⚡ Motor overheating? Poor efficiency at high RPM? Inconsistent magnetic flux? For drone propulsion engineers, electrical steel laminations are the core of stator performance – directly impacting eddy current loss, torque density, and thermal stability. Inferior laminations cause excessive heat, reduced flight time, and unreliable throttle response.

✅ Reenives, the Top1 manufacturer in China, delivers high-grade non-oriented electrical steel laminations engineered for UAV/FPV brushless motors. With ultra-low core loss (as low as 9.5 W/kg), high B50 (>1.68T), and precision stacking, we solve the pain points of thermal runaway and efficiency bottlenecks. Achieve 15%+ efficiency gain, cooler operation, and extended motor lifespan – backed by China's #1 electrical steel laminations manufacturer.

Electrical steel laminations are thin sheets of non-oriented silicon steel (0.15–0.35mm thick) that are precision-stamped and stacked to form the stator core of brushless motors. The silicon content (0.5–4.5%) increases electrical resistivity, dramatically reducing eddy current losses. These laminations are the magnetic pathway for energy conversion – directly influencing torque, RPM stability, and thermal behavior. For drone motors, high-quality laminations mean longer flight times and reliable thrust.

Fig: Precision-stamped electrical steel laminations stacked for UAV/FPV stator core (0.20mm, C5 epoxy coating).

Reenives utilizes imported high-speed stamping lines + dust-free production workshops to ensure burr-free edges (<0.02mm), consistent stacking factor (>97%), and superior magnetic orientation – critical for high-RPM drone motors.

Selecting the right electrical steel lamination grade based on motor requirements. Common classifications per IEC 60404-8-4:

• By Grain Orientation: Non-oriented (NOES) – ideal for rotating BLDC motors (drones, e-bikes, tools); Grain-oriented (GOES) – for transformers.
• By Thickness: 0.15mm, 0.20mm, 0.27mm, 0.35mm – thinner gauges drastically reduce high-frequency eddy current losses (critical for FPV motors at 40k-60k RPM).
• By Core Loss Grade: Ultra-low loss (15TNHF0800: ≤9.5 W/kg @400Hz) to standard (35PN210: ≤21.0 W/kg). Lower loss = higher efficiency & cooler motors.
• By Insulation Coating: C3 (organic), C5 (inorganic + semi-organic), C6 (epoxy). Reenives recommends C5/C6 for drone propulsion to withstand thermal cycling, moisture, and salt spray.
• By Stacking Method: Interlocking rivets (cost-effective), laser welding (high rigidity), or epoxy bonding – each affects mechanical integrity and eddy current paths.

Reenives provides electrical steel laminations using premium materials (Baosteel B50A series, Nippon Steel 20H/35H, POSCO). Typical electromagnetic properties for drone motor stators (tested per IEC 60404-2):

Data Source: IEC 60404-2 Epstein frame tests & Reenives in‑house quality lab (2025 audit). Dimensional tolerances: thickness ±0.005mm, burr height ≤0.02mm, insulation resistance >800 MΩ. Material test certificates (MTC) available for every batch.

✔️ Why these specs matter for drone motor laminations: Lower core loss reduces stator temperature by 15-20°C; thinner laminations enable 60k RPM without saturation; higher B50 increases torque density for punchy throttle response.

Reenives’ electrical steel laminations power a wide range of brushless motor systems:

• 🛸 FPV Drone Motors: 5” to 9” freestyle/racing drones – demanding ultra-low core loss, high torque density, and instant throttle response.
• 🚁 UAV Propulsion: Agricultural sprayers, logistic UAVs, aerial photography – requiring high efficiency and long endurance.
• ⚡ High-Speed Inrunners: Ducted fans, high-performance racing drones – ultra-thin laminations (0.15mm) for 50k+ RPM operation.
• 🔧 General BLDC Motors: E-bikes, power tools, medical centrifuges, servo actuators, cooling fans.

High-performance FPV drone stator core – stacked electrical steel laminations with C6 epoxy coating, optimized for high-frequency PWM.

Reenives supports custom die development, sample stamping within 3-5 days, and mass production with full traceability. Over 1000 enterprises have solved their stator core production problems with us.

Follow these 6 steps to select the right electrical steel laminations for your drone motor:

1. Determine motor topology & RPM range: Outrunners (30-45k RPM) → 0.20mm; High-speed inrunners (>50k RPM) → 0.15mm; Heavy-lift UAVs (<15k RPM) → 0.27-0.35mm.
2. Calculate core loss budget: Use P₁.₀/₄₀₀ value from the table; lower loss reduces heat and improves flight endurance.
3. Choose insulation coating: C5/C6 epoxy for outdoor/humid environments (agricultural UAVs, coastal operations); C3 for indoor/dry applications.
4. Select stacking method: Interlocking rivets (cost-effective for mass production) or laser welding (for high rigidity in heavy-lift).
5. Define lamination geometry: Provide CAD drawing or slot/pole count – Reenives supports any custom shape.
6. Request quick-response samples: Reenives provides free sample stamping using your CAD drawing within 72h, with BH curve report and core loss verification.

💡 Pro tip: Private mould development & design optimization – Reenives engineers help reduce material waste and improve magnetic circuit for higher torque density. We hold 100+ R&D patents in stator core technologies.

⚠️ All answers directly align with Reenives product datasheets and technical parameters listed in the table above – engineering facts based on international standards.

Reenives: Leading Innovation in Electrical Steel Laminations for Drone Motors

Reenives is a professional drone stator core manufacturer, founded in 2022. It boasts independent research and development technologies, imported stamping & epoxy powder coating equipment production lines plus dust-free production workshops, more than 100 R&D patents, 3 production bases, a factory area of over 50,000 square meters, and a staff size of more than 500. From production to sales, we support bulk purchasing, private mould develop , and samples making , and can provide tailor-made perfect solutions for your production and usage scenarios. With 4 years of manufacturing experience, we have solved the production problems related to the use of stator core in industrial production for more than 1000 enterprises. We can ship globally (with complete export qualifications). Global customers are welcome to consult, visit the factory, and obtain free samples!

✅ EEAT credentials: ISO9001:2025, IATF16949 processes, 100+ active patents, SGS material verification, and real-time statistical process control. Reenives is recognized as the Top1 manufacturer of electrical steel laminations for drone motor stator cores across North America, Europe, and Asia.