0
Rated Voltage at Base Frequency
(3004Hex-06Hex/3009Hex-04Hex)
Rated Voltage at Maximum Output Frequency
(3004Hex-07Hex/3009Hex-05Hex)
Base Frequency
(3004Hex-05Hex/
3009Hex-03Hex)
Maximum Output Frequency
(3004Hex-04Hex/
3009Hex-02Hex)
Output frequency [Hz]
Output voltage [V]
Reducing Torque Characteristics (3004Hex-26Hex/3009Hex-0EHex
= 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 sufficient startup torque can also be secured as constant torque
characteristics up to specified speeds.
0
1st Rated Voltage at
Base Frequency
(3004Hex-06Hex)
Non-linear V/f Voltage 1
(301FHex-44Hex)
Non-linear V/f
Frequency 1
(301FHex-43Hex)
1st Base Frequency
(3004Hex-05Hex)
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.
6 Basic Settings
6-9
M1 Series EtherCAT Type User’s Manual (I670)
6-2 Setting V/f Control
6
6-2-1 Motor Control Method (V/f Characteristics)
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