A dual stator motor is an electric machine featuring two independent stator assemblies — typically arranged as an inner stator and outer stator with a shared rotor in between. This architecture is designed to maximize the utilization of internal space, significantly enhancing power density without increasing motor volume. Dual stator motors are ideal for applications requiring high torque, redundancy, or the ability to supply multiple voltages from a single machine. In the context of UAV propulsion, a dual-stator permanent magnet synchronous motor (DS-PMSM) enables active/active or active/stand-by torque-summing configurations, improving both performance and reliability.

Reenives manufactures precision dual stator laminations using non-grain oriented silicon steel (0.20mm/0.35mm) with advanced C5 epoxy coating — achieving stacking factor ≥98.2% and supporting dual-stator topologies for UAV, eVTOL, and EV applications.

Reenives offers dual stator lamination solutions across multiple topologies to meet diverse application requirements:

• By Architecture: Dual-Stator Single-Rotor (DSSR) — most common for UAV/eVTOL; Dual-Stator Dual-Rotor (DSDR) for high-power EV and aerospace applications.
• By Slot/Pole Config: Inner stator 12N14P + Outer stator 12N14P (balanced torque/speed for UAVs); 24N20P+ for EV traction; unequal-slot designs for torque ripple reduction.
• By Material Thickness: 0.20mm (high-frequency FPV/UAV) and 0.35mm (general industrial and EV).
• By Winding Connection: Dual independent three-phase windings (active/active configuration); series-connected for single-drive operation.
• By Insulation Coating: C5 epoxy powder coating (Class H, 180°C) with ≥1800V dielectric strength.

💡 Reenives specialty: private mould development for custom dual stator geometries — including unequal-slot designs that reduce torque ripple and optimize power density for specific UAV/EV platforms.

All parameters validated by Reenives R&D center and third-party testing per IEC 60404-2. Dual stator performance data from TERSA UAV project (Italian Government-funded) and IEEE dual-stator motor studies.

📐 Data source: Reenives quality assurance lab, IEEE Xplore dual-stator studies, TERSA UAV project (Sky Eye Systems / University of Pisa). Full batch traceability and test certificates available.

Reenives dual stator laminations power critical applications across multiple sectors:

• Long-Endurance UAVs: Dual-stator architecture provides redundancy and fault tolerance — TERSA UAV (35kg MTOW, 6h endurance, 100km range) uses dual-stator AF-PMSM with 3.5kW peak power.
• eVTOL Propulsion: High torque density and multiple voltage/frequency outputs from a single machine, reducing weight and volume.
• EV Traction Motors: Dual-stator motors achieve higher torque-speed range with reduced ripple in low-to-mid speed regions, suitable for direct-drive hub-motor applications.
• Industrial Robotics & Servo Drives: Dual redundancy and enhanced torque quality for precision motion control.
• Marine & Aerospace Propulsion: High-reliability dual-stator architectures for strategic applications requiring multiple voltage/frequency outputs.

1. Define power and redundancy requirements: Determine peak power (e.g., 3.5kW for UAV FEPS), required redundancy level (active/active vs. active/stand-by), and target torque density.
2. Choose architecture and slot/pole configuration: DSSR for UAV/eVTOL; DSDR for EV traction. Select matched inner/outer stator slot counts (12N14P standard; unequal-slot designs for torque ripple reduction).
3. Select lamination material thickness: 0.20mm for high-frequency UAV (40-80kHz PWM) to minimize core loss; 0.35mm for robust EV applications.
4. Specify insulation and cooling: C5 epoxy coating for outdoor UAVs; oil-compatible insulation for EV/hybrid applications. Consider thermal management for dual-stator configurations.
5. Request samples and validation: Reenives delivers dual stator lamination samples with FAI reports and material certificates. Prototype samples ready in 7-10 days after design approval.

💡 Engineering support: Free DFM within 48h — send your motor spec or drawing to linda_reenives@163.com.