Parameter Descriptions 2-75
7000-TD002A-EN-P – September 2007
Flux Control Parameters
Flux Reference [Flux Reference]
Linear Number: 305
Minimum Value: 0.000 pu
Maximum Value: 2.000 pu
Access Level: Advanced
Read/Write: Read Only
This parameter specifies the rotor flux reference, which varies between a minimum value set by
parameter FlxCmd No Load (103) and a maximum value set by parameter FlxCmd RatedLoad (100).
The flux reference varies directly with torque at all speeds, and decreases with speed above Base Speed.
The flux reference is also automatically reduced if the current regulator approaches advance limit or
retard limit, which can occur when running at high speed and high torque with low line voltage.
Flux Feedback [Flux Feedback]
Linear Number: 306
Minimum Value: 0.000 pu
Maximum Value: 2.000 pu
Access Level: Advanced
Read/Write: Read Only
This parameter displays the value of flux feedback which can come from either FlxFbk VoltModel (342) or
FlxFbk CurModel (341) or a combination of both. For Sensorless drives running below 3 Hz, flux from the
Current Model is used to calculate Flux Feedback and above 3Hz flux from the Voltage Model is used.
For drives with Pulse Tach, below 7.5 Hz flux from the Current Model is used while above 7.5Hz flux from
the Voltage Model is used to calculate Flux Feedback. Refer to section on Motor Model in Chapter 1.
Flux Error [Flux Error]
Linear Number: 307
Minimum Value: -2.000 pu
Maximum Value: 2.000 pu
Access Level: Advanced
Read/Write: Read Only
This parameter specifies the flux error obtained by subtracting the flux feedback from the flux reference.
Motor Flux Current Command [Mtr Flux CurCmd]
Linear Number: 310
Minimum Value: -2.000 pu
Maximum Value: 2.000 pu
Access Level: Advanced
Read/Write: Read Only
This parameter specifies the magnetizing or D-axis stator current command, which is the sum of a
feedforward term FluxCur Feedfwd (308) and the current from the flux regulator FluxCurRegulator (309).
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