Drone Motor Electrical Steel Laminations Supplier
Electrical Steel Laminations — Drone Motor Laminations for UAV & BLDC Motors | Reenives Stator Core Supplier
⚠️ Are your electrical steel laminations causing high core loss, excess heat, or poor stacking? Wrong steel grade, inconsistent thickness, burrs, or weak insulation coating can reduce motor efficiency and lead to premature failure — especially in high-RPM drone motors.
✅ Reenives produces electrical steel laminations engineered for drone brushless motors. With imported high-speed stamping lines, epoxy powder coating, and dust-free workshops, we deliver laminations with low core loss, tight tolerances, and clean edges. As a drone motor electrical steel laminations supplier, we help 1000+ enterprises improve motor reliability.
📋 Table of Contents
What Are Electrical Steel Laminations?
Electrical steel laminations are thin sheets of silicon steel (also called electrical steel) stamped or cut into specific shapes and stacked to form the magnetic core of a motor — either the stator, the rotor, or both. Silicon content and grain orientation are engineered to maximize magnetic permeability and minimize core loss.
In drone motors, electrical steel laminations are the foundation of the electromagnetic circuit. Their material grade, thickness, stamping quality, and coating directly determine:
- Core loss & motor efficiency
- Heat generation & thermal performance
- Stacking factor & magnetic flux density
- Mechanical strength & vibration resistance
Common electrical steel grades used in drone motors include 35WW250, 50WW470, and other low-loss silicon steels. Thinner laminations (0.20 mm – 0.35 mm) are preferred for high-frequency operation.
Precision electrical steel laminations — manufactured by Reenives with imported high-speed stamping & epoxy powder coating lines.
Types of Electrical Steel Laminations
Electrical steel laminations come in different material grades and designs, each suited to specific motor requirements. Reenives manufactures the following types:
- Non-Oriented Electrical Steel (NOES) — Most common for motor stators and rotors. Uniform magnetic properties in all directions. Grades include 35WW250, 50WW470, 50WW600.
- Grain-Oriented Electrical Steel (GOES) — Higher permeability in the rolling direction. Used in transformers and some specialized motors.
- High-Frequency Electrical Steel — Ultra-thin laminations (0.20 mm or less) for high-RPM drone motors to minimize eddy current losses.
- Stator Laminations — Slotted ring-shaped laminations that hold the windings and form the stationary magnetic circuit.
- Rotor Laminations — Laminations for the rotating part, often with permanent magnet slots or squirrel-cage features.
- Segmented Laminations — Individual teeth stamped separately for separate winding, then assembled into a full core. Higher slot fill factor.
- Epoxy-Coated Laminations — Individually coated with epoxy powder for superior insulation, corrosion resistance, and wire adhesion.
- Custom Laminations — Private mould development for unique slot counts, outer diameters, and tooth profiles.
Whether you need standard 0.50 mm NOES laminations or ultra-thin 0.20 mm high-frequency laminations, Reenives can supply the right solution.
Key Specifications & Data
Below are typical specifications for Reenives electrical steel laminations. Custom values are available upon request.
| Parameter | Typical Range / Value | Notes |
|---|---|---|
| Steel Type | Non-oriented silicon steel (NOES) | Uniform magnetic properties |
| Common Grades | 35WW250, 50WW470, 50WW600 | Low core loss |
| Lamination Thickness | 0.20 mm – 0.50 mm | Thinner = lower eddy current loss |
| Silicon Content | 2.5% – 3.5% | Higher Si = higher resistivity |
| Outer Diameter | 20 mm – 200 mm | Customizable |
| Inner Diameter | 10 mm – 180 mm | Depends on rotor design |
| Stack Length | 5 mm – 80 mm | Affects torque & power |
| Slot Number | 6, 9, 12, 18, 24, etc. | Matches pole count |
| Insulation Coating | Epoxy powder coating | Uniform, pinhole-free |
| Core Loss (at 400Hz, 1T) | ≤ 25 W/kg | Material dependent |
| Tolerance | ±0.05 mm (critical dimensions) | High-precision stamping |
| Burr Height | ≤ 0.03 mm | Clean edges for stacking |
Data source: Reenives internal testing & supplier material datasheets, 2024. Actual values may vary by design.
Applications of Electrical Steel Laminations
Reenives electrical steel laminations are used across a wide range of drone and brushless motor applications:
- FPV Racing Drones — High RPM, lightweight laminations with low cogging torque.
- Cinematic & Photography Drones — Smooth, vibration-free laminations for stable aerial footage.
- Agricultural Spraying Drones — Corrosion-resistant epoxy-coated laminations for harsh chemical environments.
- Industrial Inspection Drones — High-torque laminations for long endurance and heavy payloads.
- eVTOL & UAV Propulsion — Custom high-power laminations for next-generation air mobility.
- General BLDC Motors — Fans, pumps, robotics, power tools, and automotive actuators.
Reenives electrical steel laminations power FPV, agricultural, cinematic, and industrial UAVs worldwide.
How to Select the Right Electrical Steel Laminations
Choosing the correct electrical steel laminations for your drone motor involves several engineering decisions. Follow these steps:
- Determine Required Torque & RPM — Higher torque needs more stack length or larger diameter. High RPM demands thinner laminations and low-loss material.
- Select Steel Grade — Lower-loss grades (e.g., 35WW250) reduce heat but cost more. Higher grades (e.g., 50WW600) are more economical but have higher loss.
- Choose Lamination Thickness — For high-frequency operation (e.g., 400Hz+), use 0.20 mm laminations to reduce eddy current losses. For lower frequencies, 0.35–0.50 mm is suitable.
- Select Slot/Pole Combination — Common drone motors use 12S/14P or 9S/6P. This affects cogging torque, winding factor, and efficiency.
- Decide on Stator vs. Rotor Laminations — Stator laminations hold windings; rotor laminations hold magnets or cage bars. Each has distinct design requirements.
- Consider Insulation & Coating — Epoxy powder coating is recommended for moisture, vibration, and chemical resistance.
- Verify Tolerances & Burr Height — Tight tolerances and minimal burrs ensure proper stacking and reduce vibration.
- Request Samples & Test — Reenives provides free samples for qualified projects. Test core loss, temperature rise, and mechanical fit.
FAQ — Electrical Steel Lamination Parameters
Q1: What electrical steel grade do you recommend for drone motors?
A: For most drone motors, we recommend non-oriented electrical steel (NOES) grades such as 35WW250 or 50WW470. These grades offer low core loss and uniform magnetic properties. For high-RPM motors above 10,000 RPM, a thinner 0.20 mm or 0.25 mm lamination in a low-loss grade (e.g., 35WW250) is preferred to minimize eddy current losses. For lower-cost, lower-RPM applications, 50WW600 may be suitable.
Source: Reenives engineering team, based on motor design guidelines and material datasheets.
Q2: What lamination thickness do you recommend for high-RPM drone motors?
A: For high-RPM drone motors (above 10,000 RPM), we recommend 0.20 mm or 0.25 mm silicon steel laminations. Thinner laminations significantly reduce eddy current losses, which helps keep the motor cool and improves efficiency. For lower RPM applications, 0.35 mm or 0.50 mm can be more cost-effective.
Source: Reenives engineering team, based on motor design guidelines and material datasheets.
Q3: What is the typical core loss of your electrical steel laminations?
A: Our standard electrical steel laminations using 35WW250 silicon steel typically exhibit core loss ≤ 25 W/kg at 400Hz and 1 Tesla. With premium low-loss materials, we can achieve even lower values. Actual core loss depends on lamination thickness, material grade, and operating frequency.
Source: Reenives internal testing data, 2024.
Q4: Do you offer epoxy powder coating for electrical steel laminations?
A: Yes. We use imported epoxy powder coating equipment to apply a uniform, pinhole-free insulation layer on individual laminations. This coating improves corrosion resistance, enhances wire adhesion, and protects against moisture — critical for agricultural and marine drones.
Source: Reenives production specification.
Q5: Can you develop custom electrical steel laminations for my specific drone motor?
A: Absolutely. We support private mould development. Provide us with your required outer diameter, inner diameter, stack length, slot number, tooth profile, and steel grade. Our R&D team will design and produce custom laminations tailored to your motor. Tooling lead time is typically 15–25 days.
Source: Reenives custom development process.
Q6: What is the minimum order quantity (MOQ) for electrical steel laminations?
A: For standard designs, our MOQ is flexible — we support bulk purchasing as well as sample orders. For custom private mould projects, MOQ depends on the tooling and design complexity. Please contact us with your requirements for a precise quote.
Source: Reenives sales policy.
Summary — Get Your Electrical Steel Laminations Quote Today
Ready to Improve Your Drone Motor Performance with Precision Laminations?
Reenives is a drone motor electrical steel laminations supplier with 4 years of manufacturing experience, 100+ R&D patents, and 3 production bases. We serve 1000+ enterprises worldwide with high-precision electrical steel laminations for UAV and BLDC motors.
📦 Bulk purchasing · 🔧 Private mould development · 🧪 Free samples
🌐 Official Website: www.reenives-bldcmotor.com
📧 Email: linda_reenives@163.com
Contact us now for a free sample and tailored solution for your production scenario.
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!
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