Lenze i55AE155F User Manual

11.15 Mains failure control
In case of power failure, this funcon can decelerate the motor and use its rotaonal energy
to maintain the DC-bus voltage for a certain period of me. This makes it possible to connue
to let the motor run during a short-term failure of the mains voltage. Aer mains recovery, the
operang status that was acve before the failure is adopted again.
Details
A failure of the mains voltage causes a connuous DC-bus voltage drop. If the mains failure
control is enabled in 0x2D66:001 (P721.01), it will get acve if the DC-bus voltage falls below
the acvaon threshold set in 0x2D66:002 (P721.02).
As soon as the mains failure control is acve, the motor is decelerated. Now the rotaonal
energy of the motor is used to maintain the DC-bus voltage above the error threshold for
undervoltage unl the motor is decelerated to standsll in a controlled way. This process is
controlled by the DC-bus voltage controller.
0x2D66:006
0x2D66:005
0x2D66:003
0x2D66:004
0
1
0x2D66:001
0x2D66:002
0x2D66:008
0x2631:004
0x2D66:009
0x2D66:007 Clear time
Mains failure control
Status
Reset
Restart threshold
DC-bus activation level
Enable function
Trigger
①
Current DC-bus voltage
②
Frequency setpoint (internal input signal)
③
Frequency setpoint (internal output signal for motor control)
The acvaon and commissioning of the mains failure control are described in detail in the
following subchapters.
Parameter Name / value range / [default seng] Info
0x2D66:001
(P721.01)
Mains failure control: Enable funcon
(Mains fail. ctrl: Enable funcon)
•
From version 02.00
1 = enable mains failure control.
0 Disabled
1 Enabled
0x2D66:002
(P721.02)
Mains failure control: DC-bus acvaon level
(Mains fail. ctrl: DC-bus act.level)
60 ... [0]* ... 90 %
* Default seng depending on the size.
•
From version 02.00
Threshold below which the mains failure control is acvated if it is ena-
bled (0x2D66:001 (P721.01) = 1).
•
100 % ≡ nominal DC-bus voltage
Recommended seng:
•
In general: 5 ... 10 % above the error threshold for undervoltage (dis-
play in 0x2540:003 (P208.03)).
•
230-V devices: 72 %
•
400/480-V devices: 82 %
0x2D66:003
(P721.03)
Mains failure control: Gain V-controller
(Mains fail. ctrl: Gain V-ctrl)
0.00001 ... [0.01000] ... 0.50000 Hz/V
•
From version 02.00
Proporonal gain of the DC-bus voltage controller.
0x2D66:004
(P721.04)
Mains failure control: Reset me V-controller
(Mains fail. ctrl: Res. me V-ctrl)
5 ... [20] ... 2000 ms
•
From version 02.00
Reset me of the DC-bus voltage controller.
Addional funcons
Mains failure control
485

Lenze i55AE155F Specifications

General

Brand	Lenze
Model	i55AE155F
Category	Inverter
Language	English