Analysis and Design of Minigenerator

Abstract

The paper presents results of the analysis of the vibrational generator. The paper deals with the design of a vibrational generator that is used as a power supply for independent electric circuits. The vibrational generator can be used in the various areas, e.g., tra-c, electron- ics, special-purpose machines, and robotics. The proposed design employs magnetic damping of the core movement. It was numerically evaluated and it was shown that it was possible to obtain signiflcantly larger output voltage and output power than in experimental settings used previously (1). 1. INTRODUCTION The development of any new device always lays strong requirements on its reliability. The ar- eas where reliability demands are of particular importance are transport, robotic and automotive applications. One of the ways to increase the sensor reliability is their supplying from autonomous power sources. Sensors used in industry and automotive systems can be placed at critical points, without supply and data transmission systems. These sensors monitor important quantities during the system operation. In the course of the revision, the operator just scans the device under test, and by using wireless transmission the needed data are retrieved from all sensors. These data can be then compared with those from a previous system operation and all other data available. This paper presents the results of a vibrational mini-generator (MG) analysis. The MG is intended to provide power for the above sensors. The principle of its operation is based on the uti- lization of changes of the external mechanical forces, which can be described by Faraday's law (1,2). The required output parameters are: output voltage between 3{5V in the ideal case, output power 200{1000W. The value of output power depends on the type of the sensor used.