1 / 15

Freddy Magnussen, Dmitry Svechkarenko, Peter Thelin, Chandur Sadarangani

NORPIE 2004 14-16 June, Trondheim, Norway Analysis of a PM Machine with Concentrated Fractional Pitch Windings. Freddy Magnussen, Dmitry Svechkarenko, Peter Thelin, Chandur Sadarangani. Layout of presentation. Introductio n. Presentation of machine design.

haley
Télécharger la présentation

Freddy Magnussen, Dmitry Svechkarenko, Peter Thelin, Chandur Sadarangani

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. NORPIE 200414-16 June, Trondheim, NorwayAnalysis of a PM Machine with Concentrated Fractional Pitch Windings Freddy Magnussen, Dmitry Svechkarenko, Peter Thelin, Chandur Sadarangani

  2. Layout of presentation • Introduction • Presentation of machine design • Torque ripple computation results • Parasitic effects (noise and losses) • Laboratory prototype and measurements • Thermal computation results • Conclusions

  3. Machine design: 14 poles and 15 slots • q=0,36 (number of slots per pole per phase; normally 0,5) • kw1=0,95 (fundamental winding factor; normally 0,87) • Grain-oriented iron teeth, non-oriented iron yoke • Rectangular copper conductors, cf=0,74

  4. Electromotive force

  5. FEM-computed torque ripple • Pure sinusoidal q-current  no inverter influence • Current loadings: 0, 103, 207, 413 and 827 A/cm (RMS)

  6. Air gap flux density • No-load flux density • Armature reaction for the current loading 827 A/cm (RMS)

  7. Flux density in rotor back (Machine C) • Tangential flux density component at 2000 rpm • Current loadings: 0, 103, 207, 413 and 827 A/cm (RMS)

  8. Radial magnetic stress in air gap • Unbalanced radial forces  noise

  9. Some radial vibration mode shapes

  10. Prototype stator

  11. Measurement results • High speed low torque : iron loss thermal influence • Low speed high torque : copper loss thermal influence Generator tests Motor tests

  12. Thermal computations (I) Water-cooling cylinder Aluminium frame Cooling duct Velocity profile

  13. Thermal computations (II) Inlet water: 22ºC [K] Max 139ºC Max 157ºC Max 86ºC Max 98ºC

  14. Conclusions • Cost effective manufacturing process • High torque density (5,0 Nm/kg) • Low torque ripple • Concentrated winding machines with an odd number of slots and an almost equal number of poles (e.g 8/9, 14/15, 20/21) are sensitive to these parasitic effects: • Unbalanced radial forces  noise • Alternating magnetic fields in the rotor  losses

  15. Thank you!

More Related