Abstract A closed slot stator construction for stepper motors and method of fabricating the same. The method involves utilizing a tubular member. Axial slots are milled in the outside surface of the tube. Preformed stator teeth are then assembled by edges inserted into the axial slots with the teeth positioned radially. The interior of the tube is then milled, exposing the inner edges of the teeth. Windings are then placed between these stator teeth or wound on them by machine. The assembly is then press fitted into a magnetic sleeve which forms the housing. In a modified form of the invention, the stator is formed by insertion of stamped stator teeth into a sintered metal or plastic mold with the holding cylinder cast around the radially positioned teeth, thus, eliminating soldering.
A method of construction of an unlaminated motor stator comprising the steps of: forming individual, unlaminated stator teeth; forming a ring shaped member As a tubular member, milling equally angularly spaced axial slots on the outside of the tubular member, inserting the teeth into said slots and permanently securing them to the tubular member; milling out the inside of the tubular member to expose the inner ends of the teeth and render them flush with the milled inner surface of the tubular member; applying windings in a position to occupy spaces between radially positioned teeth; and applying a magnetic, cylindrical member around the radially positioned teeth and in contact with them.
Claim 2
Independent Claim
111 words
A method of construction of an unlaminated motor stator comprising the steps of: forming individual, unlaminated stator teeth; forming a ring shaped member As a tubular member, milling equally angularly spaced axial slots on the outside of the tubular member, inserting the teeth into said slots and permanently securing them to the tubular member; milling out the inside of the tubular member to expose the inner ends of the teeth and render them flush with the milled inner surface of the tubular member; applying windings in a position to occupy spaces between radially positioned teeth; and applying a magnetic, cylindrical member around the radially positioned teeth and in contact with them.
Claim 3
Dependent Claim
17 words
A method as in claim 1, including the step of soldering the teeth to the tubular member.