Emerson Packaged Drives and Engineered Systems, Брошюра

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Unidrive SPMs
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: 2000
Basic Configurations
The examples below demonstrate the versatility of the Unidrive SPM in creating a wide range of High Power AC drives.
The SPMA solution will be lower cost but the SPMD solution
may give site standardization. The master control module
on the drive may be replaced by a follower module and the
master can be remotely mounted, as the application requires.
For higher currents multiple SPMAs or SPMDs may be
configured in parallel. The SPMA may give shorter installation
time with less interconnections but the SPMD may give lower
cost. Site standardization may also be a factor.
Active inputs for harmonic elimination
and regenerating excess energy can
be configured with standard drive
modules, configured as motoring or
regenerating.
Active Input and
Regeneration
Parallel Drives
Single Drives
Multi-pulse rectifiers can be
configured (12, 18 and 24 etc.),
to minimise input harmonics
and help to meet local supply
authority regulations.
12 Pulse Input
Current
Drives from the Unidrive and Commander families
can be connected on a common DC bus system,
in order to circulate energy between drives with
opposing energy flow, supplied from a controlled
rectifier input (SPMC), an active input (SPMA or
SPMD) or an existing DC source.
Common DC bus