# Documentation of the UltraZohm

The UltraZohm is a powerful real-time computation platform for research, development, and rapid-control prototyping of power electronics and drive systems. Development is driven by researchers for researchers to establish a common control platform. Having a common platform enables the active research community to focus on publication and results, while platform development is a shared effort.

High Computational power

The UltraZohm is based on Xilinx Zynq UltraScale+ MPSoC (EG devices). These offer four ARM A53, two ARM R5, and a large FPGA (programmable logic - PL) in one System-on-a-Chip (SoC). The UltraScale is used with a System-on-a-Module (SoM) from Trenz Electronic GmbH. specifically the TE0808 with a ZU9EG device is the default and strongly recommended. Additionally, SoM with devices from 2EG (TE0803) to 15EG (TE0808) can be used with the UltraZohm framework out of the box using the Vivado build tcl scripts.

Hard real-time

The UltraZohm is designed to meet modern control systems’ timing requirements for power electronics. Thus, the control frequency of the real-time processor is in the range of $$10\,\mu s$$ to $$100\,\mu s$$, depending on the specific application. Additionally, many modern control algorithms such as model predictive control (MPC) and machine learning methods can be accelerated by using the PL (FPGA) of the UltraZohm. Therefore, the system is optimized for this approach.

Open Source

The UltraZohm is a platform with no black boxes and no barriers to your research. It is built with the intent to give users full control and the ability to easily adapt the system to their specific needs and preferences. Therefore, UltraZohm project is licensed by Apache 2.0 and the hardware is licensed under CERN-OHL-P. See License for details.

Modularity

The UltraZohm is modular regarding the UltraScale device to scale the computational power. The community continuously extends the platform with more hardware components, especially Adapter Cards for which templates and libraries exist. Furthermore, IP-Cores and software components are developed and shared, and included in the project.

Usability

The UltraZohm project thrives to be novice friendly with tutorials and an existing codebase. This is especially relevant to onboard new users with different backgrounds, ranging from bachelor, master’s, and PhD students to experienced engineers and developers. At the same time, the system is expert friendly with access to the last bit due to the lack of black boxes, access to the source code, and comprehensive documentation. In addition, there are multiple supported workflows for writing software (e.g., manually or using Embedded-Coder (C-Code)) and IP-Cores (manually, HDL-Coder (HDL), Vitis HLS).

Community

The UltraZohm community aims to connect researchers working on the same platform and solve infrastructure problems only once! We write and review code together, design PCBs, and share our knowledge regarding the UltraZohm, Xilinx UltraScale, electronics, control approaches, and many more! We welcome researchers from all around the world with an interest in the control of power electronics and electrical drives.

Documentation

Comprehensive and ever-growing documentation for the Ultrazohm on docs.ultrazohm.com.

Maintained & funded

Project development is funded by the BMBF with the research grant KI-Power and is actively maintained by the Institute ELSYS of TH Nuremberg as well as the Chair of High-Power Converter Systems (HLU) of TU Munich. In addition, researchers of TH Nuremberg and TU Munich founded the start-up Zohm Control GmbH to ensure the long term development of the system and to be able to distribute the fully assembled UltraZohm systems.

## UltraZohm Community Slack

• The UltraZohm community is organized using Slack

• Join the UltraZohm Slack

## Acquiring an UltraZohm

• Alternatively, one can build and manufacture the system on their own since the project is licensed as open source and open source hardware (see License)

• Note that while one is under no obligation to do so according to the licenses, it is advised to get in touch before building the system on your own

• Write us at info@ultrazohm.com or ask in the Slack channel if you have questions regarding building or purchasing a system

## Contributing

• We are accepting and welcoming contributions

• Forking & creating a pull request is possible for everybody (see fork a repository documentation)

• In principle, documentation, software, and even IP-Cores can be developed and contributed without physical access to an UltraZohm

• For IP-Cores, developing with a generic UltraScale development kit is advised

• While we try to reduce the barrier for contributions, physical access to an UltraZohm is often required

• Contributes can get in contact by mail or Slack to the maintainers to get write access to the repository and switch to a feature-branch workflow (see Contribution Workflow)

• Open in Gitpod for contributing without tool setup

## Research

The primary use of the UltraZohm is the research of modern control algorithms for power electronics and drive systems:

• Model predictive control of electric drives

• Model predictive control of power electronics systems

• Renewable energy systems

• Multilevel converter including Modular Multilevel Converter (MMC)

• Multi-phase motors (m>3)

• Special electric motor designs (e.g., transverse flux machine, synchronous reluctance motor)

• Machine Learning in drive systems