128 01-6203-01R3, CG Drives & Automation
7.2.1.1. Linear V/f characteristic
The linear V/f characteristic is the most used characteristic shape for general applications
since they cause a torque that is largely constant.
Details
Select V/f characteristic control with linear characteristic:
1. Motor control mode 0x2C00 (P300.00) = "V/f characteristic control (VFC open loop) [6]"
2. V/f characteristic shape 0x2B00 (P302.00) = "Linear [0]"
Setting of the V/f characteristic:
• Limiting factors for the V/f characteristic are rated mains voltage 0x2540:001 (P208.01),
minimum frequency 0x2915 (P210.00) and maximum frequency 0x2916 (P211.00).
• The base voltage 0x2B01:001 (P303.01) is usually set to the rated motor voltage (motor
nameplate data). The base voltage is preset to the rated mains voltage. This again is
preset according to the product key of the inverter. Mains voltage
90
• The base frequency 0x2B01:002 (P303.02) is usually set to the rated motor frequency
(motor nameplate data).
The current output frequency can exceed the set maximum frequency if the gain for
the slip compensation in 0x2B09:001 (P315.01) is set to a value higher than 0.
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