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System and method for rotor positioning within electric motor

一种电动机、电动机驱动器的技术，应用在电动机控制、交流电动机控制、电动组件等方向，能够解决主轴轴承易磨损、电动机故障、增加传统电动机重量等问题

Pending Publication Date: 2021-03-16
NEAPCO INTPROP HLDG LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such spindle bearings are prone to wear and can cause motor failure if the spindle bearing becomes worn or otherwise damaged
Spindle bearings also add weight to conventional electric motors

Method used

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  • System and method for rotor positioning within electric motor
  • System and method for rotor positioning within electric motor
  • System and method for rotor positioning within electric motor

Examples

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Embodiment Construction

[0012] Repeated features are marked with the same reference numerals in the figures in which an example embodiment of a system 20 for controlling an electric motor 22 is disclosed. In some embodiments, electric motor 22 is used as a traction motor for driving a wheeled vehicle, such as an automobile or truck. More specifically, in some embodiments, electric motor 22 is positioned within or near a wheel of a wheeled vehicle. Such end-of-wheel motor applications may subject the motor 22 to significant forces (eg, forces created by bumps and other terrain irregularities). Such wheel-end motor applications can benefit from the reduction in unsprung mass resulting from the downsizing or elimination of the main shaft bearings used in conventional electric motors.

[0013] Figure 1A An electric motor 22 is shown comprising a rotor 24 in a parked position, in contact with a stator 25 . Figure 1B The electric motor 22 is shown with the rotor 24 centered within the stator 25 and the...

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PUM

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Abstract

A system (20) for controlling an electric motor (22) including a rotor (24) supported by a lubricant (31) upon a stator (25) with a plurality of stator poles (29) and stator windings (28) includes monitoring a radial position (26) and rotor angle (27) 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 tothe rotor. This net radial force may be used, for example to cause the rotor to be centered upon a central axis (30) of the electric motor and may be particularly advantageous for the 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.

Description

technical field [0001] This application claims the benefit of U.S. Provisional Patent Application Serial No. 62 / 711,107, filed July 27, 2018, and U.S. Utility Patent Application Serial No. 16 / 522,838, filed July 26, 2019, the contents of which are incorporated by reference in their entirety into this article. technical field [0002] The present invention generally relates to a system and method for controlling an electric motor. More particularly, the present invention relates to a system and method for controlling current flow in a stator winding in an electric motor to control the position of the rotor within the electric motor. Background technique [0003] Electric motors generally include a rotor that rotates about a drive shaft by electromagnetic interaction with stator poles that support stator windings, which are energized by electrical current. [0004] Conventional electric motors include a rotor supported on a rotor shaft that is mounted on shaft bearings tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K7/09H02P25/02H02P6/16H02K7/08F16C32/04
CPCF16C17/02F16C32/0402F16C32/0497H02K7/086H02K7/09H02P6/16H02P25/02H02P2207/05H02P21/50H02P21/22H02P21/05H02P21/12H02P2207/01
Inventor 唐纳德·伦波斯基杰奎琳·德多马克·维尔斯特耶
Owner NEAPCO INTPROP HLDG LLC
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