Vector control of induction motors in high-speed rail

Modern high-speed train solutions incorporate propulsion systems with asynchronous and synchronous induction motors. The introduction of these types of motors is closely linked to the use of modern power electronics supply systems and, consequently, precise control. The traction network voltage is converted into a three-phase voltage, which powers the induction motors through converter systems. An appropriate type of control based on the principle of vector control allows for reliable rotational speed regulation and precise control over the torque developed during both acceleration and braking of the train.High-speed rail has been operating for almost 50 years, with the first line appearing around 1964, which was the Tokaido Shinkansen line. It was a response to the problem of congested traditional rail connections. A means of transport became necessary that would ensure efficient movement over long distances in a short time. Considering long distances, alternative road transport loses its significance due to the average transport speed and, consequently, longer travel time.
Looking for the best propulsion solutions for HSR, a jet propulsion was proposed in the first phase, which was replaced by electric propulsion for economic reasons and high noise levels. (…)

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