PG Drives Technology VR2 series, Operation And Installation Manual

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PG
DRIVES TECHNOLOGY
73
C
HAPTER
3 - P
ROGRAMMING
SK77898/2
Current Limit Max
Current Limit Min 70 Amps
VR2 70
60 Amps
Current Foldback Temp.
80 C
50 Amps
VR2 50
20 Amps
80 C
40 Amps
VR2 40
20 Amps
80 C
60 Amps
VR2 60
40 Amps
80 C
3 - Current Foldback Temp.
This parameter sets the temperature within the control system at which the
current starts to reduce linearly.
8.2 Motor Compensation
This matches the VR2 to suit different motor types in order to achieve optimal
performance and drive control. This value should be set in accordance with the
armature resistance of the motor and all cables and connectors between the VR2
and the motor. The value is set in milli-Ohms (m W ). A recommended value is:
•
70% of the (armature resi cables and connectors)
Motor manufacturers should be able to supply figures for armature resistance and
cable and connectors may typically be 40m W .
Example: Motor has armature resistance of 200m W
Cables and connectors are 40m W
Set Motor Compensation to 0.7 x (200 + 40) = 170m W
Never exceed the 70% relationship described above.
It is important that the maximum values in the table shown below are not exceeded
for the VR2 model you are working with.
VR2 CURRENT/TEMPERATURE RELATIONSHIP
1
2
3
Current
Temperature
80 C
The values in the table above should never be exceeded.
Doing so will invalidate the warranty and affect the long
term reliability of the control system.