الفهرس 
Scope of the workOnly 14 pages are availabe for public view
 |  | from | 93 |  |  |
| | | from | 93 | | |
Abstract
In this thesis, a surface-mounted permanent magnet synchronous
machine and flywheel are designed and optimized analytically. The
machine and flywheel are supposed to be used in low earth orbit
satellite as electromechanical battery. Due to the application, there is a
limited amount of space for the system which set constraints on the
design.
The low earth orbit satellites usually include nano and micro satellites
which rotate around the earth is a period of 90 minutes. the most critical
part of these satellites are their batteries which supply power to a load
of about 100 w during 30 minutes eclipse period .
The electromechanical battery is a motor generator mode device with
flywheel which is used to store kinetic energy during motor mode
through the flywheel during sunlight and supply electrical power from
the stored kinetic energy by the generator mode at eclipse period.
Among several types of machine, the permanent magnet synchronous
machine is chosen to be used in this battery with outer rotor to be
suitable for the flywheel system for space applications.
An analytical design method for surface mounted permanent magnet
machine is described. Special attention is given to the mechanical
properties of the machine to withstand high speed which has maximum
of a 60000 rpm. A selection of material for the each component of the
machine is considered.
The development of flywheel to be a hollow cylindrical body which is
composed of two parts to minimize the weight of the system and to
optimize its volume and guarantee the storage and supply of enough
kinetic energy.