ID 442426.04
244
WE KEEP THINGS MOVING
Holding brake
11
Manual SD6
In the first step calculate the ratio of torques V
M
as a percentage:
If V
M
> 200 %, restrict V
M
= 200 %.
In the next step, determine the current associated with M
Bstat
:
Compare I
0Bstat
with I
N
of the drive controller:
1. If I
0Bstat
≤
2 * I
N
:
B304[0]
= V
M
,
B305[0]
= -V
M
2. If I
0Bstat
> 2 * I
N
:
V
M2
= 100 * 2 * I
N
/I
0
;
B304[0]
= V
M2
,
B305[0]
= -V
M2
Example
•
M
Bstat
= 10 Nm
•
M
0
= 6.6 Nm
•
I
0
= 4.43 A
•
I
N
= 6 A
Result:
B304[0]
= 151 %,
B305[0]
= -151 %
11.9.1.2
Asynchronous motor
Calculate the torques that must be entered in
B304[0]
and
B305[0]
for the
brake test according to the following instructions:
The following values will be required:
•
M
B
holding torque of the brake
•
M
N
nominal torque of the motor
•
M
K
/M
N
ratio of tilting torque to nominal torque
•
I
N
nominal current of the drive controller
•
E171 Id,nom
•
E172 Iq,nom
Note that you can only obtain the correct values from
E171
and
E172
in the
following manner: Perform complete projecting for the motor, transfer the
project to the drive controller, save the project and then read the values from
E171
and
E172
in online mode.
In the first step calculate the ratio of torques V
M
as a percentage:
If V
M
> 200 %, restrict V
M
= 200 %.
If M
K
/M
N
< 2, restrict V
M
= M
K
/M
N
* 100 %.
In the next step, determine the current associated with M
B
:
Compare I
0Bstat
with I
N
of the drive controller:
V
M
M
Bstat
M
0
-----------------
100
=
I
0Bstat
I
0
V
M
=
V
M
10Nm
6 6Nm
-------------------
100
151%
=
=
I
0Bstat
4 43A
151%
6 69A
=
=
I
0Bstat
6 69A
2 I
N
12A
=
=
V
M
M
B
M
0
--------
100%
=
I
0B
E171
2
V
M
E172
2
+
=
