🔧 B2B MANUFACTURING | DRONE MOTOR CORE

Ultra-thin 0.2mm Laminated Core: The Key to High-Efficiency Drone Motors & Advanced BLDC

⚡ The engineering bottleneck: Motor overheating, limited flight endurance, and torque ripple often trace back to the laminated core. Standard 0.35mm cores suffer excessive eddy current losses at high PWM frequencies (>30kHz).

✅ Reenives: Ultra-thin 0.2mm Drone Motor Laminated Core Stator Factory in China delivers precision-engineered cores with ultra-low iron loss, C5 insulation, and sub-0.03mm burr — proven to boost motor efficiency by up to 8% in UAV applications.

📋 Technical Contents

1. What is a Laminated Core? (0.2mm Advantage)
2. Classification & Material Selection
3. Engineering Parameters & Data Sources
4. Applications: Drone, Robotics & Industrial BLDC
5. 5-Step Laminated Core Selection Guide
6. Technical FAQ – 0.2mm Laminated Core Insights
7. Custom Solutions & Global CTA
8. Dongguan Runlu Motor Technology Co., Ltd. (Reenives)

📌 1. What is a Laminated Core? (0.2mm Ultra-thin Technology)

A laminated core (or stator core) is the stationary magnetic circuit in brushless motors, assembled from multiple layers of electrical steel. By reducing core thickness to 0.2mm, manufacturers drastically decrease eddy current losses at high frequencies. For drone motors operating at 30,000–80,000 RPM, a 0.2mm ultra-thin laminated core provides superior magnetic flux density with minimal hysteresis, directly translating into longer flight times and lower operating temperatures compared to conventional 0.35mm or 0.5mm stacks.

0.2mm laminated core stack for drone motor - Reenives factory

Figure 1: Ultra-thin 0.2mm laminated core with C5 coating, designed for high-frequency UAV brushless motors (Reenives proprietary tooling).

🏷️ 2. Classification of Laminated Cores

By steel thickness: 0.20mm, 0.15mm (ultra-thin for >50kHz), 0.35mm (general industrial).
By magnetic grade: M800-50A, 35W270, 20WV1200 (high permeability).
By coating type: C3 (standard organic) / C5 epoxy powder coating (high temp & corrosion resistance).
By stacking method: Interlocking (self-bonding) – consistent pressure; laser welding for extreme vibration.
By geometry: Monolithic stator (OD 12–80mm) for drone motors; segmented for large-diameter industrial motors.

📊 3. Critical Parameters & Verified Data (0.2mm Laminated Core)

All values measured per IEC 60404-2 and GB/T 3655-2022, sourced from Reenives in-house lab & SGS reports.

Parameter	Value (0.2mm Grade)	Standard / Source
Material Thickness	0.20mm ±0.008mm (0.15mm on request)	Micrometer / ASTM A677
Core Loss (P1.0/400)	≤ 9.6 W/kg (typical 9.2 W/kg)	Epstein Frame / IEC 60404-2
Magnetic Flux Density B50	≥ 1.69 T	Single Strip Tester
Stack Height Tolerance	±0.04mm (≤50mm), ±0.06mm (>50mm)	CMM / Reenives QA
Insulation Coating	C5 epoxy, >1400V dielectric strength	ASTM D149, UL 1446
Burr Height (Max)	≤ 0.03mm	ISO 2768-m / Vision system
Operating Temperature	-40°C to 180°C (short peak 200°C)	Thermal cycle test

Data source: Reenives test report #RS-2408-12 & SGS certified (2025). Core loss reduction >25% vs conventional 0.35mm laminated cores.

✈️ 4. Key Applications: Drone Motors & Beyond

0.2mm ultra-thin laminated cores maximize performance in:

🚁 Drone propulsion (FPV racing, agricultural UAV, eVTOL) – significant flight time gain, lower ESC temperature.
⚙️ High-speed spindles (50k+ RPM) – minimal iron loss for continuous operation.
🔧 Robotic servo actuators – smooth torque, low cogging.
🏭 Industrial BLDC fans & pumps – meets IE5 efficiency targets.

Drone motor assembly using 0.2mm laminated core stator

Figure 2: 0.2mm laminated core integrated into a high-end drone motor – optimized cogging torque and thermal performance.

📐 5. How to Select the Right 0.2mm Laminated Core: 5 Engineering Steps

Step 1 – Frequency range
If PWM >30kHz, mandatory 0.2mm or thinner to avoid excess eddy loss.

Step 2 – Outer/Inner dimensions
Define stator OD, ID, stack height, slot number. Share 2D drawing.

Step 3 – Thermal requirement
C5 epoxy coating essential for drone climbing cycles (>150°C).

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

Step 5 – Prototype validation
Request free samples & core loss test report from Reenives factory.

👉 Reenives engineers provide free DFM analysis within 24h. Contact us for your 0.2mm laminated core project.

❓ 6. Technical FAQ – 0.2mm Laminated Core for Drone & BLDC Motors

Q1: What efficiency gain can I expect moving from 0.35mm to 0.2mm laminated core?

Based on IEC 60404-2 at 1.0T/400Hz, 0.2mm grade reduces core loss from ~14 W/kg to ≤9.6 W/kg (~31% reduction). In drone flight tests (hovering), this translates to 6-8% longer endurance and 15°C lower stator temperature.

Source: Reenives comparative study & UAV real-condition dyno

Q2: What stack height tolerance does Reenives guarantee for 0.2mm laminated cores?

Standard tolerance ±0.04mm for heights ≤50mm; ±0.06mm for taller stacks. For high-precision micro drone motors, we can achieve ±0.03mm with selective assembly. All stacks are 100% measured using laser micrometer.

Source: Reenives SPC control plan Q-887

Q3: Can C5 coating withstand 200°C spikes? What is insulation resistance?

Yes, C5 epoxy coating is rated for continuous 180°C and withstands 200°C for short periods (thermal shock test). Dielectric strength >1400V; interlamination resistance >100 Ω·cm² after 1000h heat aging. Proven for high-power drone ESCs.

Source: UL recognized, Reenives material certification

Q4: What is the typical burr height for Reenives 0.2mm laminated cores?

Maximum burr ≤0.03mm, typically 0.02mm on high-silicon steel. Measured via optical edge inspection every 2 hours. Meets ISO 2768-m fine grade, essential for winding insulation reliability.

Source: Reenives stamping process control

Q5: Do you support custom laminated core design for unusual slot/pole combinations?

Absolutely. Reenives offers full private progressive tooling development. We have delivered 50+ custom geometries (12N14P, 24N28P, etc.) for drone and EVTOL clients. Sample making starts after design approval.

Source: Reenives engineering record

Q6: What export certifications and quality system does Reenives hold?

We are ISO 9001:2025 certified, with full CE and RoHS compliance. Our 0.2mm laminated cores pass vibration, salt spray, and thermal cycling tests per GB/T 2423. Export documentation for 60+ countries.

Source: Reenives quality management system

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

⚡ 0.2mm ultra-thin laminated cores – volume orders, private tooling, free engineering samples

High-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 support for engineers & purchasers

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

🏭 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: Ultra-thin 0.2mm Drone Motor Laminated Core Stator Factory in China – your reliable partner for high-performance motor cores. 📍 www.reenives-bldcmotor.com | WhatsApp: +86-13377741885 | Email: linda_reenives@163.com