3-30 Installing the Drive
DC590+ DRV Series DC Digital Drive
AH385851U002, U003, U004, U005 (Frame 3)
(590+ - 4 Quad, 591+ - 2 Quad; Low and High Volt)
Power supplies for the controller are generated from the
single phase auxiliary supply via a switched mode power
supply. The incoming supply is directly rectified to provide
a high voltage dc power rail. A high voltage transistor
switches this rail on to the primary of a high frequency
transformer, the output of which is rectified and smoothed
to provide the dc power supply rails. The +5V dc rail is
monitored via a reference element and a control signal
returned via an opto-isolator to the control element of the
high voltage switching transistor. The ±15V dc rails are
generated via separate secondary windings which are
rectified, smoothed and stabilised by linear regulators. The
SMPS operates over an input voltage range of 110V to
240V ac ±10%, 50/60Hz. The auxiliary supply fuse FS1
provides protection of the high voltage elements.
Figure 3- 12 591 Power Board 2 Quad
(AH385851U003, U004)
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