Additional current demand input.
BIPOLAR CLAMPS 90 DISABLED / ENABLED
Selects between bipolar (asymmetric) or unipolar (symmetric) current clamps for the 4 quadrants of operation. Default setting of DISABLED means
UNIPOLAR clamps selected.
DISABLED - unipolar (symmetric)
ENABLED - bipolar (asymmetric)
With BIPOLAR CLAMPS disabled, the clamps are symmetrical and are set by POS. I CLAMP IN. With BIPOLAR CLAMPS enabled, the clamps
are assymmetrical, bipolar. In bipolar mode, POS. I CLAMP IN sets the maximum positive current and NEG. I CLAMP IN sets the maximum
negative current. Both clamps can be positive or negative, however, the POS I CLAMP IN value is internally prevented from going numerically
below the NEG I CLAMP IN. CUR. LIMIT/SCALER scales both POS. I CLAMP IN and NEG. I CLAMP IN.
REGEN ENABLE 201 See below
When REGEN ENABLE is 2Q (NON-REGEN), negative current demands are clamped to zero. Current feedback is subtracted from the current
demand and the result is controlled by the PI loop. The result provides SCR phase angle control.
2Q (NON-REGEN) - non-regenerative (2-quadrant)
4Q (REGEN) - regenerative (4-quadrant)
POS. I CLAMP IN 301 -200.00 to 200.00 %
Positive current clamp when BIPOLAR CLAMPS is ENABLED.
Negative current clamp when BIPOLAR CLAMPS is ENABLED.
Note on bipolar current clamps: these clamps in bipolar mode can cross-over onto the same quadrant. The POS. I CLAMP IN value is internally
prevented from going numerically below the NEG. I CLAMP IN.
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