Lenze i410 - Linear V;F Characteristic

9.2.3.1 Linear V/f
characterisc
The linear V/f characterisc leads to a constant torque.
Details
Select V/f characterisc control with linear characterisc:
1.
Mot
or control mode 0x2C00 (P300.00) = "V/f characterisc control (VFC open loop) [6]"
2.
V
/f
characterisc shape 0x2B00 (P302.00)= "Linear [0]"
Seng of the V/f characterisc:
•
Liming factors for the V/f characterisc are the rated mains voltage 0x2540:001
(P208.01), the minimum fr
equency 0x2915 (P210.00) and the 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 in turn is
preset according to the product key of the inverter. 4Mains voltage ^ 31
•
The base frequency 0x2B01:002 (P303.02) is usually set to the rated motor frequency
(motor nameplate data).
0
[V]
[Hz]
0
0x2B01 001:
0x2B01 002:
0x2540 001:
0x29160x2915
The actual output frequency can exceed the set maximum frequency if the gain
f
or the slip compensaon in 0x2B09:001 (P315.01) is set to a value higher than
0.
Example
Mot power
•
400 V
/50 Hz
Sengs
•
Ma
ximum frequency 75 Hz
•
Minimum frequency 10 Hz
Explanaon
•
Graphic on the le: The inverter is operated with a rated mains voltage of 400 V.
•
Gr
aphic on the right: The inverter is operated with a rated mains voltage of 480 V. This
allows the output voltage to further increase above 50 Hz.
0
[V]
[Hz]
0
0
[V]
[Hz]
0
10 50 75 10 50 75
400 400
480
Parameter Designaon Seng for this example
0x2540:001 (P208.01) Rated mains voltage 400 Ve [1] (on the
le) / 480 Ve [2] (on the right)
0x2915 (P210.00) Minimum frequency 10 Hz
0x2916 (P211.00) Maximum frequency 75 Hz
0x2B01:001 (P303.01) Base voltage 400 V
0x2B01:002 (P303.02) Base frequency 50 Hz
Conguring the motor control
V
/f characterisc control for asynchronous motor (VFC open loop)
Dene V/f characterisc shape
145