Stator coreless linear motor technology research and development, stator coreless linear motor is a new type of special motor derived from the stator stator coreless linear motor, with high efficiency, low torque ripple, strong overload ability, torque - Features such as good current characteristics are important branches and directions for the development of linear motor technology. Statorless iron core linear motors have important application value and advantages in wind power generation, flywheel energy storage, electric propulsion and other fields. With the continuous advancement and development of magnetic levitation technology, superconducting technology, and high switching frequency wide bandgap power device technology, the stator coreless linear motor will have a broader application prospect.
Based on the principle of magnetic field formation, the stator coreless and slotless linear motors were classified, including radial magnetic field type, axial magnetic field type, and linear motion type. Three types of statorless ironless linear motors are given in typical structure. The stator coreless or slotless linear motor removes the magnetically permeable silicon steel sheet or eliminates the magnetically conductive teeth from the stator. The motor is in the structural principle, design and analysis, and manufacturing process. There have been major changes in other areas.
The stator core or stator slot is eliminated, the winding is directly exposed to the magnetic field, and the positioning and protection of the core are lost, and the design method and manufacturing process are completely changed. Winding design, rotor structure design, loss calculation and cooling design are the key technologies of the stator coreless linear motor.
Stator winding structure and molding technology: The design of the winding structure directly determines the winding factor. On the other hand, it also determines the length and space of the winding end. More importantly, the structural design directly affects the entire stator winding forming method and process. . Radial magnetic field type, linear motion type, axial magnetic field type stator The coreless winding linear motor basically has similar winding shape.
The stator coreless linear motor is an important branch and direction of linear motor technology development. The following key technologies need attention and breakthroughs to promote their industrialization and application.
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Linear motor