38results about How to "Guaranteed electromagnetic performance" patented technology

The invention relates to oriented silicon steel and a preparing method thereof. The oriented silicon steel comprises, by weight, 0.030%-0.070% of C, 2.8%-3.5% of Si, 0.15%-0.30% of Mn, 0.35%-0.80% of Cu, 0.0040%-0.015% of S, 0.015%-0.025% of Als, 0.070%-0.015% of N, smaller than or equal to 0.020% of P, 0.002%-0.02% of Ti, and the balance Fe and inevitable impurities, wherein C / Ti is smaller than or equal to 10, and Cu / S is larger than or equal to 50. The preparing method comprises the steps of converter smelting, vacuum treatment, continuous casting, soaking pit heating, hot continuous rolling, first-time cold rolling, decarburization annealing, second-time cold rolling, MgO parting agent coating, high-temperature annealing and rewinding, the iron loss P1.7 of the oriented silicon steel is smaller than 1.18 W / kg, and the magnetic inductance B8 of the oriented silicon steel is larger than or equal to 1.86 T.

The invention relates to a high-capacity low-speed permanent-magnet wind-driven generator. According to the generator, multiple three-phase windings are used and integer slots are centralized to improve the coefficient of the windings and the utilization ratio of an iron core; the number of in-series turns per phase of the armature winding is increased to reduce the axial length of the iron core of a motor; and a permanent-magnet pole is dislocated or skewed to reduce tooth harmonic and pulsating torque. On the premise of ensuring that the electromagnetic performance of the generator and the complexity of the motor manufacturing process meet the requirements, the invention realizes material saving of the permanent magnet in the high-capacity low-speed permanent-magnet wind-driven generator, effectively reduces the cost of the motor, and provides directions for the popularization and application of the high-capacity low-speed permanent-magnet wind-driven generator.

The embodiment of the invention relates to a circuit board processing method, comprising the following steps of: fixing a conductive coil on a first core board, arranging the conductive coil between the first core board and a second core board, and for leading the ports of the conductive coil out of the surface of the circuit board, drilling at the position of the ports, and electroplating at thepositions of port leading-out holes to obtain an electroplated layer for leading the ports out of the surface. The embodiment of the invention also provides a corresponding circuit board. Thus, the conductive coil is embedded in the circuit board and is not exposed on the surface of the circuit board, no loss is produced when current is introduced as the conductive coil is not exposed in the air,the electromagnetic properties of PCB (Printed Circuit Board) products are guaranteed, and especially the invention can be widely applied in the power supply industry with high requirement for current density.

The off-line testing equipment of electromagnetic performance of long-stator linear motor includes a testing platform, on its surface a guideway is set, one end of said testing platform is equipped with a fixed supporting frame on which one end of a pulling sensor with high accuracy is connected, said testing platform also is equipped with several fastening bolts. Said off-line testing equipment also includes a rotor steel plate connected with the above-mentioned guideway by means of supporting frame, said rotor steel plate has several holes, every hole interior is equipped with a group of electrodynamic induction coils, every group container three electrodynamic induction coils, and every induction coil is series-connected with A.C. electric meter. The long-stator to be tested is fixed on the testing platform.

The invention relates to a manufacture method of cold-rolling non-oriented electrical steel, in particular to a hot rolling method of cold-rolling low-carbon non-oriented electrical steel, comprising a finishing step and a coiling step after the finishing step. At least two passes of rolling are carried out on a plate blank in the finishing step; two phase regions of the austenite and the ferriteof a plate blank have a temperature range with an upper limit lower than 900 DEG C and a lower limit higher than 850 DEG C; and the plate blank is forcefully cooled between two adjacent passes in thefinishing step and has a rolling temperature higher than 900 DEG C in the prior pass and a rolling temperature lower than 850 DEG C in the later pass. The hot rolling method enables a common finishing mill group to be suitable for the production of the cold-rolling low-carbon non-oriented electrical steel, simplifies the control method, decreases the production cost and is beneficial to the production and the popularization of the cold-rolling low-carbon non-oriented electrical steel.

The invention discloses low-temperature rapidly sintered soft magnetic ferrite and a preparation method thereof. The preparation method comprises the following steps: S1, weighing the following components in parts by mole: 60-80 parts of ferric oxide, 40-60 parts of zinc oxide, 30-50 parts of copper oxide and 15-20 parts of manganese carbonate, and performing mixing ball-milling till the average particle size is 5-30 [mu]m so as to obtain mixed powder; S2, pre-sintering the mixed powder at 900-1000 DEG C so as to obtain a pre-sintered material; S3, weighing yttrium oxide, aluminum oxide and lithium carbonate as doping materials; S4, adding the doping materials weighed in the step S3 into the pre-sintered material, performing secondary ball-milling for 6-8 hours, drying, adding polyvinyl alcohol, and performing pelletizing so as to obtain a granular material; S5, heating the granular material to sintering temperature in the presence of an air atmosphere, and performing warm-keeping sintering, thereby obtaining the low-temperature rapidly sintered soft magnetic ferrite, wherein the sintering temperature meets the equation that T=1454 / [1g(X+2Y+Z)+t]. Due to mutual cooperation of the main material and the doping materials, a preparation process is optimized, the sintering temperature is reduced, and meanwhile the electromagnetic properties of the ferrite are ensured.

The invention relates to a manufacture method of cold-rolling non-oriented electrical steel, in particular to a hot rolling method of cold-rolling low-carbon non-oriented electrical steel, comprising a finishing step and a coiling step after the finishing step. At least three passes of rolling are carried out on a plate blank in the finishing step; two phase regions of the austenite and the ferrite of a plate blank have a temperature range with an upper limit lower than 900 DEG C and a lower limit higher than 850 DEG C; and the plate blank has a rolling temperature higher than 900 DEG C in the first pass, no temperature in the second pass and a rolling temperature lower than 850 DEG C in the third pass of the three continuous passes in the finishing step and is forcefully cooled between the first pass and the third pass of the three continuous passes. The hot rolling method enables a common finishing mill group to be suitable for the production of the cold-rolling low-carbon non-oriented electrical steel, simplifies the control method, decreases the production cost and is beneficial to the production and the popularization of the cold-rolling low-carbon non-oriented electrical steel.

The invention discloses an orthogonal dual-polarized metal slot antenna array structure and an antenna array containing the structure, and solves the problem in the prior art that high-temperature welding formation is adopted to cause poor antenna precision, resulting in reducing the yield, limiting by the welded aluminum alloy material and reducing the mechanical strength of the antenna, or the assembly formation of spare parts is adopted, resulting in increasing the weight of the antenna, reducing the mechanical strength of the antenna and increasing the number of structural parts that are independent of electromagnetic properties, so as to narrow the scope of application. The antenna array structure comprises an antenna bottom plate, and a sub-structure unit mounted on the antenna bottom plate and interposed by horizontal radiating unit pieces and vertical radiating element pieces. The antenna array includes an antenna array structure. The antenna array structure and the antenna array have the advantages of simple structure, scientific and reasonable design and convenient use, and can effectively ensure the accuracy of the antenna to improve the production yield, effectively improve the mechanical structure strength, reduce the weight of the antenna, and ensure the electromagnetic performance of the antenna array to expand the applicable range.