Title :
Characteristics of burden resistors for high-precision DC current transducers
Author :
Fernqvist, G. ; Dreesen, P. ; Hudson, G. ; Pickering, J.
Author_Institution :
CERN, Geneva
Abstract :
The DC current transducer (DCCT) and accompanying A/D converter determine the precision of a power converter in accelerator operation. In the LHC context this precision approaches 10-6 (1 ppm). Inside the DCCT a burden resistor is used to convert the current to an output voltage. The performance of this resistor is crucial for the accuracy, temperature behaviour, settling time and long- term drift of the DCCT. This paper reports on evaluations, a new parameter called "power coefficient" (PC) and test results from some different types of resistors available on the market.
Keywords :
AC-DC power convertors; accelerator magnets; analogue-digital conversion; transducers; A/D converter; LHC; burden resistors; high-precision DC current transducers; magnet current; power converter; Current transformers; Feedback loop; Humidity; Large Hadron Collider; Power supplies; Resistors; Temperature; Testing; Thermal resistance; Transducers;
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
DOI :
10.1109/PAC.2007.4440197
