Rockwell Automation 20G PowerFlex 750-Series AC Drives - Manual (Page 282)

282 Rockwell Automation Publication 750-RM002B-EN-P - September 2013
Chapter 5 Drive Features
Below is a spreadsheet example of data logged. Use a spreadsheet program
to open the *.csv file.
Energy Savings Setting the motor control mode P35 [Motor Ctrl Mode] to 2 “Induct Econ” or
Induction Economizer mode enables additional energy savings within the drive.
To be specific, additional energy savings can be realized in constant torque
applications that have constant speed reduced load periods.
Induction Economizer
Induction Economizer mode consists of the sensorless vector control with an
additional energy savings function. When steady state speed is achieved, the
economizer becomes active and automatically adjusts the drive output voltage
based on applied load. By matching output voltage to applied load, the motor
efficiency is optimized. Reduced load commands a reduction in motor flux
current.
To optimize the performance of the Induction Economizer mode, adjust the
following parameters:
• P47 [Econ At Ref Ki] - Integral gain that determines the response of the
output voltage when the output frequency is at reference.
• P48 [Econ AccDec Ki] - Integral gain that determines the response of the
output voltage when the output frequency is accelerating or decelerating to
the reference setpoint.
• P49 [Econ AccDec Kp] - Proportional gain that determines the response
of the output voltage when the output frequency is accelerating or
decelerating to the reference setpoint.