Static and dynamic characteristics of the permanent magnet suspension with a mechanical air gap control for transport vehicle were investigated. The dynamic characteristics of the vehicle were investigated by using a simplified sprung and unsprung mass model. A stability criterion for magnetic levitation was shown. The effects of a dead zone in the mechanical air gap controller on a levitation performance of the vehicle were investigated by simulation with a full scale vehicle model. The effect of nonlinear characteristics were also discussed. Fiels test results with actual transport vehicle were shown and dynamic charakteristics of the vehicle were presented. Main results of the work are summarized as follows: The mechanical air gap controller can achieve 95 % levitation rate (static) when the load variation is less than +/- 20 % of the vehicle total weight. Levitation stability is determined by the relation between the equivalent spring rate, stiffness of the guide wheel and a control lever ratio. Stable levitation is achieved by a large control lever ratio. A levitation performance of the vehicle is largely effected by a dead zone in the mechanical air gap controller, and the deterioration of a levitation performance is suppressed by a control lever ratio that is larger than 3. The effect of nonlinear characteristics of magnet force appears when a dead zone width is larger than 0.6 mm and the effect can be suppressed by a large control lever ratio or a nonlinear primary spring. Field test results that a dynamic guide wheel loads is less than 20 % of the vehicle total weight for the most part, which emplies the levitation rate (dynamic) is more than 80 %, when the vehicle speed is 48 km/h.
Permanent magnet suspension for Maglev transport vehicle: Design of mechanical air gap control system
Magnetschwebebahn mit Dauermagnetaufhängung: Entwurf des mechanischen Luftspaltreglers
1996
20 Seiten, 19 Bilder, 1 Tabelle, 15 Quellen
Aufsatz (Konferenz)
Englisch
Permanent magnet suspension for Maglev transport vehicle
SLUB | 1997
|Permanent magnet suspension for Maglev transport vehicle
TIBKAT | 1997
|Taylor & Francis Verlag | 1996
|British Library Conference Proceedings | 1996
|