Rockwell Automation SP600 AC Drive User Manual Version 1.0 - Manual (Page 142)

12-12 SP600 AC Drive User Manual
Specifies the method of motor torque production.
0 = Sensrls Vect maintains consistent magnetizing current up to
base speed, and voltage increases as a function of frequency and
load.
1 = SV Economize enables an energy-saving function that allows
the drive to automatically adjust output voltage as the load changes.
By adjusting the output voltage, the flux-producing current is
reduced, but only if the total drive output current does not exceed
75% of motor rated current. In this mode, the flux current is not
allowed to be less than 50% of the selected flux current parameter
value. This is done so that minimum current is supplied to the motor
thereby optimizing its efficiency.
2 = Custom V/Hz allows for tailoring the volts/hertz curve by
adjusting Maximum Voltage (54), Maximum Freq (55), Run Boost
(70), Break Voltage (71), and Break Frequency (72). Refer to figure
12.2.
3 = Fan/Pmp V/Hz sets a fan load volts per hertz curve profile
exponential to base frequency and linear from base to maximum
frequency. At low speed, the fan curve can be offset by the Run
Boost parameter (70) to provide necessary starting torque. Refer to
figure 12.3.
53 Torque Perf Mode
Range: 0 = Sensrls Vect
1 = SV Economize
2 = Custom V/Hz
3 = Fan/Pmp V/Hz
Default: 0 = Sensrls Vect
Access: 2 Path: Motor Control>Torq Attributes
See also: 62, 63, 69, 70
Figure 12.2 – Custom V/Hz Curve
Maximum Voltage
Maximum
Frequency
Base Voltage
(Nameplate) Voltage
Base Frequency
(Nameplate)
Break
Frequency
Run Boost
Start/Accel Boost
Break Voltage