US3610979A — Alternator having stationary primary and secondar…

Claim 1

Independent Claim 173 words

In a rotary electric machine comprising a stator winding, a stator slotted to receive said winding and a rotor comprising two coaxial magnetic cheek plates spaced by a coaxial magnetic core, each cheek plate carrying peripheral teeth parallel to the rotor axis separated by individual spaces, with the spaces between the teeth on one cheek plate being opposite the teeth on the other cheek plate and the ends of the teeth on the two cheek plates lyiNg in parallel axially spaced planes, said machine also comprising a rotor winding mounted between the two cheek plates around the magnetic core and supported by a cover attached to the stator by means having a thickness less than the gap between the two planes in which the ends of the rotor teeth lie, the improvement according to which the means attaching the cover of the rotor to the stator are radial tabs regularly spaced about the periphery of the cover and the outer ends of the tabs extend into certain of the slots in the stator.

Claim 2

Dependent Claim 173 words

In a rotary electric machine comprising a stator winding, a stator slotted to receive said winding and a rotor comprising two coaxial magnetic cheek plates spaced by a coaxial magnetic core, each cheek plate carrying peripheral teeth parallel to the rotor axis separated by individual spaces, with the spaces between the teeth on one cheek plate being opposite the teeth on the other cheek plate and the ends of the teeth on the two cheek plates lyiNg in parallel axially spaced planes, said machine also comprising a rotor winding mounted between the two cheek plates around the magnetic core and supported by a cover attached to the stator by means having a thickness less than the gap between the two planes in which the ends of the rotor teeth lie, the improvement according to which the means attaching the cover of the rotor to the stator are radial tabs regularly spaced about the periphery of the cover and the outer ends of the tabs extend into certain of the slots in the stator.

Claim 3

Dependent Claim 33 words

A machine as claimed in claim 1 essentially characterized by the fact that the two cheek plates are identical and their teeth are trapezoidal in form as are the spaces between consecutive teeth.

Claim 4

Dependent Claim 27 words

A machine as claimed in claim 1 essentially characterized by the fact that the tabs connecting the winding cover to the stator comprise ridges increasing their section.

Claim 5

Dependent Claim 32 words

A machine as claimed in claim 1 essentially characterized by the fact that the tabs of the rotor winding cover terminate in prongs seated in certain of the slots in the stator.

Claim 6

Dependent Claim 147 words

Method of assembling an electrical machine as claimed in claim 4 in which the stator and the cover of the rotor winding are equipped with attaching tabs, and prongs at the tip of said tabs, said method comprising the steps of mounting the rotor winding and its cover in the stator by sliding said prongs into slots in the stator until they reach a predetermined position abutting at least one stop in said stator, impregnating the stator winding with a synthetic resin in order to fasten the wires of this winding and the attaching tabs together, fastening the two cheek plates of the rotor to the magnetic core, positioning the resulting rotor around the rotor winding which has been attached to the stator, and introducing the rotor shaft into the central bore of the cheek plates, into the core and into two bearings in the stator housing.

Claim 7

Dependent Claim 23 words

Machine as claimed in claim 4 essentially characterized by the fact that the prongs have a slightly trapezoidal section in the axial plane.

Claim 8

Dependent Claim 24 words

Machine as claimed in claim 4 essentially characterized by the fact that the rotor winding cover is made from a molding of nonmagnetic material.

Claim 9

Dependent Claim 61 words

Machine as claimed in claim 4 essentially characterized by the fact that the rotor winding cover is a box composed of two identical circular parts, each of which carries half of said tabs, which parts are attached together by engaging a contact surface on each tab of one part with a corresponding contact surface on a tab of the other part.

Claim 10

Dependent Claim 63 words

A machine as claimed in claim 8 essentially characterized by the fact that the substantially radial tabs of each half of the cover form a slight angle to the perpendicular to the axis of the box which passes through the foot of the tab in question each tab being attached at its end to a half hooking tab which is perpendicular to it.

Claim 11

Dependent Claim 54 words

Machine as claimed in claim 8 in which the tabs of the rotor winding cover are radial and perpendicular to the axis of the cover and comprise contact zones at a slight angle to the median plane of the cover, each tab being attached at one end to a prong perpendicular to said tab.

Claim 12

Dependent Claim 90 words

Machine as claimed in claim 4 in which the rotor winding cover is made in one piece and comprises an annular ring coaxial with the rotor, which ring is fastened to a lateral flange perpendicular to the axis of the rotor, said flange being radially notched to permit the passage of wires for connection to the winding of the rotor, the radial tabs with which the cover is provided being fast to the annular ring and carrying at their end prongs which are parallel to the axis of the cover.

Claim 13

Dependent Claim 35 words

Machine as claimed in claim 11 in which the radial tabs of the cover are connected to each other by reinforcing webs and are provided with reinforcing webs parallel to the axis of the cover.

Claim 14

Dependent Claim 47 words

Machine as claimed in claim 11 in which the annular ring of the cover is slotted in alignment with the notch in the flange of the cover and the web between the adjacent tabs is recessed to admit wires for connection to the winding of the rotor.

Claim 15

Dependent Claim 78 words

Machine as claimed in claim 4 in which the rotor winding cover is made in two parts, each part being equipped with radial tabs and each tab terminating in a prong parallel to the axis of the cover and fastened at its midpoint to the corresponding tab, said prongs being seated in certain slots in the stator, and the tabs of one of the cover halves being angularly spaced with respect to the tabs of the other half.

Claim 16

Dependent Claim 115 words

Machine as claimed in claim 4 in which the cover of the rotor comprises several independent concave sectors having a U-shaped section of a depth substantially equal to the thickness of the winding, said sectors being mounted alternately on opposite sides of the winding and each being provided with at least one radial tab on its circumferential exterior lying substantially in its median plane, each tab terminating in a prong parallel to the axis of the corresponding sector and preferably attached to its center to the tab which supports it, the prongs being seated in certain of the slots in the stator so that the tabs are located in the median plane of the stator.

Claim 17

Dependent Claim 96 words

Machine as claimed in claim 4 in which the rotor winding cover consists of a circular box having a U-shaped section substantially equal in depth to the axial thickness of the winding, the rotor winding being positioned inside the annular space defined by said box, said box carrying on its external periphery a plurality of radial tabs, each of which carries a prong parallel to the axis of the cover, said prongs being seated in certain of the slots of the stator so that the tabs are positioned substantially in the median plane of the stator.

Claim 18

Dependent Claim 92 words

Machine as claimed in claim 4 in which the rotor winding cover is made of several strips which encircle the ring forming said winding, the ends of said strips being bent perpendicularly to the outer surface of the ring formed by the winding at a position near the median plane thereof so as to each form a radial tab, which tab is then folded at right angles to provide at each end of the strip a hook parallel to the axis of the winding, each hook being a slot in the stator.

Claim 19

Dependent Claim 43 words

Machine as claimed in claim 17 in which the bent back ends of the strip which form the cover for the rotor winding are situated on opposite sides of the median plane of the winding, each strip being independent of the adjacent strip.

Claim 20

Dependent Claim 56 words

Machine as claimed in claim 17 in which the tabs formed at the ends of the strips from which the rotor winding cover is made extend across the median plane of the winding and serves as hooks by crossing the tabs at ends of at least one adjacent strip, said strips being independent of each other.

Claim 21

Dependent Claim 24 words

Machine as claimed in claim 17 essentially characterized by the fact that the strips comprising the rotor cover are connected together by circumferential rings.

Claim 22

Dependent Claim 23 words

Machine as claimed in claim 17 in which the strips of which the rotor cover is made are molded around the rotor winding.

Claim 23

Dependent Claim 54 words

Machine as claimed in claim 4 in which the winding of the rotor comprises two parts wound in the same direction, and the cover for these two parts comprises a central plate carrying peripheral mounting means which cooperate with the stator and two hollow annular seats, each seat containing one of the winding halves.

Claim 24

Dependent Claim 38 words

Machine as claimed in claim 17 in which the mounting means at the periphery of the central plate consist of radial tabs carrying at their ends prongs which are parallel to the axis of the rotor winding cover.

Claim 25

Dependent Claim 52 words

Machine as claimed in claim 17 in which the mounting means at the periphery of the central plate consists of radial mounting tabs which carry at their ends a hook formed by bending the tab at right angles, two consecutive tabs carrying hooks which extend in opposite directions from the central plate.

Claim 26

Dependent Claim 35 words

Machine as claimed in claim 1 in which the means by which the rotor winding cover is attached to the stator comprises tabs which are held in slots in the stator by means of wedges.

Claim 27

Dependent Claim 71 words

Machine as claimed in claim 25 in which the rotor winding cover consists of a box carrying projections on its external circumference substantially in its median plane projections, the end width of said projections being slightly greater than the distance between two pole shoes of the stator, said projections having a central arcuate portion and being angularly spaced by a distance equal to the pitch between the slots of the stator.

Claim 28

Dependent Claim 63 words

Machine as claimed in claim 26 in which the attaching means carried by the central plate are projections provided with a central arcuate portion, the ends of said projections being slightly wider than the space between two consecutive stator pole shoes, and said projections being spaced one from the other by a distance equal to the pitch between the notches of the stator.

Claim 29

Dependent Claim 85 words

Machine as claimed in claim 25 in which the cover for the rotor winding is made of two halves which receive the rotor winding, each box half comprising in the zone in which it comes in contact with the other box half a flat annular plate perpendicular to the axis of the box and carrying on its periphery regularly spaced attaching tabs having a curved section, said curved sections being so positioned that their concavities face each other when the two box halves are assembled.

Claim 30

Dependent Claim 97 words

Machine as claimed in claim 25 in which the cover for the rotor winding is provided at its periphery with radial fastening tabs spaced one from the other by an angular distance which is a multiple of the polar pitch of the stator and which have a thickness less than the width of the notches of the stator, said radial tabs abutting an element fixed to the stator, which element has a face near the median plane of the stator, and said machine comprising radial tabs wedge means which retain said tabs in abutment with said element.

Claim 31

Dependent Claim 79 words

Machine as claimed in claim 29 in which the radial tabs of the rotor winding cover abut a first series of wedges which are preferably nonmagnetic and fixed within the notches of the stator and that the tabs are radially retained in position against said wedges by means of a second series of wedges which close the zone of the slots through which the radial tabs are introduced to bring them into abutment with the first series of wedges.

Claim 32

Dependent Claim 71 words

Machine as claimed in claim 29 in which the stator consists of a stack of laminations, and one lamination in said stack situated substantially in the median plane of the stator has smaller slots so that the radial tabs of the stator winding cover abut projections formed in the stator slots by the said one lamination and the radial tabs are retained in position against said lamination by means of wedges.

Claim 33

Dependent Claim 97 words

Machine as claimed in claim 29 essentially characterized by the fact that the stator consists of a stack of laminations, and one of these laminations lying substantially in the median plane of the stator is shaped to define a recess in one side of at least one notch, said recess having a depth less than the depth of the pole shoes, and the thickness of said one lamination being substantially equal to the thickness of the radial tabs of the rotor winding cover, and said tabs are seated in said recesses and retained in position by wedges.

Claim 34

Dependent Claim 61 words

Machine as claimed in claim 1 in which the poles of the stator have in a section perpendicular to the axis of said stator an accentuated trapezoidal shape and conventional pole shoes, but having a width at their bases between 40 percent and 70 percent of the width of the bases of the poles of a conventional type of stator pole.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1974-10-04	1975-04-05	1975-10-05	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1978-10-04	1979-04-05	1979-10-05	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1982-10-04	1983-04-05	1983-10-05	$7700.00	Window Closed / Lapsed

Alternator having stationary primary and secondary windings

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