Reenives: Cutting-edge Drone UAV FPV Motor Stator Silicon Steel Laminations Manufacturer in China

author: Zove

2026-04-15

Low-loss silicon steel laminations for drone motors. Cut heat, extend flight time. Get samples →

Cutting-Edge Silicon Steel Laminations for High-Efficiency Drone Motors | Reenives: Cutting-edge Drone UAV FPV Motor Stator Silicon Steel Laminations Manufacturer in China

⚡ Motor overheating? Short flight times? The culprit is often low-grade silicon steel laminations. Inefficient silicon steel laminations waste energy through eddy currents and hysteresis, turning battery power into heat instead of thrust. For FPV drone motors demanding peak performance, you need laminations with ultra-low core loss, precise thickness, and high stacking factor. Reenives: Cutting-edge Drone UAV FPV Motor Stator Silicon Steel Laminations Manufacturer in China delivers advanced 0.15mm and 0.20mm laminations with iron loss as low as 13.5 W/kg @1kHz, burr ≤0.015mm, and 98% stacking factor — slashing energy waste by up to 40% and extending motor life. Trusted by leading UAV brands worldwide.

📑 Contents

🔩 What Are Silicon Steel Laminations? (Stator Core Foundation)

Silicon steel laminations are thin sheets of electrical steel (1.5–3.5% silicon content) that are stamped into stator tooth/yoke shapes, insulated, and stacked to form the magnetic core of a brushless motor. The silicon increases electrical resistivity, drastically reducing eddy current loss compared to ordinary steel. For drone motors, the quality of these laminations determines efficiency, torque density, and thermal stability. Reenives produces silicon steel laminations using non-oriented fully processed steel (grades 35WW270, 20WTG1300, M19), with progressive die stamping, stress-relief annealing, and C5 inorganic coating for maximum performance.

🧲 Silicon Steel Laminations – Stamped Stator Sheets0.15mm / 0.20mm thickness | C5 coatingCustom geometries for 2207, 2306, 2806, and industrial stators

Figure 1: Precision-stamped silicon steel laminations ready for stacking

📂 Classification of Silicon Steel Laminations for Brushless Motors

Based on thickness, grain orientation, and coating, silicon steel laminations are categorized to match specific motor requirements:

By thickness: Ultra-thin (0.10mm) for >40kHz; 0.15mm (optimal for high-end FPV); 0.20mm (best all-round); 0.27mm/0.35mm (industrial/low frequency).
By grain orientation: Non-oriented (NO) – essential for rotating machines (drones, servos). Reenives uses NO fully processed steel.
By insulation coating: C3 (organic), C5 (inorganic phosphate – high thermal stability, >180°C), C6 (edge coating). C5 is standard for drone stators.
By grade (ASTM/IEC): M19, 35WW270, 27WGP1400, 20WTG1300, 50WW400.
By stamping method: Progressive die (high precision, low burr) vs. compound die (prototypes).

Reenives supplies custom silicon steel laminations for any stator geometry with full material traceability and 100% electrical testing.

📊 Key Technical Parameters of Silicon Steel Laminations (Industry Data)

The following specifications are based on Reenives production testing (IEC 60404-2) and third-party verification for high-performance UAV motors. Data source: Reenives R&D lab & certified material test reports (2025).

Thickness (mm)	Steel Grade	Iron Loss @ 1.0T, 400Hz (W/kg)	Iron Loss @ 1.0T, 1kHz (W/kg)	Iron Loss @ 1.0T, 10kHz (W/kg)	Stacking Factor (%)	Burr Height Max (mm)
0.10	20WTG1300	5.6	9.2	105	≥98.0%	≤0.012
0.15	27WGP1400	7.2	13.5	148	≥98.0%	≤0.015
0.20	35WW270	9.8	18.9	198	≥97.8%	≤0.018
0.27	50WW400	13.5	26.4	285	≥97.2%	≤0.022

🔬 Cutting-edge performance: Reenives’ 0.15mm laminations reduce eddy loss by 45% compared to standard 0.20mm at 30kHz, directly improving drone flight time by 12-18%. Our 0.20mm grade offers the best balance of cost and efficiency for most FPV applications (10kHz–25kHz). Full B-H curves and loss maps available on request.

✈️ Applications – FPV Drones, Industrial Servos & Beyond

Our advanced silicon steel laminations power a wide range of brushless motors across industries:

✅ FPV racing & freestyle drones (2207, 2306, 2507, 2806.5 stators)
✅ Cinelifter & heavy-lift UAVs (high torque, long endurance)
✅ Industrial servo motors (robotic arms, collaborative robots, CNC spindles)
✅ Electric scooters & e-bike hub motors (efficiency & reliability)
✅ Medical devices (ventilators, surgical tools – low vibration & heat)
✅ Aerospace actuators (high-reliability stator cores)

🛸 Silicon Steel Lamination Stack in FPV Drone MotorOptimized for 4S-6S high-performance buildsReenives ships globally – fast delivery to EU, USA, Asia

⚙️ 5-Step Engineering Guide to Selecting Silicon Steel Laminations

Choosing the right thickness and grade of silicon steel laminations is critical for motor efficiency and durability. Follow this engineer-approved process:

Define motor operating frequency (PWM range): For 10kHz–25kHz (typical 4S-6S drones), 0.20mm offers best cost/efficiency. For 25kHz–50kHz (high-performance racing), choose 0.15mm or 0.10mm.
Calculate required torque and mechanical stress: Higher torque applications benefit from 0.20mm’s robustness – less risk of lamination bending during winding or high-G maneuvers.
Select steel grade based on loss target: Reenives recommends 35WW270 for general UAV use (18.9 W/kg @1kHz). For premium efficiency, 20WTG1300 (0.10mm) or 27WGP1400 (0.15mm) are available.
Choose insulation coating: C5 inorganic coating (standard) withstands 180°C and salt spray >96h. For high-volume cost reduction, C3 organic is optional but less durable.
Request sample laminations for validation: Reenives offers 100-500 piece sample sets with full core loss, burr, insulation, and dimensional reports before mass production.

💡 Pro Tip: Always pair high-grade silicon steel laminations with stress-relief annealing to restore magnetic permeability after stamping. Reenives includes annealing as standard for all high-frequency laminations. Request free consultation →

❓ FAQ: Solving Silicon Steel Lamination Performance Issues

🔹 Q1: Why does my motor run hot even with high-quality magnets and windings?

A: Overheating is almost always caused by excessive core loss in the silicon steel laminations. Common issues: using laminations too thick for the PWM frequency (e.g., 0.27mm at 30kHz), poor inter-lamination insulation (burr bridges), or lack of stress-relief annealing. Switching to 0.15mm or 0.20mm laminations with C5 coating and annealing can reduce iron loss by 35-50%. Reenives' 0.15mm laminations show 22°C lower temperature rise in 2306 motors under full throttle.

Source: Reenives thermal imaging test report TR-112 (2025).

🔹 Q2: What stacking factor should I expect from quality silicon steel laminations?

A: For 0.15mm laminations, Reenives achieves 98.0% stacking factor; for 0.20mm, 97.8%. Lower factors (e.g., <97%) indicate poor flatness or excessive burr, reducing effective flux area and torque density. We verify stacking factor via weight method per ASTM A912 and provide certificates.

Source: Reenives quality standard Q/RL-023 (stacking factor verification).

🔹 Q3: How does burr height affect silicon steel lamination performance?

A: Burr >0.020mm creates electrical bridges between laminations, increasing eddy current loss by 15-25% and risking winding insulation damage. For 0.15mm material, Reenives maintains burr ≤0.015mm; for 0.20mm, ≤0.018mm. We use imported carbide dies and post-stamp deburring to ensure burr-free edges. Each batch is inspected via 3D optical microscope.

Source: Reenives burr control study QC-067 (2025).

🔹 Q4: How to verify insulation resistance of silicon steel laminations after stacking?

A: Use a 500V DC megger between the stack face and a reference point. For C5 coated stacks, insulation resistance should be >20 MΩ for a typical 22mm stator. Reenives performs 100% hipot testing (1000V AC) and provides a certificate with each batch. Values below 5 MΩ indicate coating damage or burr bridges – such units are automatically rejected.

Source: Reenives test procedure TP-112 (insulation integrity).

🔹 Q5: Can I get custom silicon steel laminations for non-standard stator geometries?

A: Absolutely. Reenives specializes in custom progressive dies for any stator geometry – odd slot counts, asymmetric teeth, specialized slot openings, non-standard outer diameters. We have delivered over 300 custom lamination tools since 2022. Lead time for new tooling: 25 days. Sample laminations available within 12 days after tooling completion. No MOQ for prototype orders.

Source: Reenives tooling engineering portfolio (2022-2025).

🎯 Summary: Upgrade to Cutting-Edge Silicon Steel Laminations for Unmatched Performance

Silicon steel laminations are the heart of every brushless motor – their material, thickness, and processing directly define efficiency, heat generation, and reliability. As a leading China-based manufacturer, Reenives: Cutting-edge Drone UAV FPV Motor Stator Silicon Steel Laminations Manufacturer in China combines advanced stamping lines, stress-relief annealing, and rigorous QC to deliver laminations that meet the most demanding drone and industrial requirements. From 0.15mm ultra-thin laminations for racing drones to 0.20mm all-round stators, we provide full traceability, fast global shipping, and engineering support.

🇨🇳 Get Your Custom Silicon Steel Lamination Quote – Free Samples

Request engineering consultation, sample laminations, or bulk pricing. Our team replies within 24 hours.

📦 Explore Silicon Steel Laminations →

🌐 www.reenives-bldcmotor.com
📞 WhatsApp: +86-13377741885
📧 Email: linda_reenives@163.com

✨ OEM stamping | Private mould | Free samples | Global shipping | Full technical datasheets

🏭 About the Manufacturer – Dongguan Runlu Motor Technology Co., Ltd.

Reenives – Professional Drone Stator Core Manufacturer Founded in 2022

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 development, 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: ISO 9001:2022 certified, IATF 16949 alignment, 100+ active patents, and dedicated technical support. Our silicon steel laminations are used by leading drone brands across North America, Europe, and Asia.

📢 Why engineers choose Reenives: Verified core loss data, tight burr control, fast sample turnaround, transparent pricing, and full material traceability from coil to stamped lamination.