Lenze i55AE155F User Manual

8.2.1.1 Linear V/f characterisc
The linear V/f characterisc is the most used characterisc shape for general applicaons
since they cause a torque that is largely constant.
Details
Select V/f characterisc control with linear 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) = "Linear [0]"
Seng of the V/f characterisc:
•
Liming factors for the V/f characterisc 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. 4Mains voltage ^ 144
•
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 current output frequency can exceed the set maximum frequency if the
gain for the slip compensaon in 0x2B09:001 (P315.01) is set to a value higher
than 0.
Example
In this example, a 400 V/50 Hz motor is connected to the inverter which is to be operated with
maximally 75 Hz. The minimum frequency is set to 10 Hz.
•
V/f characterisc on the le: The inverter is operated with a rated mains voltage of 400 V.
•
V/f characterisc on the right: The inverter is operated with a rated mains voltage of 480 V.
This causes the output voltage to further increase above 50 Hz.
0
[V]
[Hz]
0
0
[V]
[Hz]
010 50 75 10 50 75
400 400
480
Parameter Name 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
Next steps
•
The inverter provides dierent funcons by means of which the drive behaviour can be
further opmised.4Opmisaon of motor control ^ 182
•
An opmisaon of the control loops is not mandatory for this motor control type but may
lead to a
beer control mode. 4Opmisaon of the control loops ^ 193
Motor control
Motor control selecon
V/f characterisc control (VFC)
167

Lenze i55AE155F Specifications

General

Brand	Lenze
Model	i55AE155F
Category	Inverter
Language	English