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Operation principle and hardware description 31
AC voltage and current waveforms
The AC current is sinusoidal at a unity power factor. The LCL filter suppresses the AC
voltage distortion and current harmonics. The high AC inductance smooths the line
voltage waveform distorted by the high-frequency switching of the converter. The
capacitive component of the filter effectively filters the high-frequency (over 1 kHz)
harmonics.
Charging
Charging is needed to power up the DC link capacitors smoothly. Discharged capacitors
cannot be connected to the full supply voltage. The voltage must be increased gradually
until the capacitors are charged and ready for normal use. The drive contains a resistive
charging circuit consisting of fuses, contactor and charging resistors. The charging circuit
is in use after start-up until the DC voltage has risen to a predefined level.
Motor-side converter
The motor-side converter converts the DC back to AC that rotates the motor. It is also able
to feed the braking energy from a rotating motor back into the DC link. The motor-side
converter is controlled by a type ZCU control unit (external control unit).
DC connection
You can connect an external brake chopper to the drive via the DC terminals. See chapter
Содержание ACS880-34
Страница 1: ... ABB INDUSTRIAL DRIVES ACS880 34 drive modules 132 to 400 kW 200 to 450 hp Hardware manual ...
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Страница 14: ...14 ...
Страница 22: ...22 Safety instructions ...
Страница 28: ...28 Introduction to the manual ...
Страница 42: ...42 Operation principle and hardware description ...
Страница 118: ...118 External control unit ...
Страница 140: ...140 Installation example with full cabling panels option H381 M8 16 Hex 2 5 4 3 1 1 1 1 2 6 7 ...
Страница 152: ...152 Installation checklist ...
Страница 156: ...156 Start up ...
Страница 158: ...158 Fault tracing ...
Страница 174: ...174 Maintenance ...
Страница 202: ...202 Technical data EU Declaration of Conformity Machinery Directive ...
Страница 204: ...204 Technical data ...
Страница 206: ...206 Dimension drawings Standard configuration 3AXD50000038012 ...
Страница 207: ...Dimension drawings 207 Location of power cable connection terminals with options H370 H356 3AXD50000038012 ...
Страница 208: ...208 Dimension drawings Drive module with options 0B051 H356 0H371 3AXD50000038012 ...
Страница 209: ...Dimension drawings 209 Configuration with option H381 3AXD50000323210 ...
Страница 210: ...210 Dimension drawings LCL filter module 3AXD50000206162 ...
Страница 214: ...214 Dimension drawings External control unit 3axd50000011687 ...
Страница 238: ...238 Resistor braking ...
Страница 242: ...242 du dt and sine filters ...
Страница 256: ...Contact us www abb com drives www abb com drivespartners 3AXD50000035191 Rev B EN 2018 09 28 ...