Electric Machine Design Course

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Electric Machine Design Course
Mod 1 Copyright: JR Hendershot 2012
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Electric Machine Design Course
Presentation transcript:

Electric Machine Design Course Electric Machine Cooling Strategies Lecture # 34 Mod 34 Copyright: JR Hendershot 2012

Cooling paths for shaft mounted fans Mod 34 Copyright: JR Hendershot 2012

Large stator with cooling passages Mod 34 Copyright: JR Hendershot 2012

Stator core vent plates Mod 34 Copyright: JR Hendershot 2012

Thermal conductivity of various materials Mod 34 Copyright: JR Hendershot 2012

Machine cooling media options Mod 34 Copyright: JR Hendershot 2012

Examples of stator liquid jackets Mod 34 Copyright: JR Hendershot 2012

Stator spiral liquid sleeve Mod 34 Copyright: JR Hendershot 2012

External cooling fans & External cooling fins Mod 34 Copyright: JR Hendershot 2012

Classes of IEC electric motor enclosures Mod 34 Copyright: JR Hendershot 2012

Extruded fins for motor frame cooling Axial fins on frame for either vertical convection cooling or forced axial fan cooling Is a combination cooling fin design possible? Concentric-radial frame fins suitable for horizontal cooling Mod 34 Copyright: JR Hendershot 2012

Convection cooling of motor frame Mod 34 Copyright: JR Hendershot 2012

Motor frame fins for cooling designs Test data provided By Erland Persson Mod 34 Copyright: JR Hendershot 2012

Stator winding temperature monitoring Thermocouples or RTDs for temperature measurements Poor practice: On coil surface On stator core On any taped areas Single sensor Good practice: One in slot One inside end turns Mod 34 Copyright: JR Hendershot 2012

Cooling a large machine Mod 34 Copyright: JR Hendershot 2012

Special low cost cooling fin design Mod 34 Copyright: JR Hendershot 2012

Stator cooling ducts with forced air cooling Mod 34 Copyright: JR Hendershot 2012

Internal rotor & stator cooling ducts General Electric Mod 34 Copyright: JR Hendershot 2012

Internal shaft mounted fan cooling Mod 34 Copyright: JR Hendershot 2012

Cooling zones in rotors & stators fo Large GE generator cooling paths Mod 34 Copyright: JR Hendershot 2012

Mod 34 Copyright: JR Hendershot 2012 Temperature rise vs time for AC IM traction machine with internal spray cooling Mod 34 Copyright: JR Hendershot 2012

Mod 34 Copyright: JR Hendershot 2012 Title Mod 34 Copyright: JR Hendershot 2012

Mod 34 Copyright: JR Hendershot 2012 Title Mod 34 Copyright: JR Hendershot 2012