Open AccessResearch on Intelligent Control System of High Power Soft Starter Based on Discrete Frequency Conversion Technology
Author(s) -
Hui Peng
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1744/2/022006
Subject(s) - motor soft starter , thyristor , integrated gate commutated thyristor , control theory (sociology) , torque , realization (probability) , power (physics) , engineering , induction motor , computer science , thyristor drive , control engineering , electrical engineering , electronic engineering , voltage , control (management) , physics , mathematics , statistics , artificial intelligence , quantum mechanics , thermodynamics
Thyristor soft starter can effectively solve the three-phase asynchronous motor starting current problem, but its reduced starting current is achieved by reducing the output voltage and inevitably reducing the motor starting torque, it is difficult to use for heavy start of the occasion. A kind of soft starter based on discrete frequency conversion method is designed for the problem that the starting torque is small, the starting current is large, and the overloading cannot start. Based on the analysis of the working principle of the thyristor soft starter, this paper makes a deep research on the soft start control mode and realization method of the discrete frequency conversion without changing the main circuit structure of the original thyristor soft starter. Firstly, the soft starter hardware based on the three-phase anti-parallel thyristor main circuit and the current effective value is calculated by using high-speed A/D. Then, the soft start control strategy based on discrete frequency conversion is analyzed, with a 3kW/380V three-phase asynchronous motor for the test motor, respectively, the motor started a different way to simulate and test.