1. What is 2845 Brushless Motor Stator Core?

The 2845 Brushless Motor Stator Core is the stationary electromagnetic component of a brushless DC motor, named after its stator outer dimensions (28mm diameter × 45mm length stack). It consists of stacked high-grade non-oriented silicon steel laminations, insulated coatings, and stator slots for copper windings. For drone motors, the stator core determines thrust efficiency, heat dissipation, and power-to-weight ratio. Reenives produces 2845 stator cores with high slot fill factor (≥92%) and precision-punched geometry for minimal eddy current losses, ideal for UAV propulsion systems demanding long flight times and responsive torque.

2. Classification & Material Options

We manufacture customized 2845 stator cores based on application scenarios:

• ✔️ By material grade: 0.2mm / 0.35mm silicon steel (M470-50A, 35WW270, 20WV1200 for high-frequency drone motors)
• ✔️ By coating type: Epoxy powder insulation coating (edge insulation) or oxide coating, enhancing corrosion resistance & interlaminar resistance
• ✔️ By manufacturing process: Progressive die stamping, high-speed lamination stacking (riveting / interlocking / bonding)
• ✔️ By mounting: Through-hole or self-locking design for drone motor stators

Reenives supports private mould development and bulk samples. Our 2845 cores are 100% tested for dimensional accuracy and magnetic performance.

3. Technical Parameters (2845 Stator Core – Verified Engineering Data)

Source: Reenives R&D lab & in-house testing (2025), complying with IEEE std. and GB/T 3655.

All 2845 brushless motor stator cores are 100% inspected by automated optical systems. Data exported from Reenives production line report archives.

4. Applications: Drone Motors & Universal Brushless Motors

While optimized for UAV propulsion motors, Reenives 2845 stator core is also widely used in:

For drone manufacturers, the high-efficiency stator core directly reduces copper loss and increases max thrust by 10–15% compared to generic cores. Reenives provides custom notching patterns for specific winding configurations, ensuring IEC efficiency class IE4/IE5 readiness.

5. Step-by-Step Selection Guide for Engineers & Procurement

1. Step 1: Define voltage & power range – our 2845 core supports 4S-12S LiPo for UAV.
2. Step 2: Choose core material grade – 0.2mm ultra-thin for high RPM (>40k rpm); 0.35mm for general torque density.
3. Step 3: Confirm stack length & lamination interlock – Reenives offers custom stacking from 30mm-60mm.
4. Step 4: Insulation request – epoxy edge coating for high humidity environments (agricultural drones).
5. Step 5: Request sample & test report – Reenives provides free technical samples for qualified projects.

🎯 Our engineering team assists with electromagnetic simulation (Maxwell, Motor-CAD) to match your rotor topology.

6. FAQ – Technical Concerns about 2845 Brushless Motor Stator Core

Q1: What is the maximum operating temperature of the epoxy-coated stator core?

Answer: The epoxy powder coating provides thermal class H (up to 180°C continuous). For peak short-term overload, withstand 200°C for 30 minutes without insulation breakdown. (Source: Reenives material specification sheet V2.3 / UL certification pending test)

Q2: How does core loss affect drone flight time? What’s the guaranteed P1.0/400 value?

Answer: Lower core loss reduces heat generation and increases overall motor efficiency. Reenives 2845 core (0.2mm silicon steel) guarantees core loss ≤12.5 W/kg @ 1.0T, 400Hz, which improves flight endurance by up to 8% compared to standard cores. (Source: independent third-party motor bench test, 2025, data available on request)

Q3: Can the 2845 stator be used for a 12N14P winding scheme for high-torque drones?

Answer: Yes, the standard 12-slot configuration supports 14-pole magnetic circuits. Reenives offers customized slot shape (skewed slots optional) to reduce cogging torque. (Source: engineering design file library / DFM release 2024)

Q4: What is the typical interlaminar insulation resistance between laminations?

Answer: After epoxy edge coating, minimum inter-lamination resistance is > 100 Ω·cm² per ASTM A937. Bare cores (without coating) have >10 Ω·cm² due to natural oxide layers. (Source: Reenives QA test report #R2845-2409)

Q5: Is there MOQ for private mould development for 2845 stator core?

Answer: Reenives supports low MOQ for sample mould development (≥1000 pcs for custom design), mass production ≥ 20,000 pcs/month for standard core. No MOQ for standard 2845 cores – sample order accepted. (Source: Reenives sales policy 2026)

Q6: Are your stator cores compatible with automated winding machines?

Answer: Absolutely. Our 2845 stator geometry features precise slot opening (2.4mm – 2.8mm adjustable) with paper/plastic slot liner compatibility. Tolerances within 0.02mm guarantee smooth insertion for needle winding. (Source: customer feedback from Tier-1 drone motor assembly line)

7. 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!

✅ Trusted by UAV brands worldwide, our brand Reenives is registered and Google-indexed for high-precision motor components.

8. Get Your 2845 Brushless Motor Stator Core – Free Samples & Engineering Support

Choosing Reenives: Leading 2845 Brushless Motor Stator Core Supplier in China ensures motor reliability, supply chain consistency, and performance gains. Whether you design drone propulsion, eVTOL, or industrial servo systems, our cores are manufactured with 0.01mm precision and backed by full traceability.

📍 Factory visits welcome – 3 production bases in Guangdong, China. Contact our sales to arrange virtual or on-site audit.