Zastosowanie nanokrystalicznych magnesów Nd-Fe-B w silniku skokowym

• Autorzy: Kaszuwara W. , Leonowicz M. , Długiewicz L.

Warianty tytułu

EN

Application of nanocrystalline Nd-Fe-B magnets in stepper motor

• Konferencja: Problemy eksploatacji maszyn i napędów elektrycznych (2004; Ustroń, Polska)
• Języki publikacji: PL

Abstrakty

EN

Magnetic properties of nanocrystalline magnets are determined not only by their composition but mainly by the microstructure. Nanocrystalline microstructure can be produced in RE-M (rare earth - transition metal) magnets such as NdFeB and SmFeN. The magnetic properties of such magnets are controlled by magnetic exchange interactions. The interactions lead to enhanced remanence, which causes that isotropic materials achieve properties close to those presented by the anisotropic magnets. Nanocrystalline magnets can be produced in a form of powders or ribbons, which are further consolidated to a fully dense material. These processes can not lead to grain coarsening. Thus they are generally based on resin bonding, however shock pressing, hot pressing and pulsed sintering can also be applied. An attempt of replacing Alnico magnets, in a FA-15 stepper motor produced by MIKROMA from Września, by nanocrystalline NdFeB bonded magnets, having different Nd contents and properties, has been undertaken. The studies of basic motor properties such as: one phase current, inductance of phase, holding torque, start-stop frequency, cut-off frequency and cut-of torque at frequency 400Hz, have shown that that they fulfill standards defined for motors with Alnico magnets, and in many cases exceed them. With application of the Nd12Fe82B6 magnets the holding torque and start-stop frequency increased by 28% and 41%, respectively, when compared with Alnico magnets. In the case of application of commercial MQP-0 powder, produced by Magnequench, the holding torque was higher by 55% and the start-stop frequency by 31%.

Słowa kluczowe

PL

magnes nanokrystaliczny; silniki skokowe

• Wydawca: Sieć Badawcza Łukasiewicz - Górnośląski Instytut Technologiczny
• Czasopismo: Maszyny Elektryczne : zeszyty problemowe
• Rocznik: 2004
• Tom: Nr 69
• Strony: 55--60
• Opis fizyczny: Bibliogr. 7 poz., tab., rys.

Twórcy

autor

Kaszuwara W.

• Politechnika Warszawska

autor

Leonowicz M.

• Politechnika Warszawska

autor

Długiewicz L.

• MIKROMA S.A.

Bibliografia

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• [3] Y.Luo, 15th Int. Workshop on RE Magnets and their Applications, Drezno, Niemcy, 1998, s. 15.
• [4] R.W.Lee, Appl.Phys.Lett., 46(1985)790.
• [5] I.R.Harris, 12lh Int. Workshop on RE Magnets and their Applications, Cambera, Australia, 1992, s. 347.
• [6] E.C.Stoner, W.P.Wohlfarth, Phil. Trans. Royal Soc, Londyn A240 (1948) 599.
• [7] H. A.Davies, J.Magn.Magn.Mat., 157/158 (1996) 11.