Yaskawa G5 OV Suppression - Manual

OV Suppression
Date: 07/01/04, Rev: 04-07 Page 1 of 8 TM.G5SW.017
GPD515/G5 Software Option (VSG114701)
Part Number: CIMR-G5MXXXXXF-017
(1)
A Yaskawa GPD515/G5 inverter with this
software can control rotating loads where
the motor is overhauled by stored energy
during part of the machine’s cycle. The
following example illustrates the type of
application that will require this software.
Example Application
This example demonstrates two ways that the
motor may be forced into regeneration. The first
is when the cam clutch is not engaged. The
motor can accelerate and drive the flywheel.
There is no problem until the speed of the motor
is reduced. The inertia from the flywheel will
overhaul the motor forcing regeneration into the
GPD515/G5. The second is when the cam
clutch is engaged. The motor in the example
will drive the flywheel for one-half of a revolution
compressing the springs. After the highest point
of the cam moves past the center of the cam
follower the springs will begin to release their
energy into the flywheel for the next half of a
revolution. This can overhaul the motor forcing
regeneration into the GPD515/G5.
This software monitors and regulates the DC
bus voltage by making adjustments to the
deceleration rate and accelerating the motor to
control regeneration. During periods when the
speed has been reduced the deceleration rate is
controlled. When the speed reference is
constant and regeneration is detected the drive
accelerates the motor to remove the condition.
The necessary parameters are provided to
enable control and limit these features.
This software does not support ramp to stop. It
defaults to coast to stop.
This document is an addendum to Technical
Manual TM 4515. It contains the effect of this
software on the parameters in the drive and
function descriptions in the manual.
This software can be setup to operate in 230 –
575 VAC GPD515/G5 units. The default
settings are for 480 VAC units.
(1)
ZZZZ refers to the base Model Number
of drive to be flashed with the software.
Motor /
Gear Box
Yaskawa
GPD515/G5
With
G114701
FLYWHEEL
Clutched
Cam