Rockwell Automation 20D PowerFlex 700S Drive Ph I Control, Frames 1...11 - Manual (Page 213)

Application Notes C-3
This type of speed regulator produces a high bandwidth response to speed
command and load changes. In field oriented control the flux and torque
producing currents are independently controlled. Therefore, you can send a
torque reference directly instead of a speed reference. The independent flux
control also allows you to reduce the flux in order to run above base motor
speed.
Permanent Magnet Control
Permanent magnet control is used with permanent magnet motors.
Permanent magnet motor control is selected by setting parameter 485
[Motor Ctrl Mode] = 2 "Pmag Motor".
• Permanent magnet motor control requires either a hi-resolution
Stegmann encoder or compatible resolver feedback on the motor. Refer
to
PowerFlex 700S Stegmann Hi-Resolution Encoder Feedback
Option on page E-1 for a list of compatible hi-resolution Stegmann
encoders and compatible resolvers.
• Motor data and an autotune is required for correct operation in this
mode. Refer to PowerFlex 700S Permanent Magnet Motor
Specifications on page I-1 for a list of compatible Allen-Bradley
permanent magnet motors and motor data to be used with the PowerFlex
700S.
Motor Overload Mtr I2T Spd Min
Sets the minimum speed for the motor overload (I
2
T) function. The value
indicates minimum speed below the minimum current threshold [Mtr I2T
Curr Min], and these are the first current/speed breakpoint. From this point
the current threshold is linear to the value specified by the motor service
factor [Service Factor].
Adaptive
Controller
High Bandwidth Current Regulator
SPEED REF.
TORQUE REF.
SLIP
SPEED FEEDBACK
CURRENT FEEDBACK
AUTOTUNE PARAMETERS
V mag
V ang
Current
Reg.
Speed
Reg.
Flux
Reg.
Voltage
Control
Inverter Motor
Encoder