206
Operating Instructions ACU
12/16
18.2
Voltage controller
The voltage controller contains the functions necessary for monitoring the DC link voltage.
The DC link voltage which rises in generator operation or in the braking process of the 3-phase
machine is controlled to the set limit value by the voltage controller.
The power failure regulation uses the rotation energy of the drive to bridge short-term power
failures.
The voltage controller is set with the parameter
Operation Mode
670
in accordance with the
application.
Operation Mode 670
Function
0 - off
The function is switched off. Brake and motor chopper are active and
switch at the thresholds parameterized with
P.506
and
P.507
.
1 - DC link limitation active
Overvoltage controller switched on. Brake and motor chopper are
active and switch at the thresholds parameterized with
P.506
and
P.507
. Factory setting.
2 - Mains Support active
Mains failure regulation turned on. Brake and motor chopper are
active and switch at the thresholds parameterized with
P.506
and
P.507
. Can be used for quick shutdown.
3 -
Udc-Limit. &
Mains Supp. active
Overvoltage controller and power failure regulation switched on, with
motor chopper.
12 -
Mains support active,
without chopper
Mains failure regulation turned on. During mains support, the brake
and motor chopper are deactivated. In all other cases, the brake and
motor chopper are active and switch at the thresholds parameterized
with
P.506
and P.507.
13 -
Udc-Limit. &
Mains Supp. active
without chopper
Overvoltage controller and power failure regulation
switched on.
During mains support, the brake and motor chopper are deactivated.
In all other cases, the brake and motor chopper are active and
switch at the thresholds parameterized with
P.506
and
P.507
.
In ACU 501 and 601, mains failure regulation is effected via the DC link capacitor for a
maximum of 1 second. In the case of long mains failures, mains failure regulation
cannot be guaranteed.
The function motor chopper is available in the field-oriented control methods (in configurations 210,
230, 410, 411 and 430).
When an operation mode with motor chopper is selected, set
Trigger Threshold
507
< (
Reference
DC-Link Limitation
680
– 10 V ). See Chapter 19.7.1 "19.7.1".
For synchronous motors (
Configuration
30
=610), the motor chopper feature is
deactivated to prevent the motor from being damaged. The other functions of the
voltage controller are not affected by this.
For asynchronous motors in V/f control (
Configuration
30
=110), the motor chopper
feature is deactivated. The other functions of the voltage controller are not affected by
this.
The brake chopper is active depending on the setting of
Operation Mode
670
. For
parameterization of the switching threshold, refer to Chapter 19.4 "19.4".
Summary of Contents for active cube 201
Page 1: ...ACTIVE CUBE Operating Instructions Frequency inverter 230 V 400 V 0 25 kW 132 kW...
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Page 45: ...12 16 Operating Instructions ACU 45...
Page 181: ...12 16 Operating Instructions ACU 181...
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