Technical data

Rexroth IndraDyn H Notes Regarding Application 9-23
DOK-MOTOR*-MBS-H******-PR02-EN-P
Note: If necessary and if possible, an additional braking resistor
should be used!
You can find notes regarding calculation of the regenerative
power as well as the relevant data of the power supply
devices / converters in the documentation for the
corresponding Rexroth IndraDrive device, such as
• DOK-INDRV*-HMV-*******, MNR R911299229
• DOK-INDRV*-HCS02.1****, MNR R911306138
9.12 External Components
Motor Encoders
A motor encoder is required for monitoring the position and the velocity
of the motor. Particularly high requirements are placed upon the motor
encoder and its mechanical connection.
Note: The motor encoder does not belong to the scope of delivery
of IndraDyn H motors. The selection of suitable motor
encoders must be made by the machine manufacturer and
depends on the required application or machine.
For further questions about selection, technical clearance and
the compatibility of the motor encoder to Rexroth drive-
devices our sales and service facilities (see chapter 13) are
available.
To avoid having to go through an autocommutation process each time a
synchronous motor switches from parameter mode to operating mode,
we typically recommend absolute-encoder systems.
The attainable precision of IndraDyn H motors depends mainly on the
mechanical rigidity of the system as a whole.
Taking into account the desired precision, pay attention to the following
additional points when selecting the motor encoder:
• speed range of the motor
• speed range of the encoder
• encoder resolution
• compatibility to the control device
Measuring principles
The advantages of an absolute encoder system include:
• high availability of the axis of motion and
• high reliability of the axis of motion
Further advantages are:
• Monitoring and diagnosis functions of the electronic drive system are
possible without any additional wiring
Selection
Absolute encoder