Variable-magnitude Voltage Signal Injection for Current Reconstruction in an IPMSM Sensorless Drive with a Single Sensoropen access
- Authors
- Im, Jun-Hyuk; Kim, Sang-Il; Kim, Rae-Young
- Issue Date
- Jul-2018
- Publisher
- KOREAN INST ELECTR ENG
- Keywords
- Current reconstruction; High frequency voltage signal injection; IPMSM; Single current sensor
- Citation
- JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY, v.13, no.4, pp.1558 - 1564
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY
- Volume
- 13
- Number
- 4
- Start Page
- 1558
- End Page
- 1564
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/149714
- DOI
- 10.5370/JEET.2018.13.4.1558
- ISSN
- 1975-0102
- Abstract
- Three-phase current is reconstructed from the dc-link current in an AC machine drive with a single current sensor. Switching pattern modification methods, in which the magnitude of the effective voltage vector is secured over its minimum, are investigated to accurately reconstruct the three-phase current. However, the existing methods that modify the switching pattern cause voltage and current distortions that degrade sensorless performance. This paper proposes a variable-magnitude voltage signal injection method based on a high frequency voltage signal injection. The proposed method generates a voltage reference vector that ensures the minimum magnitude of the effective voltage vector by varying the magnitude of the injection signal. This method can realize high quality current reconstruction without switching pattern modification. The proposed method is verified by experiments in a 600W Interior permanent magnet synchronous machine (IPMSM) drive system.
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