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US 5,289,151 AGranted
Electrical coils
AssigneeBritish Technology Group Limited
InventorRobert Turner
Life of this patent
Estimating the term…
Abstract
A method of designing a coil or set of coils to achieve a coil with minimum or substantially minimum inductance to produce a desired magnetic field.
Claims11
A solenoid coil in which the inductance L of the coil is defined by the expression:
- ##EQU20## wherein I is the current in each turn of the coil and in which the coil comprises a set of discrete wire arc each arc being placed along an equally spaced contour of the stream function in such a position that it carries the surface current from the areas on either side of it, the surface current density being defined by the expression ##EQU21##
A coil assembly comprising:
- at least one coil having conductors which are positioned on at least one coaxial cylinder or parallel plane such that its conductors have minimum inductance based on a predetermined field, per unit current, at a predetermined finite set of specified points.
A method of forming a coil or a set of coils, comprising:
- determining a current density which provides a minimum inductance consistent with generating a given field, per unit current, at a finite set of specified points on coaxial cylinders or parallel planes;
- using said condition of minimum inductance to determine positions of conductors of the coil on said coaxial cylinders or parallel planes;
- and
- supplying the coil or set of coils with a predetermined current to produce the given field per unit current at a finite set of specified points.
1 more element
A method of forming a coil or set of coils comprising the steps of:
- specifying a desired magnetic field per unit of applied electrical current at a finite set of points specified in space, and a set of one or more coaxial cylinders or parallel planes on which the coil is to be formed;
- and
- evaluating a unique current density distribution on the specified coaxial cylinders or parallel planes required to generate this specified field at the specified points, which has a minimum inductance consistent with generating the specified field at the specified points;
- and
- positioning conductors on the coaxial cylinders or planes in a coil configuration which provides, when energized, substantially the said unique current density distribution.
2 more elements
Dependencies are inferred from the claim text.