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Pulungan, Ali Basrah and Risfendra, Risfendra and Purwanto, Wawan and Maksum, Hasan and Setiawan, Oktrizal (2020) Design and Development of Real Time Monitoring Single Axis Solar Tracker by Using Internet of Things. International Journal of GEOMATE, 18 (69). pp. 81-87. ISSN Print: 2186-2982 dan Online: 2186-2990
Purwanto, Wawan and Risfendra, Risfendra and Fernandez, Donny and Putra, Dwi Sudarno and Sugiarto, Toto (2017) Design Comparison of Five Topologies Rotor Permanent Magnet Synchronous Motor for High-Speed Spindle Applications. International Journal of GEOMATE, 13 (40). pp. 148-154. ISSN 2186-2990 (online) dan 2186-2982 (Print)
Risfendra, Risfendra (2011) Analisa Unjuk Kerja Sistem Kendali Temperatur PT326 Process Trainer dengan Penerapan Algoritma Kontroler PID Digital Berbasis PC. Project Report. FT UNP, Padang.
Purwanto, Wawan and Maksum, Hasan and Sugiarto, Toto and Risfendra, Risfendra and Baharuddin, Agus and Marno, Marno (2019) Optimal Design of Stator Slot Geometry for High-Speed Spindle Induction Motor Applications. In: 2019 International Conference on Information and Communications Technology (ICOIACT), 24-25 Juli 2019.
Purwanto, Wawan and Risfendra, Risfendra and Putra, Dwi Sudarno (2018) Effect of Stator Slot Geometry on High Speed Spindle Motor Performance. In: International Conference on Information and Communications Technology (ICOIACT), 6-7 March 2018, Yogjakarta.
Ying-Shieh, Kung and Risfendra, Risfendra and Yi-De, Lin and Liang-Chiao, Huang (2015) The Estimation of Rotor Position and Speed for a Sensorless PMSM Drive Using High Frequency Signal Injection. In: Conference Proceedings Nagoya Japan, November 2015, Japan.
