Baoshan Iron & Steel Co., Ltd.

Chengdu Monolithic Power Systems Co., Ltd.

Shanghai Foreal Optoelectronic Co., Ltd

Fei Xiong

Shanqing Li

Zhenglian Jiang

Qiming Zhao

Jianghua Xu

Sanbing Ren

Junfei Fan

Xiaohu Liu

Chunwei Zhang

Anmin Zheng

Yiru Wang

Xue Jiang

Yimin Liang

Jianyu Xie

Changming Gu

Yao Zheng

Rongzhuang Mao

Provided is a vacuum coating device, comprising a crucible (), an induction heater () arranged on the outer side of the crucible (); a flow distribution box connected to the top of the crucible () through a steam pipeline (); a pressure regulating valve () and a diverter valve () sequentially arranged in a direction in which the steam pipeline () is in communication with the flow distribution box; a horizontal pressure stabilizing plate () arranged in the flow distribution box, a plurality of sub-nozzles () connected to the top of the flow distribution box; wherein a plurality of air flow distribution chambers are arranged in the diverter valve (); a ratio of a total area of the air flow distribution chambers (S) to an area of the steam pipeline () in the radial direction (S) is greater than or equal to 0.1, i.e.: S/S≥0.1. According to the device, a uniform spray flow can be formed, a uniform coating () is formed on the surface of a steel plate () when high temperature steam is in contact with a low temperature steel plate, the spray flow formed by the sub-nozzles () arranged at the rear portion continuously covers the deposited metal layer that has been formed, so as to achieve efficient coating of strip steel under vacuum conditions.

Vacuum coating device

Disclosed is a rolling method for a board having various longitudinal thicknesses, comprising the following steps: 1) setting a number N of uniform-thickness segments of a sample, thicknesses h, h, . . . , hof the uniform-thickness segments, lengths L, L, . . . , Lof the uniform-thickness segments, and lengths T, T, . . . , Tof transitional segments between the uniform-thickness segments, the N uniform-thickness segments having N&#x2212;1 transitional segments therebetween, and both the thickness and length having a unit of mm; 2) selecting a raw material; 3) setting a rolling force, a roll gap and a rolling period of time for each segment; 4) preparing rolling; 5) conducting rolling; 6) optimizing rolling parameters, measuring thicknesses and lengths of the uniform-thickness segments and lengths of the transitional segments after the rolling member is rolled; comparing the measured thicknesses of the uniform-thickness segments with the set thicknesses for the sample, so as to correct the rolling force Pand roll gap Gset for each segment in step 3); comparing the measured lengths with the positions marked in step 4), so as to correct the rolling period of time set for each segment in step 3); repeating steps 4) and 5) using raw materials of the same size, and making correction again, wherein a rolled member meeting the requirements of the sample can be made after 2-3 times of trial rolling. This method avoids preparation of a raw material in the form of a roll, avoids study on a complex controlling method for various-thickness rolling of the roll, and saves the raw material and test time.

Rolling method for boards with different longitudinal thicknesses

Disclosed are a system and method for controlling a thickness of a hot-dip galvanized coating on a strip material with a continuously varying thickness. The system of the present disclosure is capable to provide a zinc coating with a uniform thickness on a coiled starting material with a continuously varying thickness, and the method of the present disclosure provides a simplified process to achieve such objective.

Hot-dip galvanized layer thickness control system and method for continuous thickness-varying strip material

A switching power supply comprising a switching circuit and a controller. The controller comprises a preprocessing circuit, a first multiplier, a first comparing circuit and a logic circuit. The controller comprises a preprocessing circuit, a first multiplier, a first comparing circuit and a logic circuit. The preprocessing circuit generates a first multiplication input signal based on the input voltage and output voltage of the switching circuit. The first multiplier multiplies the first multiplication input signal by a second multiplication input signal and generates a first product signal. The first comparing circuit compares a current sensing signal representative of the input current with the first product signal and generates a first comparison signal. The logic circuit turns off a main switch in the switching circuit when the current sensing signal is larger than the first product signal.

Switching power supply with optimized THD and control method thereof

System and method for LED light source. According to an embodiment, the present invention provides a an LED light system for emitting substantially white light. The system includes a first dichroic element, the first dichroic element comprises a first dichroic surface having a first coating, the first coating being adapted to reflect over 95% of a first color and transmit over 95% of a second color, the first dichroic surface having a first side and a second side. The system also includes a second dichroic element, the second dichroic element comprises a second dichroic surface having a second coating, the second coating being adapted to reflect over 95% of a third color and transmit 95% of a fourth color, the second dichroic surface having a third side and a fourth side.

System and method for LED light source

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Shanghai, China

Fei Xiong