UAV Motor Iron Core Company in China
Motor Iron Core – Precision Magnetic Cores for UAV & Drone Propulsion
UAV motor efficiency lagging? Iron core quality inconsistent? Need a trusted motor iron core partner in China? The motor iron core is the laminated magnetic circuit at the heart of every brushless motor—the component that directs magnetic flux, minimizes energy loss, and determines torque output. As a specialist UAV motor iron core company in China, Reenives delivers precision motor iron 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 thrust-to-weight ratio, and enabling reliable propulsion for FPV racing, UAV logistics, agriculture, and eVTOL applications worldwide.
- • What Is a Motor Iron Core?
- • Classification of Motor Iron Cores
- • Technical Specifications & Verified Data
- • Applications: Drones, UAVs, FPV, eVTOL & More
- • 6-Step Engineering Selection Guide for Motor Iron Cores
- • FAQ: Motor Iron Core Technical Questions
- • Why Reenives – UAV Motor Iron Core Company in China
- • Dongguan Runlu Motor Technology Co., Ltd.
What Is a Motor Iron Core?
A motor iron core is the laminated magnetic circuit of an electric motor, made from precision-stamped sheets of electrical steel (silicon steel) 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 motor iron core is critical for UAV 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
ⓘ Motor iron core insight: "The motor iron core is the single most critical component in a UAV motor. A 10% reduction in core loss can increase flight time by 8–12%."
Reenives manufactures precision motor iron 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 Motor Iron Cores
Reenives supplies motor iron cores across four primary series, tailored to different UAV classes and performance requirements:
| Series | Stator OD (mm) | Slot/Pole Configuration | Lamination Thickness | Best For |
|---|---|---|---|---|
| Series A – Micro FPV | 12–20mm | 9N12P | 0.15mm | Micro drones, tiny whoops, sub-100g FPV |
| 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 & eVTOL | 50–80mm+ | 24N22P, 36N30P | 0.20mm | Heavy-lift UAVs, eVTOL, cargo drones |
Motor iron cores are optimized for different UAV 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 motor iron 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 UAV Motor Efficiency | 90–95% (with optimized iron core) | IEEE Xplore / FEM simulation |
| Flight Time Improvement | 8–12% (vs. standard 0.35mm iron 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
Motor iron cores power the full spectrum of UAV applications:
| Application | Typical Stator Size | Iron 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 |
| Micro / Tiny Whoop | 12–20mm | 0.15mm, ultra-lightweight | Weight reduction, efficiency at low power |
"A high-quality motor iron core is the foundation of every efficient UAV motor—from FPV racing to heavy-lift cargo drones."
6-Step Engineering Selection Guide for Motor Iron Cores
For UAV motor designers and procurement engineers, selecting the optimal motor iron core requires systematic evaluation. Here is a practical 6-step framework:
- Define UAV Class & Application – Identify your drone type:
- FPV racing: High RPM, lightweight, efficiency-focused
- UAV logistics: Long flight time, payload capacity, reliability
- Agriculture: Heavy lift, dust/chemical resistance, durability
- eVTOL: Safety, redundancy, high continuous power
- Select Stator Outer Diameter – Match motor size to UAV class:
- 12–20mm: Micro drones, 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 UAV applications
- 0.27–0.35mm: Industrial motors, cost-effective
ⓘ "0.20mm motor iron cores reduce core loss by approximately 30% compared to 0.35mm at 400Hz—critical for UAV 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 UAV 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 Motor Iron Core Company – Evaluate core expertise:
- Experience with motor iron 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 UAV motor manufacturers
- Engineering support for UAV motor optimization
FAQ: Motor Iron Core Technical Questions
A motor iron core is the laminated magnetic circuit of an electric motor, made from thin silicon steel sheets that are precision-stamped, stacked, and bonded. It is critical for UAV motor performance 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—all of which directly impact motor efficiency, thrust, and flight time.
The optimal lamination thickness depends on the motor's operating frequency. For high-frequency UAV 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 motor iron 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—critical for UAV applications where motor failure means crashing. Reenives maintains burr height < 0.03mm through precision progressive stamping dies.
12N14P (12-slot stator, 14-pole rotor) is the most common configuration for UAV motor iron cores, offering a near-perfect winding factor of 0.933 and exceptionally low cogging torque. It is widely used across FPV racing, logistics, agriculture, and eVTOL applications. 9N12P is also popular for FPV racing, while 24N22P is preferred for heavy-lift and logistics UAVs.
Epoxy powder coating provides three critical functions for motor iron 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 uses high-grade non-oriented silicon steel (CRNGO) for motor iron cores including: 35PN210 (premium grade for UAV motors), 35PN250 (high-grade), and 50A470 (standard industrial grade). These materials offer magnetic saturation of 1.68–1.72 T and are sourced from Nippon Steel and Baowu with full material certificates. For high-frequency UAV motors, premium grades are recommended to minimize core loss.
Yes. Reenives supports full customization of motor iron 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 FPV motors to heavy-lift eVTOL propulsion systems.
Why Reenives – UAV Motor Iron Core Company in China
Reenives has earned its reputation as a specialist UAV motor iron core company in China by combining advanced manufacturing technology with deep expertise in electrical steel, motor applications, and a reliable global supply chain.
Our Advantages — Motor Iron Core Specialists
- ✅ Ultra-Thin Silicon Steel: 0.15–0.20mm laminations reduce core loss by up to 30%—extending UAV flight times by 8–12%
- ✅ 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
- ✅ UAV Motor Expertise: 4 years of experience with 1,000+ enterprise clients—specializing in UAV propulsion
- ✅ Global Export Capability: Complete export qualifications with worldwide shipping to UAV manufacturers
- ✅ 100+ R&D Patents: Continuous innovation in motor iron core technology
🔧 Our iron core promise: Precision motor iron cores that maximize UAV efficiency and reliability. Consistent quality that eliminates rework. Engineering support that optimizes your motor design. Global supply chain that delivers on time. That's why Reenives is the trusted UAV motor iron core company in China.
⚡ Ready to optimize your UAV motor performance with precision iron cores from China?
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 trusted UAV motor iron core company in China for the worldwide drone, UAV, FPV, and industrial motor markets.
Independent R&D Technology · Imported stamping & epoxy powder coating production lines · Dust-free workshops · 4 years of manufacturing experience · Solved motor iron core challenges for 1,000+ enterprises worldwide—including leading UAV motor manufacturers.
From production to sales, we support bulk purchasing, private mould development, and sample making. We provide tailor-made solutions for your specific UAV 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 UAV manufacturers welcome — consult, visit the factory, or request free samples today!
Reenives — UAV Motor Iron Core Company in China
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Leading BLDC Motor Core Company in China
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