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108
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 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 Advanced magnetic flux vector control or 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 made valid as inflection points of S-pattern when Pr. 29 Acceleration/deceleration pattern
selection = "1" (S-pattern acceleration/deceleration A).
Parameters referred to
Pr. 14 Load pattern selection Refer to page 109
Pr. 29 Acceleration/deceleration pattern selection
Refer to page 120
Pr. 83 Rated motor voltage, Pr. 84 Rated motor frequency
Refer to page 127
General-purpose magnetic flux vector control
Refer to page 98
Advanced magnetic flux vector control Refer to page 95