MPH-02, MPB-02, MPD-02
Drive Control
6-69
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
1
(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
1
is reduced.
If the peak current is required for a longer period than t
1
, the value of
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
.
DK000061v01_en.fh7
t
max. peak current
P-0-4046
max. contin. current
t
1
t
2
0
S-0-0109
S-0-0110
S-0-0111
max. KB current
S-0-0111 * P-0-4037
1,15 * S-0-0111 * cooling type factor
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
1
:
max. duration after which the motor temperature model reduces
to the max. KB current
t
2
:
max. duration after which the motor temperature model reduces
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)
Features
Maximum Peak Current
Maximum Duration
for the Peak Current
Time Dependency of Effective
Peak Current
Courtesy
of
CMA/Flodyne/Hydradyne
▪
Motion
Control
▪
Hydraulic
▪
Pneumatic
▪
Electrical
▪
Mechanical
▪
(800)
426-5480
▪
www.cmafh.com
