KEPCO BOP 500M, Руководство оператора

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BOPHV020411
3-11
FIGURE 3-10. BOP D-C OUTPUT VOLTAGE CONTROL WITH A HIGH IMPEDANCE, (±) 1V SIGNAL SOURCE
As seen in FIG. 3-10, the original input feedback components of the E
O
PRE-AMP have been
bypassed and are replaced by external resistors (small metal film or wirewound type resistors
may be used and connected directly to the REAR PROGRAMMING CONNECTOR terminals as
shown). The E
O
PRE-AMP is used in the non-inverting configuration. Its output voltage (the
necessary BOP control voltage) is given by
Consequently, as the BIPOLAR INPUT VOLTAGE (Ei) is controlled from (–) 1V over zero to (+)
1V, the BOP output voltage will follow over its specified range from +E
Omax
to –E
Omax
. Calibra-
tion of the system can be performed at the programming source, or the E
O
PRE-AMP zeroing
control can be used for the low end, while the feedback resistor (Rf = 18k) can be trimmed to
calibrate the high end of the range.
3.3.3 THE BOP AS AN AMPLIFIER
If, instead of the previously used d-c control signal, an a-c signal voltage is applied to the E
O
(PROGRAM) INPUT, the BOP functions as a bipolar amplifier. As an amplifier, the BOP has a
voltage gain of 50 (BOP 500M) and 100 (BOP 1000M) respectively, so that (as before with the
d-c control signal) a bipolar a-c input signal with an amplitude of 20V (peak to peak) will drive
the BOP output through its specified (±) output voltage range. All other dynamic specifications
are given in Section 1, Table 1-3.
The BOP can be used to amplify, sum or scale a variety of waveshapes, some of which are illus-
trated in FIG. 3-11. All input signals are shown in phase with their corresponding output wave-
shapes. The latter can be readily produced 180° out of phase (i.e. with the output wave taking
EO (PRE-AMP) = Ei
Rf + Ri
Ri
------------------ = (±) 1V 18K + 2K
2K
------------------------ = (±) 10V