SIMULATION OF SELF-CONTROL OF AN ELECTROSTATIC MICROMOTOR FOR AN INTRAVASCULAR ECHOGRAPHIC SYSTEM

In this paper, the possibility of using an electrostatic micromotor fo r an intravascular echographic system is studied. For this given appli cation, the advantage of a micromotor is the absence of a long cable b etween motor and minor. This advantage is real only if the micromotor speed can be controlled. In fact electrostatic micromotors are often u sed with a step-by-step power supply but, for low mean angular speed ( 2000 rpm), the rotation is not regular with this type of command. So, we propose herein a self-control command based on the rotor-position c ontrol carried out by a capacitance measurement. (C) 1997 Elsevier Sci ence S.A.