Apparatus for controlling a magnet in a magnetically suspended v

Details Apparatus for controlling a magnet in a magnetically suspended v Apparatus for controlling a magnet in a magnetically suspended v

1985-03-25

1986-05-06

Dobeck, B.

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

318135, 310 12, 104290, G05B 1100

Patent

active

045874727

ABSTRACT:
The levitating force of the levitation magnets of a magnetically levitated ehicle of the linear stator type is controlled for regulating the air gap width (S) between these levitation magnets (2) and a rail track having teeth of uniform, determined width in the travel direction. The control is responsive to the air gap width and, if desired, to the differentiation of the air gap width with respect to time. The control requirements are dependent on the vehicle speed, whereby in the low speed and stopping situations the primary task is a stabilizing one and in higher speed situations the primary task is a good following behavior. For this purpose a steering signal is derived from the output terminals of an induction conductor loop located in the surface of a pole piece of a levitation magnet facing the track teeth. The loop has a width corresponding to the tooth width. The frequency of the signal induced in the loop is directly proportional to the vehicle speed. The steering signal passes through an adapting circuit and is supplied to the magnet control circuit whereby the control parameters are adjusted according to the vehicle speed in order to fulfil the control requirements in the whole speed range.

REFERENCES:
patent: 3622818 (1971-11-01), Payen
patent: 3679958 (1972-07-01), Peleno
patent: 4368413 (1983-01-01), Tazaki
patent: 4509001 (1985-04-01), Wakabayashi et al.

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