The motor has been correctly dimensioned, if the difference between amplifi‐
er temperature read from the parameter and ambient temperature remains at
less than 60 K in operation.
See also "S-0-0384, Amplifier temperature".
7.2.5
Switching frequency
The nominal values refer to a switching frequency of 4 kHz. Operation with
8 kHz is possible, but should be avoided where possible. Continuous torque
and peak torque are considerably reduced at 8 kHz and the higher basic los‐
ses cause higher motor temperature rise already in no-load operation.
See also "P-0-0001, Switching frequency of the power output stage".
7.3
Notes on mechanical project planning
7.3.1
Mounting clearance
The mounting clearance has to comply with both mechanical and thermal re‐
quirements. The mechanical requirements are complied with by taking the di‐
mensions of the components and their attached constructions (e.g. cables)
into account. Observe the minimum mounting clearances (dimensions) speci‐
fied in the dimensional drawings.
To comply with the thermal requirements, it has to be possible to dissipate
the power dissipation generated in the mounting clearance (e.g. control cabi‐
net) while the (local) ambient temperature does not exceed the allowed ambi‐
ent temperature T
a_work
.
KCU ventilation
Take the air intake and air outlet into account for ventilation.
Observe the data d
top
, d
bot
and d
hor
in the data sheet of KCU.
KSM, KMS mounting clearance
Make sure there is sufficient heat dissipation (e.g., ventilation, surface) in the
mounting clearance, particularly in the case of "closed" mounting situations.
Make sure that the cooling air can freely circulate around the housing surface
to avoid pockets of heat. Keep the housing surface which has a cooling effect
free from insulating dirt.
7.3.2
Output shaft
Plain shaft
The recommended standard design provides a friction-locked shaft-hub con‐
nection without backlash and excellent running smoothness. Use clamping
sets, clamping sleeves or clamping elements to couple the machine elements
to be driven.
Output shaft with key
The optional key according to DIN 6885, sheet 1, edition 08‑1968, permits
keyed transmission of torques with constant direction, with low requirements
to the shaft-hub connection.
DOK-INDRV*-KCU02+KSM02-PR03-EN-P
Bosch Rexroth AG
225/337
Rexroth IndraDrive Mi Drive Systems with KCU02 KSM02, KMS02/03, KMV03, KNK03
Notes on project planning
LSA Control S.L. www.lsa-control.com [email protected] (+34) 960 62 43 01