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EasyInverter

An academic budget cost modular 4 arms inverter focused to use in researches

Initial development by Power Conditioning Laboratory (Laboratório de Condicionamento da Energia Elétrica), School of Electrical and Computer Engineering, at University of Campinas (UNICAMP Brazil).

The use of this project is free and conditioned to GNU General Propose License 3.0. The financial support was provide by São Paulo Research Foundation (FAPESP) under grants 2014/11720-7 and 2015/02325-0.

The publication of academics works contend results using this project if conditioned to a ACKNOWLEDGMENT and citation of this repository in the "acknowledgment part" of the article/paper.

You may use this text: "The authors are grateful to the EdgeVerter's work team by the inverter project, which is available at <https://github.com/hildogjr/EdgeVerter>"

The GERBERs and schematic PDF are provided in the Assemblies folder.

The most recent files was designed using Altium 18.

The Cost Bill of Materials can be updated by kicost -w -i BoM.xml -eda altium, installing by python -m pip install kicost.

Max values (limitation) / general specifications

The specification values are not necessary concomitant.

  • 10kW processing power;
  • 600V of DC link;
  • 50A in one phase;
  • 200kHz switching frequency;
  • 3.3V or 5V input logic control;
  • Min dead-time & phase transistors interlock on-board;
  • TWO extra relays;
  • SMD topology with TO-247 transistor to easy replacement;
  • Isolated power supplier to the gate driver (it not depends of PWM to works fine);
  • Protection: under voltage of the isolated supplier (gate driver), over current, over voltage on the group of transistors and over temperature.

Predicted powers proposes (look in power limitations)

  1. 800V/10A -> To inverters grid connected applications, motor control;
  2. 400V/30A -> To inverters grid connected applications, motor control;
  3. 100V/100A -> DC/DC converters.

Predicted uses, studies of

  1. DC/DC converters, e.g., boost, buck, buck-boost, push-pull;
  2. Power switching supplies, isolated topologies based on DC/DC converters;
  3. Resonant converters;
  4. Single-phase inverter, using the two first arms. Possibility to use the 3rd arm to synchronous connection to the grid and 4th to DC link boost/pre-load/discharge (discharge, pre-load and connection may be also performed by the two relays);
  5. Three-phase inverter three wire connection. With possibility of extra arm to pre-load/discharge of the DC link, DC/DC boost or any extra application connected to the same DC link;
  6. Three-phase inverter four wire connection (three-phase plus neutral);
  7. Single-phase back-to-back inverter (to three-phase is necessary use two boards);
  8. DOUBLE isolated single-phase inverters (independent DC links), to use as multilevel inverter applications;
  9. Three-phase Vienna rectifier.