Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Heekwang Lee"'
Publikováno v:
IEEE Access, Vol 9, Pp 168042-168051 (2021)
A strict fault tolerance is required in urban air mobility (UAM). The motor position sensor is one of the monitoring targets in UAMs, because it is in a harsh environment such as rain, ice, dust, vibration, etc. In this work, a resolver-based sensor
Externí odkaz:
https://doaj.org/article/7eeb612d4605424cb67aa7bc782f2829
Publikováno v:
Journal of Electrical Engineering & Technology. 17:1371-1378
A current transducer is a device that converts a current measurement into a voltage. Conventional current transducers convert the measured current into an analog voltage as output. The conventional current transducer usually includes the noise genera
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c72de56d4ab8f784ea1fde54d10b32ff
https://doi.org/10.1007/s42835-021-00940-0
https://doi.org/10.1007/s42835-021-00940-0
Publikováno v:
2021 IEEE Energy Conversion Congress and Exposition (ECCE).
A strict fault tolerance is required in urban air mobility (UAM). Position sensor is one of major maintenance target in permanent magnet synchronous motor (PMSM), since it is under hostile environments. As the sensor backup, sensorless algorithms are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b84c767ccf6ceaea91aed4b746feaaf8
https://doi.org/10.1109/ecce47101.2021.9594929
https://doi.org/10.1109/ecce47101.2021.9594929
Publikováno v:
IEEE Transactions on Industrial Electronics. 66:7624-7632
In this paper, an overmodulation (OVM) technique is proposed based on Fourier analysis. The OVM trajectory is a mixture of six arc segments of the inscribed circle and six vertices of the voltage hexagon. By adjusting the holding angle at each vertex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9bba73c932a07f797b021967ad7bfdd7
https://doi.org/10.1109/tie.2018.2883270
https://doi.org/10.1109/tie.2018.2883270
Publikováno v:
IEEE Transactions on Industrial Electronics. 64:6096-6104
Coasting is a deceleration driving mode not recurring to an active braking while sustaining rolling as much as possible. In an electric vehicle (EV), coasting should be realized in theory by letting the $q$ -axis current set to zero. However, uninten
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11e894dbe826d0b8c12a90c2e91afc0e
https://doi.org/10.1109/tie.2017.2681973
https://doi.org/10.1109/tie.2017.2681973
Publikováno v:
2018 IEEE Energy Conversion Congress and Exposition (ECCE).
An overmodulation (OVM) technique is proposed based on Fourier analysis. The OVM trajectory is a mixture of 6 arc segments of the inscribed circle and 6 vertices of the voltage hexagon. By adjusting the dwell time at each vertex, the modulation index
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6436a4fb2a5271c97523ebc419c221f
https://doi.org/10.1109/ecce.2018.8558282
https://doi.org/10.1109/ecce.2018.8558282
Publikováno v:
IEEE Transactions on Power Electronics. 30:909-921
A dual-inverter with an open-end winding motor configuration is an attractive method to supply a higher voltage to a motor for electric vehicle (EV) applications. A topology utilizing two isolated dc sources is considered to reap the advantages of re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1780f63666e7d9f2a009bbe765304155
https://doi.org/10.1109/tpel.2014.2312194
https://doi.org/10.1109/tpel.2014.2312194
Autor:
Heekwang Lee, Kwanghee Nam
Publikováno v:
2017 IEEE International Electric Machines and Drives Conference (IEMDC).
High motor saliency is required to increase the power density, and to reduce the use of permanent magnets (PM). It is a common practice to reduce the d-axis inductance (L d ) as much as possible to obtain a high saliency ratio. But, we should look at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b234312245825a7518ad55a357d553d5
https://doi.org/10.1109/iemdc.2017.8002309
https://doi.org/10.1109/iemdc.2017.8002309
Publikováno v:
2016 IEEE Energy Conversion Congress and Exposition (ECCE).
Coasting is a fuel-saving driving mode that is usually active when the vehicle slows down. In an electric vehicle (EV), coasting can be achieved by letting the q-axis current to be set to zero. However, braking action often occurs at high speeds when
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7bebe423d11b2fe55dab5f9119297f2
https://doi.org/10.1109/ecce.2016.7854921
https://doi.org/10.1109/ecce.2016.7854921
Autor:
Heekwang Lee, Seokwon Jeon
Publikováno v:
International Journal of Solids and Structures. 48:979-999
This study presents crack initiation, propagation and coalescence at or near pre-existing open cracks or flaws in a specimen under uniaxial compression. The flaw geometry in the specimen was a combination of a horizontal flaw and an inclined flaw und
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08a13292e15add6a601a25be44fdbfe4
https://doi.org/10.1016/j.ijsolstr.2010.12.001
https://doi.org/10.1016/j.ijsolstr.2010.12.001