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US 3,943,391 AGranted
Electromagnetic coupler having an electromagnetic winding
AssigneeSulzer Brothers Limited
InventorHenri Fehr
Life of this patent
Estimating the term…
Abstract
The electromagnetic winding is made up of a plurality of insulated coils which are formed by a wound-up sheet metal strip. The strip is of a material having high magnetic permeability so that the coils eliminate the need for a magnetic core. The coils can be insulated from each other by a wound strip of insulating material such as paper or by means of a synthetic lacquer. The electromagnetic coupler can be of the synchronous or asynchronous type and can be in the form of a clutch or brake.
Claims7
An electromagnetic coupler comprising
- a housing defining part of an excitable magnetic circuit having an air-gap therein and a solid magnetizable core of said circuit;
- a drive shaft rotatably mounted in said housing;
- a rotor fixedly mounted on said shaft;
- a single ring of poles mounted on said rotor and disposed in said air-gap;
- a driven shaft spaced from said first shaft;
- a second rotor fixedly mounted on said driven shaft;
- a single ring of poles mounted on said second rotor and disposed about said first ring of poles;
- a substantially annular excitation winding disposed concentrically about said drive shaft and said core, said winding having a plurality of coils disposed in insulated manner with respect to each other, said coils being of a magnetically highly permeable strip material to form at least a part of said magnetizable core of said magnetic circuit with said winding being magnetizable in a longitudinal direction thereof;
- and
- a non-magnetizable part-winding concentrically about said excitation winding.
7 more elements
An electromagnetic coupler comprising
- a housing defining part of an excitable magnetic circuit having an air-gap therein;
- at least one shaft rotatably mounted in said housing;
- a rotor fixedly mounted on said shaft;
- and
- a plurality of substantially annular excitation windings distributed annularly about said rotor to form at least a part of a ring of poles thereof in said air gap, each said winding being divided into two part-windings with the inner windings having coils disposed in insulated manner with respect to each other, said coils being of a magnetically highly permeable strip material to form at least a part of a magnetizable core of said magnetic circuit with each said winding being magnetizable in a longitudinal direction thereof.
2 more elements
An electromagnetic coupler comprising
- a housing defining part of an excitable magnetic circuit having an air-gap therein;
- a shaft rotatably mounted in said housing;
- a rotor fixedly mounted on said shaft;
- a ring of poles mounted on said rotor and disposed in said air-gap;
- and
- a substantially annular excitation winding disposed concentrically about said shaft, said winding having an inner part-winding and an outer part-winding surrounding said inner part-winding, said outer part winding being made of non-magnetizable highly-conductive material and said inner-part winding being of a magnetically highly permeable strip material to form at least a part of a magnetizable core of said magnetic circuit with said winding being magnetizable in a longitudinal direction thereof.
3 more elements
An electromagnetic coupler comprising
- a housing defining part of an excitable magnetic circuit having an air-gap therein;
- a shaft rotatably mounted in said housing;
- a rotor fixedly mounted on said shaft;
- a ring of poles mounted on said rotor and disposed in said air-gap;
- a substantially annular excitation winding disposed concentrically about said shaft, said winding having a plurality of coils disposed in insulated manner with respect to each other, said coils being of a magnetically highly permeable strip material to form at least a part of a magnetizable core of said magnetic circuit with said winding being magnetizable in a longitudinal direction thereof;
- and
- at least one short-circuit winding on each pole-shoe of a stator formed by said housing.
4 more elements
An electromagnetic coupler comprising
- a housing defining a stator part of an excitable magnetic circuit having an air-gap therein and pole shoes;
- a shaft rotatably mounted in said housing;
- a rotor fixedly mounted on said shaft;
- a ring of poles mounted on said rotor and disposed in said air-gap;
- a substantially annular excitation winding disposed concentrically about said shaft, said winding having a plurality of coils disposed in insulated manner with respect to each other, said coils being of a magnetically highly permeable strip material to form at least a part of a magnetizable core of said magnetic circuit with said winding being magnetizable in a longitudinal direction thereof;
- a driven shaft coaxially spaced from said first shaft;
- a second rotor fixedly mounted on said driven shaft;
- and
- a ring of poles mounted on said second rotor and disposed in said air-gap to divide said air-gap into a three part air-gap with said first ring of poles, and wherein said pole-shoes of said stator formed by said housing have smooth surfaces opposite said air-gap.
6 more elements
An electromagnetic coupler comprising
- a housing defining part of an excitable magnetic circuit having an air-gap therein;
- a shaft rotatably mounted in said housing;
- a rotor fixedly mounted on said shaft;
- a ring of poles mounted on said rotor and disposed in said air-gap;
- a substantially annular excitation winding disposed concentrically about said shaft, said winding having a plurality of coils disposed in insulated manner with respect to each other, said coils being of a magnetically highly permeable strip material to form at least a part of a magnetizable core of said magnetic circuit with said winding being magnetizable in a longitudinal direction thereof;
- and
- a solid piece of magnetically permeable material forming a part of said core.
4 more elements
An electromagnetic coupler comprising
- a housing defining part of an excitable magnetic circuit having an air-gap therein;
- a shaft rotatably mounted in said housing;
- a rotor fixedly mounted on said shaft;
- a ring of poles mounted on said rotor and disposed in said air-gap;
- at least one short-circuit winding mounted in said housing about said ring of poles to define stator poles;
- and
- a substantially annular excitation winding disposed concentrically about said shaft, said winding having a plurality of coils disposed in insulated manner with respect to each other, said coils being of a magnetically highly permeable strip material to form at least a part of a magnetizable core of said magnetic circuit with said winding being magnetizable in a longitudinal direction thereof.
4 more elements
Dependencies are inferred from the claim text.