Parameter
structure
Keypad and
display
Parameter x.00
Parameter
description format
Advanced parameter
descriptions
Macros
Serial comms
protocol
Electronic
nameplate
Performance
RFC mode
Unidrive SP Advanced User Guide
413
Issue Number: 10 www.controltechniques.com
9.5 Current feedback
Accuracy: 5% worst case, 2% typical.
Resolution: 10 bit plus sign
Full scale resolution is equivalent to 222% drive rated current (OI.AC
trip level)
9.6 Bandwidth
The following bandwidth values are for 12kHz PWM switching
frequency:
9.6.1 Speed loop
The speed loop bandwidth is 160Hz
9.6.2 Current loop
The current loop bandwidth is 1100Hz for the 3dB point, and 400Hz for
the 45
°
point.
1. The gain characteristic and associated 3dB point is most useful
where drive is used in an application where the current controller is
not included within an outer control loop.
2. The phase characteristic and associated 45
°
point is most useful
where the current controller is used within an outer control loop such
as a speed controller. The phase delay of the current controller has a
limiting effect on the response of the outer loop.
Summary of Contents for unidrive sp
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