scholarly journals Design and Optimization Strategies for Muscle-Like Direct Drive Linear Permanent Magnet Motors

2010 ◽  
Author(s):  
B. Ruddy ◽  
I. Hunter
Keyword(s):  
Permanent Magnet ◽  
Direct Drive ◽  
Permanent Magnet Motors ◽  
Design And Optimization

scholarly journals Direct Drive Applications: Possible Replacement of Rare-Earth Permanent Magnet Motors

Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 8058
Author(s):  
Chaelim Jeong ◽  
Luca Cinti ◽  
Nicola Bianchi
Keyword(s):  
Rare Earth ◽  
Permanent Magnet ◽  
Low Energy ◽  
Direct Drive ◽  
Permanent Magnet Motors ◽  
Stator Flux ◽  
Type Motor

This paper deals with the possibility to replace rare-earth permanent magnet (PM) motors in direct drive applications. According to previous researches, there are alternatives such as surface-mounted PM motors and spoke-type motors adopting Ferrite PMs, synchronous reluctance motors, with or without the assistance of low-energy PMs. Few studies have been carried out to compare all models at once, thus it is hard to choose which type motor is to be preferred as a valid alternative of rare-earth PM motors in direct drive applications. In this paper, the representative candidates listed above are analyzed and the results are compared with that of a rare-earth PM motor, which is considered as a reference motor. Additionally, the demagnetization phenomenon of the motors with Ferrite PMs is deeply analyzed because this kind of PM may be easily demagnetized by the stator flux. Finally, both strengths and weaknesses of each alternative motors are highlighted.

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