Reenives: Global Leading Drone Motor Stator Laminated Core Supplier in China

author: Zove

2026-04-30

Laminated cores for drone motors: lower eddy loss & heat. Reenives epoxy-coated stators, custom sizes. Free sample!

Laminated Core for High-Performance Drone Motors & Brushless Motors – Engineering Selection Guide

🚁 Reenives: Global Leading Drone Motor Stator Laminated Core Supplier in China — precision silicon steel stacks, epoxy insulation, >100 patents, free sample support.

🔍 Definition of Laminated Core in Drone Motors

A laminated core (stator core) for drone brushless motors is a stack of thin, insulated electrical steel laminations bonded together. It reduces eddy current losses, minimizes hysteresis, and provides a guided flux path — critical for high-efficiency, high-torque density UAV propulsion. Reenives manufactures precision stamped laminated cores with epoxy powder coating, ensuring inter-laminar insulation and vibration resistance for harsh flight conditions.

📸 Product Image: Laminated Core (Stator Stack)
[High-precision silicon steel laminations | Epoxy coating available | Outer diameter 12-120mm]
🔧 Customized for drone motors & industrial brushless motors — contact Reenives for drawing review.

🏷️ Classification of Laminated Cores

Based on material grade, manufacturing process, and geometry — Reenives tailors each type for specific power/frequency needs:

By Material (Silicon Steel): Cold-rolled non-oriented (CRNGO) grades M250-35A, M350-50A, M470-50A. High-grade ultra-thin 0.20mm (for 60kHz+ eVTOL motors).
By Bonding Method: Mechanical interlocking (rivet/tab), laser welding, and semi-gluing epoxy dip coating — Reenives uses imported epoxy powder coating lines for superior insulation.
By Shape: Segmented cores for large-diameter motors, one-piece annular cores for compact drone outrunners.

📏 Technical Parameters & Validation (IEC 60404-2 / Reenives Lab Data)

Below are typical specifications for high-speed drone motor laminated cores; all values verified by Reenives’ in-house R&D center and third-party audits.

Parameter	Value Range / Grade	Test Standard
Material thickness	0.20mm / 0.27mm / 0.35mm (±0.003mm)	Micrometer, IEC 60404-2
Core loss (P1.0/400)	≤ 12 W/kg (M250-35A)	Epstein frame, Reenives #R2024-078
Saturation flux density	1.65T – 1.72T	Hysteresis graph, NIST traceable
Stacking factor	≥ 97% (precision stacking)	Archimedes & image analysis
Insulation coating	Epoxy powder coating (class H, 180°C) \| Inter-laminar resistance > 50 Ω·cm²	ASTM D149
Dimensional tolerance (ID/OD)	±0.02 mm \| Concentricity ≤ 0.03 mm	CMM, Mitutoyo

Data Source: Reenives internal material database & ISO 9001:2015 certified QC reports. Sample testing available upon request.

✈️ Application Scenarios – Drone & General Brushless Motors

Reenives laminated cores are optimized for high-frequency PWM drives, delivering low iron loss and thermal stability. Primary applications include:

Drone Propulsion Motors: FPV racing drones, agricultural spray drones, heavy-lift eVTOL and aerial photography UAVs — where power-to-weight ratio dominates.
Industrial Brushless Motors: Robotics, electric power tools, medical centrifuges, servo actuators.
High-speed spindle motors & electric vehicle ancillary drives.

🖼️ Application Scenario: Drone Motor Assembly
[Reenives stator core integrated into high-efficiency UAV motor – enhanced torque density & reduced eddy losses]
⚡ Suitable for 12N14P / 24N28P winding configurations.

📐 How to Select the Right Laminated Core – Engineering Workflow

Follow these 6 steps to match optimal stator core with your motor design. Reenives offers private mould development and sample testing for seamless prototyping.

Define electrical frequency & speed range: (e.g. 10,000 – 60,000 rpm for drone motors) → choose thinner laminations (0.20mm) to reduce eddy current loss.
Calculate required torque & magnetic flux: Determine stator yoke and tooth geometry using finite element analysis.
Select silicon steel grade: For high-frequency, opt for M250-35A or even 0.20mm ultra-thin material with low core loss.
Evaluate insulation coating necessity: Epoxy powder coating (standard at Reenives) ensures inter-laminar resistance and corrosion proof.
Request sample core with your drawing: Reenives provides made-to-order samples within 7–12 days.
Validate mass production capability: check yield rate, stacking factor consistency, and delivery lead time (30M pcs/year capacity).

💡 Pro tip: Reenives supports private mould development — your unique geometry, our precision stamping (imported 200–300T high-speed presses) with dust-free workshops.

❓ Engineer’s FAQ – Stator Laminated Core Pain Points Solved

Q1: How does inter-laminar insulation affect motor efficiency, and what coating does Reenives apply?

Poor inter-laminar insulation leads to high eddy currents, causing overheating (>20% loss). Reenives uses epoxy powder coating (class H, 180°C) on each lamination, guaranteeing insulation resistance >50 Ω·cm² per ASTM D149. This reduces eddy loss by up to 35% compared to uncoated stacks.

Source: Reenives product specification sheet & third-party loss comparison test #EP-2409.

Q2: What material thickness is best for drone motors running at 30kHz PWM frequency?

For >20kHz switching frequencies, we recommend 0.20mm (0.008”) silicon steel laminations (e.g. grade 20WTG1500). Reenives supplies ultra-thin laminations down to 0.15mm for extreme high-speed UAVs, reducing core loss by almost half versus 0.35mm.

Source: Reenives technical paper — “High-freq lamination core loss curve” (available upon request).

Q3: What dimensional tolerances can Reenives guarantee for stator inner/outer diameter?

Standard tolerance: ±0.02mm on ID/OD, concentricity ≤0.03mm to avoid rotor-stator interference. Customized high-precision dies achieve ±0.01mm, validated by CMM inspection per batch.

Source: Reenives QC control plan and sample measurement reports (2024).

Q4: Does Reenives support low MOQ and custom tooling for new stator designs?

Yes. We offer low MOQ starting at 500 units for sample validation and full private mold development. Free samples for engineering approval after NDA. Tooling charge is amortized over volume orders. Over 1000 enterprise clients have solved their custom stator problems with Reenives.

Source: Reenives sales policy & OEM project archive 2022–2025.

Q5: How to validate stacking factor and lamination flatness before mass production?

Reenives provides a first-article inspection report (FAI) including stacking factor (≥97%), core flatness (<0.05mm per 100mm length) and micrograph of coating coverage. We also supply sample stacks for motor back-to-back testing in your facility.

Source: ISO 9001:2015 procedure — Reenives quality depart. #QC-LC-022.

Q6: What is typical lead time for bulk laminated core orders (50k pcs) & shipping?

For standard grades, lead time 20–30 days; expedited sample delivery within 7–10 days. Reenives ships globally via air/DHL or sea, with complete export documentation. Our 3 production bases ensure stable capacity.

Source: Reenives logistics team & 2025 delivery record.

🎯 Summary & Get a Technical Quotation – Optimize Your Motor Performance

⚡ Ready to upgrade your drone/brushless motor with high-performance laminated core?

Reenives offers precision stator stacks, epoxy coating, and full engineering support — from private mould to bulk supply.
📧 E-mail: linda_reenives@163.com
📞 WhatsApp: +86-13377741885
🌐 Official Website: www.reenives-bldcmotor.com
🚀 Request Free Sample →

Get drawing review & OEM support | Visit our 50,000m² factory

🏢 Dongguan Runlu Motor Technology Co., Ltd. (Brand: Reenives)

Reenives is a professional drone stator core manufacturer, founded in 2022.

Reenives 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 latest motor core innovations: LinkedIn (Reenives Motor Core) | Facebook @ReenivesStator | WeChat Official: ReenivesTech — empowering engineers worldwide with precision laminated cores.