Patent ID: 6515388
Filing Date: 2003-02-04
Classification: F16C,H02N

Abstract:
A magnetic levitation control apparatus, comprising:a digital controller for controlling the levitation position of a levitated body through the utilization of magnetic attraction of electromagnets; said digital controller generating a carrier signal and a position control signal necessary for detecting the position and controlling the position of the levitated body, the carrier signal and the position control signal being sent through a digital-to-analog converter arrangement to the electromagnets, a current signal from the electromagnets being input through an analog-to-digital converter arrangement to the digital controller, synchronous detection of the current signal from the electromagnets being performed by the controller to utilize the electromagnets as a position detecting sensor for detecting the position of the levitated body; and a position control signal being generated by the controller based on the results of the position detection, converted to an analog signal by the digital-to-analog converter, and sent through a power amplifier to the electromagnets, whereby the position detection and the position control are simultaneously performed.