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Loading control by PWM-PAM combined drive

IP.com Disclosure Number: IPCOM000014327D
Original Publication Date: 2000-Aug-01
Included in the Prior Art Database: 2003-Jun-19

Publishing Venue

IBM

Abstract

Disclosed is a loading control method by a pulse drive method. First, a general velocity control method by back electromotive force is shown. In this document following notations are used: Vm: voltage applied to VCM coil Im: VCM current Rm: VCM coil resistance Vb: back electromotive force w : acutuator's radius velocity Kt: torque constant of VCM Electrical circuit theory provides following equations (a) and