Loss reduction of a canned switched reluctance machine

The loss from cans is the main problem for canned machines especially at high speed. In this paper, different strategies are used to reduce can loss of a canned switched reluctance machine (SRM). Based on an ordinary SRM, the improvements includes investigating the rate of change of phase current, axial separation of the machine, and using longer cans. The torque and loss curves are used to judge the effects. Simulation shows that can loss is greatly reduced while the active torque is maintained, which makes operation of such canned machine feasible.

[1]  Yangguang Yan,et al.  A comparative study of winding factors between distributed windings and non-overlapping concentrated windings , 2008, 2008 Third International Conference on Electric Utility Deregulation and Restructuring and Power Technologies.

[2]  Paulo J. G. Lisboa,et al.  The use of canned rotors in high speed permanent magnet machines , 1991 .

[3]  R. C. Robinson,et al.  The Calculation of Can Losses in Canned Motors , 1957, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[4]  C. Laudensack,et al.  Investigation of different parameters on the performance of switched reluctance machines , 2010, The XIX International Conference on Electrical Machines - ICEM 2010.

[5]  C. Laudensack,et al.  An analytical network for switched reluctance machines with highly saturated regions , 2011, International Aegean Conference on Electrical Machines and Power Electronics and Electromotion, Joint Conference.

[6]  Y. Akiyama,et al.  The proposal of can loss estimation method of canned motor , 2007, 2007 International Conference on Electrical Machines and Systems (ICEMS).

[7]  C. Laudensack,et al.  Improved lumped parameter thermal model and sensitivity analysis for SR drives , 2010, The XIX International Conference on Electrical Machines - ICEM 2010.

[8]  Dieter Gerling,et al.  Loss analysis of a canned switched reluctance machine , 2011, 2011 International Conference on Electrical Machines and Systems.