For the maximum frequency, set the highest frequency at which control is performed on the inverter.
Note that this must be within the maximum frequency of the motor.
0
Rated Voltage at Base
Frequency (F05/A03)
Rated Voltage at Maximum
Output Frequency (F06/A04)
Base Frequency
(F04/A02)
Maximum Output
Frequency (F03/A01)
Output frequency [Hz]
Output voltage [V]
Reducing Torque Characteristics (F37/A13 = 0)
This setting is suitable for fan, pump, and other applications that do not require large torque at low
speeds.
It provides high efficiency, reduced noise and vibration as the output voltage is reduced in the low
speed range.
By using the non-linear V/f function, a suf
ficient startup torque can also be secured as constant torque
characteristics up to specified speeds.
0
1st Rated Voltage at
Base Frequency (F05)
Non-linear V/f Voltage 1
(E167)
Non-linear V/f
Frequency 1 (E166)
1st Base Frequency
(F04)
Output frequency [Hz]
Output voltage [V]
Reducing torque characteristics using non-linear V/f
Reducing torque characteristics are characteristics to the power of two.
Broken Line V/f Function
• With the non-linear V/f function, V/f characteristics at a total of nine points can be configured as de-
sired by setting the voltage and frequency of seven points in addition to base voltage/frequency and
maximum voltage/frequency. When the non-linear V/f function is not used, set “0.0” to the non-linear
V/f frequency 1 to 7 that is not to be used.
• Frequency is not in parameter No. order but in order of the size of the set value. (Refer to the figure
below.)
• The non-linear V/f function can be jointly used with torque boost, reducing torque characteristics and
automatic energy saving operation.
5 Basic Settings
5-11
M1 Series Standard Type User's Manual (I669)
5-2 Setting V/f Control
5
5-2-1 Motor Control Method (V/f Characteristics)
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