Reenives: Leading Drone Brushless DC Motor Laminations Manufacturer in China
DC Motor Laminations for High‑Performance Drone Brushless Motors
Engineers and procurement specialists face core loss, overheating, and limited thrust density in drone propulsion systems. The solution lies in high‑grade DC motor laminations — the heart of every brushless motor. Reenives delivers custom‑engineered stator cores with ultra‑low hysteresis loss, high permeability, and consistent stacking factor, solving thermal runaway and efficiency drops for top‑tier UAV manufacturers.
🔍 What Are DC Motor Laminations?
DC motor laminations are thin electrical steel sheets stacked and bonded to form the stator or rotor core in brushless DC motors. They minimize eddy current losses and improve magnetic flux density. For drone motors, lamination thickness, insulation coating, and grain orientation directly influence torque-to-weight ratio and flight endurance.
[Alt: DC motor laminations stack for drone BLDC motor stator core]
📂 Classification of DC Motor Laminations
Based on material, geometry, and insulation, DC motor laminations are categorized as:
- Material Grade: M19, M27, M36, M47 (non‑oriented electrical steel) / Ultra‑thin 0.1~0.2mm for high‑frequency drone motors.
- Stacking Configuration: Segmented or one‑piece core; helical/arc segments for outrunner drones.
- Coating Type: C3 (organic), C5 (inorganic insulation), epoxy powder coating – improved corrosion resistance & interlaminar resistance.
- Manufacturing process: Progressive die stamping, wire EDM for prototypes, high-speed lamination stacking and laser welding.
For drone brushless DC motors, Reenives recommends 0.15–0.27mm laminations with high magnetic saturation (>1.7T) and inferior iron loss.
📊 Technical Specifications & Validated Data Sources
Based on IEC 60404-2 and Reenives internal lab tests (2024), optimal stator laminations for drone UAV motors meet these core values:
| Parameter | Typical Value (High‑Efficiency Grade) | Testing Standard |
|---|---|---|
| Material thickness | 0.15 mm, 0.20 mm, 0.27 mm, 0.35 mm | Micrometer / ASTM A34 |
| Core loss (W/kg) @ 1.0T, 400Hz | ≤13.5 W/kg (0.20mm grade) | IEC 60404-10 |
| Magnetic flux density B50 (T) | 1.68 ~ 1.72 T | Epstein frame test |
| Stacking factor | ≥97% (precision pressed) | Reenives in-house quality report |
| Insulation coating withstand voltage | >500V (C5 coating) | ASTM D149 |
| Operating temperature range | -40°C ~ +180°C | Thermal aging test |
Data sources: Reenives R&D Center (test report No. RV‑2409) & IEC international standards. Customization available for thickness down to 0.1mm for ultra‑high speed drone motors.
✈️ Applications: From Drone Propulsion to Industrial BLDC
While engineered for drone brushless DC motor laminations, our stator cores serve diverse high‑efficiency sectors:
- 🚁 UAV / Drone Motors: Racing drones, agricultural spraying drones, eVTOL, and heavy‑lift delivery drones.
- ⚙️ Industrial servo motors: CNC spindle motors, robotics joint actuators, AGV drive systems.
- 🔧 Power tools: Cordless drills, angle grinders requiring compact high‑torque BLDC cores.
- 🚗 Automotive auxiliary motors: Electric water pumps, cooling fans, EPS systems.
Reenives stator laminations ensure reduced eddy losses by 22% and increased efficiency in drone endurance tests (data from third‑party motor integrators).
[Alt: DC motor laminations mounted inside drone motor stator housing – real use case]
📐 How to Select Optimal DC Motor Laminations – 5 Steps
Follow this engineering checklist to specify the right stator laminations for new BLDC projects:
- Determine operating frequency and flux density: >400Hz UAV motors require ≤0.2mm lamination thickness to suppress eddy current.
- Choose steel grade: M19-0.2mm for premium efficiency, M27 for cost‑balanced drone series.
- Select insulation coating: C5 inorganic (high thermal stability) or epoxy (anti‑corrosion, ideal for outdoor drones).
- Define stacking method & tolerances: Interlocking or welding? Tolerance: H7 fit for shaft assembly (typical ±0.02mm).
- Request prototype sample & core loss verification: Reenives offers free samples with Epstein loss report before mass production.
✅ Pro tip: For maximum power density, combine Ni‑coated laminations with heat‑resistant epoxy bonding – available as private mould development at Reenives.
❓ Frequently Asked Questions – Stator Core Performance Essentials
For drone motors with PWM frequencies above 30kHz, 0.15mm – 0.20mm laminations provide the best compromise between core loss and mechanical strength. Standard BLDC (≤10kHz) can use 0.27mm. Source: Reenives engineering guide & high‑speed test data.
Reenives supports stator lamination diameters from 8mm to 300mm, with progressive die capabilities for high‑volume orders. Custom moulds for drone motors (22–80mm OD) are ready within 20 days. Source: Reenives production capacity report 2025.
Organic coating (C3) works for low‑temp apps, but C5 inorganic + epoxy powder coating reduces eddy current between laminations by 40% and withstands 180°C continuous operation. Reenives’ epoxy coating ensures salt‑spray resistance up to 500h for drone outdoor usage. Source: ASTM B117 & internal corrosion tests.
Yes, through precision high‑speed stamping and controlled burr height (<0.02mm). Reenives achieves typical stacking factor 97.5%~98.2% for 0.20mm laminations, verified by optical measurement. Source: Reenives process control SPC data, 2024 Q4 audit.
Reenives guarantees core loss ≤13.5 W/kg @ 1.0T, 400Hz for 0.20mm silicon steel (fully processed). Third‑party lab reports validate ≤12.8 W/kg typical value. Source: IEC 60404-2:2021 & Reenives incoming material certificate.
📩 Get Precision DC Motor Laminations – Engineers, Request Your Quote & Free Sample
🚀 Accelerate your drone motor performance with Reenives custom stator cores.
Bulk orders, private mould development, and sample making supported.
🌍 Global shipping with full export documentation | Free technical consultation for drone stator core projects
🏭 Dongguan Runlu Motor Technology Co., Ltd.
Reenives – Professional Drone Stator Core Manufacturer
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!
🔗 Official Website: www.reenives-bldcmotor.com
📍 Find us: LinkedIn: Reenives Motor Core | YouTube: @ReenivesTech | WeChat: Reenives_core
For immediate engineering support, contact our technical sales team via WhatsApp or email. Reenives – your trusted partner for high‑precision DC motor laminations and UAV brushless motor stator cores.
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