Stator in an electric motor and method for manufacturing the stator
AssigneeBühler Motor GmbH
InventorsJürgen Brettschneider, Richard Guttenberger
Life of this patent
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Abstract
A stator in an electric motor and to a method for producing the stator in which a plurality of individual coils are wound on laminated stator poles and are provided with an insulation, wherein the insulation bears connection contacts for bringing the individual coils into contact with a printed circuit board, wherein the connection contacts are press-fitted into the printed circuit board. The present stator provides for a compact size and for simple and economical joining processes. In a preferred embodiment, the electric motor is a dosing pump motor for drug delivery systems.
Claims20
A stator in an electric motor, the stator comprising;
- a plurality of laminated stator pole cores having first and second ends;
- a printed circuit board with contact recesses;
- a plurality of individual coils, each coil being wound on one of the laminated stator pole cores;
- first insulation caps provided at the first end of each stator pole core;
- second insulation caps provided at the second end of each stator pole core;
- terminal connection contacts provided on the first insulation caps for bringing the individual coils into contact with the printed circuit board, wherein the connection contacts are press-fitted into the contact recesses of the printed circuit board, so that the length tolerance between the first axial end of a stator pole core and one end of the associated terminal contact at the second axial end of the stator pole core is substantially less than the length tolerance of the stator pole core.
A method for making a stator (1) in an electric motor with a plurality of individual coils wound on laminated stator pole cores provided with an insulation, wherein the insulation bears terminal contacts for bringing the individual coils into contact with a printed circuit board, wherein the terminal contacts are press-fitted into the printed circuit board, the method comprising the steps of:
- a) providing a plurality of stator pole cores;
- b) providing first insulating caps positively connected by a baffle,
- c) providing second insulating caps interconnected by a retaining element;
- d) joining the first and second insulating caps with the stator pole cores to a mounting assembly;
- e) winding the insulated stator pole cores with single pole windings and bringing the wire ends into contact with the baffle;
- f) separating retaining regions of the baffle and shearing press-fit regions;
- g) separating the retaining element from the mounting assembly;
- h) rounding the wound stator;
- i) press-fitting the stator into a housing;
- and
- k) joining the printed circuit board in the housing and pressing the circuit board via the terminal contacts.
A method for making a stator in an electric motor with a plurality of individual coils wound on laminated stator pole cores provided with an insulation, wherein the insulation bears terminal contacts for bringing the individual coils into contact with a printed circuit board, wherein the terminal contacts are press-fitted into the printed circuit board, the method comprising the steps of:
- a) providing a plurality of stator pole cores;
- b) providing first insulating caps positively connected by a baffle;
- c) providing second insulating caps interconnected by a retaining element;
- d) joining the first and second insulating caps with the stator pole cores to a mounting assembly;
- e) winding the insulated stator pole cores with single pole windings and bringing the wire ends into contact with the baffle;
- f) separating retaining regions of the baffle and shearing press-fit regions;
- g) severing the retaining element into several retaining element sections;
- h) rounding the wound stator;
- i) separating the retaining element sections from the mounting assembly;
- j) press-fitting the stator into a housing;
- k) joining the printed circuit board in the housing;
- and
- l) pressing the circuit board via the terminal contacts.
Dependencies are inferred from the claim text.