The Model of a Homopolar Electric Motor with High-Temperature Superconductors

  • Andrey V. NAUMOV
  • Alexey V. POLYAKOV
  • Mikhail I. SURIN
  • Vladimir I. SHCHERBAKOV
Keywords: high-temperature superconductivity, electric propulsion, electric motor, homopolar electric machine

Abstract

The electromechanical model for analyzing a homopolar electric motor with a magnetic system made using second-generation high-temperature superconductors (HTSC 2G) is described. Homopolar electric motors made with a disk-shaped rotor have the simplest design of their magnetic system and heavy-current contact. Owing to the use of HTSC 2G conductors for producing constant magnetic field in the rotor area, it becomes possible to achieve a higher current density in the windings, thereby increasing the motor power capacity. Due to the HTSC ability to operate at the liquid nitrogen temperature (77 K), it becomes possible to have a simpler cryostat design in comparison with magnetic systems based on low-temperature superconductors. For large-capacity homopolar motors, the use of liquid metal contacts for supplying current to the rotating rotor seems to be the most promising design solution. The advantage of motors of this type is that their torque depends linearly on the rotor current. The homopolar motor operation governed by a proportional-integral-differentiating (PID) controller was simulated using the SciLab Xcos software. The application of the analysis model for selecting the optimal PID-controller coefficients is demonstrated. The electric motor dynamic operation modes are analyzed. The numerical simulation results are compared with the previously obtained experimental data.

Author Biographies

Andrey V. NAUMOV

(Kurchatov Complex of NBICS Nature-Like Technologies of National Research Centre “Kurchatov Institute”, Moscow, Russia) – Leading Engineer of the Superconductivity Dept.

Alexey V. POLYAKOV

(Kurchatov Complex of NBICS Nature-Like Technologies of National Research Centre “Kurchatov Institute”, Moscow, Russia) – Research Scientist of the Superconductivity Dept.

Mikhail I. SURIN

(Kurchatov Complex of NBICS Nature-Like Technologies of National Research Centre “Kurchatov Institute”, Moscow, Russia) – Deputy Head of the Superconductivity Dept., Dr. Sci. (Eng.).

Vladimir I. SHCHERBAKOV

(Kurchatov Complex of NBICS Nature-Like Technologies of National Research Centre “Kurchatov Institute”, Moscow, Russia) – Head Specialist of the Superconductivity Dept.

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Published
2021-04-16
Section
Article