Electrical Steel Lamination refers to thin sheets of silicon steel stacked and bonded to form a motor’s stator core. For UAV drone propulsion systems, laminations drastically reduce eddy current losses (by 95% compared to solid cores) and hysteresis loss, enabling higher power density and cooler operation. Typical thickness ranges from 0.15 mm to 0.35 mm, with insulating coatings (C3, C5) to enhance interlaminar resistance.

Reenives uses high-grade fully processed electrical steel (M400-50A, 35PN210, 20PN120 equivalent) imported from leading mills, ensuring consistent magnetic performance across high-frequency switching (10kHz–50kHz).

Based on grain orientation, thickness, and insulation grade, laminations are tailored for specific RPM and torque demands:

• Non-Oriented (NO) Silicon Steel: Ideal for UAV motors (high frequency, isotropic magnetic properties). Grades: 20PN120, 35PN210, 50PN290.
• Ultra-Thin Laminations (0.15mm – 0.20mm): For extreme high-speed drone motors (>50,000 rpm) – minimizes excess eddy loss.
• Insulation Coatings: C3 (organic), C5 (inorganic + semi-organic) – high temperature resistance up to 220°C.
• Stacking Methods: Interlocking (riveting), laser welding, or epoxy bonding – Reenives offers adhesive-bonded stacks for silent operation and zero magnetic distortion.

All parameters meet or exceed IEC 60404-2 and ASTM A677/A683 standards. The following table lists typical values for Reenives’ drone-grade stator cores (tested at 400Hz, 1.0T):

Data Source: Reenives in-house laboratory (accredited to ISO/IEC 17025) & third-party verification by SGS (report #R24-0312). Consistent performance across batch production with ±0.01mm dimensional tolerance.

For drone propulsion, lower iron loss directly translates to longer flight time (+12-18%) and reduced thermal stress on magnets.

While optimized for UAV thrust systems, Reenives’ electrical steel laminations serve any high-efficiency brushless motor application:

• Drone Propulsion Systems (FPV racing, heavy-lift industrial drones, eVTOL prototypes)
• Robotic servo motors & actuators (high torque density)
• Electric vehicle auxiliary motors (cooling fans, pumps)
• Power tools & high-speed spindles

Case study: A leading UAV manufacturer replaced standard 0.35mm laminations with Reenives’ 0.20mm grade and observed 9.4% efficiency gain at 75% throttle, plus 22°C lower operating temperature after 30 min hover test.

To achieve optimum power-to-weight ratio for your UAV motor, follow these steps:

1. Define operating frequency & RPM: Above 20kHz? Choose ≤0.20mm thickness to suppress eddy currents.
2. Calculate core loss budget: Use Steinmetz equation; request simulation support from Reenives.
3. Select stacking factor & bonding method: For drone motors, epoxy-bonded stacks achieve stacking factor >97%.
4. Insulation compatibility: For high altitude drones (low pressure), C5 inorganic coating prevents partial discharge.
5. Tooling / custom die development: Reenives supports private moulds (100+ proprietary dies) – minimize air gap and optimize slot fill.

Need a tailored simulation? Contact our engineering team for lamination stack design based on your motor magnetic circuit.

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!

✅ Trusted by leading UAV & industrial motor brands – schedule a factory tour or video call to witness our advanced production lines.