dailos joined powertech in 2019 with a bachelor in power electronics and finalized Master studies at the university in MADRID. PowerTech happily onboarded dailos and offered him the below topic for his master thesis. Today Dailos is a permanent part of our motivated engineering team.
The Master Thesis was developed as part of our PowerBriX Product Development in the area of Converter Controls (Embedded System).
I developed a feature for the Auxiliary Power Supply for railway application. The initial problem to solve was to detect any unwanted current flowing through the output wires going to ground. To achieve this I placed a residual current detection device at the AC output of the APU.
During the work on the thesis I handled with hardware topics regarding the reception of sensor data that needed to be acquired and adapted for later software processing.
Later, during the software part of my work, I had to cope with the processing of the received data and the concept on how to create "a flag" in case that a defined but configurable threshold of the limit is reached.
I ended up with two thresholds for the current: A "warning limit" and the "error limit". For PowerTech's customers it is utmost important that those limits are configurable. The flags are used as indicators for unwanted current flowing through the AC output. Each of our customer needs to decide how our system shall react when the thresholds are reached.
The proof of concept was conducted in PowerTech's powerlab with the complete system and was successfully tested.
With the first APUs being delivered to our customers in 2020 this feature was already put to operations.
It had a really motivational impact for me to develop a feature that added value to the functionality of PowerBriX - the new standard product for PowerTech.
And I need to point out and be thankful for the help I received from the Engineering Team and experienced Power Electronics Experts at PowerTech Converter.
Dailos Ramirez-Guski, Software Engineer Embedded Systems
PTC Rail OEM GmbH.