Commutation Adjustment - Bosch Rexroth IndraDyn T Project Planning Manual

236/261 Bosch Rexroth AG | Electric Drives
Operating Torque Motors
12.7

Commutation Adjustment

DANGER
WARNING
and Controls
Fig.12-5: Rotor rotational direction in view of the cable output side on the stator
Malfunction due to errors in trigger motors and moving elements! Com‐
mutation adjustment must always be performed in the following cases:
⇒ Initial start-up
⇒ Modification of the mechanical attachment of the encoder system
⇒ Change the encoder system
⇒ Modification of the mechanical attachment of the stator and/or the rotor
Malfunction and/or uncontrolled motor movement due to error in com‐
mutation adjustment!
⇒ Effective direction motor torque = encoder system count direction
⇒ Adhering to the described setting procedures
⇒ Correct motor and encoder parameterization
⇒ Expedient parameter values must be assigned for current and velocity
control loop.
⇒ Correct connection of motor power cable
⇒ Protection against uncontrolled movements
Setting the correct commutation angle is a prerequisite for maximum and torque
development of the synchronous torque motor.
This procedure ensures that the angle between the current vector of the stator
and the flux vector of the rotor is always 90°. The motor supplies the maximum
torque in this state.
Rexroth IndraDyn T | Project Planning Manual