03 POWER ELECTRONICS AND CABINET FEATURES
3BHS206977 E01 REV H
ACS1000I AIR-COOLED
USER MANUAL
3.4.9
Inverter
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 63.
Figure 3-12: Three-level voltage source inverter principle
3.4.10
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 3-13: Voltage and current waveforms at drive output
+
0
-
U=
Output voltage: 4.16 kV
Output frequency: 60 Hz
Содержание ACS1000i air-cooled
Страница 1: ... MEDIUM VOLTAGE AC DRIVES ACS1000i air cooled User manual ...
Страница 3: ...Contents ACS1000i air cooled User manual ...
Страница 5: ... 01 About this manual 01 5 16 ...
Страница 16: ......
Страница 17: ... 02 Important safety information 02 17 28 ...
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Страница 29: ... 03 Power electronics and cabinet features03 29 56 ...
Страница 57: ... 04 Control system 04 57 70 ...
Страница 71: ... 05 Transportation storage and disposal05 71 78 ...
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Страница 79: ... 06 Mechanical installation 06 79 88 ...
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Страница 89: ... 07 Electrical installation07 89 104 ...
Страница 105: ... 08 Commissioning 08 105 110 ...
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Страница 111: ... 09 Operation 09 111 124 ...
Страница 125: ... 10 CDP control panel 10 125 148 ...
Страница 149: ... 11 Preventive and corrective maintenance 11 149 172 ...
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