| Paper |
Title |
Page |
| MOPAN070 |
Developments in High-precision Aspects of Power Converter Control for LHC
|
314 |
| |
- G. Fernqvist
- M. C. Bastos, A. Cantone, Q. King
CERN, Geneva
|
|
| |
The initial results from integration testing of the LHC magnet power converters revealed problems of low-frequency noise, settling time, drift with time and temperature, thermal management and EMC. These problems originated in the use of DSP, the A/D converter (ADC), the DC Current Transducer (DCCT) and their respective environments. This paper reports the methods used to improve the performance through hardware and software modifications and the results achieved.
|
|
| MOPAN072 |
High-precision Performance Testing of the LHC Power Converters
|
320 |
| |
- G. Fernqvist
- M. C. Bastos, A. Cantone, P. Dreesen, O. Fournier, G. Hudson
CERN, Geneva
|
|
| |
The magnet power converters for LHC were procured in three parts, power part, current transducers and control electronics, to enable a maximum of industrial participation in the manufacturing and still guarantee the very high precision (a few parts in 10-6) required by LHC. One consequence of this approach was several stages of system tests: factory reception tests, CERN reception tests, integration tests, short-circuit tests and commissioning on the final load in the LHC tunnel. The majority of the power converters for LHC have now been delivered, integrated into complete converters and high-precision performance testing is well advanced. This paper presents the techniques used for high-precision testing and the results obtained. It is also hoped to report results from the first sector commissioning.
|
|