发明名称 MAGNETIC DRIVE DEVICES, AND RELATED SYSTEMS AND METHODS
摘要 A magnetic drive device may comprise a stator comprising a plurality of windings for generating a first number of magnetic pole pairs and a rotor comprising a plurality of permanent magnets for generating a second number of magnetic pole pairs that differs from the first number of magnetic pole pairs. The magnetic drive device may further comprise a plurality of free-spinning interpole elements disposed within an air gap between the stator and the rotor. The interpole elements may produce a magnetomotive force and harmonically couple the magnetic pole pairs of the stator with the magnet pole pairs of the rotor.
申请公布号 EP2820232(A4) 申请公布日期 2016.03.02
申请号 EP20130754224 申请日期 2013.03.01
申请人 NATIONAL OILWELL VARCO, L.P. 发明人 DAVEY, KENT R.;CARDELLINI, DAVID A.;SWIONTEK, CLIFF A.
分类号 E21B23/00;H02K7/11;H02K49/10 主分类号 E21B23/00
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