A low loss permanent magnet brushless DC motor utilizing tape wound amorphous iron

Author

Jensen, Chris C. ; Profumo, Franco ; Lip, Thomas A.

Author_Institution

Fermi Nat. Accel. Lab., Batavia, IL, USA

fYear

1990

fDate

7-12 Oct. 1990

Firstpage

281

Abstract

An axial-field permanent magnet brushless DC motor which utilizes tape-wound amorphous iron is proposed. Simplified waveforms and performance equations for this type of machine are presented. The machine equations and waveforms are verified with a proof-of-concept machine. No-load iron losses are compared with manufacturers´ data, and full-load iron losses are also presented. Output torques for rectangular and trapezoidal current waveforms are measured and compared, and explanations for the differences are proposed. Machine designs from a computer program which demonstrate the possible benefits for this type of machine are presented. It is suggested that this type of machine could be considerably more efficient than induction machines and, additionally, cost competitive when a variable-speed drive is already a system requirement.<>

Keywords

DC motors; losses; permanent magnet motors; stators; synchronous motors; axial field motor; brushless DC motor; losses; machine equations; permanent magnet motor; proof-of-concept machine; rectangular current waveforms; tape wound amorphous Fe; trapezoidal current waveforms; Amorphous materials; Brushless DC motors; Costs; Current measurement; Induction machines; Iron; Magnetic losses; Manufacturing; Torque measurement; Wounds;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting, 1990., Conference Record of the 1990 IEEE

Conference_Location

Seattle, WA, USA

Print_ISBN

0-87942-553-9

Type

conf

DOI

10.1109/IAS.1990.152199

Filename

152199