⚡ B2B MANUFACTURING | DRONE & BLDC MOTORS

Laminated Core: Precision-Engineered Stator Core for High-Torque Drone & Brushless Motors

⚠️ The core engineering bottleneck: Motor overheating, torque ripple, and short flight time often originate from a low-quality laminated core. Inefficient magnetic paths, excessive eddy currents, and poor stacking tolerances directly kill performance.

✅ Reenives: High-quality Drone Motor Stator Laminated Core Manufacturer in China delivers precision stacks with ultra-low iron loss (<10 W/kg), C5 epoxy insulation, and sub-0.03mm burr — proven to boost motor efficiency by 6‑10% in UAV and industrial BLDC applications.

📖 Technical Contents

1. What is a Laminated Core?
2. Classification by Material & Process
3. Critical Parameters & Data Sources
4. Applications: Drone, Robotics & Industrial BLDC
5. 5-Step Laminated Core Selection Guide
6. Technical FAQ – Laminated Core Insights
7. Custom Solutions & Global CTA
8. Dongguan Runlu Motor Technology Co., Ltd. (Reenives)

📌 1. What is a Laminated Core? (Stator Core Basics)

A laminated core (also known as stator core) is the stationary magnetic circuit in brushless motors. It consists of thin electrical steel sheets stacked and bonded/welded together to form teeth and slots for copper windings. The laminated construction minimizes eddy current losses and hysteresis, enabling high-frequency operation for drone motors (30,000‑80,000 RPM) and industrial servos. High-quality laminated cores feature precise stacking factor, uniform coating, and consistent magnetic properties — directly translating into thrust, thermal stability, and reliability.

High-quality laminated core stator stack for drone motor - Reenives

Figure 1: Precision laminated core with optimized slot geometry and C5 insulation, manufactured by Reenives.

🏷️ 2. Classification of Laminated Cores

By steel thickness: 0.20mm, 0.35mm, 0.50mm (0.20mm ideal for high-frequency drone motors).
By magnetic grade: M400-50A, 35W270, 20WV1200 (high permeability, low loss).
By coating type: C3 (organic standard), C5 (epoxy powder, high temp & corrosion resistant).
By stacking method: Interlocking (self-bonding) – consistent stacking factor; laser welding for extreme vibration resistance.
By geometry: Monolithic stator (OD 12‑100mm) for compact drones; segmented for large-diameter industrial motors.

📊 3. Critical Parameters & Verified Data (High-Quality Laminated Core)

All values measured in accordance with IEC 60404-2, GB/T 3655-2022 and Reenives in-house quality system (third-party verified).

Parameter	Value Range (Premium Grade)	Test Standard / Source
Material thickness	0.20mm / 0.35mm (±0.008mm)	Micrometer / ASTM A677
Core loss (P1.0/400)	≤ 9.8 W/kg (0.20mm) / ≤ 14 W/kg (0.35mm)	Epstein frame / IEC 60404-2
Magnetic flux density B50	≥ 1.68 T	Single strip tester
Stack height tolerance	±0.04mm (height ≤50mm) / ±0.06mm (above)	CMM / Reenives QA
Insulation coating type	C5 epoxy resin, >1300V dielectric strength	ASTM D149 / UL 1446
Burr height (max)	≤ 0.03mm (typically 0.02mm)	ISO 2768-m / Vision system
Operating temperature range	-40°C to 180°C (peak 200°C short-term)	Thermal chamber / Reenives validation

Data source: Reenives internal test report #RS-2512-09 & SGS certified (2025). Premium laminated cores demonstrate >25% loss reduction compared to generic stacks.

✈️ 4. Key Applications: Drone Motors & Beyond

High-quality laminated cores are essential for:

🚁 Drone & UAV propulsion (FPV racing, agricultural drones, eVTOL) – improved flight endurance, reduced ESC temperature.
⚙️ High-speed spindles (50,000+ RPM) – ultra-low iron loss for continuous operation.
🔧 Robotic servo actuators – smooth torque, minimal cogging.
🏭 Industrial BLDC fans, pumps & e-scooters – IE5 efficiency achievable.

Drone motor using laminated core stator - Reenives

Figure 2: Precision laminated core integrated into a high-thrust drone motor – optimized torque density and thermal management.

📐 5. How to Select the Right Laminated Core: 5 Engineering Steps

Step 1 – Define operating frequency
If motor PWM >20kHz, choose 0.20mm or thinner laminated core.

Step 2 – Geometric constraints
Specify outer/inner diameter, stack height, slot number. Provide 2D/3D drawing.

Step 3 – Thermal & insulation requirement
C5 epoxy coating mandatory for high-power drone climbing cycles >150°C.

Step 4 – Stack joining method
Interlocking for high-volume production; laser welding for high-G vibration.

Step 5 – Prototype & validation
Request free samples + core loss test report from Reenives; FEM simulation optional.

👉 Reenives engineering team provides free DFM analysis within 24 hours. Share your motor specifications → get a custom laminated core solution.

❓ 6. Technical FAQ – Laminated Core for Drone & BLDC Motors

Q1: What is the actual efficiency gain from a high-quality laminated core vs. generic stamped core?

Independent tests show that a premium laminated core (0.20mm, low loss steel) reduces core loss from ~14 W/kg to ≤9.8 W/kg at 1.0T/400Hz – a 30% reduction. In drone flight tests, this yields 6-8% longer hover time and 12-15°C lower stator temperature.

Source: Reenives dyno test report #D-2412 & IEC 60404-2

Q2: What stack height tolerances can Reenives guarantee for high-volume orders?

Standard tolerance: ±0.04mm for stack heights ≤50mm, ±0.06mm for taller stacks. For micro drone motors (height <15mm), we achieve ±0.03mm using precision stacking fixtures. 100% inspection via laser micrometer.

Source: Reenives SPC control plan Q-912

Q3: How does C5 epoxy coating perform under high thermal cycling?

C5 coating is rated for continuous 180°C and short peaks up to 200°C (thermal shock tested). Dielectric strength >1300V after 1,000h at 180°C. Interlamination resistance >100 Ω·cm² per ASTM A937. Ideal for high-power drone ESCs.

Source: UL 1446 certification & Reenives aging test

Q4: What is the maximum burr height allowed for reliable winding insulation?

Reenives maintains burr height ≤0.03mm (typically 0.02mm) using progressive dies with high-speed presses. This prevents insulation layer puncture during magnet wire winding, meeting ISO 2768-m fine grade.

Source: Reenives tooling maintenance standard

Q5: Do you offer custom laminated core designs for unique slot/pole combinations?

Yes. Reenives supports full private progressive tooling development. We have delivered 50+ custom laminated core geometries (12N14P, 24N28P, 18N20P, etc.) for drone and EVTOL clients. Sample making available after design approval.

Source: Reenives engineering record 2023-2025

Q6: What quality certifications and export documents does Reenives provide?

Reenives is ISO 9001:2025 certified, with full CE and RoHS compliance. Every laminated core shipment includes material certificate, dimensional report, and core loss test data. Export documentation supports 60+ countries.

Source: Reenives quality management system ISO 9001

🚀 7. Boost Your Motor Performance – Contact Reenives (Factory Direct)

⚡ High-quality laminated cores – bulk orders, private tooling, free engineering samples

Precision stator stacks with full traceability, short lead times, and global shipping. Whether for racing drones or industrial servos, Reenives delivers tailor-made solutions.

🌐 www.reenives-bldcmotor.com 💬 WhatsApp: +86-13377741885

📧 Email: linda_reenives@163.com – direct line to senior application engineer

🎯 Ask for free sample kit + magnetic simulation report for your prototype motor.

🏭 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 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!

Reenives: High-quality Drone Motor Stator Laminated Core Manufacturer in China – your trusted partner for high-reliability, low-loss motor cores. 📍 www.reenives-bldcmotor.com | WhatsApp: +86-13377741885 | Email: linda_reenives@163.com