9000X AF Drives User Manual
MN04001004E
For more information visit: www.eaton.com A-1
June 2009
Appendix A — Technical Data
General
Figure A-1 shows a block diagram of the SVX9000/SPX9000 drive. The SVX9000/SPX9000
physically consists of two sections, the Power Unit and the Control Unit. The three-phase
AC Choke with the DC-Link Capacitor form a LC filter which together with the Rectifier
produce the DC voltage for the IGBT Inverter block. The AC Choke smooths the disturbances
from the utility into the SVX9000/SPX9000 as well as the high frequency disturbances caused
by the SVX9000/SPX9000 on the utility line. It also improves the input current waveform to
the SVX9000/SPX9000. The IGBT Inverter produces a symmetrical three-phase pulse width
modulated adjustable frequency AC voltage to the motor.
The Motor and Application Control block contains a microprocessor with customized
software. The microprocessor controls the motor based on Measured Signals, parameter
value settings and commands from the Control I/O Block and the Control Module. The Motor
and Application Control block commands the Motor Control ASIC which calculates the IGBT
switching positions. Gate Drivers amplify these signals for driving the IGBT Inverter.
The Control Keypad is a link between the user and the SVX9000/SPX9000. With the Control
Keypad the user can set parameter values, read status information and issue control
commands. The Control Keypad is removable and can be mounted externally and connected
with the appropriate cable. Instead of the Control Keypad, a PC can be used to control the
SVX9000/SPX9000 by cable connecting it where the Control Keypad is normally connected or
through an option board.
The Control I/O Block is isolated from line potential and may be connected to or isolated
from ground by the choice of the control I/O board which is used. OPTA8 is isolated ground,
OPTA1 and OPTA9 are not.
Input and Output EMC-Filters are not required for the functionality of the SVX9000/SPX9000.
They are only needed for compliance with the EU EMC directive as detailed in the following
section.
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