Three-phase inverter with a variable control algorithm

The paper presents the construction of a three-phase frequency converter with possibility choosing type PWM modulation and smooth change modulated signal. In practical way, various inverter control algorithms were implemented in same hardware system using STM ARM Cortex M3 processor. use THIPWM allowed to reduce harmonic content output signal effectively possibilities power source. can choose one two scalar algorithms, option compensation for influence stator resistance on motor shaft torque initial range linear characteristic at constant voltage ratio. research confirmed that most advantageous this is unipolar double-edge modulation. method resulted gain amplitude fundamental operation mode compared SPWM method. appropriate precision step was also obtained, test results functionality converter.