ABB ACS 600 MultiDrive, Руководство пользователя

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Chapter 6 – Firmware Description
6-14 ACA 635 IGBT Supply Sections
The parameters and actual values of DC voltage control are listed
below.
Current Limit Control Because of the free wheeling diodes on the power plates, the
modulating ISU cannot limit the current when power flows from supply
network to the DC link. If the motoring power of the inverters increases
momentarily from the nominal level (allowed short term overload level),
current will flow from the network to the capacitors regardless of the
control. The waveform changes from sinusoidal to diode bridge mode
waveform, in which current peaks are considerably higher with the
same power. Overcurrent tripping limit is 98 percent of the maximum
value of the converter current measuring range (Parameter 4.08 CONV
MAX CURRENT).
During regeneration (braking) the current can be limited by means of
Parameter 137.01 TORQUE REF MAX. The calculated torque
reference (Parameter 122.03 TORQUE CALC REF)
is limited to the
absolute value of Parameter 137.01 TORQ REF MAX, which is 220
percent of the ISU nominal “torque”. Current limitation will cause a
voltage rise in the DC link. When the voltage reaches the limit of
Parameter 145.03 DC OVERVOLT TRIP, bit 15 DC OVERVOLT of
Parameter 9.11 SUPPLY FAULT WORD will be set and the ISU will
trip.
An alarm (Parameter 9.12 SUPPLY ALARM WORD bit 5 CURRENT
LIM) is generated, when the line current (Actual Signal 1.06 LINE
CURRENT) is exceeds the value of Parameter 137.04 CURRENT
LIMIT. Par. 137.04 CURRENT LIMIT is 220 percent of Parameter
112.02 HEAVY DUTY CUR which equals to
I
1base (10s/60s)
. This limit is
so close to the overcurrent trip limit, that an alarm is rarely generated
(before an overcurrent trip).
Code Parameter Unit Description
121.01 GAIN REL % Initial gain
121.02 DERIVATION TIME ms Initial derivation time
121.03 GAIN REL CALC % Calculated relative gain
121.04 DER TIME CALC ms Calculated derivation time
121.05 DC CTRL INTEG ms Initial integration time
Actual Value
161.07 TORQUE ACT % Nonfiltered torque value
161.08 TORQUE FILT ACT % Filtered torque value
1.05 161.09 FREQUENCY Hz Calculated line frequency
1.08 161.13 POWER kW Active power
1.10 160.04 DC VOLTAGE V Actual DC voltage
122.01 DC VOLTAGE ERROR V Error value between reference and
actual voltage
122.03 TORQUE CALC REF % PID controller output
122.04 TORQUE REF LIM % Torque hysteresis controller input