Siemens 1FW6092-2PC15-6AB3, Руководство по настройке

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Motor components and options
4.1 Motor components
1FW6 High Speed built-in torque motors
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Configuration Manual, 01/2020, 6SN1197-0AE03-0BP3
To dissipate the kinetic energy of the rotating mass before it comes into contact with the
damping elements, the following measures should be taken to support mechanical braking
systems:
1.
Electrical braking using the energy in the DC link:
Please refer to the documentation of the drive system being used!
2. Electrical braking using armature short-circuit of the stator:
Please refer to the documentation of the drive system being used!
Disadvantage:
The braking torque depends on the speed and may not be sufficient to
bring the rotating masses to a standstill.
Note
If armature short-circuit braking is used, special contactors are required because the
currents can be very high. – The release timing for the drive system must be taken into
account.
3. Mechanical braking via braking elements:
The braking capacity must be dimensioned as highly as possible so that the rotating
masses can be reliably braked at maximum kinetic energy.
Disadvantage:
Depending on the speed, the relatively long response time of the brake
controller may mean that the rotating mass continues to rotate for some time without
being braked.
We recommend that all three measures be implemented together. Measures (2) and (3) are
used as an additional protection here in case measure (1) fails: The short-circuiting of the
stator works at high speeds to begin with and then the mechanical brake takes effect at
lower speeds.
A list of recommended braking element manufacturers is provided in the appendix.
Deploying a holding brake
Due to cogging torques, torque motors can be pulled into a preferable magnetic operating
position if the motor is no longer supplied with power from the drive. If the drive is already at
a standstill, this can cause unexpected movements in up to a half magnetic pole pitch in both
directions. To prevent possible damage to the workpiece and/or tool, it may be advisable to
use a holding brake.
WARNING
Uncontrolled rotation for inclined and horizontal axes
Torque motors are not self clamping. For inclined and horizontal axes in the no current
state, if the center of gravity lies outside the axis of rotation and there is no weight
equalization, then load can move downwards in an uncontrolled fashion. This can result in
injury and material damage.
•
Use a holding brake for inclined and horizontal axes that are not equipped with weight
equalization.