2-68 Parameter Descriptions
7000-TD002A-EN-P – September 2007
Current Control Parameters
DC Current Reference [Idc Reference]
Linear Number: 321
Minimum Value: 0.000 pu
Maximum Value: 4.000 pu
Access Level: Advanced
Read/Write: Read Only
This parameter is the dc link current reference.
DC Current Feedback [Idc Feedback]
Linear Number: 322
Minimum Value: -2.000 pu
Maximum Value: 4.000 pu
Access Level: Advanced
Read/Write: Read Only
This parameter is the measured dc link current feedback.
DC Current Error [Idc Error]
Linear Number: 323
Minimum Value: -1.000 pu
Maximum Value: 1.000 pu
Access Level: Advanced
Read/Write: Read Only
This parameter is the dc current error obtained by subtracting the dc current feedback from the dc current
reference.
DC Voltage Reference [Vdc Reference]
Linear Number: 326
Minimum Value: -1.000
Maximum Value: 1.000
Access Level: Advanced
Read/Write: Read Only
This parameter is the dc voltage reference, which is the output of the current regulator after the advance
limit and retard limit have been applied. A value of 1.000 corresponds to maximum positive voltage
(motoring) and a value of –1.000 corresponds to maximum negative voltage (regenerating) regardless of
the direction of motor rotation.
Alpha Rectifier [Alpha Rectifier]
Linear Number: 327
Minimum Value: 0.0 deg
Maximum Value: 180.0 deg
Access Level: Advanced
Read/Write: Read Only
This parameter specifies the rectifier firing angle relative to the input line voltage. It is equal to the inverse
cosine of the dc voltage reference, Vdc Reference (326). It is in the range 0 to 90 degrees for motoring
and 90 to 180 degrees for regenerating.
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