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High speed operation of permanent ma...

The University of Wisconsin - Madison.

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High speed operation of permanent magnet machines.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	High speed operation of permanent magnet machines./
作者:	EL-Refaie, Ayman M.
面頁冊數:	572 p.
附註:	Source: Dissertation Abstracts International, Volume: 66-12, Section: B, page: 6807.
Contained By:	Dissertation Abstracts International66-12B.
標題:	Engineering, Electronics and Electrical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3200101
ISBN:	9780542469152

High speed operation of permanent magnet machines.
EL-Refaie, Ayman M.

High speed operation of permanent magnet machines. - 572 p.

Source: Dissertation Abstracts International, Volume: 66-12, Section: B, page: 6807.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2005.

This work proposes methods to extend the high-speed operating capabilities of both the interior PM (IPM) and surface PM (SPM) machines. For interior PM machines, this research has developed and presented the first thorough analysis of how a new bi-state magnetic material can be usefully applied to the design of IPM machines. Key elements of this contribution include identifying how the unique properties of the bi-state magnetic material can be applied most effectively in the rotor design of an IPM machine by "unmagnetizing" the magnet cavity center posts rather than the outer bridges. The importance of elevated rotor speed in making the best use of the bi-state magnetic material while recognizing its limitations has been identified.

ISBN: 9780542469152Subjects--Topical Terms:

626636
Engineering, Electronics and Electrical.

High speed operation of permanent magnet machines.
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245 1 0 $a High speed operation of permanent magnet machines.
300 $a 572 p.
500 $a Source: Dissertation Abstracts International, Volume: 66-12, Section: B, page: 6807.
500 $a Supervisor: Thomas M. Jahns.
502 $a Thesis (Ph.D.)--The University of Wisconsin - Madison, 2005.
520 $a This work proposes methods to extend the high-speed operating capabilities of both the interior PM (IPM) and surface PM (SPM) machines. For interior PM machines, this research has developed and presented the first thorough analysis of how a new bi-state magnetic material can be usefully applied to the design of IPM machines. Key elements of this contribution include identifying how the unique properties of the bi-state magnetic material can be applied most effectively in the rotor design of an IPM machine by "unmagnetizing" the magnet cavity center posts rather than the outer bridges. The importance of elevated rotor speed in making the best use of the bi-state magnetic material while recognizing its limitations has been identified.
520 $a For surface PM machines, this research has provided, for the first time, a clear explanation of how fractional-slot concentrated windings can be applied to SPM machines in order to achieve the necessary conditions for optimal flux weakening. A closed-form analytical procedure for analyzing SPM machines designed with concentrated windings has been developed. Guidelines for designing SPM machines using concentrated windings in order to achieve optimum flux weakening are provided.
520 $a Analytical and numerical finite element analysis (FEA) results have provided promising evidence of the scalability of the concentrated winding technique with respect to the number of poles, machine aspect ratio, and output power rating. Useful comparisons between the predicted performance characteristics of SPM machines equipped with concentrated windings and both SPM and IPM machines designed with distributed windings are included.
520 $a Analytical techniques have been used to evaluate the impact of the high pole number on various converter performance metrics. Both analytical techniques and FEA have been used for evaluating the eddy-current losses in the surface magnets due to the stator winding subharmonics. Techniques for reducing these losses have been investigated.
520 $a A 6kW, 36slot/30pole prototype SPM machine has been designed and built. Experimental measurements have been used to verify the analytical and FEA results. These test results have demonstrated that wide constant-power speed range can be achieved. Other important machine features such as the near-sinusoidal back-emf, high efficiency, and low cogging torque have also been demonstrated.
590 $a School code: 0262.
650 4 $a Engineering, Electronics and Electrical. $3 626636
650 4 $a Physics, Electricity and Magnetism. $3 1019535
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710 2 0 $a The University of Wisconsin - Madison. $3 626640
773 0 $t Dissertation Abstracts International $g 66-12B.
790 $a 0262
790 1 0 $a Jahns, Thomas M., $e advisor
791 $a Ph.D.
792 $a 2005
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3200101