University of Malta
 

Heat Transfer in Electrical Machines
UOM Main Page
 
 
 
Apply - Admissions 2016
Newspoint
Facebooktwitter
Follow the Faculty...

Description 

Due to market demands and material cost, electrical machines are becoming more compact and therefore generate higher heat densities. Variable speed,inverter driven machines present an additional heat source due to the harmonics supplied by the inverter.Additionally the cooling characteristics of such inverter driven machines are reduced at lower operating speeds. All this gives rise to a temperature increase in the machines which affects the performance and life expectancy of the machines.

The maximum temperature permitted in a machine is dictated by the insulation material in the windings. This temperature barrier can be tackled either by improving the insulation material or by improving the cooling characteristics of the machines. Since in recent years the insulation material has been improved considerably, a point has been reached where no additional feasible gain can be achieved by improving further the insulation material. Consequently the department of Mechanical Engineering is actively investigating methods to improve the air flow so as to enhance cooling in electrical machines.

Thermal management in these high power density machines is quite demanding and requires specialised tools and techniques such as Computational Fluid Dynamics (CFD).

heat_transfer_in_electrical_machines 

Funded Projects

Selected Publications

  • Connor P, Pickering S J, Gerada C, Eastwick C N, Micallef C, Tighe C,Computational fluid dynamics modelling of an entire synchronous generator for improved thermal management,IET Electric Power Applications, Volume 7, Issue March 2013
  • Gerada D, Borg-Bartolo D, Mebarki A, Micallef C, Brown N L and Gerada C,Electrical machines for high speed applications with a wide constant-power region requirement,Journal of International Conferences on Electrical Machines and Systems (JICEMS)
  • Gerada, D., Borg-Bartolo, D., Mebarki, A., Micallef, C., Brown, N.L. and Gerada, C.,Electrical machines for high speed applications with a wide constant-power region requirement,International Conference on Electrical Machines and Systems (ICEMS), Beijing, China
  • Borg-Bartolo, D., Gerada D., Micallef, C., Mebarki, A.,Brown, N.L. and Gerada,Thermal modelling and selection of a high speed permanent magnet surface mount electrical machine,6th IET International Conference on Power Electronics, Machines and Drives (PEMD 2011), Bristol, UK
  • Connor P, Pickering S J, Gerada C, Eastwick C N and Micallef C,CFD Modelling of an entire synchronous generator for improved thermal managemen,6th IET International Conference on Power Electronics, Machines and Drives (PEMD 2011), Bristol, UK
  • Saliba, A. and Micallef, C.,Investigating the cooling performance of the end region of a small Totally Enclosed Fan Cooled (tefc) induction motor,5th IET International Conference on Power Electronics, Machines and Drives (PEMD 2010), Brighton, UK
  •  

 


Calendar
Notices
 
 
Last Updated: 4 May 2015

Log In back to UoM Homepage