Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
1999-06-18
2002-05-28
Enad, Elvin (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S254100, C310S256000, C310S256000, C310S215000, C310S216055, C310S216055
Reexamination Certificate
active
06396187
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a laminated magnetic core for rotating electric machines and a rotating electric machine comprising such laminated magnetic core.
The machine is in the first place intended as a generator in a power station for generating electric power.
The invention is applicable to rotating electric machines such as synchronous machines and normal asynchronous machines. The invention is also applicable to other electric machines such as dual-fed machines and applications in synchronous static current converter cascades, outerpole machines and synchronous flow machines provided their windings are manufactured with insulating electric conductors, and preferably for high voltages. High voltages shall be understood here to mean electric voltages in excess of 10 kV.
BACKGROUND ART
Similar machines have conventionally been designed for voltages in the range 15-30 kV, and 30 kV has normally been considered to be an upper limit. This usually means that a generator must be connected to the power network via a transformer which steps up the voltage to the level of the power network—in the range of approximately 130-400 kV.
A machine which can operate at higher power levels and which can be directly connected to a power network is known from PCT/SE97/00874.
The laminations in laminated stator cores (laminated magnetic cores) for large electric machines are normally laid one by one with overlap in such a way that grooves in the laminations match facing surfaces in the dovetail-shaped wedge of the stator frame. (See
FIG. 2.
) To enable the lamination to assume its position it is bent sufficiently for the dovetail-shaped groove part to pass the surface of the dovetail-shaped wedge. This method of manufacture is relatively complicated, time-consuming and thus expensive.
SUMMARY OF THE INVENTION
The object of the present invention is to solve the problems mentioned above. This is achieved with a laminated magnetic core for rotating electric machines as defined in claim
1
, and a rotating electric machine comprising a laminated magnetic core of the type described above as defined in claim
10
. The laminated magnetic core according to the present invention comprises a number of stack members, each consisting of a number of sheets of metal joined together. Each stack member is provided with two identical grooves arranged to cooperate with wedge members designed to join the stack members together. Each wedge member has two protrusions arranged symmetrically in relation to the longitudinal axis of the wedge member. Each groove in the stack member has at least one part shaped to fit said protrusion. The stack members in the laminated magnetic core are stacked on and partially overlapping each other to form different layers of stack members, the grooves in the stack members in the various layers being arranged substantially opposite each other. The wedge members are arranged in the grooves with a protrusion abutting the complementary shape of the groove in such a manner that the stack members in one layer are secured counter-clockwise in tangential direction and that the stack members in at least one of the adjacent layers are secured clockwise in tangential direction. The laminated magnetic core also includes locking members arranged at least at the transition between layers secured clockwise and layers secured counter-clockwise in order to prevent tangential movement between the different layers.
The above-mentioned laminated magnetic core according to the present invention is easy and quick to manufacture. It is thus also relatively inexpensive to manufacture.
REFERENCES:
patent: 681800 (1901-09-01), Lasche
patent: 847008 (1907-03-01), Kitsee
patent: 1304451 (1919-05-01), Burnham
patent: 1418856 (1922-06-01), Williamson
patent: 1481585 (1924-01-01), Beard
patent: 1508456 (1924-09-01), Lenz
patent: 1728915 (1929-09-01), Blankenship et al.
patent: 1742985 (1930-01-01), Burnham
patent: 1747507 (1930-02-01), George
patent: 1756672 (1930-04-01), Barr
patent: 1762775 (1930-06-01), Ganz
patent: 1781308 (1930-11-01), Vos
patent: 1861182 (1932-05-01), Hendey et al.
patent: 1904885 (1933-04-01), Seeley
patent: 1974406 (1934-09-01), Apple et al.
patent: 2006170 (1935-06-01), Juhlin
patent: 2206856 (1940-07-01), Shearer
patent: 2217430 (1940-10-01), Baudry
patent: 2241832 (1941-05-01), Wahlquist
patent: 2251291 (1941-08-01), Reichelt
patent: 2256897 (1941-09-01), Davidson et al.
patent: 2295415 (1942-09-01), Monroe
patent: 2409893 (1946-10-01), Pendleton et al.
patent: 2415652 (1947-02-01), Norton
patent: 2424443 (1947-07-01), Evans
patent: 2436306 (1948-02-01), Johnson
patent: 2446999 (1948-08-01), Camilli
patent: 2459322 (1949-01-01), Johnston
patent: 2462651 (1949-02-01), Lord
patent: 2498238 (1950-02-01), Berberich et al.
patent: 2650350 (1953-08-01), Heath
patent: 2721905 (1955-10-01), Monroe
patent: 2749456 (1956-06-01), Luenberger
patent: 2780771 (1957-02-01), Lee
patent: 2846599 (1958-08-01), McAdam
patent: 2885581 (1959-05-01), Pileggi
patent: 2943242 (1960-06-01), Schaschl et al.
patent: 2947957 (1960-08-01), Spindler
patent: 2959699 (1960-11-01), Smith et al.
patent: 2962679 (1960-11-01), Stratton
patent: 2975309 (1961-03-01), Seidner
patent: 3014139 (1961-12-01), Shildneck
patent: 3098893 (1963-07-01), Pringle et al.
patent: 3130335 (1964-04-01), Rejda
patent: 3143269 (1964-08-01), Eldik
patent: 3157806 (1964-11-01), Wiedemann
patent: 3158770 (1964-11-01), Coggeshall et al.
patent: 3197723 (1965-07-01), Dortort
patent: 3268766 (1966-08-01), Amos
patent: 3304599 (1967-02-01), Nordin
patent: 3354331 (1967-11-01), Broeker et al.
patent: 3365657 (1968-01-01), Webb
patent: 3372283 (1968-03-01), Jaecklin
patent: 3392779 (1968-07-01), Tilbrook
patent: 3411027 (1968-11-01), Rosenberg
patent: 3418530 (1968-12-01), Cheever
patent: 3435262 (1969-03-01), Bennett et al.
patent: 3437858 (1969-04-01), White
patent: 3444407 (1969-05-01), Yates
patent: 3447002 (1969-05-01), Ronnevig
patent: 3484690 (1969-12-01), Wald
patent: 3541221 (1970-11-01), Aupoix et al.
patent: 3560777 (1971-02-01), Moeller
patent: 3571690 (1971-03-01), Lataisa
patent: 3593123 (1971-07-01), Wiliamson
patent: 3631519 (1971-12-01), Salahshourian
patent: 3644662 (1972-02-01), Salahshourian
patent: 3651244 (1972-03-01), Silver et al.
patent: 3651402 (1972-03-01), Leffmann
patent: 3660721 (1972-05-01), Baird
patent: 3666876 (1972-05-01), Forster
patent: 3670192 (1972-06-01), Andersson et al.
patent: 3675056 (1972-07-01), Lenz
patent: 3684821 (1972-08-01), Miyauchi et al.
patent: 3684906 (1972-08-01), Lexz
patent: 3699238 (1972-10-01), Hansen et al.
patent: 3708707 (1973-01-01), Kranz
patent: 3716652 (1973-02-01), Lusk et al.
patent: 3716719 (1973-02-01), Angelery et al.
patent: 3727085 (1973-04-01), Goetz et al.
patent: 3740600 (1973-06-01), Turley
patent: 3743867 (1973-07-01), Smith, Jr.
patent: 3746954 (1973-07-01), Myles et al.
patent: 3758699 (1973-09-01), Lusk et al.
patent: 3778891 (1973-12-01), Amasino et al.
patent: 3781739 (1973-12-01), Meyer
patent: 3787607 (1974-01-01), Schlafly
patent: 3792399 (1974-02-01), McLyman
patent: 3801843 (1974-04-01), Corman et al.
patent: 3809933 (1974-05-01), Sugawara et al.
patent: 3813764 (1974-06-01), Tanaka et al.
patent: 3828115 (1974-08-01), Hvizd, Jr.
patent: 3881647 (1975-05-01), Wolfe
patent: 3884154 (1975-05-01), Marten
patent: 3891880 (1975-06-01), Britsch
patent: 3902000 (1975-08-01), Forsyth et al.
patent: 3912957 (1975-10-01), Reynolds
patent: 3932779 (1976-01-01), Madsen
patent: 3932791 (1976-01-01), Oswald
patent: 3943392 (1976-03-01), Keuper et al.
patent: 3947278 (1976-03-01), Youtsey
patent: 3965408 (1976-06-01), Higuchi et al.
patent: 3968388 (1976-07-01), Lambrecht et al.
patent: 3971543 (1976-07-01), Shanahan
patent: 3974314 (1976-08-01), Fuchs
patent: 3993860 (1976-11-01), Snow et al.
patent: 3995785 (1976-12-01), Arick et al.
patent: 4001616 (1977-01-01), Lonseth et al.
patent: 4008367 (1977-02-01), Sunderhauf
patent: 4008409 (1977-02-01), Rhudy et al.
patent: 4031310 (1977-06-01), Jachimowicz
patent: 4039740 (1977-08-01), Iwata
patent: 404
Asea Brown Boveri AB
Dykema Gossett PLLC
Enad Elvin
LandOfFree
Laminated magnetic core for electric machines does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Laminated magnetic core for electric machines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laminated magnetic core for electric machines will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2869659