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Therefore, a limp-home mode based on high-frequency injection sensorless strategy is proposed. The signal processing of conventional high-frequency rotating injection needs several filters, and the delay has an impact on estimated position, which is phase-based demodulation. In this paper, an amplitude-based demodulation strategy is proposed, which needs only one low-pass filter, meanwhile the digital control delay can be canceled automatically. Accordingly, the position estimation precision and robustness can be enhanced with the aid of proposed method. The feasibility and effectiveness of theoretical analysis is verified on an 18-kW PMSM drive system experimental platform. <\/jats:p>","DOI":"10.1177\/01423312221142972","type":"journal-article","created":{"date-parts":[[2023,1,7]],"date-time":"2023-01-07T07:01:26Z","timestamp":1673074886000},"page":"1685-1692","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":3,"title":["A sensorless control system of permanent magnet synchronous motor for electric locomotive based on improved high-frequency rotating injection method"],"prefix":"10.1177","volume":"45","author":[{"given":"Guanjun","family":"Li","sequence":"first","affiliation":[{"name":"School of Automation, Southeast University, P.R. China"},{"name":"Key Laboratory of Measurement and Control of Complex Systems of Engineering, Ministry of Education, P.R. China"},{"name":"China Electric Power Research Institute, P.R. China"}]},{"given":"Haoyuan","family":"Li","sequence":"additional","affiliation":[{"name":"China Electric Power Research Institute, P.R. China"}]},{"given":"Xianghui","family":"He","sequence":"additional","affiliation":[{"name":"School of Automation, Southeast University, P.R. China"},{"name":"Key Laboratory of Measurement and Control of Complex Systems of Engineering, Ministry of Education, P.R. China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8793-381X","authenticated-orcid":false,"given":"Xiangyu","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Automation, Southeast University, P.R. China"},{"name":"Key Laboratory of Measurement and Control of Complex Systems of Engineering, Ministry of Education, P.R. 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