Chapter 12 Description of Parameter SettingsC2000-HS
12.1-01-9
In V/F, VFPG, SVC and FOC Sensorless modes
In FOCPG mode, when Pr. 01-34 is set to 2, it will act according to the setting of Pr. 01-34.
V/F Curve Selection
Default: 0
Settings 0: V/F curve determined by Pr. 01-00–01-08
1: 1.5
th
V/F curve
2: 2
nd
V/F curve
When setting to 0, refer to Pr. 01-01–01-08 for motor 1 V/F curve. For motor 2, refer to Pr.
01-35–01-42.
When setting to 1 or 2, the second and
third voltage frequency settings are invalid.
If the load on the motor is a variable torque load (torque is in direct proportion to rotating speed,
such as the load of a fan or a pump), the load torque is low at low rotating speed. Decreasing the
input voltage to make the magnetic field of the input current smaller and reduce flux loss and iron
loss for the motor to increase efficiency.
When you set the V/F curve to high power, it has lower torque at low frequency, and the drive is
not suitable for rapid acceleration and deceleration. Do NOT to use this parameter for rapid
acceleration and deceleration.
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