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6-68
Drive Control
P-0-4045, Maximum possible
continuous current
P-0-4046, Effective peak current
Dynamic Peak Current Limitation
The maximum possible continuous current (P-0-4045) can be the 1.15-
fold value of the motor current at standstill. As a result, the motors
theoretically can be continuously operated with the 1.15-fold current at
standstill if the continuous current of the controller (power section) allows
it.
Note:
Overload protection in peak load and short-time operation
(KB = "Kurzzeitbetrieb") is realized by the temperature model
of the motor and additionally by the temperature sensor
included in the motor.
According to the thermal load of the motor or drive controller, the effective
peak current (P-0-4046) is subject to a dynamic current limitation. The
theoretical maximum value for P-0-4046 results from the minimum of
S-0-0109 and S-0-0110 (see fig. "Generating the maximum values for
continuous current and peak current").
In the case of dynamic peak current limitation, we distinguish 2 types due
to the influencing factors:
• Amplifier current limitation
Used to protect the drive controller. An amplifier temperature model
based on the amplifier type data is therefor stored in the controller.
Note:
The amplifier type data are determined at the factory and
stored in parameter P-0-4058 on the power section.
• Motor current limitation
Used to protect the motor in the case of peak load and short-time
overload operation. A motor temperature model based on the motor
current data is therefor stored in the controller.
P-0-0640,
Cooling type
P-0-4034,
Thermal time
constant winding
P-0-4035,
Thermal time
constant motor
P-0-4037,
Thermal short time
over load of windings
temperature
model
motor
P-0-0440,
temperature
Actual output
model
current value
(absol. value)
amplifier
S-0-0110,
Amplifier peak
current
S-0-0112,
Amplifier nom.
current
Fig. 6-46:
Generating the dynamic peak current limit value (temperature model)
MPH-02, MPB-02, MPD-02
S-0-0109,
Motor
peak current
S-0-0111,
Motor current
at standstill
I
motor
max
MIN
I
amplifier
max
stall current
P-0-4058,
limit from
Amplifier type
I-controller
data
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
P-0-4046,
Effective
peak current
DF000070v01_en.fh7
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