Reenives: Leading Drone Propulsion System Brushless Stator Laminations Supplier in China

author: Zove

2026-04-21

High-efficiency brushless stator laminations for drones & BLDC motors. Low loss, custom stacks. Reenives.

Brushless Stator Laminations for Drone Propulsion | Reenives: Leading Drone Propulsion System Brushless Stator Laminations Supplier in China

⚠️ Overheating, poor efficiency, inconsistent torque? Many drone propulsion engineers struggle with substandard brushless stator laminations that cause excessive iron losses and short flight times. Reenives delivers precision-engineered brushless stator cores with ultra-low core loss (≤8.5 W/kg @30kHz), advanced epoxy coating, and tight dimensional tolerances. Whether for heavy-lift UAVs, eVTOL, or industrial BLDC motors, our laminations boost system reliability by over 30%. 🚁

📑 Technical Contents

1. Brushless Stator Definition
2. Classification by Design & Application
3. Technical Parameters + Data Source
4. Key Applications (Drone Propulsion & More)
5. Engineering Selection Workflow
6. FAQ – Stator Lamination Deep Dive
7. Custom Solutions & Contact
8. Dongguan Runlu Motor Technology Co., Ltd.

⚙️ Brushless Stator: Core of Drone Propulsion Systems

A brushless stator (stator core) is the stationary laminated assembly in a brushless DC motor. It consists of stacked silicon steel sheets, precision bonded or welded, with slots for copper windings. The stator lamination directly determines electromagnetic efficiency, thermal dissipation, and power density. For drone propulsion systems, low eddy current loss and high magnetic permeability are non-negotiable. Reenives specializes in brushless stator laminations with optimized geometry for high-RPM UAV motors.

Reenives brushless stator lamination stack for drone propulsion motor

Figure 1: High-density brushless stator core with epoxy insulation – ready for winding.

📌 Classification of Brushless Stator Laminations

Based on motor topology and drone requirements, Reenives supplies several stator lamination categories:

🔹 Outer Rotor Stator Laminations: Standard for multi-rotor drones (22xx, 28xx series) – large torque output, compact radial dimension.
🔹 Inner Rotor Stator Laminations: For high-speed racing drones & fixed-wing UAVs – low moment of inertia, high RPM capability.
🔹 Segmented Stator Cores: Modular lamination segments for concentrated windings – higher slot fill factor and better heat dissipation.
🔹 Ultra-thin (0.15mm) High-Frequency Laminations: Targeting >30kHz PWM frequency, ideal for high-power-density eVTOL motors.

📊 Technical Parameters & Verified Data (Reenives Engineering)

All data below derived from Reenives internal QA lab & third-party testing (IEC 60404-2, ASTM A912). These parameters apply to standard brushless stator laminations for drone propulsion and industrial BLDC motors.

Stator Series (OD/ID mm)	Stack Height (mm)	Steel Grade	Lam. Thick.	Core Loss @30kHz (W/kg)	Coating Class	Stacking Factor
22xx (22x18)	5-10 custom	35PN210	0.20mm	≤12.3	H (180°C)	≥96.8%
23xx (23x18.5)	6-12	27PH150	0.20mm	≤10.2	H (180°C)	≥96.9%
28xx (28x22)	8-15	35PN210	0.20mm	≤11.8	H+ (200°C opt.)	≥96.5%
31xx (31x26)	10-20	50PN470	0.35mm	≤18.0	F (155°C)	≥97.2%
High-efficiency custom	8-35	0.15mm grade	0.15mm	≤7.5	H (200°C)	≥97.5%

🔬 DATA SOURCE Reenives production & metrology reports 2025, ISO 9001:2015 certified. Tolerances: ID/OD ±0.02mm, stack height ±0.03mm, flatness ≤0.03mm. 100% Hi-pot tested.

✈️ Core Applications – Drone Propulsion & Beyond

Our brushless stator laminations power mission-critical motors in:

Drone Propulsion Systems: Agricultural spraying drones, delivery UAVs, FPV racing, heavy-lift cargo drones.
eVTOL (Urban Air Mobility): High-torque density stators for lift+cruise configurations.
Industrial BLDC Servo Drives: Robotics arms, automated guided vehicles, medical pumps.
Electric Powertrain: Light EVs, e-scooters, and high-speed spindle motors.

Brushless stator assembly for drone propulsion motor at Reenives factory

Application scene: Precision stator lamination stacking for UAV motor production.

⚙️ 5-Step Engineering Selection for Brushless Stator Laminations

Define motor dimensions & slot/pole combination: e.g., 12N14P, 24N28P – critical for stator geometry.
Calculate electrical loading & required torque density: Provide target kV, power, and max RPM to our engineers.
Select lamination material & thickness: For high-frequency (>30kHz) use 0.15mm grade; for cost-sensitive industrial use 0.35mm.
Specify insulation coating: Reenives offers epoxy powder coating (40-80µm, 1800V dielectric, thermal class H). Edge coverage ≥98% prevents shorts.
Request prototype samples & validation: We provide up to 5 free sample sets, with full magnetic test report (B-H curve, iron loss data).

💡 Engineering tip: Reenives supports custom notching patterns, stepped skewing for cogging torque reduction, and private mould development. Provide your motor specs for a free feasibility study.

❓ FAQ – Brushless Stator Lamination Technical Deep Dive

🔹 What is the maximum operating temperature for epoxy-coated brushless stator laminations?

Standard epoxy coating is rated class H (180°C continuous). For high-power drone propulsion, Reenives offers optional PI-based coating with thermal class up to 200°C. Dielectric strength remains ≥1800VAC across all options. Source: Reenives coating technical datasheet (2025).

🔹 How does lamination thickness affect motor efficiency for UAVs?

Thinner laminations (0.15mm vs 0.20mm) reduce eddy current losses by approximately 25-30% at 30-50kHz switching frequencies. For racing drones and eVTOL, 0.15mm offers up to 4% system efficiency gain. However, 0.20mm provides higher mechanical rigidity for heavy-lift industrial drones. Both options are available. Source: Reenives motor design simulation & validation.

🔹 What stacking factor can be guaranteed for custom stator stacks?

Reenives achieves stacking factor ≥96.8% for 0.20mm laminations and ≥97.5% for 0.15mm materials using high-precision interlocking or laser welding. This minimizes air gaps and ensures consistent magnetic performance. Source: Reenives QA test report, ASTM A912 method.

🔹 What are the standard slot insulation options for brushless stators?

Apart from full epoxy powder coating, Reenives provides slot liner insulation (Nomex® or polyimide film) and trickle resin impregnation. The standard coating covers both inner bore and outer surface, eliminating inter-lamination shorts. Source: Reenives stator insulation specification V3.1.

🔹 Can I get a custom stator lamination with skewed slots?

Yes, Reenives supports step-skewed or progressive skewed laminations to reduce cogging torque and torque ripple – crucial for smooth drone flight control. Minimum order for custom skewing is 500 pcs, with free sample evaluation available. Source: Reenives R&D engineering guidelines.

📢 Request Your Custom Brushless Stator – Engineer Support & Free Sample

⚡ Power your drone propulsion with Reenives – China’s leading stator lamination specialist.

✔️ Private mould & tailor-made designs
✔️ Free technical consultation + prototype samples
✔️ Global shipping with full export documentation

🌐 Visit Official Website

📞 WhatsApp: +86-13377741885
📧 Email: linda_reenives@163.com

🏭 Dongguan Runlu Motor Technology Co., Ltd.

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 develop , 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 domain: www.reenives-bldcmotor.com | Precision brushless stator laminations for global drone & BLDC motor manufacturers.

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