Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C Frame) - Classic Control - Manual (Page 390)

6-46 Component Definition and Maintenance
7000L-UM300I-EN-P – June 2013 7000 “C” Frame
Self-Powered Gate Driver
Board – SPGDB
Description
This board is used in drives where SCRs are used as the rectifying
device on the input of the drive. The SCRs require a gating pulse in
order to turn on, and this is achieved by using the SPGDB.
The SPGDB receives its command from the drive processor, via a
light signal, which is transmitted through a fiber optic cable. The
power source for the SPGDB is from the snubber network of the
SCR, a patent pending design of Rockwell Automation. This unique
design gives the SPGDB the ability to conserve the amount of energy
that it supplies to the SCR. This reduces the amount of energy
required by the drive to operate, thus making the drive more efficient.
Also, this board will determine the health of the SCR. It has the
hardware necessary to diagnose the condition of the SCR. This
status is relayed to the processor via a fail-safe light signal
transmitted through a fiber optic cable.
Board Calibration
No field calibration is required for this board.