Controllers
Parameter manual b maXX BM5800
Document No.: 5.16029.03 Baumüller Nürnberg GmbH
508
of 814
3.7
with: F
2 set
Slip frequency preset value in Hz (displayed in [Inc/Tab] in
parameter Z146.16–)
i
sq set
Torque current set value in A
Flux
set
Set value of the magnetic flux in % Z146.13–
Flux
nom
Nominal flux = 100%
I
sq nom
Motor nominal torque current in A Z19.10–
F
2 Tm act
Slip frequency at Motor nominal torque current and nominal
flux according to the temperature actual value, in Hz Z19.30–.
The slip frequency at the motor nominal torque current and nominal flux according to the
temperature actual value (
Z19.30–) is obtained from a temperature compensation char-
acteristic.
Temperature compensation characteristic
If the motor temperature increases, by constant torque current and magnetic flux, the slip
frequency rises.
The temperature compensation of the slip frequency is made roughly by means of a linear
characteristic using slip frequency/temperature support points at the warm as well as the
cold motor (
Z107.15– to Z107.18–). The actual slip frequency F
2 Tm act
accordant to the
motor temperature actual value (Z128.3–) is shown in the parameter Z19.30– and is
evaluated as follows:
with: F
2 Tm act
Slip frequency at nominal torque current and nominal flux
according to temperature actual value, Z19.30–
T
m act
Motor temperature actual value Z128.3–
F
2 cold
Slip frequency at nominal torque current and nominal flux
according to motor cold Z107.15–
F
2 warm
Slip frequency at nominal torque current and nominal flux
according to motor warm Z107.16–
T
m cold
Slip temperature motor cold Z107.17–
T
m warm
Slip temperature motor warm Z107.18–
The temperature compensation is made automatically if the motor temperature monitor-
ing is activated (Z128.2– bits 0 to 7). The following applies if the temperature monitoring
is deactivated:
F
2 Tm act
F
2 cold
T
m act
T
m cold
–
F
2 warm
F
2 cold
–
T
m warm
T
m cold
–
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+=
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