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

1986-04-18

1988-03-15

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

318135, 318 38, 310 12, 310 13, 104291, 104292, 104290, G05B 1100

Patent

active

047315695

ABSTRACT:
A magnet controller for a magnetically suspended vehicle of the linear stator type for travelling along a rail track (1) forming a linear stator having teeth of uniform determined width, responds to a rectified control signal. The control parameters for the magnet controller (21) are adjusted in response to speed to assure a stable control during standstill and at low speeds and to achieve a good response or follower characteristic of the control system at high speeds. A speed representing signal (U.sub.v) is generated in a conductor loop, preferably a double loop (9), inserted into a groove (10) of the poles (5) of the levitation magnets (2). The signal (U.sub.v) generated in the conductor loop is rectified at (31), and if desired passed through a low-pass filter (32) to provide the control input signal for the controller (21) by a very simple circuit. Utilizing just the amplitude of the speed signal (U.sub.v) has been found to be satisfactory for achieving a stable closed loop control of the magnetically suspended vehicle.

REFERENCES:
patent: 3894275 (1975-07-01), Baumans et al.
patent: 3904942 (1975-09-01), Holtz
patent: 3914669 (1975-10-01), Holtz
patent: 3914670 (1975-10-01), Holtz
patent: 3919607 (1975-11-01), Habock et al.
patent: 4368413 (1983-01-01), Tazaki
patent: 4505206 (1985-03-01), Gottzein et al.
patent: 4509001 (1985-04-01), Wakabayashi et al.
patent: 4595870 (1986-06-01), Chitayat
patent: 4626749 (1986-12-01), Asakawa

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