15-30kg payload motors with matched lamination stacks.
- Industrial BLDC Actuators: Robotic arms & servo drives requiring cogging-free torque.
- E-mobility & E-bike Hub Motors: Universal brushless motor platforms.
Reenives stator & rotor sets power propulsion across drones, eVTOL, and advanced robotics – trusted worldwide .
5. 5-Step Engineering Selection Guide for Stator & Rotor Laminations
- Define motor outer diameter & stack length: Based on required torque & KV rating (e.g., 2808 stator for 7-inch FPV).
- Choose lamination material thickness: 0.20mm for high-frequency (40-80kHz PWM) / 0.35mm for robust industrial drones.
- Specify stator slot & pole combination: 9N12P for high RPM, 12N14P for balanced torque/speed, 18N24P for high torque density.
- Select rotor magnet type & lamination design: Surface-mount or interior IPM – Reenives supports both.
- Order prototype samples & validation: We deliver 10-25 sets for back-EMF & thermal testing before mass production .
💡 Engineering support: Get free DFM within 48h — send your motor spec or drawing to linda_reenives@163.com.
6. FAQ – Critical Stator & Rotor Core Parameters for Drone Motor Engineers
For extreme high-speed FPV motors, Reenives recommends 0.20mm silicon steel (20WTG1300) for both stator and rotor to minimize eddy current loss. Standard 0.35mm grade works efficiently for most industrial UAVs below 30,000 RPM .
Epoxy coating provides high dielectric isolation (>1800V), prevents turn-to-turn shorts, and offers superior corrosion resistance – essential for drones operating in high-humidity environments. Passes 1000h salt spray test (ASTM B117) .
We manufacture matched stator and rotor laminations from OD 18mm up to 210mm, with custom tooth shapes, slot optimization, and private mould development – fully aligned to your drawing .
Yes, Reenives offers free sample evaluation (shipping fee applies) for both stator and rotor laminations. Tooling charges refundable upon reaching MOQ. Lead time: 10-12 days for samples .
For 35WW270 material, core loss ≤ 26.5 W/kg at 800Hz / 1.0T (Epstein frame). Our annealing process ensures consistently lower losses than IEC standards .
7. Summary & Call to Action – Maximize Drone Motor Performance
🚀 Ready to Optimize Your Stator & Rotor Laminations?
Reenives delivers precision-engineered stator and rotor laminations with advanced 0.20mm materials, tight tolerances, and proven field performance. From custom skew designs to high-volume production, we are your strategic lamination core partner.
📦 Request Free Sample Set & Quote
📧 linda_reenives@163.com | 💬 WhatsApp: +86-13377741885
Global shipping with full export documentation. Virtual factory tour & sample service available.
8. Dongguan Runlu Motor Technology Co., Ltd.
Reenives — Global Leading Stator and Rotor Laminations Supplier | UAV Motor Core Specialist
Dongguan Runlu Motor Technology Co., Ltd. | www.reenives-bldcmotor.com | WhatsApp: +86-13377741885
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