Delta Electronics AC Motor Drive VFD-EL - Manual (Page 75)

Chapter 4 Parameters|
4-32 Revision August 2008, 2ELE, V1.02
This parameter sets the Mid-Point Voltage of any V/f curve. With this setting, the V/f ratio
between Minimum Frequency and Mid-Point Frequency can be determined. This parameter
must be equal to or greater than Minimum Output Voltage (Pr.01.06) and equal to or less than
Maximum Output Voltage (Pr.01.02).
01.05 Minimum Output Frequency (Fmin) Unit: 0.01
Settings 0.10 to 600.0Hz Factory Setting: 1.50
This parameter sets the Minimum Output Frequency of the AC motor drive. This parameter
must be equal to or less than Mid-Point Frequency (Pr.01.03).
01.06 Minimum Output Voltage (Vmin) Unit: 0.1
Settings 115V/230V series 0.1 to 255.0V Factory Setting: 10.0
460V series 0.1 to 510.0V Factory Setting: 20.0
This parameter sets the Minimum Output Voltage of the AC motor drive. This parameter must
be equal to or less than Mid-Point Voltage (Pr.01.04).
The settings of Pr.01.01 to Pr.01.06 have to meet the condition of Pr.01.02 ≥ Pr.01.04 ≥
Pr.01.06 and Pr.01.01 ≥ Pr.01.03 ≥ Pr.01.05.
01.07 Output Frequency Upper Limit Unit: 0.1
Settings 0.1 to 120.0% Factory Setting: 110.0
This parameter must be equal to or greater than the Output Frequency Lower Limit (Pr.01.08).
The Maximum Output Frequency (Pr.01.00) is regarded as 100%.
Output Frequency Upper Limit value = (Pr.01.00 * Pr.01.07)/100.
01.05 01.03 01.01
01.06
01.04
01.02
01.00
01.07 01.08
V/f Curve
Voltage
Frequency
Output Frequency
Lower Limit Output Frequency
Upper Limit
The limit of
Output
Frequency
Mid-point
Freq. Maximum
Output
Frequency
Maximum
Output
Voltage
Mid-point
Voltage
Minimum
Output
Voltage
Minimum
Output
Freq. Maximum Voltage
Frequency
(Base Frequency)