TY - GEN
T1 - Rotor structure suppressing suspension force ripple in an IPM type bearingless motor with 2-pole motor windings and 4-pole suspension windings
AU - Matsuzaki, Tatsuya
AU - Takemoto, Masatsugu
AU - Ogasawara, Satoshi
AU - Ota, Satoru
AU - Oi, Kazunobu
AU - Matsuhashi, Daiki
PY - 2012
Y1 - 2012
N2 - A bearingless motor has integrated characteristics of an electrical motor and a magnetic bearing. In general, surface permanent magnet (SPM) type rotor structure with a ring magnet magnetized in parallel is employed in high-speed PM type bearingless motors. However, in case of increasing motor size for high output, this rotor structure has problems of insufficient suspension force due to a wide air gap and high cost by using the large-diameter ring magnet magnetized in parallel. Therefore, this paper discusses a novel interior permanent magnet (IPM) type rotor structure for the high-speed and high-output bearingless motor. In the novel IPM type rotor structure, suspension force ripple is suppressed by means of arranging flux barriers at the suitable position in a rotor. It is confirmed with 2D-FEM that the proposed rotor structure using the flux barriers is effective in suppressing the suspension force ripple.
AB - A bearingless motor has integrated characteristics of an electrical motor and a magnetic bearing. In general, surface permanent magnet (SPM) type rotor structure with a ring magnet magnetized in parallel is employed in high-speed PM type bearingless motors. However, in case of increasing motor size for high output, this rotor structure has problems of insufficient suspension force due to a wide air gap and high cost by using the large-diameter ring magnet magnetized in parallel. Therefore, this paper discusses a novel interior permanent magnet (IPM) type rotor structure for the high-speed and high-output bearingless motor. In the novel IPM type rotor structure, suspension force ripple is suppressed by means of arranging flux barriers at the suitable position in a rotor. It is confirmed with 2D-FEM that the proposed rotor structure using the flux barriers is effective in suppressing the suspension force ripple.
KW - Bearingless motors
KW - highspeed machines
KW - magnetic bearings
KW - magnetic levitation
KW - magnetic suspension
KW - suspension force ripple
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U2 - 10.1109/ICElMach.2012.6349957
DO - 10.1109/ICElMach.2012.6349957
M3 - Conference contribution
AN - SCOPUS:84870807770
SN - 9781467301428
T3 - Proceedings - 2012 20th International Conference on Electrical Machines, ICEM 2012
SP - 744
EP - 750
BT - Proceedings - 2012 20th International Conference on Electrical Machines, ICEM 2012
T2 - 2012 20th International Conference on Electrical Machines, ICEM 2012
Y2 - 2 September 2012 through 5 September 2012
ER -