higher internal delay inside the speed loop. This reduces the speed loop stability margin and consequently
the speed loop bandwidth.
The current loop gains are automatically calculated when the Calculate current loop gains command is
selected.
NOTE
If the drive supply voltage value is changed, the current loop gains are automatically adjusted accordingly, inside
the drive. A new calculation is not required.
Auto-phasing of the motor
The Auto-phasing procedure identifies the motor parameters Pole pairs, Phase order and Position sensor
offset.
- The Pole pairs parameter defines the number of motor pole pairs.
- The Phase order parameter defines the sequence of the motor phases.
- The Position sensor offset parameter defines the mechanical shift between the motor and the position sensor
(resolver or absolute encoder) reference.
Before executing the Auto-phasing procedure, proceed as follows:
- Check that the values of the Maximum current and Rated current parameters are compatible with the motor.
Otherwise, modify them according to the motor specifications.
- Select the I²t protection in fusing mode. The Fusing mode should be used for the commissioning phases.
- Uncouple the motor from the mechanical load and check that the motor shaft is free and for free rotation (1
revolution) that is not dangerous for the operator.
2.4.2.3 - Linear motor configuration
The Encoder resolution parameter is calculated as described below:
The motor Maximum speed parameter value in rpm is calculated according to following formula:
The linear speed value in m/s is calculated according to following formula:
The User position scaling is adjusted as described below:
User position scaling = motor displacement for 1 pole pitch = Motor pole pitch (mm)
N S N S N S
Motor magnets
Pole pitch
Motor pole pitch (mm)
Encoder signal pitch (μm)
Encoder resolution (inc) = 4000 x
!
1 encoder signal pitch = 4 counting increments
60
To Next Page
Loading...
Need help?
General
