Mitsubishi Electric FR-D720-008 Instruction Manual page 88

Set 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 (Twice the amount of the power supply voltage for single-phase 100V
power input model), 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 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.
NOTE
When General-purpose magnetic flux vector control is selected, Pr. 3, Pr. 47 and Pr. 19 are invalid and Pr. 83 and Pr. 84
are valid.
Note that Pr. 3 or Pr. 47 value is valid as inflection points of S-pattern when Pr. 29 Acceleration/deceleration pattern selection
= "1" (S-pattern acceleration/deceleration A).
Changing the terminal assignment using Pr. 178 to Pr. 182 (input terminal function selection) may affect the other
functions. Make setting after confirming the function of each terminal.
Parameters referred to
Pr. 14 Load pattern selection
Pr. 29 Acceleration/deceleration pattern selection
Pr. 83 Rated motor voltage, Pr. 84 Rated motor frequency
Pr. 178 to Pr. 182 (input terminal function selection)
General-purpose magnetic flux vector control
84
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Refer to page 97
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