03 POWER ELECTRONICS AND CABINET FEATURES
3BHS213401 E01 REV H
ACS1000 AIR-COOLED
USER MANUAL
38/184
3.4.7
Inverter
The compartment contains the inverter and the DC-link capacitors and filter capacitors.
The inverter converts the DC voltage to the required AC motor voltage and frequency.
Each phase of the three-phase inverter consists of a combination of four IGCTs and two NP
diodes for three-level switching operation. The output is switched between positive DC
voltage, neutral point (NP) and negative DC voltage. Hence, the drive can control the output
voltage and the frequency continuously from zero to maximum using direct torque control. For
more information, see “4.2.2.4 Direct torque control” on page 58.
Figure 3-8: Three-level voltage source inverter principle
3.4.8
Filter
The filter at the drive output reduces the harmonic content of the motor voltage and generates
a nearly sinusoidal motor-friendly voltage waveform. The filter also eliminates all high dv/dt
effects. Therefore, standard motors can be used, and voltage reflections in the motor cables
are eliminated.
Figure 3-9: Voltage and current waveforms at drive output
3.4.9
Optional Braking Chopper
The optional braking chopper uses resistor braking to provide motor braking and shorter
deceleration times, eg, for:
+
0
-
U=
Output voltage: 4.16 kV
Output frequency: 60 Hz
Содержание ACS 1013-A1
Страница 1: ... MEDIUM VOLTAGE AC DRIVES ACS1000 air cooled User manual ...
Страница 3: ...Contents ACS1000 air cooled User manual ...
Страница 5: ... 01 About this manual 01 3 14 ...
Страница 16: ......
Страница 17: ... 02 Important safety information 02 15 26 ...
Страница 28: ......
Страница 29: ... 03 Power electronics and cabinet features03 27 50 ...
Страница 53: ... 04 Control system 04 51 66 ...
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Страница 69: ... 05 Transportation storage and disposal05 67 74 ...
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Страница 77: ... 06 Mechanical installation 06 75 82 ...
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Страница 85: ... 07 Electrical installation07 83 106 ...
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Страница 109: ... 08 Commissioning 08 107 112 ...
Страница 115: ... 09 Operation 09 113 126 ...
Страница 129: ... 10 CDP control panel 10 127 150 ...
Страница 153: ... 11 Preventive and corrective maintenance 11 151 182 ...
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