Emerson SP2404 - Menu 4 Regen Logic Diagram

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Unidrive SP Regen Installation Guide 101
Issue Number: 2 www.controltechniques.com
The Maximum current is either (1.75 x Rated drive current) when the rated current set by Pr 5.07 (or Pr 21.07 if motor map 2 is selected) is less
than or equal to the maximum Heavy Duty current rating, otherwise it is (1.1 x Maximum rated current).
The rated active and rated magnetising currents are calculated from regen mode rated current (Pr 5.07) as:
rated active current = regen mode rated current
rated magnetising current = 0
In this mode the drive only requires the regen mode rated current to set the maximum current limit correctly and scale the current limits, and so no
auto-tuning is required to set these accurately.
It is possible to set a level of reactive current with Pr 4.08 in regen mode. This parameter has a limit defined as REGEN_REACTIVE_MAX that is
provided to limit the total current to DRIVE_CURRENT_MAX.
Figure 9-3 Menu 4 Regen logic diagram
REGEN_REACTIVE_MAX
Rated drive current 1.75×
Regen unit rated current
-------------------------------------------------------------------------
2
Pr 4.07
2
– 100%×=
0.XX
0.XX
Key
Read-write (RW)
parameter
Read-only (RO)
parameter
Input
terminals
Output
terminals
X
X
X
X
The parameters are all shown at their default settings
2.014.01
2.014.17
2.014.02
2.014.20
Current
measurement
Current
magnitude
Reactive
current
Active
current
Percentage
load
4.15
4.16
Thermal
time
constant
Thermal
protection
mode
Overload detection
4.07
Symmetrical
current
limit
Current limits
2.014.19
Overload
accumulator
4.08
Reactive
current
reference
Real current
demand
from Menu 3
2.014.18
Overriding
current
limit
2.014.04
Current
demand
+
_
+
_
4.13
4.14
Current
controller
kp gain
Current
controller
ki gain
4.13
4.14
Current
controller
kp gain
Current
controller
ki gain
Modulator
and power
circuit