Abstract
This paper introduces in brief the traction system of a permanent magnet electrodynamic suspension (EDS) train. The synchronous traction mode based on long stators and track cable is described. A speed and position detection system is recommended. It is installed on board and is used as the feedback end. Restricted by the maglev train’s structure, the permanent magnet electrodynamic suspension (EDS) train uses the non-contact method to detect its position. Because of the shake and the track joints, the position signal sent by the position sensor is always aberrant and noisy. To solve this problem, a linear discrete track-differentiator filtering algorithm is proposed. The filtering characters of the track-differentiator (TD) and track-differentiator group are analyzed. The four series of TD are used in the signal processing unit. The result shows that the track-differentiator could have a good effect and make the traction system run normally.
Highlights
A permanent magnet electrodynamic suspension (EDS) train uses a linear motion actuator to achieve traction [1]
To make the traveling magnetic field synchronize with the magnetic field produced by the permanent magnet, the traction system needs to detect the position of the secondary, only so the current can be modulated to control the output force
The sensors are affected by all kinds of magnetic field, including the traveling magnetic field and the suspension magnetic field. These problems are different from the speed detection of the electric rotating motor, so this paper examines the sensors’ signal processing, dealing especially with error signal
Summary
A permanent magnet electrodynamic suspension (EDS) train uses a linear motion actuator to achieve traction [1]. The synchronous traction system of a permanent magnet EDS train comprises the speed and position detection system, the radio unit, ground traction system and traction power module. During the slow running period, the position of the train is determined by sensors This kind of method is used in electric rotating motors. The sensors are affected by all kinds of magnetic field, including the traveling magnetic field and the suspension magnetic field These problems are different from the speed detection of the electric rotating motor, so this paper examines the sensors’ signal processing, dealing especially with error signal
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