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Increased efficiency dual rotational electric motor/generator

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Increased efficiency dual rotational electric motor/generator


An enhanced dual rotational electric motor/generator includes an armature that rotates about a central axis in one direction, a stator that rotates about the central axis in an opposite direction, an axle that extends along the central axis and is secured to the armature, an axle support, a rotational output alignment mechanism for converting the opposite rotations of the armature and stator into a common rotational output direction, and an electrical connection mechanism that supplies functioning electrical communication between the motor/generator and external electrical circuitry while operating the motor/generator.

Browse recent E-wish Technology, LLC patents - Reno, NV, US
Inventor: Randell J. Wishart
USPTO Applicaton #: #20120286610 - Class: 310115 (USPTO) - 11/15/12 - Class 310 


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The Patent Description & Claims data below is from USPTO Patent Application 20120286610, Increased efficiency dual rotational electric motor/generator.

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CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a division of U.S. patent application Ser. No. 12/387,413 filed on May 1, 2009, now U.S. Pat. No. ______, incorporated herein by reference, which claims priority from U.S. provisional applications Ser. No. 61/126,320 filed on May 2, 2008 and Ser. No. 61/137,681 filed on Aug. 1, 2008.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The subject invention relates to an electric motor or generator (motor/generator), depending on the mode of operation of the subject device (a motor taking in current during operation and a generator out-putting current during operation), and to suitable systems and uses for the subject motor/generator. The subject motor/generator has an improved efficiency of operation over traditional motors/generators. More specifically, the subject invention is a dual rotational motor that comprises an electric motor/generator in which both the armature and the stator rotate during operation. Generally, the subject motor/generator is suspended or supported by support means, wherein an armature shaft or axle is attached to and extends from an armature of the motor/generator and a stator coupling means is attached to and extends from a stator of the subject motor/generator. Both the armature and the stator rotate, in opposite directions in the subject invention, thereby accessing torsional forces normally lost by utilizing traditional motor/generator mounts that prevent the stator from rotating.

2. Description of Related Art

For a traditional motor, the outside/surrounding motor housing is stationary, as is the “stator” within the housing. The stator is usually affixed to the housing. An internal “rotor” is attached to a shaft or axle that rotates during operation (in one version of a standard motor the rotor may be termed the “armature”). Thus, the armature shaft/axle extends out from the stationary motor housing and rotates when electrical current is applied to the motor (the armature rotates within the stationary stator). The history of electric motors is extensive and one version is found at www.sparkmuseum.com/MOTORS.HTM.

BRIEF

SUMMARY

OF THE INVENTION

An object of the present invention is to provide an electric motor/generator in which the armature rotates in a first direction and the stator rotates in an opposite second direction about a common central axis and then their opposite rotations are linked to create an output common rotational direction.

A second object of the subject invention is to improve the efficiency of an electric motor/generator by accessing torsional forces normally lost to stationary motor/generator mounts that hold the stator in a fixed position.

Another objective of the subject invention is to improve the efficiency of an electric motor/generator by accessing torsional forces normally lost to stationary motor/generator mounts by allowing the entire motor/generator to rotate freely with an armature and attached armature output means rotating in one direction and a stator and stator output means rotating in an opposite direction about a common central axis.

Yet a further objective of the subject invention is to improve the efficiency of an electric motor/generator by accessing torsional forces normally lost to stationary motor/generator mounts by rotationally securing at opposite ends output means and allowing the entire motor/generator to rotate freely with an armature-connected-shaft rotating in one direction and a stator-connected-out means rotating in an opposite direction and then linking the two opposite rotations into a common rotational output.

Disclosed is a novel configuration of an electric motor or generator, depending on the method of operation (electric current entering the subject device in the motor operational mode or electric current exiting the subject device in the generator operational mode). The subject invention utilizes torsional forces that are normally lost during the operation of existing types of electric motors and generators. Comprising the subject invention motor/generator are two halves that are rotationally mated with one another: 1) the armature half and 2) the stator half, both of which freely rotate during operations (unlike traditional motors in which the stator is stationary). For the subject invention, the two halves rotationally mate with one another. A first shaft is connected to and extends from the armature and a second rotational output means is connected to and extends from the stator. Bearings are incorporated for mounting the device, thereby bracketing both halves between supporting first and second bearings with each half rotating in an opposite direction during operation of the subject motor/generator. When a subject motor contains traditional brushes, the brushes (if present, but a brushless version is also within the realm of this disclosure and it is pointed out that permanent magnets are in the stator and a current running in the armature to produce electromagnets for the brush-type device and that permanent magnets are on the rotor and electromagnets on the stator with a suitable control means for a brushless-type device) are biased to maintain constant electrical contact as both halves rotate (in traditional motors the brushes are connected to a stationary component of the motor and do not rotate (usually, for a continuous electrical connection, the brushes are forced to touch the commutator by associated springs to deliver current in a motor and pick off current in a generator), but when they rotate in the subject invention (in a traditional motor the brushes do not rotate) the created centrifugal force needs to be overcome by a additional biasing means (counter-weights or the like that force the brushes to stay in contact with the commutator and oppose the centrifugal force) to maintain constant electrical contact.

More specifically, the subject enhanced electric motor/generator, comprises an armature that has first and second ends and which rotates about a central axis in a first direction. A stator with first and second ends rotates about the same central axis in a second direction. The stator surrounds at least a portion of the armature (in a traditional motor/generator like manner). An axle extends along the common central axis and is secured to the armature, wherein the axle rotates in the first direction (it is pointed out that in a reverse, yet basically equivalent, embodiment the axle may be secured to the stator, if desired). Usually, axle support means for supporting the axle and allowing rotation of the axle in the first direction are included in the subject invention. Rotational output means for converting the armature first direction rotation and the stator second direction rotation into a common rotational output direction are included in the subject invention. Electrical connection means are provided for supplying functioning electrical communication between the motor/generator and external electrical circuitry while operating the motor/generator. Preferably, the electrical connection means includes centrifugal-force-overcoming electrical contact maintenance means. Commonly, the centrifugal-force-overcoming electrical contact maintenance means comprises at least one brush (assuming the subject motor/generator utilizes brushes and is not a brushless system, but it is noted that even a brushless system is contemplated as being with the realm of this disclosure), a commutator (needed for electrical connection and necessary electromagnet field reversals) upon which the brush rides for electrical contact during operation of the electric motor/generator, and brush-associated counter-weights for overcoming centrifugal force on each brush, whereby each brush is directed inward toward the common central axis for maintaining brush-to-commutator contact during operation of the electric motor/generator.

Frequently, both the armature and stator are enclosed by a stator housing affixed to the stator. The stator housing rotates in the second direction about the common central axis and about the interior armature too. Clearly, in a brushless motor/generator an equivalent reversed configuration would apply.

Optionally, the rotational output means may comprise several equivalent variations, depending on the manner of use and type of device employing the motor/generator. A first embodiment comprises a drive shaft proximate said motor/generator, a pair of drive belts with one belt of the drive belt pair connecting the armature to the drive shaft and the another belt of the drive belt pair connecting the stator to the drive shaft, wherein one belt in the pair contains a 180° twist, thereby causing the drive shaft to rotate in the common rotational output direction.

A second embodiment comprises a rotational output means having a set of planetary gears associated with the stator second end (or armature first end, if desired), wherein when the stator rotates in the second direction the second direction rotation is converted into the first direction rotation (the armature\'s rotational direction) at the axle by the planetary gears.

A third embodiment of the rotational output means comprises a set of bevel gears that generate the common rotational output direction.

A forth embodiment of the rotational output means comprises a combination of armature-associate and stator-associated gears, sprockets, idler shaft, and chain drive that generates the common rotational output direction from the oppositely rotating armature and stator.

Optionally, the electrical connection means includes axle-associated slip-ring electrical pickup means.

Further objects and aspects of the invention will be brought out in the following portions of the specification, wherein the detailed description is for the purpose of fully disclosing preferred embodiments of the invention without placing limitations thereon.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S)

The invention will be more fully understood by reference to the following drawings which are for illustrative purposes only:

FIG. 1 is a perspective view of a first embodiment of the subject invention, operating as an electric motor, and mounted to bearing-containing support members.

FIG. 2A is a perspective view, including interior components in dashed lines, of the first embodiment of the subject invention seen in FIG. 1 showing the dual rotational directions for the interior armature and the surrounding stator.

FIG. 2B is a cross-sectional view of the first embodiment seen in FIGS. 1 and 2A showing the interior armature and surrounding stator.

FIG. 3 is a perspective view, including interior components in dashed lines, of a second embodiment of the subject invention, operating as an electric motor, showing the dual rotational directions for the interior armature and the surrounding stator.

FIG. 4A is a perspective view of a first embodiment of the subject invention, operating as a generator, that is mounted to two air-rotated drive wheels that rotate in opposite directions.

FIG. 4B is a perspective view of a second embodiment of the subject invention, operating as a generator, that is mounted to two air-rotated drive wheels that rotate in opposite directions.

FIG. 5 is a perspective view, including interior components in dashed lines, of the motor first embodiment of the subject invention seen in FIGS. 1, 2A, and 2B, showing the dual rotational directions for the interior armature and the surrounding stator in which the rotational output of the armature and the rotational output of the stator are aliened into a common rotational direction by utilizing a second drive belt that contains a 180° twist, relative to a first drive belt, with both belts then driving a drive shaft in a common rotational direction.

FIG. 6 is an end view of planetary gears that convert the opposite rotation of the armature or stator into a common rotational direction with the stator or armature, respectively.

FIG. 7 is an exploded-perspective view of the second motor embodiment of the subject invention seen in FIG. 3 showing the central axis shaft and armature having associated planetary gears that align the opposite rotations of the armature and stator into a common rotational direction to drive the shaft.

FIG. 8 is side-view of bevel gears that permit the oppositely rotating armature and stator in the subject invention to produce a common rotational direction to the associated drive shaft.

FIG. 9 is cross-sectional view of the subject invention showing counter-weighted brushes that stay in contact with the commutator during rotational operation of the subject device.

FIG. 10 shows a side-view of the subject invention in which the device is partially opened to show clearly the slip-ring electrical connections within the device.

DETAILED DESCRIPTION

OF THE INVENTION

Referring more specifically to the drawings, for illustrative purposes the present invention is presented in the embodiments generally shown in FIG. 1 through FIG. 10. It will be appreciated that the subject apparatus may vary as to configuration and as to details of the parts without departing from the basic concepts as disclosed herein.

It is stressed that the subject invention may be operated as either an electric motor or as a generator. Clearly, this ability is due to the well known relationship that an electric motor is, essentially, a generator run in reverse and vice versa. Several embodiments are presented and other equivalent variations are considered to be within the realm of this disclosure. Both DC or AC motors are both within the realm of this disclosure, however, for exemplary purposes only, the DC embodiment will be utilized to relate the subject invention.

Generally, the subject invention is an enhanced electric motor/generator that includes an armature having first and second ends that rotates about a central axis in a first direction, a stator having first and second ends that rotates about the central axis in a second direction and surrounds at least a portion of the armature, an axle extending along the central axis and secured to the armature, wherein the axle rotates in the first direction, axle support means for supporting the axle and allowing rotation of the axle in the first direction, rotational output means for converting the armature first direction rotation and the stator second direction rotation into a common rotational output direction, and electrical connection means for providing functioning electrical communication between the motor/generator and external electrical circuitry while operating the motor/generator. Frequently, the electrical connection means includes axle-associated slip-ring electrical pickup means.

Often the electrical connection means includes centrifugal-force-overcoming electrical contact maintenance means. Preferably, the centrifugal-force-overcoming electrical contact maintenance means comprises at least one brush, a commutator upon which the brush rides for electrical contact during operation of the electric motor/generator, and brush-associated counter-weights for overcoming centrifugal force on each brush, whereby each brush is directed inward toward the central axis for maintaining brush-to-commutator contact during operation of the electric motor/generator.

Optionally, the armature and the stator are both enclosed by a stator housing affixed to the stator and rotating with the stator in the second direction about the central axis.

Optionally, the rotational output means will vary upon the exact situation in which the subject device is employed. One embodiment of the rotational output means comprises a drive shaft proximate the motor/generator, a pair of drive belts with one belt of the drive belt pair connecting the armature to the drive shaft and another belt of the drive belt pair connecting the stator to the drive shaft, wherein one belt in the pair contains a 180° twist, thereby causing the drive shaft to rotate in the common rotational output direction.

A second embodiment of the rotational output means comprises a set of planetary gears associated with the stator, wherein when said stator rotates in the second direction the second direction rotation is converted into the first direction rotation at said axle.

A third embodiment of the rotational output means comprises a set of bevel gears that generate the common rotational output direction.

A fourth rotational output means comprises a combination of armature-associate and stator-associated gears, sprockets, idler shaft, and chain drive that generates the common rotational output direction from the oppositely rotating armature and stator.

Specifically, a first embodiment of the subject invention, utilized as an electric motor, is depicted in FIGS. 1, 2A, and 2B. Specifically, the subject invention motor 5 comprises two halves that are rotationally mated with one another: 1) the armature 10 and 2) the stator 15 (the term “stator” is utilized for descriptive purposes only and does not imply that this half is stationary, as is the case for a traditional stator), both the armature 10 and the stator 15 freely rotate during operations (again, unlike traditional motors in which the stator is stationary). Normally, the armature 5 contains the electromagnets 18 (coils of wire in which current flows) that are connected to an outside power source by suitable wires 20. Usually, the stator 15 contains the permanent magnets 19. The directional arrows seen in FIGS. 1 and 2A illustrate the opposite rotational directions of the moving armature 10 and stator 15. The first motor embodiment 5 depicts the stator being affixed to and surrounded by a stator housing 16. The stator housing 16 also encloses the internal armature 10.

A central axle or shaft 25 runs down the central axis of both the armature 10 and the stator 15. The axle or shaft 25 is supported with bearings 30 and 31 that attach it to support members 35 and 36. A base plate 37 anchors the support members 35 and 36.

When operating current is applied to the electromagnets 18 in the armature 10 rotational forces are created between the electromagnets 18 and the permanent magnets 19 in the stator 15. As in traditional electric motors, magnetic field reversing interactions between the contacting brushes associated with the stator and the rotor-associated commutator perpetuate the rotational forces. As with a traditional electric motor, the armature 10 rotates about the axle or shaft 25, but with the subject invention, so does the stator 15, but in an opposite rotational direction. As noted above, for exemplary purposes only, a brush-containing motor will be described herein. Brushless motors are within the realm of this disclosure, however, it is sufficient, for exemplary purposes, to describe the traditional brush-containing embodiments to illustrate and appropriately convey the novel construction and functioning of the subject invention. Actually, brushless motors do not require means to overcome centrifugal forces that create difficulties produced by rotating brushes in the stator (rotating brushes are eventually forced away from the commutator, thereby breaking necessary electrical contact).

FIG. 3 illustrates a second embodiment of the electric motor version of the subject invention. In this embodiment “primes” are utilized to denote equivalent components to those found in the first embodiment. In this embodiment the armature 10′ is surrounded by its own armature housing 19′ and the stator housing 16′ (containing the stator 15′) is less extensive. When this embodiment is operating, the armature housing 19′ can be seen rotating in an opposite direction to that of the stator housing 16′. The first and second embodiments function in identical fashion with one another.

FIG. 4A depicts a first embodiment of the generator 10 configuration for the subject invention and FIG. 4B show a second embodiment of the generator 10′ configuration for the subject invention. The device shown in FIGS. 4A and 4B differ in same manner in which the motor equivalent device in FIG. 3 differs from the motor device shown in FIGS. 1, 2A, and 2B. The FIG. 4A generator 40 first embodiment has both an armature housing 45 and a stator housing 50, while the FIG. 4B generator 40′ has only a stator housing 50′ that shows externally.



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stats Patent Info
Application #
US 20120286610 A1
Publish Date
11/15/2012
Document #
13507646
File Date
07/16/2012
USPTO Class
310115
Other USPTO Classes
International Class
02K16/00
Drawings
11



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