1. What Defines a Large BLDC Motor Stator Core?

In a Large BLDC Motor, the stator core must handle significantly higher magnetic flux and mechanical stress. Typically exceeding 200mm outer diameter, these cores use multi-stack lamination blocks to minimize eddy currents while providing structural rigidity. Reenives engineers large stators with 0.27mm & 0.35mm non-oriented silicon steel, epoxy powder coating, and advanced interlocking for high torque density in heavy-lift drones and industrial automation.

Customizable slot/tooth geometry for 24N22P, 36N42P large BLDC architectures

2. Classification: Material, Stacking & Coating Types

3. Technical Specifications (IEC / Reenives Lab Data)

• Outer diameter range: 120mm – 520mm (custom beyond)
• Stack height: 20mm – 150mm ±0.05mm tolerance
• Core loss (P1.5/400): ≤ 12.8 W/kg (reference M330-35A) → up to 32% reduction vs conventional grades
• Slot fill factor achievable: 91% – 94% with precision insertion tooling
• Dielectric strength: >2000VAC for 1 min (epoxy coated)

Data source: Reenives in-house dyno & certified test reports (TÜV SÜD 2024), consistent with IEC 60404-2. Production lots follow SPC.

4. Key Applications of Large BLDC Motor Stator Cores

5. Engineering Selection Guide for Large BLDC Stator Cores

1. Define mechanical envelope: Outer/Inner diameter, stack length, mounting features.
2. Magnetic loading & frequency: Use 0.35mm for <400Hz, 0.27mm for high-speed 800Hz applications.
3. Thermal management: Epoxy coating improves heat dissipation by 18% vs standard varnish.
4. Tooling & segmentation: For large OD >350mm, segmented cores reduce material waste and winding complexity.
5. Sample validation: Reenives provides raw core loss test (Epstein frame) and mechanical flatness report within 10 days.

6. FAQ – Large BLDC Motor Stator Core Engineering

7. Maximize Your Large BLDC Motor Efficiency – Partner with Reenives

8. Dongguan Runlu Motor Technology Co., Ltd.