Lenze i550

10.4.3.3 Adapve V/f characterisc
The adapve V/f characterisc is based on the linear V/f characterisc. An addional charac-
terisc point enables the adaptaon to applicaons with special torque properes.
Details
This characterisc shape is suitable for applicaons that require a higher torque at lower
speeds. The addional characterisc point can be congured in such a way that a higher volt-
age is provided in the lower frequency range of the characterisc. Otherwise, the same limits
apply for the adapve characterisc as for the linear characterisc.
Select V/f characterisc control with adapve characterisc:
1.
Motor control mode 0x2C00 (P300.00) = "V/f characterisc control (VFC open loop) [6]"
2.
V/f characterisc shape 0x2B00 (P302.00)= "Mulpoint [2]"
Seng of the V/f characterisc:
•
Liming factors for the V/f characterisc:
•
Rated mains voltage 0x2540:001 (P208.01)
•
Minimum frequency0x2915 (P210.00)
•
Maximum frequency 0x2916 (P211.00)
•
The rated mains voltage is set as the base voltage 0x2B01:001 (P303.01). The rated mains
voltage corresponds to the product key of the inverter . The base voltage is set to the rated
motor voltage (motor nameplate specicaon).
•
The base frequency 0x2B01:002 (P303.02) is set to the rated motor frequency (motor
nameplate data).
•
The addional characterisc point is dened based on the parameters 0x2B01:003
(P303.03) and 0x2B01:004 (P303.04).
Characterisc examples:
•
Graphic on the le: the base voltage is set equal to rated mains voltage.
•
Graphic on the right: the base voltage is set lower than the rated mains voltage.
0
[V]
[Hz]
0
0x2B01 001:
0x2B01 002:
0x2540 001:
0x2916
0x2915
0x2B01 003:
0x2B01 004:
0
[V]
[Hz]
0
0x2B01 001:
0x2B01 002:
0x2540 001:
0x2916
0x2915
0x2B01 003:
0x2B01 004:
=
Parameter
Address Name / seng range / [default seng] Info
0x2B01:003
(P303.03)
V/f shape data: Midpoint voltage
(V/f shape data: Midpoint voltage)
0 ... [0] ... 5000 V
•
From version 03.00
Denion of the medium characterisc point for user-denable V/f char-
acterisc.
•
Only relevant if V/f characterisc shape 0x2B00 (P302.00) is set =
"Mulpoint [2]".
0x2B01:004
(P303.04)
V/f shape data: Midpoint frequency
(V/f shape data: Midpoint freq)
0 ... [0] ... 1500 Hz
•
From version 03.00
Conguring the motor control
V/f characterisc control for asynchronous motor (VFC open loop)
Dene V/f characterisc shape
180