Table 1.
Parameters of modified Emerson Electric motor and prototype made of soft magnetic composites (SMCs).
| Parameter | Modified Emerson Electric Motor | Prototype Made of SMCs |
|---|---|---|
| DC supply voltage | 310 V | 310 V |
| Max. rotational speed | 9000 rpm | 9800 rpm |
| External stator diameter | 139.5 | 139.5 |
| External rotor diameter | 83 mm | 83 mm |
| Axial length of magnetic core | 47.3 mm | 46.6 mm |
| Air gap length | 0.4 mm | 0.25 mm |
| Number of phases | 3 | 3 |
| Number of stator poles | 12 | 12 |
| Number of rotor poles | 8 | 8 |
| Material of stator core | Steel lamination | Somaloy 700 |
| Material of rotor core | Steel lamination | Somaloy 700HR |
| Phase resistance | 8.4 ± 0.3 Ω | 5.7 ± 0.3 Ω |
| Coil turns | 172 | 134 |
| Wire diameter | 0.56 mm | 0.60 mm |
| Phase inductance—aligned | 242 mH | 139 mH |
| Phase inductance—unaligned | 36 mH | 24 mH |
| Stator pole angle | 15.5° | 15.5° |
| Rotor pole angle | 16° | 16° |