Fairs and Events

Scuola di misura - 14 February Bari, 15 February Roma

Title: Scuola di misura - free training event reserved for exclusively industrial users
Organizers: Rohde & Schwarz Italia, Wuerth Elektronik Italia and Batter Fly

Event details

Abstract School of Measurement:
We have created a dedicated area with eight (8) workstations where, with the support of our application engineers, you can try your hand at carrying out the four experiments.
By registering for a Scuola di Misura session, you will have time to perform all four experiments.

Experiment 1: Using the R&S MXO4 new generation oscilloscope. From the basic functions of the oscilloscope to the digital trigger, to the correct memory setting in relation to the signal to be analysed.

Experiment 2: EMC measurement of emissions conducted by a DC powered device, using a spectrum analyzer and LISN.

Experiment 3: DC/DC converter, Measurements on a converter and characterization of key parameters such as ripple current and switch frequency.

Experiment 4: Characterization of a bandpass filter using a Vector Network Analyzer (VNA), difference between different calibration techniques and measurement of the characteristic parameters of the filter.

March 14 Cinisello Balsamo (MI), March 15 Padua (PD), March 16 Bologna (BO)

Title: Free seminar "Switching power supplies: test methodologies and characterization"
Organizers: Rohde & Schwarz Italia, Wuerth Elektronik Italia and Batter Fly
Relatori: Ing. Gabriel Rojas e Ing. Angelo Strati

Event details

SESSIONE Ing. Gabriel Rojas (English)
In this seminar, we will discuss the various measurements that can be performed on switched mode power supplies using oscilloscopes in a context where emerging semiconductor technologies are becoming more and more common. One of the main areas of focus will be frequency response analysis, which involves analyzing the frequency response of the power supply to determine its performance and stability. Another important measurement is EMI debugging, which involves identifying and troubleshooting any electromagnetic interference that may be affecting the power supply.

We will also cover the measurement of switching frequency, which is critical in determining the performance of the power supply. Additionally, we will discuss the measurement of voltage and current waveforms, as well as rise and fall times, which are important in understanding the behavior of the power supply under different load conditions.

Overall, this seminar will provide attendees with a comprehensive understanding of the most common measurements used in the analysis and debugging of switched mode power supplies using oscilloscopes. Likewise, practical advice will be presented to improve the results of these measures.

SESSIONE Ing. Angelo Strati (Italian)
The choice of the correct type of capacitance, as well as the storage inductor, the switching frequency and the semiconductor components is, together with other parameters, vital for the efficiency of a DC/DC switching regulator with relative high currents both in input and output. A highly efficient switching regulator is ready to be put on the market if both it and the final product that uses it comply with all the necessary EMC standards. This often involves the addition of appropriate filtering, to be included at both the output and input in order to reduce the emission of interference.

In this seminar a FLYBACK type converter will be considered, in order to illustrate the electromagnetic emission generated by an isolated topology system, and how to reduce these emissions through the use of the appropriate EMC component.

Topics such as:
- Noise generated by the power supply, separated in common (CM) and differential (DM) mode
- Attenuation introduced by the filter
- Useful measures for minimize interference in addition to filter ( Snubber / HF coupling capacitance)
- Input and output voltage ripple
- Waveform at input capacitance node and switching voltage node
- Switching frequency and its impact on the system
- Influence of the open circuit bandwidth on the load step response

WE will illustrate to the participants a complete set of measurements that can help in understanding and designing a fully EMC compliant converter, but especially in optimizing the design process of a DC/DC converter.