There are provided a coil unit, a stator member, a motor, and methods of manufacturing these, configured to achieve downsizing and simplified manufacturing steps. The coil unit includes a coil, and a bus bar including a connection end portion to which the coil is connected. One end of the coil and the connection end portion are welded by cold pressure welding with end faces of them being butted in a welded portion.

The disclosure relates to a method for producing a stator, where, for one or both layers of a two-layer winding, a tool with receiving regions is respectively provided on an end face of a laminated core. A relative arrangement of the receiving regions corresponds to a relative end position for conductor ends of the conductor elements. In a positioning process, the tool is moved into a first turning position and each conductor end of a first group of the conductor elements is respectively inserted into one of the receiving regions. Then the tool is turned into at least one further turning position and each conductor end of a further group of the conductor elements is respectively inserted into one of the receiving regions until the conductor ends of all the conductor elements of the layer are in the relative end position in relation to one another.

An object of the invention is to increase productivity of a coil.

A coil forming device according to the present invention includes: a first bending unit 200A that performs a compression bending process with respect to a linear conductor; and a second bending unit 200B that performs a draw bending process with respect to the linear conductor, wherein the first bending unit 200A and the second bending unit 200B are integrated in one device, and wherein the first bending unit 200A and the second bending unit 200B are switched to access one linear conductor so as to perform the compression bending process and the draw bending process onto the one linear conductor.

There is provided an intravascular blood pump for insertion into a patient's heart. The blood pump comprises a slotless permanent magnet motor contained within a housing, the motor having p magnet pole pairs and n phases, where p is an integer greater than zero, and n is an integer 3. The motor comprises a stator extending along a longitudinal axis of the housing and having 2np coils wound to form two coils per phase per magnet pole pair. The stator comprises inner and outer windings each comprising np coils electrically connected such that the current flowing through the coils is in the same direction, the coils of the outer winding arranged on an outer surface of the coils of the inner winding.

A method of manufacturing a compressed coil and a system for holding a wire during the manufacture of a compressed coil are disclosed. The method includes providing a wire including a first lead section, a central section and a second lead section. The central section of the wire is wound around a bobbin to form a coil. A punch top is located over an end of the bobbin such that the end of the bobbin is located at least partially within a through-hole of the punch top. A second lead section of the wire is located within a groove in an outer surface of the punch top or bobbin and pressure is applied to the bobbin and/or punch top to compress the coil.

An object of the invention is to increase productivity of a coil. A coil forming device according to the present invention includes: a first bending unit 200A that performs a compression bending process with respect to a linear conductor; and a second bending unit 200B that performs a draw bending process with respect to the linear conductor, wherein the first bending unit 200A and the second bending unit 200B are integrated in one device, and wherein the first bending unit 200A and the second bending unit 200B are switched to access one linear conductor so as to perform the compression bending process and the draw bending process onto the one linear conductor.

A winding machine (1) for winding coils (4), having at least one coil-body receptacle (2) providing a receiving space (5) for coil bodies to be wound and at least one winding-material feed (3) being configured to feed winding material into the receiving space (5). The at least one coil-body receptacle (2) comprises at least a first and a second receiving unit, wherein, in a first setting, using the first receiving unit, the winding machine (1) allows winding in accordance with a first winding technique and wherein, in a second setting, using the second receiving unit, the winding machine (1) allows winding in accordance with a second winding technique different from the first winding technique. The first and second winding techniques are selected from the group of winding techniques consisting of the coil-winding technique, the conventional needle-winding technique, the linear winding technique and the flyer-winding technique.

A coil manufacturing device for manufacturing a coil by rotating a winding core and winding a wire around the rotating winding core, the coil manufacturing device includes a recess formed in the winding core, the recess being configured to suspend the wire wound around the winding core in the recess; and a wire bundling device configured to bundle the wire suspended in the recess.

A process for assembling a brushless motor-generator includes assembling a rotor formed from two spaced apart rotor portions having magnetic poles that drive magnetic flux circumferentially through the rotor portions and back and forth across an armature airgap formed between the rotor portions. An air core armature is formed by coating a substantially nonmagnetic armature form with a tacky adhesive layer, and winding armature windings into a winding pattern onto the substantially nonmagnetic form using wire made of multiple individually insulated conductor strands that are electrically connected in parallel but are electrically insulated from each other along their length when located inside the armature airgap, wherein the strands of said wire are diametrically held together by an outer serve. The winding of the armature form includes sequentially applying pressure to sections of said wire against the tacky adhesive layer.

An electromechanical rotary actuator includes a stator having teeth extending inwardly from an inner wall surface, wherein free ends of each tooth form an aperture dimensioned for receiving a rotor, the free ends forming a gap therebetween. A segmented set of electrical coils extends around each tooth, wherein each coil of the segmented set has a thickness sufficient for passing through the gap between the first and second teeth. Electrically insulating tabs extend into an opening around each tooth carrying the segmented set of coils. The tabs maintain each of the coils within the segmented set in a spaced relation to the stator. When fabricating the actuator, each of the coils are fabricated and individually placed around a tooth with each coil having a thickness and breadth for optimally packing the stator.