Characteristics of axial-type HTS motor under different temperature conditions

Author

Jung, Hun-June ; Nakamura, Taketsune ; Muta, Itsuya ; Hoshino, Tsutomu

Author_Institution

Graduate Sch. of Eng., Kyoto Univ., Japan

Volume

13

Issue

2

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

2201

Lastpage

2205

Abstract

We tested an axial-type Bi-2223 bulk motor under different magnetic field and temperature conditions. Distributed armature windings with a pole number of four were used in order to compensate for the harmonic components in the air-gap magnetic flux density. The temperature was varied by evacuating the metal cryostat with a rotary vacuum pump. The fabricated motor demonstrated hysteresis characteristics when the temperature of the system was decreased and the magnetomotive force was adjusted to appropriate values. Then, synchronous speed at no-load condition was fulfilled. On the other hand, slip of rotational speed as well as inductive torque was induced when temperature and magnetic conditions were not satisfied. These results can be explained based on the pinning properties and AC loss inside the bulk rotor.

Keywords

bismuth compounds; calcium compounds; high-temperature superconductors; rotors; strontium compounds; superconducting machines; synchronous motors; torque; AC loss; Bi-2223 bulk rotor; Bi₂Sr₂Ca₂Cu₃O; air-gap magnetic flux density; axial-type HTS motor; distributed armature winding; flux pinning; hysteresis characteristics; inductive torque; magnetic field; magnetomotive force; rotational speed slippage; synchronous speed; temperature dependence; Air gaps; High temperature superconductors; Hysteresis motors; Magnetic fields; Magnetic flux; Magnetic flux density; Magnetic hysteresis; Synchronous motors; Testing; Torque;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2003.813036

Filename

1212056