ANALYSIS AND EXPERIMENTAL INVESTIGATION TO MITIGATE MECHANICAL VIBRATION AND ACOUSTIC NOISE IN DIRECT TORQUE CONTROLLER FED PMSM

R Sathya, A Sivaprakasam, T Manigandan

Abstract: The permanent magnet synchronous motor (PMSM) is receiving wide attention for industry application due to their high reliability, high power, high torque density and high efficiency. Recently, for application requiring high dynamic performance, direct torque control (DTC) is employed. Compared to other technique, DTC directly manipulates the final output voltage vector without the need of inner current loop and hence eliminate the inherent time delay. In spite of the merits, it had some disadvantages like large torque ripple and large acoustic noise among others. The mechanical vibration and acoustic noise are directly related to the large torque ripple. In existing, DTC fed PMSM uses the method of effective voltage vector combinations to reduce the torque ripple and thereby reduce the mechanical vibration and acoustic noise. In this proposed work, the analysis of mechanical vibration and acoustic noise is analyzed in both simulation and experimentally for various speeds and load changes. This analysis is done by using the Lab VIEW graphical programming language platform, which provides an efficient and accurate result.

Keywords: Acoustic noise, Frequency domain analysis, Direct Torque Control (DTC), Mechanical vibration, Permanent magnet synchronous motor (PMSM), Time domain analysis

DOI: https://doi.org/10.15623/ijret.2014.0319016