Brushed electric motor/generator

Patent metadata

Field	Value
Publication number	US-11387692-B2
Application number	US-201916404631-A
Country	US
Kind code	B2
Filing date	May 6, 2019
Priority date	Mar 20, 2012
Publication date	Jul 12, 2022
Grant date	Jul 12, 2022

Abstract

Disclosed are various embodiments for an improved generator/motor and a method of generating current, the method comprising providing a circular rotation path, generating a concentrated magnetic field around a portion of the circular rotation path; rotating a coil along the circular path and through the concentrated magnetic field; generating current within the coil as a result of the rotating, and extracting the current from the coil.

First claim

The invention claimed is:

1. A DC generator/motor, comprising:
a rotor including a first partial toroidal magnetically closed tunnel enclosing a first portion of a circular rotation path, the first partial toroidal magnetically closed tunnel positioned around a longitudinal axis and defined by at least four magnetic walls, wherein each of the four magnetic walls has a corresponding magnetic pole of a first polarity that points towards an interior of the first partial magnetically closed tunnel that generates flux forces within the partial magnetically closed tunnel, and wherein one of the four magnetic walls has a circumferential slot defined therein; and
a stator including
a center shaft positioned along the longitudinal axis;
a hub coupled to the center shaft and having a portion sized to rotate within the circumferential slot;
a plurality of coils coupled to the hub and positioned radially about the hub such that the plurality of coils are moveable along the circular rotation path; and
a plurality of magnets fixedly coupled to the hub and positioned proximal to the circumferential slot, the plurality of magnets having a polarity orientated to redirect flux forces back into the first partial toroidal magnetically closed tunnel.

2. The DC generator/motor of claim 1 , wherein the first partial toroidal magnetically closed tunnel has an arc length of greater than 180 degrees.

3. The DC generator/motor of claim 1 , wherein flux forces generated by the first partial toroidal magnetically closed tunnel flow from interior faces of the partial toroidal magnetically closed tunnel towards the interior of the first partial toroidal magnetically closed tunnel, then flow in a direction generally parallel to the first portion of the circular rotation path.

4. The DC generator/motor of claim 1 , wherein the plurality of magnets fixedly coupled to the hub are positioned along a center axis of the hub.

5. The DC generator/motor of claim 1 , further comprising a plurality of commutator segments electrically connecting the individual coils of the plurality of coils to each other in series.

6. The DC generator/motor of claim 5 , further comprising a plurality of brushes mechanically coupled to the rotor and in electrical communication with the commutator segments.

7. The DC generator/motor of claim 1 , wherein a space radially and laterally adjacent to the first partial toroidal magnetically closed tunnel forms a throat.

8. The DC generator/motor of claim 7 , wherein a second partial toroidal magnetically closed tunnel is positioned within the throat.

9. A DC generator/motor, comprising:
a stator including a first partial toroidal magnetically closed tunnel enclosing a first portion of a circular rotation path, the first partial toroidal magnetically closed tunnel positioned around a longitudinal axis and defined by at least four magnetic walls, wherein each of the four magnetic walls has a corresponding magnetic pole of a first polarity that points towards an interior of the first partial magnetically closed tunnel that generates flux forces within the partial magnetically closed tunnel, and wherein one of the four magnetic walls has a circumferential slot defined therein; and
a rotor including
a center shaft positioned along the longitudinal axis;
a hub coupled to the center shaft and having a portion sized to rotate within the circumferential slot;
a plurality of coils coupled to the hub and positioned radially about the hub such that the plurality of coils are moveable along the circular rotation path; and
a plurality of magnets fixedly coupled to the hub and positioned proximal to the circumferential slot, the plurality of magnets having a polarity orientated to redirect flux forces back into the first partial toroidal magnetically closed tunnel.

10. The DC generator/motor of claim 9 , wherein the first partial toroidal magnetically closed tunnel has an arc length of greater than 180 degrees.

11. The DC generator/motor of claim 9 , wherein flux forces generated by the first partial toroidal magnetically closed tunnel flow from interior faces of the partial toroidal magnetically closed tunnel towards the interior of the first partial toroidal magnetically closed tunnel, then flow in a direction generally parallel to the first portion of the circular rotation path.

12. The DC generator/motor of claim 9 , wherein the plurality of magnets fixedly coupled to the hub are positioned along a center axis of the hub.

13. The DC generator/motor of claim 9 , further comprising a plurality of commutator segments electrically connecting the individual coils of the plurality of coils to each other in series.

14. The DC generator/motor of claim 13 , further comprising a plurality of brushes mechanically coupled to the stator and in electrical communication with the commutator segments.

15. The DC generator/motor of claim 9 , wherein a space radially and laterally adjacent to the first partial toroidal magnetically closed tunnel forms a throat.

16. The DC generator/motor of claim 15 , wherein a second partial toroidal magnetically closed tunnel is positioned within the throat.

17. A method of generating current, the method comprising:
providing a circular rotation path;
generating a first concentrated magnetic field along a first portion of the circular rotation path by a first closed toroidal magnetic tunnel positioned around the first portion of the circular rotation path, the first closed toroidal magnetic tunnel defined by a first set of at least four magnetic walls, wherein each of the first set of four magnetic walls has a corresponding magnetic pole of a first polarity that points towards a sectional center of the first closed toroidal magnetic tunnel for generating a first plurality of magnetic flux forces within the first closed toroidal magnetic tunnel, and wherein one of the first set of four magnetic walls has a first circumferential slot defined therein;
coupling at least one coil to a shaft via a coil assembly hub wherein a portion of the coil assembly hub is sized to pass through the first circumferential slot;
redirecting magnetic flux forces back into the first closed toroidal magnetic tunnel by positioning at least one magnet close to the first circumferential slot wherein the at least one magnet is coupled to the coil assembly hub;
moving at least one coil along the circular rotation path into the first concentrated magnetic field wherein the at least one coil has windings of an conductive material which are wound generally perpendicular to a movement of the coil;
generating direct current of a first direction within the windings when the at least one coil is moving within the first concentrated magnetic field;
extracting the direct current from the at least one coil through a first current path comprising at least two commutator segments electrically connected to at least two brushes;
moving the at least one coil along the circular rotation path into a second concentrated magnetic field positioned radially adjacent to the first concentrated magnetic field, wherein the second concentrated magnetic field is generated by a second closed toroidal magnetic tunnel positioned around a second portion of the circular rotation path, the second closed toroidal magnetic tunnel defined by a second set of at least four magnetic walls, wherein each of the second set of four magnetic walls has a corresponding magnetic pole of a second polarity that points towards a sectional center of the second closed toroidal magnetic tunnel for generating a second plurality of magnetic flux forces within

Assignees

• Linear Labs Inc

Inventors

• Hunstable Fred E

Classifications

• H02K1/223 Primary

  Rotor cores with windings and permanent magnets (for additional excitation in synchronous motors or generators H02K21/042; in synchronous motors having additional short-circuited winding for starting as an asynchronous motor H02K21/46) · CPC title

• H02K23/30

  having lap or loop windings · CPC title

• H02K23/04

  having permanent magnet excitation · CPC title

• H02K23/40

  characterised by the arrangement of the magnet circuits · CPC title

• H02K1/17 Primary

  Stator cores with permanent magnets · CPC title