A study of Maglev vehicle position detecting system using the feeding circuits
| Autor: | Takashige Saijo, Haruo Ikeda |
|---|---|
| Rok vydání: | 1986 |
| Předmět: |
Engineering
business.industry Acoustics Electrical engineering Energy Engineering and Power Technology Superconducting magnet Linear motor law.invention Computer Science::Robotics law Control system Maglev Electrical and Electronic Engineering business Synchronous motor Magnetic levitation Armature (electrical engineering) Electronic circuit |
| Zdroj: | Electrical Engineering in Japan. 106:115-124 |
| ISSN: | 1520-6416 0424-7760 |
| DOI: | 10.1002/eej.4391060413 |
| Popis: | This paper proposes a new magnetically levitated (MAGLEV) vehicle position detecting system using the feeding circuits. The linear synchronous motor adopted in a superconducting MAGLEV transportation system is composed of armature coils laid out on the ground along the guideway, and superconducting magnets installed aboard the vehicle. Phases of the electromotive forces are typically detected by a vehicle position detector and the vehicle is driven by controlled armature currents which are in-phase with the electromotive forces. In the position detecting system proposed here, a high-frequency signal wave is superposed on the armature current, and vehicle position is calculated using signal waves induced in the search coils mounted on the vehicle. As the vehicle runs, the amplitudes of the signal waves fluctuate. Signal frequency selection minimizes fluctuations of the amplitudes. The shapes of the search coils and signal wave processing that can detect vehicle position accurately are also shown. A phase-locked-loop is used for phase calculation of the linear synchronous motor, and a short sampling time of the control loop is found effective for accurate calculation. (AA) |
| Databáze: | OpenAIRE |
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