Technical data

Rexroth IndraDyn H Notes Regarding Application 9-15
DOK-MOTOR*-MBS-H******-PR02-EN-P
• The temperature level of the coolant rises from one component to the
next. The power loss of each component raises the coolant
temperature, so the temperature of the machine is not the same
throughout the machine.
• Some components may not be cooled as required since the flow
quantity cannot be selected individually.
Combining series and parallel connections of the drive components that
are to be cooled permits the benefits of both connection types to be
used.
J
1
Q
1
SQ
J
0
J
2
Q
2
SQ
J
J
3
Q
3
Dp
J
4
Q
4
J
5
J
6
P
V1
P
V2
P
V3
P
V5
P
V4
P
V6
Fig. 9-24: Combination of series and parallel connection
9.7 Motor Temperature Monitor
CAUTION
Failure in the machine or damage by improper
use of the sensors!
⇒ The PTC-sensors are not safety devices and are
not suited for the integration in safety systems to
protect persons or machines.
⇒ The PTC-sensors are neither designed nor suitable
for determining the housing, rotor or bearing-
temperatures. Additional requirements for the
temperature monitor must be implemented by the
machine manufacturer.
⇒ The motor is protected from a thermal load only if
temperature sensor SNM.150.DK is connected to
the drive control device.
In their standard configuration, IndraDyn H motors are equipped with
built-in temperature sensors for motor protection. Every motor phase
contains of one of three series-connected, ceramic PTCs, which ensure
the safe thermal control of the motor in every operation phase. These
temperature sensors (referred to as motor protection temperature
sensors in the following) have a switching character (see Fig. 9-8) and
are monitored on all Bosch Rexroth drive control devices.
Furthermore, all stators are fitted with an additional temperature sensor
for temperature monitoring. These sensors (referred to as temperature
Combination of series and
parallel connection