Equipment for welding a motor stator to a substrate includes a protective hood and a hot pressing head. The protective hood covers the motor stator and the substrate to protect the motor stator from undesired displacing and possible damage, and is provided with a plurality of wire slots, via which lead-out wires of coil windings of the motor stator can be pulled out to expose from the protective hood. The hot pressing head has a hot pressing end corresponding to welding points on the substrate and is movable to cover an outer side of the protective hood while the hot pressing end heats and welds the lead-out wires and the welding points together. With the equipment, all the coil windings of the motor stator can be welded to the substrate in one single movement while the motor stator is protected against splattered solders during the welding operation.

A method for welding a motor stator to a substrate includes steps of: providing a motor stator and a substrate; preliminarily fixing the motor stator to the substrate; pulling out lead-out wires of coil windings wound on the motor stator to align with solders of welding points on the substrate; covering a protective hood on the motor stator; covering the hot pressing head around the protective hood while the hot pressing end is located corresponding to the welding points; heating and compressing the welding points to melt the solders; and waiting the molten solders on the welding points to cool and cure to weld the coil windings of the motor stator to the welding points. With the present invention, all the coil windings of the motor stator can be welded to the substrate in one single movement while the motor stator is protected against splattered solders during the welding operation.

A motor may include an insulator, a stator comprising multiple coils wound around the insulator, and a stator cover. The insulator may include a first terminal groove for containing one end of the multiple coils and a second terminal groove for containing the other end of the multiple coils. The stator cover may include a first terminal containing portion coupled to the first terminal groove such that a first wire connecting terminal is disposed therein. The stator cover may include a second terminal containing portion coupled to the second terminal groove such that a second wire connecting terminal is disposed therein. The stator cover may include a power connector including a first end connected to the second wire connecting terminal of the second terminal containing portion, a second end of the power connector being connected to an external power supply so as to apply power to the multiple coils.

A method for forming a dynamoelectric machine including providing a jig, arranging an inner yoke and an outer yoke on the jig, providing concentrically arranged rotor layers between the inner yoke and the outer yoke, filling spaces between adjacent ones of the concentrically arranged rotor layers with a powder which will define stator layers, pressing the powder within the spaces between the adjacent ones of the concentrically arranged rotor layers, and heating, sintering, and/or curing the pressed powder to form the stator layers between the adjacent ones of the concentrically arranged rotor layers.

A method for forming a dynamoelectric machine including providing a jig, arranging an inner yoke and an outer yoke on the jig, providing concentrically arranged rotor layers between the inner yoke and the outer yoke, filling spaces between adjacent ones of the concentrically arranged rotor layers with a powder which will define stator layers, pressing the powder within the spaces between the adjacent ones of the concentrically arranged rotor layers, and heating, sintering, and/or curing the pressed powder to form the stator layers between the adjacent ones of the concentrically arranged rotor layers.

Three-phase windings are wound, with a conductor, around twelve magnetic pole teeth arranged at equal angular intervals on an inner peripheral portion of a stator core configured to constitute a three-phase, twelve-pole stator. The winding of each phase comprises, at least at one location, a portion in which the conductor is drawn out from one of the slots to form a lead-out portion and is then returned to the same slot, and the conductor on both sides of the lead-out portion is fixed within the one slot by the conductor wound around one of the magnetic pole teeth forming the one slot after the lead-out portion has been formed.

A stator for a rotary induction motor with a stator main body, the stator being assigned a geometric machine axis, the stator having stator slots and a stator coil arrangement with a plurality of stator coil strands, which can be connected to a rotary supply voltage at respective phase terminals in order to generate a rotary magnetic field, the stator coil strings each having a bundle with a plurality of conductors, the conductors of a bundle being arranged together to form respective star inductors in the stator slots, and the conductors each having a phase-connection-side portion and a star-point-side portion, the conductors of a bundle being electrically connected to the phase connection of the respective stator coil string via the phase-connection-side portion. The conductors of bundles of different stator coil strings are electrically connected to one another via the star-point-side portion by means of respective star points.

A stator for a rotary induction motor with a stator main body, the stator being assigned a geometric machine axis, the stator having stator slots and a stator coil arrangement with a plurality of stator coil strands, which can be connected to a rotary supply voltage at respective phase terminals in order to generate a rotary magnetic field, the stator coil strings each having a bundle with a plurality of conductors, the conductors of a bundle being arranged together to form respective star inductors in the stator slots, and the conductors each having a phase-connection-side portion and a star-point-side portion, the conductors of a bundle being electrically connected to the phase connection of the respective stator coil string via the phase-connection-side portion. The conductors of bundles of different stator coil strings are electrically connected to one another via the star-point-side portion by means of respective star points.

A stator (1) includes a stator core (10), a coil (20), a conducting portion (60), and an insulating resin (40). The stator core (10) has an annular shape. The coil (20) includes a protruding portion (29) that protrudes to one axial side more than an end portion at the one axial side of the stator core (10). A conducting portion (60) is connected to the protruding portion (29). The insulating resin (40) includes a press-fit groove (50) between the insulating resin (40) and the protruding portion (29). The conducting portion (60) is disposed in a state in which the conducting portion (60) is press-fitted into the press-fit groove (50) and pressed against the protruding portion (29).

A stator (1) includes a stator core (10), a coil (20), a conducting portion (60), and an insulating resin (40). The stator core (10) has an annular shape. The coil (20) includes a protruding portion (29) that protrudes to one axial side more than an end portion at the one axial side of the stator core (10). A conducting portion (60) is connected to the protruding portion (29). The insulating resin (40) includes a press-fit groove (50) between the insulating resin (40) and the protruding portion (29). The conducting portion (60) is disposed in a state in which the conducting portion (60) is press-fitted into the press-fit groove (50) and pressed against the protruding portion (29).