New Permanent Magnet Synchronous Motor Current Sensing Phase Delay Compensation Method

- Journal title : Journal of Electrical Engineering and Technology
- Volume 11, Issue 1, 2016, pp.241-246
- Publisher : The Korean Institute of Electrical Engineers
- DOI : 10.5370/JEET.2016.11.1.241

Title & Authors

New Permanent Magnet Synchronous Motor Current Sensing Phase Delay Compensation Method

Park, Sei-Hun; Kim, Il-Hwan;

Park, Sei-Hun; Kim, Il-Hwan;

Abstract

This paper presents a method that can improve the performance of permanent magnet synchronous motor current control by minimizing the measured current phase delay caused by the Low Pass Filter(LPF) used to cut off the noises that flowed in when feedback currents are measured. Although existing methods that change the Cutoff Frequency of the LPF can minimize phase delays during high speed rotations, their noise cutoff effects are much lower and this may lead to the decline of control performance. Therefore, in this study, an algorithm that can compensate current phase delays through relatively simple calculations from the synchronous motor d-q axis coordinate transformation matrix and the inverse transformation matrix is proposed and the validity of the proposed method is verified by comparing the waveform of the calculated current with the waveform of actual currents through simulations and experiments.

Keywords

PMSM;Current sensing;Motor;VCF;Phase delay;

Language

English

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