Electrical generator or motor structure – Dynamoelectric – Linear
Patent
1991-05-24
1993-03-30
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Linear
310 49R, 310181, H02K 4102, H02K 3704, H02K 117
Patent
active
051987112
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a motor and, in particular, to a motor for raising and lowering lift cars in a lift well.
The invention may be said to reside in a motor comprising a first member having a plurality of stepped portions in at least one surface, a plurality of second members spaced along said first member, said second members each having at least one surface provided with stepped portions which oppose the surface of the first member having the stepped portions, each of said second portions having a permanent magnet and a member providing a flux path joining said magnets.
Preferably said first member comprises a ring shaped member with stepped portions being provided on inner and outer surfaces of said ring shaped member.
Preferably said plurality of second members comprise generally C-shaped members comprised of two side members and a cross piece, with stepped portions provided on inner surfaces of the side members, an inner surface of one of the side members of each said second member being opposed to the inner side of the ring and an inner surface of the other side member of each second member being opposed to the outer side of said ring.
Preferably said permanent magnets are arranged on the surface of said cross member of said second portions remote from said first member. In other embodiments the magnet could be arranged on one of the outer surfaces of the sides of the cores.
Preferably the magnets of adjacent said second members are arranged such that their poles are opposite to one another.
Preferably the spatial or phase relationship between stepped portions on one of said second members and the stepped portions on said first member is different to the spatial or phase relationship between stepped portions on another of said second members and the stepped portions on said first member.
Most preferably a first spatial or phase relationship between stepped portions on one surface of said one second member and the stepped portions on the first member are the same as the spatial or phase relationship between the stepped portions on one surface of said another of the second members and the stepped portions on said first member and wherein a second spatial or phase relationship between stepped portions on another surface of said one second member and the stepped portions on the first member are the same as the spatial or phased relationship between stepped portions on another surface of said another of said second members and the first member and wherein the first said phase relationship is different to the second said phase relationship.
In one embodiment of the invention the flux path means which joins the permanent magnets may comprise a metallic ring, preferably formed from steel. In this embodiment of the invention a plurality of windings, each of different phase would be required in order to power the motor.
In another embodiment of the invention the flux path means could be provided with a second motor which is supported on said plurality of magnets and which is substantially identical to the said motor. In this embodiment of the invention only a single phase winding will be required for each motor.
A preferred embodiment of the invention will be described by way of example in more detail with reference to the accompanying drawings in which:
FIG. 1 is a view of part of a motor embodying the invention; and
FIG. 2 is a view along the line 2--2 of FIG. 1.
With reference to the drawings, the motor 10 comprises a first portion 12 which is preferably in the form of a ring. The ring 12 has an inner surface 14, an outer surface 16, an upper side 18 and a lower side 20. The inner and outer surfaces 14 and 16 are provided with a plurality of stepped portions 25a and 25b which are generally in the form of raised portions and grooves respectively, thereby creating arrays of teeth on the surfaces 14 and 16. Preferably the ring 12 is a laminated ring and the stepped portions 25a and 25b formed in each lamination. The laminations could be separate metal rings or formed by a helix or spiral metal strip. A p
REFERENCES:
patent: 3706922 (1972-12-01), Inagaki
patent: 3750151 (1973-07-01), Dill
patent: 3757147 (1973-09-01), Lyman, Jr.
patent: 3809990 (1974-05-01), Kuo et al.
patent: 3864588 (1975-02-01), Inaba
patent: 4528483 (1985-07-01), Muller
patent: 4661735 (1987-04-01), Miki et al.
patent: 4703242 (1987-10-01), Ettelman et al.
patent: 4707642 (1987-11-01), Sorimachi et al.
patent: 4714849 (1987-12-01), Yamamoto et al.
patent: 4803387 (1989-02-01), Seider
patent: 4857786 (1989-08-01), Nihei et al.
patent: 4922145 (1990-05-01), Shtipelman
patent: 4972108 (1990-11-01), Venturini
Eastham et al., Linear Induction Motor as Electromagnetic Rivers, Proc. IEE, 121, (10), pp. 1099-1108.
Laithwaite et al., Linear-Motion Electrical Machines, IEEE, vol. 58, Apr. 1970, pp. 531-542.
Boral Johns Perry Industries Pty. Ltd.
La Balle C.
Stephan Steven L.
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