Reactive compensation of long primary HTS‑linear synchronous machines

Keyu Guo; Yaohua Li; Liming Shi; Yumei Du

Reactive compensation of long primary HTS‑linear synchronous machines

Vol. 22, No. 5, pp. 796-808, May 2022

10.1007/s43236-022-00402-4

High-temperature superconducting

Linear synchronous machine

Compensation windings

Armature reaction voltage

Power factor

Abstract

In propulsion systems requiring high speed and high acceleration, the long primary high-temperature superconducting linear synchronous machine (HTS-LSM) is a competitive candidate, since it can provide steady and high thrust. However, the armature windings on the long primary uncovered by a mover with HTS magnets can cause large flux leakage, which can lead to a high armature reaction voltage and a poor power factor. In this paper, to restrain the armature reaction voltage of the long primary HTS-LSM, compensation windings are proposed for installation on the primary. First, a mathematical model of a five-phase four-pole long primary HTS-LSM is established, and it is determined that the high armature reaction voltage is caused by the large self-inductance of uncovered armature windings. Then, compensation winding is applied in the armature winding to reduce the equivalent self-inductance. Four different compensation winding installation positions are studied and compared. To prevent the current in the compensation windings from affecting the function of the HTSracetrack magnet on the mover, a switch control strategy for the compensation windings is proposed. Finally, prototypes of armature windings with compensation windings are manufactured and the effectiveness of the compensation windings are validated and compared.

Statistics

Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.

Cite this article

[IEEE Style]

K. Guo, Y. Li, L. Shi, Y. Du, "Reactive compensation of long primary HTS‑linear synchronous machines," Journal of Power Electronics, vol. 22, no. 5, pp. 796-808, 2022. DOI: 10.1007/s43236-022-00402-4.

[ACM Style]

Keyu Guo, Yaohua Li, Liming Shi, and Yumei Du. 2022. Reactive compensation of long primary HTS‑linear synchronous machines. Journal of Power Electronics, 22, 5, (2022), 796-808. DOI: 10.1007/s43236-022-00402-4.