Dongguan Yixing Magnetic Products Co., Ltd.-Motor

Intergrated Outer Rotor Assembly

Modular Permanent Magnet Assembly – ideally suited for brushless motor outer rotors, customizable for inner stators, providing one-step integration for high-end drive systems.

Performance Improvement

Motor efficiency +1%–3%, cogging torque & noise reduced

Same output: weight -15%–25%, volume -10%–20%

Dimensional accuracy ±0.01–0.02mm, magnetic performance ≤ ±3%

In-house control, high yield, consistent performance

Quality

Consistency

Reliability

Cost

Optimization

NdFeB material -20%–30%

Total cost -8%–15%, production loss <1%

Up to 20,000–30,000rpm, no magnet detachment

Salt spray 48–72h rust-free, demagnetization <2%

Parameter	Typical Value / Options	Description
Mechanical Dimensions
Outer Diameter	φ20–φ150mm (customizable)	Rotor housing outer diameter
Inner Diameter	Custom per outer diameter	Rotor inner cavity diameter
Active Length	5–100mm (customizable)	Axial effective length of magnets
Shaft Diameter	φ3–φ20mm (customizable)	Center output shaft diameter
Coaxiality	≤0.01–0.02mm	Concentricity between rotor and shaft
Balancing Grade	G2.5 / G6.3	Vibration control at high speed
Magnetic Performance
Magnet Grade	N35–N52M/H/SH/UH/EH	Covers various temperature & performance needs
Magnetization Direction	Radial / Tangential / Hybrid / Halbach	Determines magnetic field distribution
Pole Count	8–24 poles (customizable)	Matches motor winding design
Air Gap Flux Density	0.7–1.2T (design dependent)	Air gap magnetic field strength
Batch Magnetic Deviation	≤±3%	Ensures motor performance consistency
Materials & Processes
Magnet Material	Sintered NdFeB	Core magnetic material
Housing Material	Stainless Steel / Mild Steel / Aluminum Alloy	Structural support & protection
Fixing Method	Adhesive Bonding / Overmolding / Sleeve Clamping	High-speed & vibration resistance
Surface Treatment	Ni-Cu-Ni / Epoxy / Zn / Parylene	Corrosion & insulation protection
Environmental Reliability
Operating Temperature	-40℃~150℃ (grade dependent)	Temperature limit per magnet grade
Max Rotational Speed	20,000–30,000rpm (customizable)	Safe speed limit based on structure
Salt Spray Resistance	48–72h no red rust	Corrosion resistance
Irreversible Demagnetization	<2% (after 100 thermal cycles)	Magnetic stability under thermal shock
Vibration Resistance	10–2000Hz, 10g (per standard)	Mechanical vibration resistance
Customization & Delivery
Product Type	Outer Rotor Assembly / Inner Stator Magnetic Ring	Adapts to different motor topologies
Prototype Lead Time	7–15 days	Fast validation support
Mass Production Lead Time	15–30 days	Batch delivery capability
MOQ	50–100pcs (negotiable)	Flexible production for small/large batches