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V/F pattern
(3) Base frequency voltage setting (Pr. 19)
⋅ Use Pr. 19 Base frequency voltage to set the base voltage (e.g. rated motor voltage).
⋅ If the setting is less than the power supply voltage, the maximum output voltage of the inverter is as set in Pr. 19.
⋅ Pr. 19 can be utilized in the following cases.
(a) When regeneration frequency is high (e.g. continuous regeneration)
During regeneration, the output voltage becomes higher than the reference and may cause an overcurrent trip
(E.OC) due to an increased motor current.
(b) When power supply voltage variation is large
When the power supply voltage exceeds the rated voltage of the motor, speed variation or motor overheat may
be caused by excessive torque or increased motor current.
⋅ Set parameters as below when running the vector control dedicated motor (SF-V5RU, SF-V5RU1, SF-V5RU3, SF-
V5RU4, SF-VR) under V/F control.
Motor Type Pr. 19 Setting Pr. 3 Setting
SF-V5RU-3.7kW or lower 170V
50Hz
SF-V5RU-5.5kW or higher 160V
SF-V5RUH-3.7kW or lower 340V
SF-V5RUH-5.5kW or higher 320V
SF-V5RU1-30kW or lower 160V
33.33Hz
SF-V5RU1-37kW 170V
SF-V5RU3-22kW or lower 160V
SF-V5RU3-30kW 170V
SF-V5RU4-3.7kW, 7.5kW 150V
16.67Hz
SF-V5RU4-other than the above 160V
SF-VR 160V
50Hz
SF-VRH 320V
REMARKS
When operation is discontinued under vector control due to failure of an encoder, etc., setting "9999" in Pr. 80 Motor capacity or Pr. 81
Number of motor poles enables V/F control operation.
CAUTION
⋅ When Advanced magnetic flux vector control mode, Real sensorless vector control or vector control is selected, Pr. 3, Pr. 47, Pr.
113 and Pr. 19 are invalid and Pr. 83 and Pr. 84 are valid.
Note that Pr. 3 or Pr. 47 and Pr. 113 values are valid as inflection points of S-pattern when Pr. 29 Acceleration/deceleration pattern
selection = "1" (S-pattern acceleration/deceleration A).
⋅ When Pr. 71 Applied motor is set to "2" (adjustable 5 points V/F characteristic), the Pr. 47 and Pr. 113 setting becomes invalid. In
addition, you cannot set "8888" or "9999" in Pr. 19.
⋅ Changing the terminal assignment using Pr. 178 to Pr. 189 (input terminal function selection) may affect the other functions. Set
parameters after confirming the function of each terminal.
♦ Parameters referred to ♦
Pr. 14 Load pattern selection Refer to page 161
Pr. 29 Acceleration/deceleration pattern selection Refer to page 176
Pr. 71 Applied motor Refer to page 187
Pr. 80 Motor capacity Refer to page 92
Pr. 83 Rated motor voltage, Pr. 84 Rated motor frequency Refer to page 189
Pr. 178 to Pr. 189 (input terminal function selection) Refer to page 231
Advanced magnetic flux vector control Refer to page 148
Real sensorless vector control Refer to page 92