Summary 500 words
The upgrade of the tracker system plans to develop a new power distribution scheme based on switching power converter technology. A big effort in the DC-DC converter design has been conducted to minimize the noise emissions. However, this effort has to be complemented with EMC studies at system level to predict noises problems during the integration stage. During last year, a set of Pspice simulations have shown the important influence of power network impedance and topology on noise emission of DC-DC converters. Nevertheless, these simulations need to be completed by a set of real measurements to confirm the effects of the network impedance magnitude and integration options in the current noise emission of the DC-DC switching converters.
This paper presents a set of real measurements of conducted and radiated noise emitted by a DC-DC converter with respect to different impedances and number of converters connected to a common power bus. The conducted noise emission at the input and at the output in different areas at system level has been measured. Also, radiation emissions (electric and magnetic field) from DC-DC converters in a semi-anechoic chamber are presented too. This is the first time that this kind of measurements is presented high energy physics. These measurements will be compared with common mode conducted emissions to establish a relationship between both radiated and CM conducted noise.
This paper is the last stage of the noise studies of DC-DC converters at system level. These simulation and measurements will help to define a set of integration rules and strategies that will define the specifications, location, granularity and filtering performance degradation for the DC-DC converters. The main goal of this study is to anticipate and minimize the total amount of noise present in the Tracker environment and reduce the risks during the integration of the system.