Reenives: Popular Drone Brushless Motor Stator Core Factory in China

author: Zove

2026-05-05

Brushless Motor Stator: Engineering Guide for Drone Propulsion

🔥 Reenives: Popular Drone Brushless Motor Stator Core Factory in China

⚠️ Low torque density, overheating, and short flight endurance? For drone motor engineers, the brushless motor stator is the electromagnetic heart of the propulsion system. Poor lamination quality or inadequate insulation leads to high core loss, reduced efficiency, and premature failure.

Reenives has become a popular drone brushless motor stator core factory in China, trusted by UAV and FPV brands worldwide. Our stators feature 0.20mm ultra-thin silicon steel laminations, epoxy powder coating (1800VAC), and burr-free stamping. This technical guide provides engineers and buyers with actionable insights into stator design, performance parameters, and supplier selection. Whether you manufacture agricultural drones, racing quads, or industrial BLDC motors, Reenives delivers precision stators with verified data and global shipping.

📑 Table of Contents

1. What Is a Brushless Motor Stator?
2. Classification of Stator Cores
3. Technical Parameters & Data Source
4. Applications: Drone & General BLDC
5. 6-Step Stator Selection Guide
6. FAQ – Stator Core Technical Pain Points
7. Get Free Sample & Custom Stator Quote
8. About Reenives – Dongguan Runlu Motor Technology

📌 What Is a Brushless Motor Stator?

High precision brushless motor stator core for drone - Reenives popular China factory

Fig 1: Precision brushless motor stator stack – 0.20mm laminations with epoxy coating. Manufactured by Reenives, a popular drone stator core factory in China.

A brushless motor stator is the stationary part of a BLDC motor, consisting of a laminated core with windings that generate a rotating magnetic field. For drone propulsion, stator quality determines torque, efficiency, and thermal behavior. Reenives manufactures stators using progressive stamping dies (imported from Japan/Germany) and epoxy powder coating (thermal class H, 180°C). Each lamination is precision-blanked with burr height ≤0.012mm and stacking factor ≥96.8%, ensuring consistent magnetic flux and minimal eddy current loss. Our stators are compatible with drone motors from 12mm to 220mm outer diameter.

🏗️ Classification of Brushless Motor Stator Cores

Based on construction and application, Reenives offers three main stator types:

Segmented stators – Individual teeth stamped and assembled; ideal for high-pole-count drone motors (12N14P, 24N28P) to simplify winding and increase copper fill factor.
Integrated ring stators – One-piece continuous laminations for maximum mechanical rigidity; used in heavy-lift UAVs, eVTOL, and industrial servos.
Custom geometry stators – Skewed slots, trapezoidal teeth, non-standard diameters, or reduced back-iron. Reenives supports private mould development for any custom stator design.

Our stator cores are available in 0.20mm (ultra-low loss for FPV), 0.27mm (balanced), and 0.35mm (cost-effective for low-frequency apps). Outer diameters from 12mm to 220mm, stack heights up to 100mm.

📊 Technical Parameters – Brushless Motor Stator

All values verified per IEC 60404-2 and ASTM A34, tested by Reenives in-house lab and SGS (2025). Material: 20WTG1300 (0.20mm), 27WGP1400, 35W270.

Parameter	Specification (Drone-Optimized)	Test Standard / Source
Lamination thickness	0.20mm / 0.27mm / 0.35mm ±0.005mm	Micrometer / ASTM A34
Iron loss @ 400Hz, 1.0T	≤11.2 W/kg (0.20mm grade)	Epstein frame / IEC 60404-2
Iron loss @ 1000Hz, 0.8T	≤31.0 W/kg (0.20mm)	Reenives high-frequency test
Stacking factor	≥96.8% (typical 97.2%)	Weight / volume method
Insulation coating	Epoxy powder coating, withstand 1800VAC	Dielectric test / IEC 60404-11
Thermal class	Class H (180°C continuous)	IEC 60085
Burr height (max)	≤0.012mm	Vision measurement / JIS C 2550
Outer diameter range	12mm – 220mm (custom molds available)	Reenives engineering catalog

📌 Source: Reenives internal report #RV-2506 & SGS certificate. Full material COA available per batch.

✈️ Applications – Drone, UAV, FPV & General BLDC

Reenives brushless motor stators are deployed across high-demand sectors:

FPV racing drones – ultra-high RPM (60k+), instant throttle response, minimal eddy loss.
Agricultural & delivery UAVs – extended endurance, lower temperature rise, high reliability.
eVTOL and advanced air mobility – lightweight, high torque density stators.
Industrial BLDC servos, robotics, e-scooters, power tools – universal compatibility.

Drone motor assembly with Reenives brushless motor stator core

Fig 2: Stator core integrated into a UAV propulsion motor – high stacking factor and low iron loss ensure reliable flight performance.

🔧 6-Step Stator Selection Guide for Drone Motors

Define operating frequency & motor RPM: For drone motors with PWM >30kHz, choose 0.20mm ultra-thin laminations. For lower frequency applications, 0.27mm or 0.35mm may suffice.
Calculate required torque density: Use motor simulation (Maxwell, Motor-CAD). Reenives provides B-H curves and loss maps for accurate design.
Select stator geometry: Outer diameter, slot number, tooth width, and stack height based on your mechanical envelope and winding scheme.
Specify insulation coating: Epoxy powder coating is mandatory for drone environments (humidity, dust, thermal cycling). Request dielectric test reports.
Verify stamping precision & stacking factor: Ensure burr height ≤0.02mm and stacking factor ≥96% (Reenives ≤0.012mm, ≥96.8%).
Order prototypes and validate: Request free samples from Reenives for dynamometer testing – compare iron loss, temperature rise, and efficiency against your baseline.

✅ Reenives provides free samples for qualified OEMs, along with custom mould development (10-15 day prototyping, 25-30 day production tooling). Global shipping with full export documentation.

❓ FAQ – Brushless Motor Stator Technical Pain Points

Q1: What lamination thickness is best for high-speed drone stators (60,000+ RPM)?

For extreme RPM and PWM frequencies >40kHz, 0.20mm ultra-thin silicon steel is essential. Reenives’ 0.20mm grade achieves iron loss ≤11.2 W/kg @400Hz, 1.0T, reducing eddy loss by ~30% compared to 0.35mm. This directly improves flight time and reduces motor temperature.

Source: Reenives material datasheet & high-frequency loss comparison per IEC 60404-2

Q2: Which insulation coating do popular stator factories apply to prevent interlaminar shorts?

Leading factories like Reenives use epoxy powder coating (15-25μm per side). It provides 1800VAC dielectric strength, thermal class H (180°C), and excellent resistance to humidity, dust, and salt spray – verified by 95% RH / 1000h testing without insulation degradation.

Source: Reenives coating line specification & accelerated aging test report (2025)

Q3: What stacking factor should I expect from a quality brushless motor stator?

High-quality stators achieve a stacking factor ≥96.8% (Reenives typical 97.2%). Stacking factor below 95% indicates poor interlock or excessive coating thickness, leading to reduced magnetic flux and larger motor size for the same torque.

Source: Reenives QA lot report (average of 500 samples, 2025 Q2)

Q4: Can you produce custom stator geometries (skewed slots, non-standard diameters)?

Absolutely. Reenives specializes in private mould development for any custom stator design – skewed slots, asymmetric tooth profiles, non-standard IDs/ODs, or reduced back-iron for lightweight drones. With over 100 R&D patents, we deliver prototype stators in 10-15 days and production tooling in 25-30 days, with full IP protection.

Source: Reenives custom engineering & patent portfolio (CN, US pending)

Q5: How do I verify iron loss consistency across large stator batch production?

Trustworthy suppliers provide a Certificate of Analysis (COA) per batch, including Epstein frame test results for iron loss, stacking factor, and insulation resistance. Reenives performs random sample testing per lot using a Brockhaus MPG tester and can share raw data upon request.

Source: Reenives quality management system ISO 9001:2024, annual SGS audit

Q6: Does Reenives offer free samples and global shipping for brushless motor stators?

Yes. Reenives provides free samples for qualified R&D projects (shipping cost may apply for low volumes). We ship worldwide via DHL, FedEx (5-7 business days) or sea freight (25-35 days), handling all export documentation including China-origin certificates, commercial invoice, and customs clearance support.

Source: Reenives sales policy & global shipment records (USA, Europe, Brazil, Australia, Japan)

🎯 Summary + Request Free Sample & Custom Stator Quote

🔥 Reenives – Popular Drone Brushless Motor Stator Core Factory in China

✔️ 0.20mm ultra-low loss stamping ✔️ Epoxy insulation class H ✔️ Stacking factor >96.8% ✔️ Burr-free ≤0.012mm ✔️ 100+ patents ✔️ Global shipping

📩 Request Free Sample & Quote →

🌐 Official website: www.reenives-bldcmotor.com
📞 WhatsApp: +86-13377741885
✉️ Email: linda_reenives@163.com

Free technical consultation, 3D drawing review, and sample support for volume buyers. Virtual factory tour available.

🏭 Dongguan Runlu Motor Technology Co., Ltd.

⚡ Reenives – Professional Drone Stator Core Manufacturer Since 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 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!

🔗 Follow Reenives for stator innovations: LinkedIn (Reenives Motor Tech), YouTube (@ReenivesStator), Facebook (Reenives BLDC), Twitter (@Reenives_BLDC).