LHC / ACTIVE FILTER |
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LHC ACTIVE FILTER | CERN |
Power In | 3 ~ 400V/10A |
Power Out | +/-450V / +/-10A |
Converter Type | Switch mode 4Q |
Voltage Loop Bandwidth | 10KHz |
1st Intervention |
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Responsibles: | Xavier GENILLON |
Yves GAILLARD |
The active filter is used to reduce the output voltage ripple of the LHC thyristor-power converters and to increase its voltage bandwidth.
An injection transformer is placed in series with the output capacitor bank.
The active filter has the characteristics of a voltage generator that injected through an isolation transformer a voltage Uc which is the opposite of the output voltage , in order to reduce the output ripple. It must be capable of withstanding the current caused by bridge rectifier or unusual transitional regimes.
Without active filter:
With active filter:
LHC AF power converter architecture
Power In | 3 ~ 400V/10A |
Power Out | +/-10A / 450V |
Cooling type | Fans |
Converter Weight | 40kg |
Converter Size | width: 5000mm |
depth: 5000mm | |
height: 2700mm |
Power Part simplified Architecture / Topology .pdf
Regulation Control simplified schematic
Number of LHC Active Filters installed in LHC: