3-Leg Inverter Control for 2-Phase Outer Rotor Coreless Torque Actuator in Hybrid Multi-DOF Systemopen access
- Authors
- Joo, Kyoung Jin; Lee, Gang Seok; Hong, Hyun Seok; Won, Sung Hong; Lee, Ju
- Issue Date
- Jun-2018
- Publisher
- MDPI
- Keywords
- outer rotor; coreless; torque actuator; 2-phase 3-leg inverter; multi-DOF; gimbal system; tilting control
- Citation
- ENERGIES, v.11, no.6, pp.1 - 11
- Indexed
- SCIE
SCOPUS
- Journal Title
- ENERGIES
- Volume
- 11
- Number
- 6
- Start Page
- 1
- End Page
- 11
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/149942
- DOI
- 10.3390/en11061611
- ISSN
- 1996-1073
- Abstract
- Since an existing 3-phase inner rotor torque actuator (TA) has severe torque ripples, it is not appropriate for a gimbal system that requires precise position control. Therefore, a coreless TA is considered to eliminate the core causing torque ripples. In order to compensate for several problems (e.g., problems of production structures and output degradation) when a coreless type is used, the final 2-phase outer rotor is proposed for the low vibration and high power TA in the gimbal system. To control the 2-phase TA applied to such the gimbal system, special inverter control methods, such as bi-directional drive for tilting control and control for output torque improvement, are required. The 2-phase 3-leg inverter is free of DC capacitor voltage unbalance compared to the 2-leg inverter, and is economical because it uses less power switches than the 4-leg inverter. Therefore, the 2-phase 3-leg inverter is applied to drive the 2-phase outer rotor coreless TA of a hybrid gimbal system, and it is verified through simulation.
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