Bosch Rexroth IndraDrive MPH-02 Functional Description page 281

MPH-02, MPB-02, MPD-02
Features
Maximum Peak Current
Maximum Duration
for the Peak Current
Time Dependency of Effective
Peak Current
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
The basic features of dynamic current limitation:
• The value taking effect is always the lowest value resulting from motor
current or amplifier current limitation.
• The maximum possible continuous current is displayed in P-0-4045,
the effective peak current in P-0-4046.
• The current command value after limitation is displayed in parameter
P-0-0038.
If the drive controller was sufficiently dimensioned, the effective peak
current (P-0-4046) can as a maximum reach the peak current of the
motor (S-0-0109) because its value is the upper limit for the motor
temperature model.
The maximum possible peak current can be made available for the time t
(see fig. "Time response of the effective peak current") [e.g. a maximum
of 400 ms with switching frequency 4 kHz].
Note: According to load cycle or with higher switching frequency and
the thermal load involved, the time t
If the peak current is required for a longer period than t
P-0-4046, Effective peak current is reduced accordingly, at the very
most to the value preset in P-0-4045, Maximum possible continuous
current.
S-0-0110
S-0-0109
P-0-4046
1,15 * S-0-0111 * cooling type factor
S-0-0111
t
0
1
S-0-0109: motor peak current
S-0-0110: amplifier peak current
S-0-0111: motor current at standstill
P-0-4045: maximum possible continuous current
P-0-4046: effective peak current
t : max. duration after which the motor temperature model reduces
1
to the max. KB current
t : max. duration after which the motor temperature model reduces
2
to the max. continuous current
KB: short-time operation (KB = "Kurzzeitbetrieb")
c. type factor: depending on the cooling type and the resulting setting of
P-0-0640, Cooling type (see also Parameter Description):
1.0...for standard cooling (2AD, ADF, MAD, MAF, MBT, MBS,
LSF, MLF, non-ventilated MHD, MSK, MKD, MKE)
1.5...for ventilation (only MHD, MSK, MKD, MKE)
1.9...for liquid cooling (only MHD, MSK, MKD, MKE)
Fig. 6-47: Time response of the effective peak current
(at full motor load, if the motor temperature model is the effective
limitation)
is reduced.
1
S-0-0111 * P-0-4037
t
2
6-69
Drive Control
1
, the value of
1
max. peak current
max. KB current
max. contin. current
t
DK000061v01_en.fh7