V/F Voltage Boost - Lenze i55AE125B Manual

8.3.1

V/f voltage boost

The parameterisable voltage boost makes it possible to improve the starting performance for
applications requiring a high starting torque.
Preconditions
The function is only effective in the following motor control types:
V/f characteristic control (VFC open loop)
•
V/f characteristic control (VFC closed loop)
•
Details
In 0x2B12:001 (P316.01), a permanent voltage boost can be set.
•
In 0x2B12:002 (P316.02), an additional voltage boost can be set for acceleration processes
•
only.
②
Reference for the percentage setting of the voltage boost is the base voltage
•
(P303.01).
Parameter Name / value range / [default setting]
0x2B12:001 Fixed boost
(P316.01) (Fixed V/f boost)
0.0 ... [2.5]* ... 20.0 %
* Default setting depending on the size.
0x2B12:002 V/f voltage boost: Boost at acceleration
(P316.02) (V/f boosts: Dynam. V/f boost)
0.0 ... [0.0] ... 20.0 %
0x2B01:001 V/f shape data: Base voltage
(P303.01) (V/f shape data: Base voltage)
0 ... [230]* ... 5000 V
* Default setting depending on the size.
0x2B01:002 V/f shape data: Base frequency
(P303.02) (V/f shape data: Base frequency)
Device for 50-Hz mains: 0 ... [50]* ... 1500 Hz
Device for 60-Hz mains: 0 ... [60]* ... 1500 Hz
* Default setting depending on the size.
[%]
0x2540 001 :
0x2B01 001 :
100
0x2B12 002 :
0x2B12 001 :
0
0x2B01 002
0
0x2B12 001 : 0x2B01 002 :
2 2
Info
Fixed (constant) voltage boost for V/f characteristic control without feed-
back.
• 100 % ≡ V/f base voltage
• For the purpose of optimising the starting performance for applica-
tions requiring a high starting torque.
Additional voltage boost for V/f characteristic control without feedback.
• 100 % ≡ V/f base voltage
• This voltage boost is only active while the motor is accelerated. It then
acts in addition to the fixed voltage boost set in
(P316.01).
Base voltage and base frequency define the V/f ratio and thus the gradi-
ent of the V/f characteristic.
• The V/f base voltage is usually set to the rated motor voltage
0x2C01:007
• The V/f base frequency is usually set to the rated motor frequency
0x2C01:005
Optimisation of motor control
①
0x2B01:001
:
[Hz]
0x2916
0x2B01:001 (P303.01)
0x2B01:001 (P303.01)
(P320.07).
(P320.05).
Motor control
V/f voltage boost
0x2B12:001
183