Technical data

9-22 Notes Regarding Application Rexroth IndraDyn H
DOK-MOTOR*-MBS-H******-PR02-EN-P
The stator is light in weight and small in size. Therefore, it does not
achieve its final flexural strength until it has been built into the spindle
housing.
IndraDyn H motors have a stator-integrated cooling system. The cooling
lines are connected to the A side of the stator using two connectors
Further information for dimensioning and selecting a liquid cooling
system is provided in the documentation “Liquid cooling of Indramat
drive components”, MNR R911265836.
The spindle housing must be protected against corrosion with a suitable
corrosion-protection agent.
The power connection is brought out through the A-side of the stator.
There are also at least two PTC thermistors in the end winding which
monitor/measure the winding temperature through the control device.
The power leads and the PTC thermistors are guided together with flying
leads through a protective sleeve
The grounding connection must be executed according to the
information in chapter 8, “Connection Technique”.
When guiding the cable through the spindle housing, note the following:
• the bend radius of the cable must not be less than specified (see
chapter 8, “Connection Technique”), and
• the edges of the drill hole in the spindle housing must be rounded off.
9.11 Regenerative Power Uptake
If all motors of a drive package simultaneously enter braking mode (e.g.
when all the drives react to an error), it must be ensured that the total
regenerative power (motor moment of inertia plus the moment of inertia
of the load) can be converted into heat by the power supply or returned
to the power supply network.
CAUTION
Material damage due to overload of the braking
resistor and to extended braking times / paths!
⇒ Select the power supply device so that the sum of
the peak regenerative power of all the drives does
not exceed the peak braking resistor power of the
power supply device..
In the case of power supply devices that are incapable of regeneration or
ones that are capable of regeneration but whose control voltage could
fail during an error, the active braking resistor must be capable of taking
up the entire regenerated power of a fast braking action!
Especially in the case of motors of the IndraDyn H series, the power that
is regenerated during braking must be considered due to the high
maximum speeds; this power must be compared to the regenerative
power uptake of the power supply device/ converter that is used!
Cooling
Corrosion protection
Electrical connection
Calculation