Preliminary Approach Designing an Electromagnetic Bearing for Flywheel Energy Systems

Preliminary Approach Designing an Electromagnetic Bearing for Flywheel Energy Systems

Abstract

Magnetic bearings are nowadays, an important technology that has been used in several high dynamic applications, as for instance, flywheels. Flywheels can be used as an energy storage system, in high range of applications such as low earth orbit satellites, pulse power transfer for hybrid electric vehicles, and many stationary applications. The main goal of this work is to design a magnetic bearing useful for a flywheel energy storage system.

The flywheel’s rotor, the component that storages the energy by means of its kinetic motion was designed in this study by calculating its dimensions, weight and material’s cost. A hybrid bearing was chosen to be used on the flywheel. The design and general characteristics of a hybrid bearing are presented in this thesis.

A hybrid bearing is composed of a passive and an active bearing. The passive bearing was designed to compensate gravitational and centrifugal forces. The active bearing was designed to compensate instabilities that the passive bearing could not compensate.

In addition of the design to the magnetic bearing components (passive bearing and active bearing), the proposed solution was developed taking into account the economic aspects, power and mechanical losses and cost.

Introduction

This chapter gives an overview of the work, establishing the work targets and goals. Also the scope and motivations are brought up. The current State-of-the-Art related to the scope of the work is also presented. At the end of the chapter, the structure of this work is referred and described.

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