5-21
F04
F05
F06
H50, H51
H52, H53
Base Frequency 1
Rated Voltage at Base Frequency 1
Maximum Output Voltage 1
Non-linear V/f Pattern 1 (Frequency and Voltage)
Non-linear V/f Pattern 2 (Frequency and Voltage)
These function codes specify the base frequency and the voltage at the base frequency
essentially required for running the motor properly. If combined with the related function codes
H50 through H53, these function codes may profile the non-linear V/f pattern by specifying
increase or decrease in voltage at any point on the V/f pattern.
The following description includes setups required for the non-linear V/f pattern.
At high frequencies, the motor impedance may increase, resulting in an insufficient output
voltage and a decrease in output torque. This feature is used to increase the voltage with the
maximum output voltage 1 to prevent this problem from happening. Note, however, that you
cannot increase the output voltage beyond the voltage of the inverter’s input power.
Base Frequency 1 (F04)
Set the rated frequency printed on the nameplate labeled on the motor.
Rated Voltage at Base Frequency (F05)㩷
Set 0 or the rated voltage printed on the nameplate labeled on the motor.
- If 0 is set, the rated voltage at base frequency is determined by the power source of the
inverter. The output voltage will vary in line with any variance in input voltage.
- If the data is set to anything other than 0, the inverter automatically keeps the output
voltage constant in line with the setting. When any of the auto torque boost settings, auto
energy saving or slip compensation is active, the voltage settings should be equal to the
rated voltage of the motor.
Non-linear V/f Patterns 1 and 2 for Frequency (H50 and H52)
Set the frequency component at an arbitrary point of the non-linear V/f pattern.
(Setting 0.0 to H50 or H52 disables the non-linear V/f pattern operation.)
Non-linear V/f Patterns 1 and 2 for Voltage (H51 and H53)
Sets the voltage component at an arbitrary point of the non-linear V/f pattern.
Maximum Output Voltage (F06)㩷
Set the voltage for the maximum frequency 1 (F03).
• If F05 (Rated Voltage at Base Frequency 1) is set to "0," settings of H50 through
H53 and F06 do not take effect. (When the non-linear point is below the base
frequency, the linear V/f pattern applies; when it is above, the output voltage is
kept constant.)
• When the auto torque boost (F37) is enabled, the non-linear V/f pattern takes no
effect.
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