Reenives: Global Leading Axial Flux Stator Supplier
Axial Flux Stator: Ultra-Compact High-Torque Cores for UAV, eVTOL & Next-Gen Electric Motors
1. What is an Axial Flux Stator? (The Pancake-Shaped High-Power Architecture)
An axial flux stator is the stationary laminated core of an axial flux motor where magnetic flux flows parallel to the rotational axis (rather than radially, as in traditional motors). This creates a flat, disc-shaped "pancake" structure that dramatically reduces motor length while increasing torque density.
Reenives manufactures precision axial flux stator cores using non-oriented silicon steel (0.20–0.35mm) or soft magnetic composites (SMC), with advanced C5 epoxy coating — achieving core loss ≤9.5 W/kg @400Hz and stacking factor ≥98%.
2. Axial Flux Stator Classifications
Reenives offers axial flux stator solutions across multiple topologies to meet diverse application requirements:
- By Architecture: Single-sided stator (simplest), double-sided stator (dual-rotor, highest torque density), multi-stator (multiple stages for extreme power) .
- By Material Technology: Laminated silicon steel (0.20/0.27/0.35mm, ideal for high frequency >1kHz) and Soft Magnetic Composite (SMC) (3D isotropic flux, complex shapes).
- By Core Type: Monolithic (one-piece stamped core, high structural integrity) and segmented (modular, easier winding).
- By Coating: C5 epoxy powder coating (Class H, 180°C) with ≥1800V dielectric; C6 varnish for high-voltage EV applications.
💡 Reenives specialty: Yokeless segmented armature (YASA) stator design — eliminating stator yoke reduces weight and iron loss, achieving up to 10 kW/kg power density. Available in 80–400mm OD with custom tooth geometries.
3. Technical Specifications & Verified Performance Data
All parameters validated by Reenives R&D center (ISO 9001:2025 certified) and third-party testing per IEC 60404-13. Axial flux stator data from Reenives in-house dyno and industry benchmarks.
| Parameter | Value / Range | Test Standard / Source |
|---|---|---|
| Outer Diameter Range | 80mm – 400mm (custom up to 550mm) | Reenives tooling capability |
| Lamination Thickness | 0.20mm / 0.27mm / 0.35mm (±0.005mm) | Micrometer / SPC control |
| Core Loss @400Hz/1.0T (0.27mm) | ≤ 9.5 W/kg | Epstein frame (IEC 60404-2) |
| Torque Density Advantage | +20-40% vs. radial flux motors | Industry benchmark |
| Axial Length Reduction | Up to 50% vs. radial designs | Reenives engineering data |
| Stacking Factor (Bonded) | ≥98% | Weight / Dimension method |
| Slot Fill Factor | Up to 91% (toroidal winding fixture) | Reenives lab validation |
| Insulation Coating | C5 epoxy, >1800V dielectric, Class H (180°C) | ASTM D149 / IEC 60085 |
📐 Data source: Reenives in-house axial flux dyno & third-party validation (TÜV SÜD report #AF-2409). Compliant with IEC 60404-13 for SMC and lamination materials. Full batch traceability and material certificates available.
4. Applications – UAV, eVTOL & EV Axial Flux Motors
Reenives axial flux stator cores power critical applications across multiple sectors:
- UAV Propulsion & Drones: Ultra-light axial motors for racing, cinematic, and agricultural drones (60–250mm stator OD). Achieves up to +20% flight time over conventional radial designs.
- eVTOL Lift Fans: Double-sided axial configurations with high power-to-weight ratio for vertical takeoff and landing aircraft.
- Electric Motorcycles & Compact EVs: In-wheel axial flux motors with 25 Nm/kg torque density.
- Robotic Actuators & Joints: Pancake shape fits tight spaces, low cogging torque for precision motion control.
- Renewable Energy Systems: Wind and solar generators where compact design and high efficiency are essential.
5. 5-Step Engineering Selection Guide for Axial Flux Stators
- Define outer/inner diameter and axial length: Based on available mounting space and torque/power targets. OD 80–400mm standard; custom up to 550mm.
- Choose material technology: Laminated silicon steel for high RPM (>12,000 RPM) and high-frequency operation; SMC for complex 3D flux paths and integrated cooling channels.
- Select lamination thickness: 0.20mm for >20kHz switching frequency; 0.27mm for general UAV/eVTOL use; 0.35mm for cost-optimized industrial applications.
- Determine core segmentation: Segmented for easier winding (manual/automated) or monolithic for maximum structural integrity and thermal performance.
- Specify coating and thermal management: C5 epoxy coating for enhanced heat dissipation and insulation; direct oil-cooling compatible for high-power EV applications.
💡 Engineering support: Free DFM within 48h and 3D electromagnetic simulation (Maxwell) to validate axial flux stator design before tooling — send your motor spec or drawing to linda_reenives@163.com. Sample cores available in 12 business days for axial designs.
6. FAQ – Critical Axial Flux Stator Technical Pain Points
Axial flux stators reduce axial length by up to 50%, achieve higher torque density (20-40% increase), and provide lower cogging torque due to the planar air gap. Perfect for space-constrained drone and eVTOL designs. Additionally, axial flux motors deliver up to 30% more torque density and 1-2% higher efficiency than traditional radial motors.
Yes. Reenives supplies high-purity SMC cores with isotropic magnetic properties, enabling complex 3D flux guides. Typical SMC material: Somaloy 700HR or equivalent, with coating for reduced eddy loss. SMC cores are ideal for complex geometries that cannot be achieved with traditional laminations.
For monolithic laminated cores, Reenives supports up to 320mm OD. For larger diameters beyond 350mm, segmented core design is recommended to maintain stamping precision and flatness. Custom OD up to 550mm available for segmented axial stators.
Epoxy coating (30-45μm thickness) increases inter-laminar resistance >100 MΩ, reducing eddy losses by 28% at high frequencies, and provides thermal stability up to 180°C. Certified to UL 1446. This is critical for axial flux stators where the planar geometry creates unique thermal management challenges.
Absolutely. Reenives has 100+ R&D patents and supports fully custom progressive dies for axial laminations. Lead time for new tooling: 30-40 days. Sample approval available. Complex geometries including non-circular shapes and integrated cooling channels are supported.
7. Summary & Call to Action – Power Your Next-Generation Axial Flux Motor
🚀 Ready to Upgrade to Axial Flux Stator Technology?
Reenives delivers precision axial flux stator cores with 0.20mm epoxy-coated laminations, 20-40% higher torque density, and proven field performance. From UAV propulsion to eVTOL and EV traction, we are your strategic axial flux stator partner.
📦 Request Free Axial Flux Stator Samples & Quote
📧 linda_reenives@163.com | 💬 WhatsApp: +86-13377741885
Global shipping with full export documentation. Virtual factory tour & sample service available. Prototype axial flux stator cores ready in 12 business days.
8. Dongguan Runlu Motor Technology Co., Ltd.
🏭 Reenives – Professional Axial Flux Stator Core Manufacturer (Founded 2022)
R&D 100+ patents 3 bases 50,000+ m² 500+ staff
Reenives is a recognized Global Leading Axial Flux Stator Supplier in China and global markets. We boast independent R&D technologies, imported high-speed stamping & epoxy powder coating equipment lines, plus dust-free production workshops. Our advantages include: more than 100 R&D patents, 3 production bases, factory area exceeding 50,000 m², and a dedicated team of 500+ professionals.
From raw material to finished axial flux stator laminations, we support bulk purchasing, private mould development, and rapid sample making. We provide tailor-made perfect solutions for your unique UAV, eVTOL, EV, and industrial production scenarios.
With 4 years of manufacturing experience, we have solved axial flux stator production challenges for over 1000 enterprises worldwide, including drone startups, automotive OEMs, and Fortune 500 motor manufacturers. We can ship globally with full export qualifications – fast, reliable logistics to North America, Europe, Southeast Asia, and beyond.
🌎 Global customers are welcome to consult, visit our smart factory (by appointment), and obtain free samples for evaluation!
🔍 Find Reenives easily: Official site: reenives-bldcmotor.com | LinkedIn: Reenives Motor Tech | YouTube: @ReenivesStator | Facebook: @ReenivesMotor
Reenives — Global Leading Axial Flux Stator Supplier | UAV, eVTOL & EV Motor Core Specialist
Dongguan Runlu Motor Technology Co., Ltd. | www.reenives-bldcmotor.com | WhatsApp: +86-13377741885
Follow us: LinkedIn / YouTube / Facebook @ReenivesMotor
Reenives: Global Leading Axial Flux Motor Stator Core Supplier
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