Rockwell Automation SA3100 AutoMax Distributed Power System - Manual (Page 29)

Overview of the AutoMax Distributed Power System 2-9
2.4 AC Drive Hardware Components
There are three different types of Power Module Interface hardware configurations
depending upon the type of AC Power Modules being used. These configurations are
described in the following sections.
2.4.1 SA500 Drives (14-48 Amp)
The hardware components of the SA500 drive consist of the DC Bus Supply and the
AC Power Module which contains the PMI. These components are shown in figure 1.2
and are described in the following sections. The same hardware is used for vector or
brushless control. The control type is determined by the programmer.
2.4.1.1 DC Bus Supply
The SA500 DC Bus Supply rectifies three-phase AC supply voltage to a constant DC
bus voltage. The DC Bus Supply shown in figure 2.4 can supply DC power to as many
as six AC Power Modules. The DC Bus Supply requires no adjustments and has
built-in diagnostics. Bus supplies use either internal or external braking resistors to
control the bus voltage during motor regeneration.
2.4.1.2 SA500 Power Module
The SA500 Power Module provides control and power for either permanent magnet
motors or squirrel-cage induction motors. It contains transistors to switch power to the
motor and also supplies power to the PMI regulator board. The PMI combines the
functions of the PMI Processor module and Resolver & Drive I/O module from the PMI
rack as described in section 2.3.1 with the exception that no analog meter ports are
provided. See figure 2.4.