Programmable Three-Phase Frequency Inverter: Design and Development of Hardware Components

Matej HAŇOV, Matej BEREŠ

This paper presents the design and implementation of the main hardware components of a programmable three-phase frequency inverter. The development focused on two key subsystems: the AC inverter and the control circuit.
A single-phase prototype was initially designed and tested before transitioning to the full three-phase version using silicon carbide transistors and galvanically isolated gate drivers. The control system, built on an STM32 microcontroller, generates PWM signals and manages communication through UART. Additional work included the design of a dedicated expansion board to streamline wiring and improve maintainability. Results from hardware testing demonstrate successful generation of sinusoidal PWM signals, stable operation of both single-phase and three-phase inverter prototypes, and correct real-time frequency adjustments. These findings establish a strong foundation for further integration of regulation and user interfaces in a complete inverter system.

Keywords: Frequency inverter, AC inverter, STM32 microcontroller, PWM generation, Hardware implementation, Silicon carbide transistors, Expansion board, Three-phase inverter

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vol: 8, issue: 2