Five-Phase Brushless DC-Machine Direct Drive System | Electrical Seminar Topic
Five-Phase Brushless DC-Machine Direct Drive System
The majority of electrical drive systems are three-phase
systems. Recently some quasi-four-phase systems employing neutral leg also have
been used for harmonic optimization and fault-tolerant drives. Three-phase
drive systems have been widely used for years because of the availability of
such machines, their inverters, modeling and control.
However, polyphase schemes
have been used in the past in drive systems where an induction machine with
asymmetric windings has three-phase sets advanced by 30 degrees for twelve-step
industrial applications. Such multiphase drives are likely to be limited to
specialized applications where high perfor- mance and reliability are required
(such as EV, HEV, aerospace, ship propulsion and high power applications) and
when cost requirements are not so oppressive when compared to the overall
environment.
The recent literature indicates several advantages for using
a mul- tiphase multi-pole electrical machine in hub-wheel systems – high-torque
low-speed motors can directly drive systems, avoi- ding mechanical losses
incurred by the clutch, reduction and differential gear during power transmission
from the motor to the wheels.
This work presents the design, analysis,
simulation, modeling and control implementation of a high-torque, low- speed,
multiphase, permanent magnet, brushless dc-machine. The paper focuses on issues
regarding the high-level modeling, comprised of a transient model, in
conjunction with correspond- ing experimental evaluation.
Analyses were made to
put together the modeling efforts with the expected behavior in order to have
realistic simulation results verified by the experimental setup; comprehensive
experimental results corroborate the work.
