A control apparatus is provided for controlling drive of a rotating electric machine that has coils of two or more phases. The control apparatus includes a first inverter to be connected with first ends of the coils, a second inverter to be connected with second ends of the coils, and a controller. The first inverter has a plurality of first switching elements each corresponding to one of the coils. The second inverter has a plurality of second switching elements each corresponding to one of the coils. The controller includes a first operation circuit configured to generate a first control signal for control of the first inverter and a second operation circuit configured to generate a second control signal for control of the second inverter. Moreover, the control apparatus is configured so that switching timings are synchronized, based on synchronization information, between the first and second inverters.

A process for making a continuous bar winding (4) for an electric machine is described, comprising: a) a step of providing a template (10) having a template axis (X) and a circular array of slots (11) extended about said template axis (X), said circular array of slots having a number of slots equal to a number of slots of the stator or of the rotor of said electric machine, each slot (11) of said circular array having a first and a second open end face (11A, 11B) which are axially spaced from one another and a third open end face (11C), said third face (11C) being a longitudinal face extended between said first and second end faces (11A, 11B) b) a step of providing a conductive bar (20); c) a step of locking a locking portion (21) of said conductive bar; d) a step of inserting the conductive bar (20) into the slots (11) of said array and shaping the conductive bar (20) so that such conductive bar (20) repeatedly passes through the slots (11) of said array from the side of the first open end faces (11A) to the side of the second open end faces (11B) and vice versa, so that said bar (20) has a plurality of bar portions (20B, 20E, 20H) received in the slots (11) of said array and a plurality of connecting portions (20C, 20D; 20F, 20G) projecting beyond said first and second open end faces (11A, 11B), each of said connecting portions joining a pair of said bar portions (20B, 20E, 20H) received in the slots (11) of said array; in which said step d) comprises: d1) an operation of inserting a first bar portion (20B) of said plurality of bar portions into a respective slot (11) of said circular array of slots (11) through said third face (11C) of such slot (11); d2) an operation of shaping a first connecting portion (20C, 20D) of said plurality of connecting portions (20C, 20D; 20F, 20G); d3) an operation of inserting a second bar portion (20E) of said plurality of bar portions (20B, 20E, 20H) into a further slot (11) of said array, different from the slot (11) into which said first bar portion (20B) has been inserted, through said third face (11C) of the further slot (11); in which said first connecting portion (20C, 20D) joins said first and second bar portions (20B, 20E) projecting beyond the second end faces (11B) of the slots (11) in which said fi

A segment coil forming apparatus is a segment coil forming apparatus for forming a segment coil from a wire rod, the segment coil including a projection portion, shoulder portions provided in both side portions of the projection portion, and end portions extending from the shoulder portions in a direction reverse to a direction where the projection portion projects. The segment coil forming apparatus includes: a first forming die including a first projection forming portion corresponding to the shape of the projection portion; and a second forming die including a second projection forming portion corresponding to the shape of the projection portion.

Provided is a method for manufacturing a coil enabling mass-production of good-quality coils that have an enhanced space factor in a core and enhanced heat dissipation performance and that are free from deterioration in properties due to cutting and welding.

A method for manufacturing a coil includes: a step of preparing a plurality of strip-shaped flat conductors which can constitute a helical structure body when the flat conductors are continuously joined; a welding step of forming the helical structure body by butting and pressing one end face of one of the flat conductors in a strip longitudinal direction and one end face of another one of the flat conductors in the strip longitudinal direction; an annealing step of the helical structure body); an insulation step of the helical structure body; and a molding step of forming the helical structure body into a desired shape.

There is disclosed a method for manufacturing a stator for a rotary electric machine including: a process of abutting, on each other, tip end parts (40 of one coil piece (52) and an other one coil piece (52) for forming a stator coil (24) of a rotary electric machine (1); and a welding process of irradiating a welding target location regarding the tip end part having been abutted with a laser beam (110) having a wavelength of 0.6 .Math.m or less, in which an output distribution at a focal point of the laser beam has a flat center part.

The disclosed embodiments describe a tapped winding stator for use in an electric motor. In some embodiments, the electric motor includes a stator body. In some embodiments, a plurality of teeth that are adjacent in a circumferential direction. In some embodiments, a plurality of slots are formed between the plurality of teeth. In some embodiments, a plurality of coils are mounted in each of the plurality of slots. In some embodiments, the plurality of coils are tapped in a configuration that allows the stator to selectively bypass one or more of the plurality of coils in operation. A plurality of switches are electrically coupled between the configuration and a respective phase supply to the electric motor, each of the switches having at least a first position and a second position.

A busbar unit includes: three-phase busbars connected to three-phase coils; and three-phase external terminals that are members different from the three-phase busbars, the three-phase external terminals being connected to the three-phase busbars and electrically connected to a power supply source. Each of the three-phase external terminals includes: a terminal body portion; a busbar-side connection portion connected to a busbar of one phase from among the three-phase busbars; and a power-supply-source-side connection portion electrically connected to the power supply source. At least two terminals among the three-phase external terminals are different in length of a conduction path through which a current flows between the busbar-side connection portion and the power-supply-source-side connection portion in the terminal body portion.

A coil is configured with stacked n turns (where n is an integer of 2 or more) of spirally wound conductive wire having a rectangular cross-section. A k-th turn (where k is an integer and 1≤k≤n) of the coil has at least a straight portion and a corner portion extending from an end part of the straight portion. On an outer peripheral surface of the corner portion, there are formed at least a first bent portion bent toward an inner peripheral side and a second bent portion bent toward the outer peripheral side, and curvature C1 of the first bent portion is different from curvature C2 of second bent portion.

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.

An electric propulsion assembly for an electric aircraft propulsor including an integrated stator assembly including a mandrel having an outer cylindrical surface, an inner cylindrical surface, an upper edge, and a lower edge, the mandrel includes a plurality of electrically insulating guide walls disposed on at least a portion of the outer cylindrical surface and at least a portion of the inner cylindrical surface, wherein the electrically insulating guide wall forms a path across the outer and inner cylindrical surfaces. Assembly includes a plurality of copper windings wound upon the mandrel, electrically insulating epoxy, wherein the epoxy envelops at least a portion of the plurality of copper windings, a first cylindrical surface facing the inner cylindrical surface including a permanent magnet array, a second cylindrical surface facing the outer cylindrical surface including a back iron and a void disposed between the first cylindrical surface and the second cylindrical surface.