Abstract: A method is disclosed for making an electric motor stator. In accordance with the method, coil groups are inserted for different electrical phases through a first and second ends of a stator core. An insertion tool is used for insertion of the coil groups independently. Coils for individual phases are inserted through the first and second ends, and leads for the coil groups may exit alternative ends as a result of the method.

Abstract: A technique for making a stator for an electric motor or similar machine includes disposing a plurality of concentric coils in a stator core such that leads exit both ends of the stator core. The coils are disposed in accordance with a winding pattern that is particularly suited for making four-pole, three-phase machines. Certain of the coils are disposed singularly within core slots, while other coils share slots with coils of other winding groups. The coils may be inserted by machine, and in several layers by rotating the stator core between each layer insertion.

Abstract: A stator assembly for use in an electromechanical machine includes an improved concentric winding arrangement. Groups of concentric coils are alternately inserted from both ends of the stator core. In other words, a first phase group is inserted from one end. The stator core is then rotated 180° for insertion of the second phase group. Next, the stator core is rotated back to its original position for insertion of the third phase group. The alternating process continues until all phase groups have been inserted. Preferably, the winding pattern utilizes a combination of full slots and shared slots, with full slots of different groups of the same phase being adjacent to one another. The invention permits the use of automated winding equipment in large inductions motors where hand insertion was often required in the past.

Abstract: A technique for making a stator for an electric motor or similar machine includes disposing a plurality of concentric coils in a stator core such that leads exit both ends of the stator core. The coils are disposed in accordance with a winding pattern that is particularly suited for making four-pole, three-phase machines. Certain of the coils are disposed singularly within core slots, while other coils share slots with coils of other winding groups. The coils may be inserted by machine, and in several layers by rotating the stator core between each layer insertion.

Abstract: A winding pattern and technique for a stator of an electric motor is provided. The pattern is particularly well-suited for forming a four-pole, three-phase machine. The winding pattern permits concentric windings to be fully installed in slots of a stator core by machine in multiple steps. The concentric windings include windings which are singularly located within slots, and windings that share slots with other windings. The windings maybe inserted in the core slots by rotation of the core in an insertion station. Leads from the windings exit both ends of the core to facilitate channeling and termination of the windings.

Abstract: Insulating slot liners for insertion into stator core winding slots are formed from a narrow-width reel of insulating material. The width of the material is determined by the inner circumferential surface of the winding slot that must be insulated, instead of being based on the axial length of the stator core as has been the practice in the past. As a result, slot liners may be easily produced for stator cores of different axial lengths by simply adjusting the length of material cut from the reel. Preferably, the cutting mechanism used to cut the length of material is adapted to form a pair of opposed cuffs when the material is cut. An insulator blank formed in this manner is pushed into a die, thereby forming a U-shaped slot liner. A transfer mechanism functions to move the slot liner into a respective winding slot. The slot liner preferably passes through a reduced diameter guideway defined in a guide element as it is moved into the winding slot.

Abstract: A stator assembly for use in an electromechanical machine includes an improved concentric winding arrangement. Groups of concentric coils are alternately inserted from both ends of the stator core. In other words, a first phase group is inserted from one end. The stator core is then rotated 180° for insertion of the second phase group. Next, the stator core is rotated back to its original position for insertion of the third phase group. The alternating process continues until all phase groups have been inserted. Preferably, the winding pattern utilizes a combination of full slots and shared slots, with full slots of different groups of the same phase being adjacent to one another. The invention permits the use of automated winding equipment in large inductions motors where hand insertion was often required in the past.

Abstract: Insulating slot liners for insertion into stator core winding slots are formed from a narrow-width reel of insulating material. The width of the material is determined by the inner circumferential surface of the winding slot that must be insulated, instead of being based on the axial length of the stator core as has been the practice in the past. As a result, slot liners may be easily produced for stator cores of different axial lengths by simply adjusting the length of material cut from the reel. Preferably, the cutting mechanism used to cut the length of material is adapted to form a pair of opposed cuffs when the material is cut. An insulator blank formed in this manner is pushed into a die, thereby forming a U-shaped slot liner. A transfer mechanism functions to move the slot liner into a respective winding slot. The slot liner preferably passes through a reduced diameter guideway defined in a guide element as it is moved into the winding slot.

Abstract: A stator assembly for use in an electromechanical machine includes an improved concentric winding arrangement. Groups of concentric coils are alternately inserted from both ends of the stator core. In other words, a first phase group is inserted from one end. The stator core is then rotated 180° for insertion of the second phase group. Next, the stator core is rotated back to its original position for insertion of the third phase group. The alternating process continues until all phase groups have been inserted. Preferably, the winding pattern utilizes a combination of full slots and shared slots, with full slots of different groups of the same phase being adjacent to one another. The invention permits the use of automated winding equipment in large inductions motors where hand insertion was often required in the past.

Abstract: An assembly for supplying wire from a spool includes a support for holding the spool, a sensor mounted on the support and detachably secured to an end of the spool for detecting supplying of the end of the wire from the spool, and a controller for precluding supplying of wire from the spool when the sensor detects supplying of the end of the wire. The support may hold a plurality of spools and include a plurality of sensors and indicators for sensing and indicating spool depletion. Wires may follow a wire feed path to a winder including a first portion extending generally vertically from the support, a second portion extending generally vertically from the winder, and a third portion connecting the first portion and the second portion.

Abstract: An assembly for supplying wire from a spool includes a support for holding the spool, a sensor mounted on the support and detachably secured to an end of the spool for detecting supplying of the end of the wire from the spool, and a controller for precluding supplying of wire from the spool when the sensor detects supplying of the end of the wire. The support may hold a plurality of spools and include a plurality of sensors and indicators for sensing and indicating spool depletion. Wires may follow a wire feed path to a winder including a first portion extending generally vertically from the support, a second portion extending generally vertically from the winder, and a third portion connecting the first portion and the second portion.