Johnson Controls VSD Series User Manual

VSD Series Drives User Manual Powered by Eaton Technology
15-18 For more information visit: www.johnsoncontrols.com LIT-1201828
November 2009
Table 15-4: Size-Dependent Switching Frequencies
605 Voltage at field weakening
point
Above the frequency at the field weakening point, the output voltage remains at the
set maximum value. Below the frequency at the field weakening point, the output
voltage depends on the setting of the V/Hz curve parameters. See ID109, ID108, ID606
and ID607.
When ID105 and ID106 (nominal voltage and nominal frequency of the motor) are set,
ID604 and ID605 are automatically set to the corresponding values. If you need
different values for the field weakening point and the maximum output voltage,
change these parameters after setting ID105 and ID106.
606 V/Hz curve, middle point
frequency
If the programmable V/Hz curve has been selected with ID108, this parameter defines
the middle point frequency of the curve. See Figure 15-15.
607 V/Hz curve, middle point
voltage
If the programmable V/Hz curve has been selected with the ID108, this parameter
defines the middle point voltage of the curve. See Figure 15-15.
608 Output voltage at zero speed
If the programmable V/Hz curve has been selected with the ID108, this parameter
defines the zero frequency voltage of the curve. See Figure 15-15.
609 Switching frequency
Motor noise can be minimized using a high switching frequency. Increasing the
switching frequency reduces the rating of the drive. The range of switching
frequencies is dependent upon the horsepower size of the drive:
Type Min. [kHz] Max. [kHz] Default [kHz]
230V: 1 – 20 hp
480V: 1-1/2 – 40 hp
1.0 16.0 3.6
230V: 25 – 40 hp
480V: 50 – 250 hp
1.0 10.0 3.6

Johnson Controls VSD Series Specifications

General

Brand	Johnson Controls
Model	VSD Series
Category	DC Drives
Language	English