Mitsubishi Electric FR-A820-00046 Instruction Manual page 835

Parameters
Setting of base frequency voltage (Pr. 19)
● For Pr. 19 "Base frequency voltage", set the base voltage (rated motor voltage, etc.).
● When it is set lower than the power supply voltage, maximum output voltage of the inverter will
be the voltage set in Pr. 19.
● Pr. 19 can be used in following cases.
– Regenerative driving (continuous regeneration, etc.) is performed often
Output voltage will get higher than the specification during the regenerative driving, which
may cause overcurrent trip (E.OC[]) by the increase in motor current.
– When the fluctuation of power supply voltage is high
When the power supply voltage exceeds the rated voltage of the motor, fluctuation of rotation
speed or overheating of motor may occur due to excessive torque or increase in motor current.
● When operating vector control dedicated motor (SF-V5RU, SF-V5RU1, SF-V5RU3, SF-V5RU4, SF-VR)
with V/F control, perform following settings.
Motor model
SF-V5RU-3.7kW or lower
SF-V5RU-5.5kW or lower
SF-V5RUH-3.7kW or lower
SF-V5RUH-5.5kW or lower
SF-V5RU1-30kW or lower
SF-V5RU1-37kW
SF-V5RU3-22kW or lower
SF-V5RU3-30kW
SF-V5RU4-3.7kW and 7.5kW
SF-V5RU4 and motors other than described above
SF-VR
SF-VRH
Tab. 5-302: Setting of base frequency voltage
NOTES When the operation becomes not possible due to failure in encoder, etc., at the time of vector
control, set Pr. 80 "Motor capacity" or Pr. 81 "Number of motor poles" = "9999" to perform V/F con-
trol.
When the Advanced magnetic flux vector control, Real sensorless vector control, vector control, or
PM sensorless vector control is selected, Pr. 3, Pr. 47, Pr. 113, and Pr. 19 will become disabled, and
Pr. 83 and Pr. 84 will become enabled.
However, S-pattern curve with Pr. 29 "Acceleration/deceleration pattern selection" = "1" (S-pattern
acceleration/deceleration A) will make Pr. 3 or Pr. 47 and Pr. 113 enabled. (S-pattern curve at the
time of the PM sensorless vector control is the rated frequency of the motor.)
When Pr. 71 "Applied motor" = "2" (adjustable 5 points V/F), setting for Pr. 47 and Pr. 113 will
become disabled. Also, Pr. 19 cannot be set to "8888" or "9999".
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.
FR-A800
(G) Control parameters
Pr. 19 setting Pr. 3 setting
170 V
160 V
50 Hz
340 V
320 V
160 V
170 V
33.33 Hz
160 V
170 V
150 V
16.67 Hz
160 V
160 V
50 Hz
320 V
5 - 655