Ransburg LEPS5001 Power Supply for LECU5003 - Manual (Page 16)

OPERATION
THEORY OF OPERATION
-REFER TO FIGURE 3
0 to 120 VAC input is supplied to terminals TB2-
4 and TB2-5 of the LEPS5001 Power Supply
from the LECU5003 Control Panel. Inside the
LEPS5001 Power Supply, this 0 to 120 VAC
signal is supplied to the primary of high voltage
transformer 2T. In operation, alternate halves
of transformer 2T’s high voltage secondary AC
waveform charge capacitors C1 and C2 to the
peak voltage of the secondary output. Since
the capacitors are connected in series, the pow-
er supply output voltage is nearly twice the peak
voltage from the transformer, in this full-wave
voltage doubler circuit.
High voltage from the doubler circuit is connect-
ed to an output series resistor (R3) as protec-
tion against output transients. A current feed-
back signal is supplied to the control panel from
the cathode of 1REC and voltage feedback
signal is supplied through R2.
Zener diodes 1DZ and 2DZ serve as voltage
limiting devices in the event that the kV or cur-
rent feedback wires (31 or 34) become acciden-
tally disconnected from the LECU5003 Control
Panel.
LEPS5001 Power Supply - Operation
13
Ransburg
CP-95-02.5