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Passive magnetic bearings for rotating equipment including induction machines
US9048701B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9048701-B2 |
| Application number | US-201113221074-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 30, 2011 |
| Priority date | Aug 30, 2011 |
| Publication date | Jun 2, 2015 |
| Grant date | Jun 2, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
Permanent magnet bearings are incorporated into rotating equipment, such as induction machines, in addition to active magnetic or lubricated primary shaft support bearings. The passive magnetic bearings incorporate permanent magnets that generate directionally oriented magnetic fields of selective intensity. The magnetic field directions are aligned with a desired shaft support bearing preload direction and intensity, for example to exert axial thrust or radial preloads on the support bearings. A plurality of magnetic bearings may be oriented in opposed relationship with neutral or offsetting resultant forces. The passive magnetic force preload may be utilized to offset rotor vertical weight during induction startup or stopping cycles. Passive magnetic force preload may be applied to lubricated bearings to assure their operational stability. The passive magnetic bearings can also absorb radial or axial thrust forces imparted on the rotor shaft during induction machine operation, that may reduce machine operational noise, and energy consumption.
First claim
Opening claim text (preview).
What is claimed is: 1. An induction machine apparatus, comprising: a machine housing; a bearing housing coupled to the machine housing; a stator in the machine housing; a rotor oriented within the stator, having a rotor shaft rotatively captured in the bearing housing; a rotor shaft support bearing, selected from the group consisting of a lubricated bearing and an active magnetic bearing, in the bearing housing, rotatively capturing the rotor shaft; and a permanent magne…
Assignees
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Classifications
- H02K7/09Primary
Electricity · mapped topic
Electricity · mapped topic
Mechanical Engineering · mapped topic
Electricity · mapped topic
Mechanical Engineering · mapped topic
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Frequently asked questions
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- What does patent US9048701B2 cover?
- Permanent magnet bearings are incorporated into rotating equipment, such as induction machines, in addition to active magnetic or lubricated primary shaft support bearings. The passive magnetic bearings incorporate permanent magnets that generate directionally oriented magnetic fields of selective intensity. The magnetic field directions are aligned with a desired shaft support bearing preload …
- Who is the assignee on this patent?
- Lang Nicholas G, Siemens Industry Inc
- What technology area does this patent fall under?
- Primary CPC classification H02K7/09. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jun 02 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).