Re: 400 kW likriktare
Postat: 29 januari 2013, 12:40:54
Svenskt forum för elektroniksnack.
https://elektronikforumet.com/forum/
Så ett snack med ABB vore nog på sin rätta plats.IGBT supply unit (ISU)
An IGBT supply unit is used in regenerative drive systems
to convert three-phase AC voltage to DC voltage. In power
control it gives the same firm but gentle performance as DTC
gives in motor control.
The main circuit consists of a main switch, a filter and a
converter. The converter is hardware compatible with drive
units. The converter can operate in both motoring and
generating modes. The DC voltage constant and the line
current sinusoidal. The control also provides a near unity
power factor. The control performance is excellent due to the
ultra-fast control technology, the same as in DTC.
A fully regenerative IGBT supply unit with power factor 1
requires no power compensation. The unit can also boost
DC voltage eg, when line voltage is low. Harmonic content
remains extremely low due to DTC control and LCL filtering.