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System and method for rotor positioning within an electric motor

專利號
US11177749B2
公開日期
2021-11-16
申請人
Neapco Intellectual Property Holdings, LLC(US MI Farmington Hills)
發(fā)明人
Donald Remboski; Jacqueline Dedo; Mark Versteyhe
IPC分類
H02P7/29; H02P21/12; H02P21/22; H02P21/05
技術(shù)領(lǐng)域
rotor,stator,windings,motor,in,poles,electric,or,radial,may
地域: MI MI Farmington Hills

摘要

A system for controlling an electric motor including a rotor supported by a lubricant upon a stator with a plurality of stator poles and stator windings includes monitoring a radial position and rotor angle of the rotor by a controller. The system includes generating adjustments by the controller to cause the stator poles to apply a net radial force to the rotor. This net radial force may be used, for example to cause the rotor to be centered upon a central axis of the electric motor and may be particularly advantageous for a lubricant supported rotor. A motor drive provides an AC current to the stator windings as well as phase current adjustments of the electrical current in one or more of the stator windings to apply the net radial force to the rotor in a direction perpendicular to the drive axis.

說明書

More specifically, as shown in FIGS. 1A and 1B, the rotor 24 is rotatable about a drive axis 26 as shown by the rotational arrow 27. In some embodiments (not shown), the rotor 24 may be coupled to motor output shaft to provide torque to a load, such as to rotate a wheel of a vehicle. The stator 25 has a plurality of stator windings 28 wound around stator poles 29, which are radially spaced apart from one another about a central axis 30 parallel to the drive axis 26. FIGS. 1A and 1B show a particular embodiment including twelve stator poles 29, each having a stator windings 28 associated with one of three electrical phases (A, B, C). However, the electric motor 22 may have a different number of stator poles 29 and/or a different number and/or configuration of electrical phases (A, B, C). In some embodiments, the stator windings 28 are formed by winding a wire around each of the stator poles 29, as shown in FIGS. 1A and 1B. However, the stator windings 28 may take other forms such as I-pin or hair-pin type bar windings. In some embodiments, and as shown in FIGS. 1A and 1B, the stator windings 28 are each associated with a single one of the stator poles 29. However, each of the stator windings 28 may be operatively coupled to two or more of the stator poles 29. For example, each of the stator windings 28 may wind around two or more of the stator poles 29. Furthermore, in some embodiments, two or more of the stator windings 28 may be wound around one of the stator poles 29.

權(quán)利要求

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