7results about How to "Increase thrust density" patented technology

The invention relates to a cooling structure for an ultraprecise linear motor and belongs to the technical field of linear motors. The cooling structure solves the problem of proneness to heat exchange with environment caused by high side temperature of two-side surface-mounted cooling structures of existing linear motors. The cooling structure comprises a winding supporting portion, a winding and a heat conductive portion, wherein the winding is fixed on the surface of the winding supporting portion, the heat conductive portion is arranged on the surface on the outer side and fixedly connected with the winding supporting portion, the heat conductive portion is a copper foil ring which fits the outer profile of the winding and is sleeved and fixed on the surface on the outer side of the winding, or the heat conductive portion is a copper foil heat conductive ring formed by arraying multiple copper foil sections in a dispersed manner, the copper coil heat conductive ring fits the outer profile of the winding, and each copper coil section is fixed on the surface on the outer side of the winding. The cooling structure for the ultraprecise linear motor is suitable for cooling of linear motors.

This invention belongs to the field of permanent magnet motor technology, specifically relating to a dual-secondary modular permanent magnet flux switching linear motor and its manufacturing method, comprising a motor primary and a motor secondary, with an air gap structure provided between the motor primary and the motor secondary; wherein, the motor primary includes at least one motor primary module with identical structure; the motor primary module includes an iron core, a permanent magnet, and an armature coil; the permanent magnet is placed inside the iron core, and the permanent magnet is distributed in a double U-shape around the armature coil; the motor secondary adopts an axisymmetric double-sided secondary structure composed of an iron core.

This utility model discloses a mover structure and a linear motor. The mover structure includes a mover yoke and multiple mover units. Each mover unit includes a mover tooth, a winding, a pole shoe, and two first permanent magnets. The pole shoe includes a main body and a side protrusion. Two mounting slots are spaced apart in the pole shoe. Each mounting slot includes a first slot segment and a second slot segment corresponding to the main body and the side protrusion, respectively. The bottom wall of the second slot segment has an opening. The two first permanent magnets are mounted in the two mounting slots. The pole shoe has a first chamfer structure at each edge on the outer side of the main body, at each edge of the mounting slot located at its opening, and at least one edge of the second slot segment located at its opening. This utility model helps to achieve thrust stability as much as possible while maintaining a relatively high thrust density.

The application discloses a novel high-temperature-resistant coreless linear motor with a water-cooling heat dissipation structure and belongs to the technical field of linear motors. The motor comprises upper and lower stator assemblies arranged in parallel and a mover component arranged in the passages of the two stator assemblies. The stator assembly is formed by fastening a stator yoke plate, a permanent magnet array and a water-cooling support plate to form a sealed liquid-cooling chamber. The permanent magnet array is completely immersed in the cooling liquid. An S-shaped flow guide rib is arranged in the chamber. The end of the water-cooling support plate is provided with a liquid inlet and a liquid outlet and is externally connected with a water-cooling machine. The water-cooling support plate is made of a non-magnetic high-thermal-conductivity material. The mover component comprises high-temperature-resistant winding coils and is wound by inorganic insulation foil wires and is integrally solidified by a high-temperature-resistant material. The application can ensure that the permanent magnet always works in a stable magnetic performance interval at a temperature of 300 DEG C or above, ensures large thrust output, significantly suppresses thrust fluctuation and improves the operation reliability of the system.

The application discloses a guide rail embedded type linear motor module, which comprises a guide rail and a sliding block; a groove is arranged on the inner surface of the sliding block and on the two sides of the guide rail, a rolling body raceway made of carbon steel or stainless steel is embedded in the groove, a return hole is arranged in the sliding block, return end covers are fixedly installed on the left and right ends of the sliding block, a rotary groove is arranged in the return end cover, the rolling body raceway, the return hole and the rotary groove form a rolling circulation rotary channel, and a rolling body made of stainless steel is installed in the rolling circulation rotary channel; the return hole is located above the rolling body raceway; a magnetic grating ruler or an optical grating ruler is arranged on the guide rail, and an optical grating reading head is arranged on the sliding block; a linear motor stator is installed on the guide rail, a linear motor rotor corresponding to the linear motor stator is arranged on the sliding block, and the motor rotor is communicated with a power supply. The application ensures that the rolling body does not pass through the magnetic induction line range when rotating, guarantees that the rolling body is not magnetized, and guarantees the smoothness of the rolling body rotation.

The application discloses a high thrust density cylindrical linear motor based on a wave-shaped air gap, which is composed of a wave-shaped stator core, an armature winding, a wave-shaped permanent magnet and a mover core, a wave-shaped air gap is arranged between the stator and the mover in the circumferential direction, the air gap area is increased, the air gap magnetic flux density distribution is adjusted, and the output thrust quality is improved. A wave-shaped permanent magnet excitation structure is arranged on the mover, the stator tooth top is arranged in a wave-shaped distribution same as the permanent magnet excitation structure distribution in the circumferential direction, and the air gap length is ensured to be equal everywhere. The wave-shaped permanent magnet excitation structure is composed of a plurality of pairs of permanent magnets arranged in a wave-shaped distribution in the circumferential direction and stacked in the axial direction, can generate a magnetic aggregation effect, and improve the excitation capacity in the motor. The cylindrical linear motor disclosed by the application has the characteristics of large output thrust, high thrust density and high efficiency, and is suitable for application occasions such as numerical control machine tool machining, electromagnetic launching and automobile suspension systems which require high thrust and high efficiency.

This invention relates to the field of voice coil motor technology, specifically to a compact multi-air-gap uniform magnetic field high-thrust planar voice coil motor, comprising a motor outer frame, a first stator, a second stator, and a third stator. The first stator is located in the middle of the motor outer frame. Two sets of second stators are respectively installed on both sides of the first stator, forming an inner air gap between the two sets of second stators. Two sets of third stators are respectively located at the upper and lower ends of the motor outer frame, forming an outer air gap between the second stator and the third stator. A set of first inner movers is disposed in the inner air gap, and several sets of second inner movers are disposed in the outer air gap. In this invention, the magnetic flux starts from the permanent magnet, passes through the yoke, crosses the working air gap, and returns to the main channel of the yoke, reducing magnetic flux leakage into the outer space, thereby improving magnetic field utilization and reducing magnetic leakage. The parallel operation of multiple air gaps increases the total thrust and thrust density without significantly increasing the overall size.