10results about How to "Reduce skin effect" patented technology

The electrical connector (10) includes a pair of plates (20) having a first conductive plate (12) and a second conductive plate (14), each plate having a central portion (24) and two connecting lugs (32, 34). The connecting lugs of each plate extend longitudinally from opposite edges (28, 30) of the central portion and are laterally offset from each other. The first and second plates are stacked on top of each other, with the central portions overlapping and separated by a gap (36). The connecting lugs of the first and second plates on each of the opposite edge sides are laterally offset from each other. The electrical connector further includes an insulating structure comprising a sandwich of electrically insulating material accommodated in the gap (36) between the central portions of the first and second plates.

The utility model discloses a motor stator, motor and flywheel energy storage device, motor stator includes: silicon steel sheet, is set up with cooperation groove on silicon steel sheet, is provided with first step portion and second step portion in cooperation groove, first step portion sets up in the slot mouth department of cooperation groove, and second step portion sets up in the one side of the slot mouth of cooperation groove away from first step portion of second step portion, stator coil is set up in cooperation groove, and stator coil is located in the one side of second step portion away from first step portion. Second step portion sets up in the one side of the slot mouth of cooperation groove away from first step portion, and stator coil is located in the one side of second step portion away from first step portion, so can make stator coil away from the slot mouth setting, can reduce the influence that high harmonic brings skin effect, solve the problem that the skin effect of slot mouth portion stator coil is big, reduce the heat output and ageing problem of stator coil, can avoid big magnetic flux leakage simultaneously, in addition can also weaken the heat of motor rotor, thereby can increase the life of motor.

The utility model discloses a motor stator, including stator core and flat wire, be equipped with a plurality of stator slot in the stator core, the flat wire is in the stator slot inner layer and is arranged, the cross section of flat wire is trapezoidal, the same layer includes two combined flat wire in the stator slot, the shape and size of flat wire in the stator slot are same. In the utility model, by setting the cross section of flat wire as trapezoidal, make the arrangement mode of flat wire in the stator slot more flexible and various, can adapt to different shape stator slot, and promote the slot full rate, reduce the skin effect influence.

The application discloses an electrode for electric spark machining of a micro-hole with a large depth-diameter ratio and a preparation method thereof, and belongs to the technical field of tool electrode preparation. The electrode comprises a tungsten wire rod, and the diameter of the tungsten wire rod is 0.1-0.4 mm. The tungsten wire rod is characterized in that a uniform and stable zirconium oxide insulation layer is arranged on the peripheral wall of the tungsten wire rod. The electrode selects the stable zirconium oxide layer as the insulation layer, which can enhance the insulation property of the peripheral wall of the electrode. On one hand, the electrode can reduce the discharge removal between the peripheral wall of the electrode and the side wall of the hole in the electric spark machining process, thereby improving the forming precision of the micro-hole. On the other hand, the electrode can reduce the skin effect of the current in the electrode and increase the current density of the center of the end surface of the electrode. Meanwhile, the end surface of the insulation layer has the conductivity in the electric spark discharge, electric spark discharge is generated to remove the material, and the electric spark machining efficiency is improved.

A therapeutic device for cell stimulation or cell therapy comprises a housing accommodating electrodes, a generator for generating high-frequency pulses, a processor unit comprising a control, regulation and calculation module, a memory unit, a control element, a controllable modulator by means of which the generator can be controlled. A voltage pulse sequence comprising a plurality of voltage pulses can be generated by means of the modulator, wherein the frequency of the voltage pulse sequence can be at least partially non-constant.

The utility model provides an electromagnetic induction coil, a device and a heating smoking set, comprising at least two Litz leads which are arranged side by side and have insulated surfaces, the Litz leads spirally extend and are wound into a multi-turn coil, and an accommodating cavity is formed in the coil along the extending direction; the first end of the coil is bent and then extends to be roughly flush with the second end in the extending direction, and the electromagnetic induction coil generates an induced magnetic field to heat the smoke cartridge in the power-on state. A circuit system can capture and process feedback signals conveniently, the diameter, the number of strands, the number of layers and the number of turns of an optimized electric conductor are flexibly set, a multi-turn coil with appropriate inductance and quality factors is wound, the skin effect and the proximity effect under high-frequency application are reduced, and the multi-turn coil has the advantages of being low in loss and high in reliability. The method is suitable for preparing an aerosol generating system with high working efficiency.

The application discloses a movable emergency modular transformer substation, and relates to the technical field of transformer substations. The transformer substation comprises a shell, universal wheels, a voltage transformation mechanism and a temperature control mechanism. The voltage transformation mechanism and the shell are fixedly connected, the temperature control mechanism and the shell are fixedly connected, the temperature control mechanism and the voltage transformation mechanism are communicated, the shell and the universal wheels are fixedly connected, the universal wheels are located below the shell, and the temperature control mechanism is located on the periphery of the shell. The shell provides high-strength physical protection and support space for the whole device. The universal wheels located below the shell endow the transformer substation with flexible moving capability, so that the transformer substation can quickly respond to emergency demands. The voltage transformation mechanism is fixed in the shell to perform core voltage conversion operations. The temperature control mechanism located on the periphery of the shell and communicated with the voltage transformation mechanism can perform real-time thermal management on the internal environment of the shell, so that the voltage transformation mechanism can stably operate for a long time at a suitable temperature.

The utility model discloses a kind of intermediate frequency DC reactors, including magnetic core, coil, input conductive row and output conductive row, the magnetic core is oppositely equipped with two iron columns, the coil is equipped with two groups and is respectively wound on the two iron columns of the magnetic core, the coil is wound with thin wide metal foil and is formed, the input conductive row is located in the lower portion of this intermediate frequency DC reactor and is connected with the coil, the output conductive row is located in the upper portion of this intermediate frequency DC reactor and is connected with the coil. The utility model winding loss is small, and the heat dissipation performance is excellent, compact structure, high reliability, strong environmental adaptability, can be adapted to intermediate frequency working condition.

This invention provides a stator assembly and a motor system having the same. The stator assembly includes: a stator core having multiple axially extending stator slots evenly arranged along the circumference of the stator core; a winding assembly including at least slot-in-slot Litz wires and end flat wires, the slot-in-slot Litz wires passing through the stator slots, and two end flat wires, each end of the slot-in-slot Litz wire connected to one of the end flat wires; and a busbar connected to one of the end flat wires. By applying the technical solution of this invention, due to the inherent structural characteristics of Litz wires, using slot-in-slot Litz wires can effectively reduce the skin effect of the winding assembly, thereby reducing the AC copper loss of the stator assembly, improving the power density and efficiency of the motor. The connection of the two ends of the slot-in-slot Litz wires to the end flat wires results in better end forming of the winding assembly, improving the manufacturing difficulty and height of the winding ends.

The utility model belongs to underwater cable technical field discloses a kind of bending-resistant underwater cables, including conductor, insulating layer, sheath layer and protective layer, conductor is formed by multiple copper wire strands multilayer complex twisting, and the complex twisting direction of each layer copper wire strand is same, copper wire strand is formed by multiple tinned copper wire bundle twisting, insulating layer is coated in the outer periphery of conductor, sheath layer is coated in the outer periphery of insulating layer, protective layer is coated in the outer periphery of sheath layer, the material of protective layer is polyether polyurethane elastomer, shore hardness is (A80-D70).The bending-resistant underwater cable provided by the utility model has pressure resistance and flexibility simultaneously, when bending laying, it can be quickly laid, reduce the degree of difficulty of laying, simultaneously, it can effectively reduce the degree of stress concentration at bending, the risk of fracture at bending is low, and it can stably transmit electric energy.