# Speed Ripple Reduction of Direct-Drive PMSM Servo System at Low-Speed Operation Using Virtual Cogging Torque Control Method

> Research article (IEEE Transactions on Industrial Electronics, 2020) · cited 77× · AI/ML

**Wikidata**: [openalex:W2998064960](https://www.wikidata.org/wiki/openalex:W2998064960)  
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