Table 5 Thermal performance metrics for both machines (DSM and SSM)50,51,52.
From: Optimized FOC control strategy for dual stators permanent magnet machine
Parameter | DSM (50 kW) | SSM (50 kW) |
|---|---|---|
Copper loss distribution | ~ 25 W/cm2 split across two stators (12.5 W/cm2 each) | ~ 25 W/cm2 concentrated in one stator |
Peak current density (A/mm2) | 4–5 | 8–10 |
Hotspot temperature rise (°C) | 55–70 | 100–130 |
Thermal load per stator (W/cm2) | 1.0–1.2 | 2.2–2.5 |
Cooling flow rate requirement (L/min) | 12–18 per stator (24–36 total) | 30–35 overall |
Rotor temperature rise (°C) | 70–95 | 60–85 |
Cooling system complexity | Medium to High (dual circuits) | Low to Medium (single circuit) |
Thermal efficiency gain (%) | 15–20% better than SSM | Baseline |
Cooling system description | Dual independent cooling circuits; moderate complexity due to split design | Single cooling circuit; simpler but requires higher capacity |
