Power Limitation; Figure 40: Power Limitation Structure - Moog RKP-D User Manual

7 Pump functions
Leakage compensation
Detailed information on the leakage compensation:
Chapter "7.2.4.1 Leakage compensation", page 82
Suck limitation
Detailed information on the suck limitation:
Chapter "7.2.6.2.7 Object 0x2317: Suck limitation", page 91
7.2.7.1.1 Object 0x2158: Controller output
ValveMainStageControl
Index Subindex
0x2158 0

7.2.8 Power limitation

The maximum flow of the pump can be limited by means of the power limitation function. The limit value, i.e.,
the maximum power is written to the parameter <Power_Maximum> (0x2600). If this power limit is reached,
the position demand is reduced.
Figure 34, page 81
The following figure shows the structure of the power limitation function and the parameters influencing this
behavior.
<Power_Maximum>
(0x2600)
<ActualValue>
(0x6301)
<ActualValue>
(0x6381)
Enabling of the power limitation function
The power limitation function is switched on and off with the bit 11 in the control word. If bit 11 is set to true,
power limitation is enabled.
Chapter "5.3.1 Object 0x6040: Control word", page 27
PT1
The additional low pass filter of the power difference allows a delayed controller takeover from position to
power control. Hence, the limiting of the position is delayed by the low pass. This allows the pump to exceed
the power limit for a short time period depending on the time constant of the low pass element.
© Moog GmbH
Name
ControllerOutput
PT1
-
<Power_Value>
(0x2608)

Figure 40: Power limitation structure

USER MANUAL Firmware RKP-D (B99224-DV007-CE400; Version 1.1, 09/08)
Data type Access
INT16 ro
<Power_PT1gain>
(0x2602)
<Power_PT1TimeConstant>
(0x2603)
<Power_ProportionalGain>
(0x2601)
<Power_DifferentialTime
Contstant>
(0x2606)
Persis-
tence Value range
N INT16
<Power_PT1Shift>
(0x2604)
out
-
in
0
+
<Power_DifferentialGain>
(0x2605)
Controller
Default
None
+
-
95