Аннотация: Для создания тяговых усилий в высокоскоростном наземном транспорте могут использоваться линейные синхронные двигатели. Для управления такими двигателями необходимо в реальном времени получать информацию о точном положении подвижной части. В статье рассматриваются варианты исполнения бесконтактных датчиков положения и скорости, применяемые в промышленности и на высокоскоростном наземном транспорте. Предложен вариант комбинированной системы определения скорости и положения для грузового Маглев.Ключевые слова: магнитолевитационный транспорт, линейные синхронные двигатели, датчики положения и скорости.
V. V. Nikitin, S. A. Gulin, E. G. Sereda Petersburg State Transport University Emperor Alexander I SPEED AND POSITION DETECTING SYSTEMS FOR VEHICLE WITH LINEAR SYNCHRONOUS MOTORSAbstract: In high-speed ground transport linear synchronous motors are used to create a traction force. Advantages of linear synchronous motors are precise control of traction force (does not depend on friction forces) and lack of wearing parts. Linear synchronous motors control systems use block diagrams with orientation on rotor flux linkage. In such systems, information about exact position of movable part allows splitting active and reactive components of stator currents and as result independent control of motor traction force and magnetic flux. Errors in determination position can lead to errors in d-q transformation what affect calculations performed in motor model, and impact on traction force. Moreover, information on position of vehicle is also important to ensure traffic safety. In conventional types of wheeled vehicles for determining speed and position contact probes and tachometers are used. However, in high-speed magnetic levitation transport non-contact sensors is needed. In addition, when creating control system delay in transmission of radio signals from vehicle to ground control unit should be taken into account.
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