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Linear reluctance motor

a technology of reluctance motor and reluctance, applied in the direction of electrical equipment, dynamo-electric machines, supports/enclosements/casings, etc., can solve the problem of large force density

Inactive Publication Date: 2007-08-09
POTTER STEVEN D
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The invention is a linear reluctance motor that has a high force density and can be designed in different ways for different applications. The motor includes a stator with interleaved blades and a shuttle that also has interleaved blades. The blades are thin and flexible, and there is a small gap between them to reduce friction and loss of flux. The motor can be designed with a large or small gap between the blades. The active component can be associated with either the stator or the shuttle, or both. The motor can be configured in different ways for different applications."

Problems solved by technology

Also, by making the blades relatively thin, the blade density can be increased resulting in a large force density.

Method used

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Embodiment Construction

[0090] Aside from the preferred embodiments disclosed below, this invention is capable of other embodiments and of being practiced or being carried out in various ways. Thus, it is to be understood that the invention is not limited in its application to the details of construction and the arrangements of components set forth in the following description or illustrated in the drawings.

[0091]FIG. 1 depicts a single blade 9 including a plurality of alternating high permeability teeth 28 and low permeability teeth 30 extending from blade root 29 and defining pitch P. In FIG. 1, teeth 28 and 30 extend perpendicular to the longitudinal axis of the blade but this is not a necessary limitation of the subject invention as discussed infra. Also, the longitudinal axis of the blade is the actuation axis 16 as defined herein.

[0092]FIG. 2 depicts a single blade set 11 including blades held in place by blade carrier or plate 13. FIG. 3 shows an alternative type of carrier 13′ where non-magnetic ...

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Abstract

A linear reluctance motor includes a stator with a set of spaced blades each extending in the direction of the actuation axis, each blade including a plurality of alternating low permeability and high permeability teeth. A shuttle also includes a set of spaced blades each extending in the direction of the actuation axis interleaved with the blades of the stator, each blade of the shuttle also including a plurality of alternating low permeability and high permeability teeth. An active component is associated with either the stator, the shuttle, or both. The active component is divided into at least N phases, each phase including a set of blades, a flux return portion, and a coil wound to produce flux through the sets of interleaved blades in a direction substantially transverse to the actuation axis.

Description

RELATED APPLICATIONS [0001] This application is a continuation of prior U.S. patent application Ser. No. 10 / 726,420 filed Dec. 3, 2003 (which is incorporated herein by reference) which claims the benefit of and priority to Provisional Patent Application Ser. No. 60 / 431,604 filed Dec. 6, 2002.FIELD OF THE INVENTION [0002] This invention relates to a linear reluctance motor. BACKGROUND OF THE INVENTION [0003] Conventional electric motors, both rotary and linear, have very poor torque and force density. For heavy lifting applications, mechanical means such as gears and screws are more typically used. Fluidic devices including pneumatic and hydraulic systems are also used. These mechanical methods generally involve noise, wear, backlash, poor shock tolerance, and high reflected inertia. The fluidic methods tend to increase system complexity due to the addition of a fluid system. Fluid systems are also harder to control than electric systems. Due to seal wear, the fluid methods are unrel...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H02K41/00H02K41/03
CPCH02K41/03H02K5/04
Inventor POTTER, STEVEN D.
Owner POTTER STEVEN D