MAN-POWERED SLIM CHARGER

• US 20090051317A1
• Filed: 08/20/2007
• Published: 02/26/2009
• Est. Priority Date: 08/20/2007
• Status: Active Grant

• Current Assignee: Easy Energy, Inc. (Raphael Pharmaceutical, Inc.)
• Original Assignee: Easy Energy, Inc. (Raphael Pharmaceutical, Inc.)
• Inventors: Lanzet, Roman, Sromin, Alexander, Fridhendler, Michael
• Granted Patent: US 7,741,804 B2
• Time in Patent Office: Days
• US Class Current: 320/114
• CPC Class Codes: H02J 7/32 for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
• CPC Class Codes: H02K 1/2795 the rotor consisting of two or more circumferentially positioned magnets
• CPC Class Codes: H02K 21/24 with magnets axially facing the armatures, e.g. hub-type cycle dynamos
• CPC Class Codes: H02K 3/26 consisting of printed conductors
• CPC Class Codes: H02K 7/1853 driven by intermittent forces
• CPC Class Codes: Y02B 40/00 Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Abstract

A human-powered slim charger utilizing an axial flux alternator for converting a pull-out motion into an electrical current for charging and supplying battery-fed electronic devices. The charger comprises mechanical transmission means for converting a periodic linear movement into a unidirectional rotation, an axial flux alternator comprising a stator comprising a planar winding, having a plurality of coils embedded in multiple layers within said stator and circularly distributed around a central axis and two essentially identical rotors arranged to rotate together around said central axis and allocated concentrically with said winding on both sides of said stator facing each other; wherein each said rotor comprises a periodical heteropolar axially magnetized magnetic system having a definite number of poles; Finally, the device comprises a charging control module affixed to the stator, said control module configured effectively convert non-stable alternating current produced by said alternator into a charging direct current.

Claims

1. A human-powered slim charger utilizing an axial flux alternator for converting a pull-out motion into an electrical current for charging and supplying battery-fed electronic devices, said charger comprising:

mechanical transmission means for converting a periodic linear movement into a unidirectional rotation;

an axial flux alternator comprising;

a central stator plate comprising a planar winding, having a plurality of coils embedded in said plate and circularly distributed around a central axis;

two essentially identical rotors arranged to rotate together around said

central axis and allocated concentrically with said winding on both sides of said stator facing each other;

wherein each said rotor comprises a periodical heteropolar axially magnetized magnetic system having a definite number of poles;

and wherein said magnetic systems face each other and are oriented accordingly to form together a common magnetic field crossing said planar winding;

a charging control module affixed to said stator, said control nodule configured effectively convert non-stable alternating current produced by said alternator into a charging direct current.

2. The charger of claim 1, wherein said mechanical transmission means comprise:

a revolving element;

a cord reeled around said revolving element and secured thereto by one end and is further configured to be pulled out by its second end;

a torsion spring with one fixed end and with the second end connected to the drum;

a clutch providing unidirectional transmission of applied torque from said drum to said alternator.

3. The charger of claim 1, wherein each rotor comprises a planar thin soft magnetic disk affixed to the back of each rotor, closing the magnetic field is attached.

4. The charger of claim 1, wherein the charging controller further comprises a rectifier.

5. The charger of claim 1, wherein the mechanical transmission further comprises means for the speed multiplication to increase the output rotation speed.

6. The charger of claim 5, wherein said means for speed multiplication comprises at least one gear couple.

7. The charger of claim 5, wherein said means for speed multiplication comprises at least one belt couple.

8. The charger of claim 5, wherein said means for speed multiplication comprises at least one chain couple.

9. The charger of claim 1, wherein said planar winding of said alternator is implemented as a multilayered printed circuit board (PCB).

10. The charger of claim 1, wherein said planar winding of said alternator is made from coils reeled from magnet wire and secured on said central stator plate.

11. The charger of claim 1, wherein said planar winding of said alternator is made from conductors produced by copper stamping and embedded within said central stator plate.

12. The charger of claim 1, wherein said planar winding of said alternator is made from conductors produced by etching technology and embedded within said central stator plate.

13. The charger of claim 9, wherein the coils of said alternator comprise planar spiral-like conductor loops in every layer interconnected throughout the layers to form a substantially multi-layered three-dimensional spiral inductor.

14. The charger of claim 9, wherein the coils of said alternator form multi-phase windings using inter-coil connection providing a required voltage level at nominal alternator rotation speed.

15. The charger of claim 9, wherein the coils of said alternator form a single-phase winding, with the number of coils equal to the total number of poles of the rotor;

inter coil connection provides the required voltage level at nominal alternator rotation speed.

16. The charger of claim 10, wherein all the coils of said alternator are connected in series.

17. The charger of claim 1, wherein said heteropolar magnetic systems of rotors of said alternator is implemented as a plurality of permanent magnet pieces.

18. The charger of claim 1, wherein said heteropolar magnetic systems of rotors of said alternator are made as a single-piece multi-pole permanent magnet down.

19. The charger of claim 1, wherein said rotors of said alternator comprise a plurality of retainers positioned on their radial periphery for securing said magnetic systems and increasing the inertia.

20. The charger of claim 9 wherein said charging control module utilizes the same PCB for its inter-component connections.

21. The charger of claim 1, wherein said charging control module comprises an intermittent electrical energy accumulator.

22. The charger of claim 1, wherein said charging control module comprises state-of-charge (SOC) monitoring.

23. The charger of claim 1, wherein all components thereof are packed in a slim compact housing.

24. The charger of claim 1, wherein said charger is configured to fit into the back of cellular phone housing.

25. The alternator of claim 1, wherein the alternator is electrically configured to fit into a power plug of a portable device accessory.