Leading BLDC Motor Core Company in China
BLDC Motor Core – Precision Electromagnetic Cores for Drone & UAV Propulsion
BLDC motor efficiency lagging? Core loss causing overheating? Need a leading motor core partner in China? The BLDC motor core is the laminated magnetic circuit at the heart of every brushless DC motor—the component that generates the rotating magnetic field essential for propulsion. As a leading BLDC motor core company in China, Reenives delivers precision motor cores with 0.2mm ultra-thin silicon steel, 12N14P or 24N22P configurations, burr height < 0.03mm, and epoxy coating—reducing core loss by up to 30%, maximizing motor efficiency, and enabling reliable performance for drone, UAV, FPV, and eVTOL applications worldwide.
- • What Is a BLDC Motor Core?
- • Classification of BLDC Motor Cores
- • Technical Specifications & Verified Data
- • Applications: Drones, UAVs, FPV, eVTOL & More
- • 6-Step Engineering Selection Guide for BLDC Motor Cores
- • FAQ: BLDC Motor Core Technical Questions
- • Why Reenives – Leading BLDC Motor Core Company in China
- • Dongguan Runlu Motor Technology Co., Ltd.
What Is a BLDC Motor Core?
A BLDC motor core is the laminated magnetic circuit of a brushless DC motor, consisting of precision-stamped silicon steel sheets that are stacked and bonded to form the stator core. This core carries the copper windings that, when energized, create a rotating magnetic field that interacts with the rotor's permanent magnets to produce torque.
Why the BLDC motor core is critical for motor performance:
- Magnetic flux concentration – The core directs and concentrates magnetic flux for optimal torque and efficiency
- Core loss reduction – Thin laminations (0.15–0.20mm) minimize eddy current and hysteresis losses
- Heat dissipation – The core acts as a thermal path to transfer heat away from windings
- Structural support – Provides mechanical support for windings and maintains precise air gap geometry
ⓘ BLDC motor core insight: "A high-quality BLDC motor core is the single most critical component in a brushless motor. A 10% reduction in core loss can increase motor efficiency by 5–8%."
Reenives manufactures precision BLDC motor cores using imported 0.2mm silicon steel, progressive stamping dies, and automated epoxy powder coating—ensuring optimal magnetic performance for demanding UAV, FPV, and industrial applications.
Classification of BLDC Motor Cores
Reenives supplies BLDC motor cores across four primary series, tailored to different motor classes and performance requirements:
| Series | Stator OD (mm) | Slot/Pole Configuration | Lamination Thickness | Best For |
|---|---|---|---|---|
| Series A – Micro Motor | 12–20mm | 9N12P | 0.15mm | Micro drones, tiny whoops, sub-100g UAVs |
| Series B – FPV Racing | 22–30mm | 9N12P, 12N14P | 0.15–0.20mm | 3–5 inch FPV racing drones, freestyle |
| Series C – Mid-Size UAV | 30–50mm | 12N14P, 24N22P | 0.20mm | Logistics drones, agriculture, camera platforms |
| Series D – Heavy-Lift & Industrial | 50–80mm+ | 24N22P, 36N30P | 0.20mm | Heavy-lift UAVs, eVTOL, industrial motors |
BLDC motor cores are optimized for different motor sizes and power classes:
- 9N12P (9-slot, 12-pole): High RPM, responsive—ideal for FPV racing
- 12N14P: Near-perfect winding factor (0.933)—most popular for UAVs
- 24N22P: High torque, low cogging—heavy-lift and logistics
- 36N30P: Maximum torque density—eVTOL and industrial
Technical Specifications & Verified Data
All performance data below is derived from Reenives in-house laboratory testing (IEC 60404-2), third-party validation, and industry standards for BLDC motor cores.
| Parameter | Value / Range (Reenives Standard) | Test Standard / Source |
|---|---|---|
| Stator Outer Diameter | 12–80mm+ (customizable) | CMM / optical comparator |
| Lamination Material | 35PN210, 35PN250 (Nippon Steel / Baowu) | Material certificates |
| Lamination Thickness | 0.15mm / 0.20mm / 0.27mm / 0.35mm | Micrometer / IEC 60404-2 |
| Core Loss @ 1.0T, 400Hz (0.20mm) | ≤ 8.5 W/kg — 30% lower than 0.35mm | IEC 60404-2 / Reenives R&D |
| Saturation Flux Density Bs | 1.68 – 1.72 T | Epstein frame test |
| Burr Height (max) | < 0.03mm | Optical measurement |
| Epoxy Coating Thickness | 30–60 µm, dielectric > 2.5 kV | ASTM D149 |
| Stacking Factor | ≥ 97.5% | Weight method |
| Concentricity Tolerance | ±0.01mm – ±0.015mm | CMM measurement |
| Slot/Pole Configurations | 9N12P, 12N14P, 24N22P, 36N30P, custom | Reenives design standards |
| Typical Motor Efficiency | 90–95% (with optimized core) | IEEE Xplore / FEM simulation |
| Efficiency Improvement | 5–8% (vs. standard 0.35mm core) | Reenives R&D / field testing |
🔬 Data Source: Reenives R&D Report 2024-Q4 + IEC 60404-2 standard + Material certificates + IEEE Xplore motor studies.
Applications: Drones, UAVs, FPV, eVTOL & More
BLDC motor cores power the full spectrum of electric motor applications:
| Application | Typical Stator Size | Core Requirements | Performance Priorities |
|---|---|---|---|
| FPV Racing Drones | 22–30mm | Ultra-thin 0.15mm, high fill factor, low cogging | High RPM, rapid acceleration, responsiveness |
| Freestyle / Cinematic | 22–30mm | 0.20mm, smooth torque, thermal stability | Smooth control, consistent power, cooling |
| Logistics & Delivery | 30–50mm | 0.20mm, high efficiency, durability | Long flight time, payload capacity, reliability |
| Agriculture Spraying | 40–60mm | 0.20mm, corrosion-resistant coating | Heavy payload, dust/chemical resistance, power |
| eVTOL / Air Taxi | 50–80mm | 0.20mm, high power density, reliability | Safety, redundancy, high continuous power |
| Robotics & Industrial Motors | 20–80mm | 0.20–0.35mm, precision core | Precision control, reliability, thermal stability |
"A high-quality BLDC motor core is the foundation of every efficient brushless motor—from drone propulsion to industrial automation."
6-Step Engineering Selection Guide for BLDC Motor Cores
For procurement engineers and motor designers, selecting the optimal BLDC motor core requires systematic evaluation. Here is a practical 6-step framework:
- Define Motor Class & Application – Identify your motor type:
- Drone motors: High RPM, lightweight, efficiency-focused
- UAV motors: Long flight time, payload capacity, reliability
- Robotics: Precision control, smooth torque, reliability
- Industrial: Reliability, thermal stability, cost-effective
- Select Stator Outer Diameter – Match motor size to power class:
- 12–20mm: Micro motors, tiny whoops
- 22–30mm: FPV racing, freestyle (most popular)
- 30–50mm: Logistics, agriculture, camera platforms
- 50–80mm: Heavy-lift, eVTOL, industrial
- Choose Lamination Thickness – Thinner laminations reduce core loss at high frequencies:
- 0.15mm: Ultimate high-RPM performance, racing motors
- 0.20mm: Optimal balance—most applications
- 0.27–0.35mm: Industrial motors, cost-effective
ⓘ "0.20mm BLDC motor cores reduce core loss by approximately 30% compared to 0.35mm at 400Hz—critical for motor efficiency."
- Define Slot/Pole Configuration – Match to motor characteristics:
- 9N12P: High RPM, responsive—FPV racing
- 12N14P: Near-perfect winding factor—most popular for UAVs
- 24N22P: High torque, low cogging—heavy-lift
- 36N30P: Maximum torque density—eVTOL
- Specify Insulation & Coating – Critical for motor reliability:
- Epoxy powder coating (30–60µm, Class H 180°C)
- Corrosion resistance for outdoor and demanding applications
- Dielectric strength > 2.5 kV for reliable insulation
- Choose a Leading BLDC Motor Core Company – Evaluate core expertise:
- Experience with BLDC motor core designs (9N12P, 12N14P, 24N22P, etc.)
- Ultra-thin lamination capability (0.15–0.20mm)
- Precision stamping: burr < 0.03mm, concentricity ±0.01mm
- Epoxy coating capability for motor environments
- Material certificates and third-party test reports
- Proven track record with motor manufacturers
- Engineering support for motor optimization
FAQ: BLDC Motor Core Technical Questions
A BLDC motor core is the laminated magnetic circuit of a brushless DC motor, made from thin silicon steel sheets that are precision-stamped, stacked, and bonded. It is critical because: (1) it concentrates magnetic flux for optimal torque and efficiency, (2) thin laminations minimize eddy current and hysteresis losses, (3) it acts as a thermal path to dissipate heat from windings, and (4) it provides structural support for windings and maintains precise air gap geometry.
The optimal lamination thickness depends on the motor's operating frequency. For high-frequency motors (up to 40 kHz PWM), 0.15–0.20mm laminations are optimal. 0.20mm achieves core loss ≤ 8.5 W/kg at 400Hz—approximately 30% lower than conventional 0.35mm material—delivering longer flight times and cooler operation. For FPV racing motors operating at extreme RPM, 0.15mm laminations provide ultimate performance. 0.35mm is suitable for cost-sensitive industrial motors with lower operating frequencies.
Burr height is the raised edge left on stamped metal after the punching process. In BLDC motor cores, burr height must be maintained below 0.03mm because excessive burrs can: (1) damage enamel insulation on copper windings during assembly, causing short circuits, (2) create localized magnetic saturation points that reduce efficiency, (3) increase core loss through eddy current concentration, and (4) reduce motor reliability. Reenives maintains burr height < 0.03mm through precision progressive stamping dies.
The BLDC motor core (stator core) is the stationary component that generates the rotating magnetic field through its windings. The rotor is the rotating component that carries permanent magnets and follows the stator's magnetic field to produce torque. In a BLDC motor, the core is typically the outer component (in outrunner motors) or the inner component (in inrunner motors). Both work together to convert electrical energy into mechanical motion.
Epoxy powder coating provides three critical functions for BLDC motor cores: (1) electrical insulation between laminations to minimize eddy currents and prevent interlaminar shorts, (2) corrosion resistance for operation in humid, outdoor, or demanding environments, and (3) thermal durability up to 180°C (Class H) to withstand heat generated during motor operation. The coating thickness (30–60µm) is optimized for tight slot geometries with dielectric strength exceeding 2.5 kV.
Reenives supports a wide range of slot/pole configurations for BLDC motor cores including: 9N12P (most common for FPV and racing motors), 12N14P (near-perfect winding factor—most popular for UAVs), 24N22P (heavy-lift and logistics), 36N30P (eVTOL and extreme power), and custom configurations for specialized applications. Private mould development is available for high-volume OEM projects with exclusive design rights.
Yes. Reenives supports full customization of BLDC motor cores including: lamination thickness (0.15–0.50mm), material grade (35PN210, 35PN250, 50A470, etc.), outer diameter (12–80mm+), slot/pole configurations (9N12P, 12N14P, 24N22P, custom), stacking height, and epoxy coating specifications. Private mould development is available for high-volume OEM projects with exclusive design rights—from micro racing motors to large industrial motors.
Why Reenives – Leading BLDC Motor Core Company in China
Reenives has earned its reputation as a leading BLDC motor core company in China by combining advanced manufacturing technology with deep expertise in electrical steel, motor applications, and a global supply chain that delivers on time, every time.
Our Advantages — BLDC Motor Core Specialists
- ✅ Ultra-Thin Silicon Steel: 0.15–0.20mm laminations reduce core loss by up to 30%—extending motor efficiency and life
- ✅ Precision Progressive Stamping: Burr height < 0.03mm, concentricity ±0.01mm, stacking factor ≥ 97.5%
- ✅ Wide Range of Configurations: 9N12P, 12N14P, 24N22P, 36N30P, and custom designs
- ✅ Full Customization: Private mould development, tailored diameters, and custom stack heights
- ✅ Epoxy Coating: 30–60µm, Class H 180°C, dielectric > 2.5 kV
- ✅ Trusted Quality Control: IEC 60404-2 testing, third-party verification, and material certificates
- ✅ Motor Core Expertise: 4 years of experience with 1,000+ enterprise clients—specializing in motor propulsion
- ✅ Global Export Capability: Complete export qualifications with worldwide shipping to 40+ countries
- ✅ 100+ R&D Patents: Continuous innovation in BLDC motor core technology
🌏 Our leadership promise: Precision BLDC motor cores that maximize efficiency and reliability. Consistent quality that eliminates rework. Engineering support that optimizes your motor design. Global supply chain that delivers on time, every time. That's why Reenives is the leading BLDC motor core company in China.
⚡ Ready to optimize your BLDC motor performance with precision cores from a leading China company?
Contact Reenives today for engineering consultation, OEM samples, and competitive global pricing.
📱 WhatsApp: +86-13377741885
Dongguan Runlu Motor Technology Co., Ltd.
Reenives — Professional Drone Stator Core Manufacturer
Founded in 2022, Reenives has rapidly grown into a leading BLDC motor core company in China for the worldwide drone, UAV, robotics, and industrial motor markets.
Independent R&D Technology · Imported stamping & epoxy powder coating production lines · Dust-free workshops · 4 years of manufacturing experience · Solved BLDC motor core challenges for 1,000+ enterprises worldwide—including leading drone motor manufacturers.
From production to sales, we support bulk purchasing, private mould development, and sample making. We provide tailor-made solutions for your specific motor production scenarios—with competitive global pricing, consistent quality, and reliable on-time delivery.
🌐 www.reenives-bldcmotor.com | 📧 linda_reenives@163.com | 📱 +86-13377741885
✈️ Global motor manufacturers welcome — consult, visit the factory, or request free samples today!
Reenives — Leading BLDC Motor Core Company in China
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