Electrical lamination refers to thin sheets of electrical steel (silicon steel) stacked, insulated, and bonded to form the magnetic circuit in BLDC motors, servo motors, and generators. Each lamination is coated with an insulating layer to minimize eddy current losses while maximizing magnetic flux concentration. For drone and UAV motors, lamination thickness directly determines efficiency at high frequencies (>500Hz) and thermal stability.

Based on grain orientation, thickness, coating, and manufacturing process, electrical lamination for BLDC motors falls into:

• Material Grade: Non-oriented silicon steel (M19, M27, M36, M47) / Ultra-thin 0.10mm, 0.15mm for high-frequency drone motors.
• Lamination shape: Segmented (ideal for outrunner drone motors) or one‑piece annular core.
• Insulation coating: C3 (organic varnish), C5 (inorganic ceramic), or epoxy powder coating – superior corrosion and interlamination resistance.
• Stacking method: Interlocking tabs, laser welding, or adhesive bonding (Reenives epoxy bonding for ultra‑low vibration).

For high‑end UAV propulsion, Reenives recommends 0.15–0.20mm non‑oriented electrical steel with C5 coating and stacking factor ≥97.5%.

Data derived from IEC 60404-2 and Reenives R&D center (2025 material qualification). Typical values for drone‑grade electrical laminations:

📌 Source: Reenives internal quality database & third‑party SGS verification (report GZ-2412-112). Custom grades available for high‑torque industrial BLDC.

While optimized for drone brushless DC motor electrical lamination, Reenives stator cores power diverse high‑efficiency systems:

• 🚁 UAV / eVTOL: Racing drones, agricultural sprayers, heavy‑lift delivery drones, and urban air mobility prototypes.
• ⚙️ Industrial servo & robotics: Collaborative robot joints, CNC spindle motors, AGV traction drives.
• 🔧 Power tools & garden equipment: Cordless blowers, chainsaws, electric screwdrivers.
• 🚗 Automotive BLDC: Electric oil pumps, cooling fan modules, electronic power steering.

Reenives electrical laminations demonstrate 15% reduction in iron loss compared to conventional grades, validated by motor integrators in drone endurance runs (third‑party report available).

To specify the right stator core for your BLDC motor project, follow this engineer‑validated workflow:

1. Determine operating frequency & switching speed: Frequencies >500Hz (drone motors) require ≤0.20mm lamination thickness; <300Hz (industrial) can use 0.27–0.35mm.
2. Select steel grade: M19‑0.20mm for premium drone efficiency; M27‑0.27mm for cost‑optimized industrial BLDC.
3. Choose coating insulation: C5 inorganic + epoxy for high temp & outdoor drone operation (salt spray resistance).
4. Define mechanical tolerances: ID/OD tolerance H7 (±0.02mm), burr height ≤0.02mm – critical for stacking factor.
5. Request samples & core loss verification: Reenives provides free samples with Epstein loss certificate before mass orders.

✅ Pro tip: Combine ultra‑thin electrical laminations (0.15mm) with high‑frequency PWM drives to reduce eddy losses by up to 35% – ideal for racing drone motors.