Comparison of Control Algorithms for the Suppression of Current Harmonics in PMSMs
- Electrical machines exhibit more or less strong current harmonics depending on their physical structure. The more slots are used per strand, the fewer harmonics an electrical machine has [1]. However, the manufacturing costs also increase with the number of slots. In permanent magnet synchronous machines (PMSM), the arrangement of the permanent magnets also influences the amplitude of the harmonics. Current harmonics can lead to increased motor noise and higher power losses. Therefore, it is worthwhile to deal with special controls which suppress these current harmonics. The aim of this work is to find a suitable control strategy for the suppression of current harmonics and to find out which method is suitable for which application. For this purpose, this paper presents and compares three types of control algorithms.