56results about How to "Avoid skin effect" patented technology

The present invention provides a gamma setting system for a display device including: an optical measuring unit measuring an optical property of a display device including an emissive display panel having red, green and blue sub-pixels; a control center performing a null setting step and an automatic setting step using the optical property of the display device; a system driving unit transmitting a result data between the display device and the control center; a first display unit displaying a TW target luminance, a TW target chromaticity and an RGB inherent chromaticity registered for the null setting step and the automatic setting step, a graph of a gray level voltage and a luminance of an RGB and a TW with respect to a gray level, a high level cell driving voltage (PVDD) and a low level cell driving voltage (PVEE) applied to an emitting element, a high level gamma source voltage (VDDH) and a low level gamma source voltage (VDDL) applied to a driving IC, a gamma slope, a contrast ratio, a driving type of the system, a gamma setting, an instruction on an execution command, and a progress state of the display device.

The invention relates to a stator self-excitation synchronous motor with double cage barrier rotors and a control method thereof. The stator self-excitation synchronous motor is characterized in that an inner rotor and an outer rotor are positioned on inner and outer sides of a stator respectively; three-phase symmetry power windings and three-phase symmetry control windings are arranged in grooves on inner and outer surfaces of a stator; the rotors are spliced on the side which is close to the stator along the peripheral direction by using the same cage barrier rotor modules to form a rotor with a salient pole; each cage barrier rotor module is connected with a sleeve by positioning grooves and is provided with a plurality of trapezoid grooves; short-circuit cage bars are put into the trapezoid grooves; a stepped breach is formed in the joint of the adjacent cage barrier rotor modules; and after the adjacent modules are spliced, a public trapezoid groove is formed in the joint of the adjacent modules, the depth of a gap at the bottom of the groove reaches the surface of the sleeve, and public cage bars are put into the grooves. The invention aims to provide the stator self-excitation synchronous motor which is convenient to manufacture, can realize the brushless self-excitation of the stator, is high in power density and steady and dynamic properties and is provided with the double cage barrier rotors.

The invention relates to a synchronous motor, which is characterized in that a set of 2p electrode three-phase armature winding and a set of 2q electrode single-phase excitation winding are placed on a stator, the stator self excitation is realized on the power supply of the excitation winding, a rotor is split into the rotor with the convex electrode form by cage barrier modules in the circumferential direction, each cage barrier rotor module is connected with a sleeve made of non-magnetic conducting materials through a positioning groove, the cage barrier rotor modules are provided with a plurality of radial trapezoidal grooves, each trapezoidal groove is provided with a plurality of different step groove widths in the radial direction, short circuit cage strips are placed into the trapezoidal grooves, the edges of the adjacent cage barrier rotor modules are step-shaped notches, public trapezoidal grooves are formed after the split joint, the gap depth at the bottoms of the grooves reaches the outer surface of the sleeve, and public cage strips are placed into the grooves. The invention aims at providing the novel modularized cage barrier rotor and stator self excitation synchronous motor structure with the advantages that the processing and the manufacture are convenient, and the coupling capability on the two sets of windings of the stator realizes the maximization, so high power density and good steady and dynaic performance are realized.

A magnetic flux generated by current excitation is allowed to run over a portion of the magnetic path of a leakage magnetic flux or the entire magnetic path thereof. The amount of the magnetic flux generated by the current excitation is changed in terms of time to change the amount of the leakage magnetic flux crossing a detection coil, an induction voltage is generated in the detection coil, and consequently a flaw can be detected even in the case where there is no relative rate between a wire rope and a wire rope flaw detector. Further, the shape of the magnetic path and the number of ampere turns of the exciting coil are set to be appropriate to prevent the magnetic flux generated by the current excitation from running through the detection coil and make the magnetic flux get balanced out. Thus, noise superimposition to the detection coil generated by current excitation can be prevented.

The method of applying electric field energy on molten steel to improve quality of silicon steel billet is to introduce electric field energy with the electric field energy generator and the electrodes into molten steel, the electric field energy waveform is duty ratio variable square wave of energy 1000 J-180 MJ, voltage 100-1800V, current 100A-8KA, frequency not higher than 25 Hz and duty ratio of 5-90 %. The electric field energy generator is suitable for use in industrial production and controllable in electric field energy parameters. The treated molten steel results in refined billet structure with obviously increased global crystal, less defaults and high quality.

An audio signal cable consisting of various combinations of two or more distinct types of conductors. The cable contains at least two conductors of different types. The individual conductors within the cable may be individually insulated or uninsulated. The individual conductors may also be of varying shapes and sizes. The conductors are surrounded by a common insulation. Combining at least two types of different conductors within the cable provides the cable with a versatility to be adaptable to a wide variety of sound applications.

The invention relates to a stator double-winding alternating-current motor with double cage barrier rotors. The stator double-winding alternating-current motor is characterized in that an inner rotor and an outer rotor of the motor are positioned on inner and outer sides of a stator respectively; three-phase symmetry power windings and three-phase symmetry control windings are arranged on the inner and outer sides of the stator; the inner rotor and the outer rotor are spliced along the peripheral direction by using the same cage barrier rotor modules to form a rotor with a salient pole; each cage barrier rotor module is connected with a sleeve by positioning grooves and is provided with a plurality of radial trapezoid grooves; short-circuit cage bars are put into the grooves; a stepped breach is formed in the joint of the adjacent cage barrier rotor modules; and after the adjacent modules are spliced, a public trapezoid groove is formed in the joint of the adjacent modules, a gap at the bottom of the groove reaches the surface of the sleeve, and public cage bars are put into the grooves. The invention aims to provide the stator double-winding alternating-current motor which is convenient to manufacture, can maximize the coupling capacity of the power windings and the control windings on two sides of the stator, is high in power density and dynamic property and is provided with the double cage barrier rotors.

The invention relates to a modular single-cage barrier rotor double-stator self-excitation synchronous motor. The motor is characterized in that an inner stator and an outer stator are arranged inside and outside a rotor; a three-phase symmetry armature winding and a single-phase symmetry exciting winding are arranged in slots of each stator, which are near the rotor; cage barrier rotor modules and a sleeve are combined through positioning slots to form a rotor of which inner and outer sides have salient pole types on each of the inner and outer surfaces of the rotor; a plurality of radial trapezoid-shaped slots are formed on the surface of the side of each cage barrier rotor module, which is near the stators and have multiple different step slot widths, and short circuit cage bars are arranged in the slots; a step-shaped opening is formed on a connection part of the adjacent cage barrier rotor modules; after the modules are spliced, common trapezoid-shaped slots are formed on connection parts of the spliced modules, gaps of bottoms of the slots reach the surface of the sleeve, and common cage bars are arranged in the slots; and the invention aims to provide the novel modular single-cage barrier rotor double-stator self-excitation synchronous motor which is convenient to process and manufacture, can realize stator-side self excitation, and has high reliability, and the excellent steady state and dynamic performance.

The invention provides hard tube end forming equipment and a forming method. The hard tube end forming equipment comprises a feeding portion (10), a clamping portion (20) and an extrusion forming portion (30), wherein the clamping portion (20) is used for fixing a hard tube (40) to be formed, and the extrusion forming portion (30) is used for forming a tube end structure of the hard tube (40) to be formed. The hard tube end forming equipment is characterized in that a heating portion (50) is further arranged between the clamping portion (20) and the extrusion forming portion (30). The hard tube end forming equipment is stable in structure, high in reliability, low in cost, high in production efficiency, high in positioning precision and fine in forming quality.

The invention discloses a method for laying an ultra long cable. According to a programmed path, multiple cable protection tube type cable channels are arranged on a laying path, multiple hydraulic driving devices are arranged on the cable channels, a cable production workshop is assembled at a cable laying start end, and production preparation is performed; before production, cable section structure design can be performed, and cable density is controlled; the known production process is utilized to prepare heavy metal suspension, and the density of the heavy metal suspension is made to be equal to the density of the ultra-long cable; when the ultra-long cable is laid, through controlling opening and closing of a variable diameter sealing device I and a variable diameter sealing device IIin a hydraulic driving device, through injecting or extracting the heavy metal suspension, the cable is advanced along a protection tube; no front traction power is required in the entire laying process; the entire cable line has no intermediate joint, only an extra long cable is required to complete the entire power cable line, and thereby the stability of subsequent use of the power cable lineis guaranteed.

The invention relates to a cage barrier spliced outer rotor stator double-winding alternating current motor. The motor is characterized in that an outer rotor is arranged outside a stator, a three-phase symmetry power winding and a control winding are arranged in slots on the surface of the outer side of the stator, and the same cage outer rotor modules are connected with a sleeve through outside positioning slots and spliced in a circumferential direction to form the outer rotor with salient pole types; the inner surface of each cage barrier outer rotor module is provided with radial trapezoid-shaped slots which have multiple different step slot widths, and short circuit cage bars are arranged in the slots; after the adjacent rotor modules are spliced, common trapezoid-shaped slots are formed on connection parts and have multiple different step slot widths along a radial direction, gaps of the bottoms of the slots reach the inner surface of the sleeve, and common cage bars are arranged in the slots; and the invention aims to provide the novel cage barrier combined outer rotor stator double-feed alternating current motor which is convenient to process and manufacture, ensures that the coupling capacity of two windings of the stator is optimized, and has the high power density and the excellent steady state and dynamic performance.

The invention discloses an ultrasonic-enhanced magnetic powder core compression molding method and a compressed powder magnetic core. The invention discloses an ultrasonic enhanced magnetic powder core compression molding method which comprises the following steps: placing soft magnetic powder (coated) in ultrasonic compression molding equipment, setting the ultrasonic frequency to be 15-60kHz and the vibration amplitude to be 70-90%, and simultaneously starting a pneumatic system to pressurize, wherein the pressure is 0.3-0.9 MPa, the compression time is 0.1-10s and the dwell time is 3-5s, and completing the compression molding of a magnetic powder core. The method/process has the advantages of being small in required pressure, short in completion time, high in powder forming density, simple and efficient. The invention further discloses the magnetic powder core prepared by the ultrasonic enhanced magnetic powder core compression molding method, the magnetic powder core has high saturation flux density, low iron loss and high initial magnetic conductivity, and the magnetic conductivity of the magnetic powder core shows good high-frequency stability.

The present invention provides method of applying electric field energy to treat molten steel. One electric field energy generator is used to introduce electric field energy into molten steel via electric poles, and the electric field energy is in square wave of variable duty ratio and has energy of 1000J-200MJ, voltage of 100V-2000V, current 100A-10KA, frequency not higher than 25 Hz, and duty ratio of 5-95 %. The electric field energy generator is suitable for industrial production and has properly adjusted parameters. The treated molten steel has changed solidification process and fine solidified structure, and the solidified material has globular crystal structure and isometric branch structure, less macro segregation and other faults, raised physical and mechanical performance.

The invention discloses a novel super-soft flame-retardant knitting yarn which comprises core wires, a shielding layer and knitting yarn, each core wire comprises a conductor core and an inner insulating layer wrapping the conductor core, the multiple core wires are stranded together to form a signal wire, the shielding layer and the knitting yarn are sequentially arranged outside the signal wire,the conductor core comprises a plurality of wires and a plurality of strands of reinforced fibers, and the plurality of wires and the plurality of strands of reinforced fibers are uniformly distributed and stranded together to form the conductor core; the invention further discloses a manufacturing method of the cable. The manufacturing method comprises the steps of preparing polyphenylene sulfide silk threads, wires, reinforcing fibers, shielding wires and reinforcing wire raw materials, twisting the conductor cores, wrapping the core wires, twisting the core wires, weaving the shielding layer and weaving the yarns. By arranging a specific structure and a corresponding manufacturing method, the strength and the flexibility of the core wire are enhanced while the wire is fully dispersed,a good heat insulation, flame retardance and shielding effect is achieved, the skin effect generated by signals or currents in wire transmission is effectively avoided, and the transmission capacity of the wire is enhanced.

The invention discloses a milliohm-level dummy load used for a high power supply system and a design method thereof. The dummy load includes an outer layer metal pipe 1, an inner layer metal pipe 2, ametal upper disc 3, a metal lower disc 4, terminal threaded holes 5, wiring socket threaded holes 6 and a rectangular hole 8; the height of the inner layer metal pipe 2 is greater than that of the outer layer metal pipe 1; the inner layer metal pipe 2 is coaxially put into the outer layer metal pipe 1; the bottoms of the two metal pipes are coaxially welded on the metal lower disc 4; the top of the inner layer metal pipe 2 are welded on the metal upper disc 3; the terminal threaded holes 5 are located in the pipe wall of the outer layer metal pipe 1; the wiring socket threaded holes 6 are located in the metal upper disc 3; and the rectangular hole 8 is located in the pipe wall of the inner layer metal pipe 2, and the height of the rectangular hole is greater than that of the outer layer metal pipe 1. Through the dummy load which is formed through the coaxial welding of the inner and outer metal pipes, skin effects can be avoided; and the dummy load is fast in heat dissipation, compactin structure, small in volume, laborsaving and time-saving in manufacturing and small in dummy load resistance and can reach a milliohm level.