Patents by Inventor Changsong Ma
Changsong Ma has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11994719Abstract: A polymer waveguide and an electrical signal transmission method are disclosed. In a specific implementation, the polymer waveguide includes at least a section of transmission waveguide and a section of dispersion compensation waveguide. The transmission waveguide is connected to the dispersion compensation waveguide. Dispersion symbols of the dispersion compensation waveguide and the transmission waveguide are opposite.Type: GrantFiled: February 8, 2022Date of Patent: May 28, 2024Assignee: Huawei Technologies Co., Ltd.Inventors: Jingyan Ma, Zhuang Zhao, Changsong Xie, Xiaolu Song
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Patent number: 11633809Abstract: A heat-resistant magnetic domain refined grain-oriented silicon steel, a single-sided surface or a double-sided surface of which has several parallel grooves which are formed in a grooving manner, each groove extends in the width direction of the heat-resistant magnetic domain refined grain-oriented silicon steel, and the several parallel grooves are uniformly distributed along the rolling direction of the heat-resistant magnetic domain refined grain-oriented silicon steel. Each groove which extends in the width direction of the heat-resistant magnetic domain refined grain-oriented silicon steel is formed by splicing several sub-grooves which extend in the width direction of the heat-resistant magnetic domain refined grain-oriented silicon steel.Type: GrantFiled: June 20, 2018Date of Patent: April 25, 2023Assignee: BAOSHAN IRON & STEEL CO., LTD.Inventors: Shuangjie Chu, Zipeng Zhao, Yongjie Yang, Changsong Ma, Meihong Wu, Yaming Ji, Aihua Ma, Weiyong Xie, Hai Liu, Jianguo Guo
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Patent number: 11459634Abstract: Disclosed is a method for manufacturing stress-relief-annealing-resistant, low-iron-loss grain-oriented silicon steel, the method comprising: carrying out, by means of a pulse laser, scanning grooving on a single surface or two surfaces of a silicon steel sheet after cold rolling, or after decarburizing annealing, or after high temperature annealing or after hot stretching, temper rolling and annealing, and forming several grooves parallel with each other in a rolling direction of the silicon steel sheet, wherein a single pulse time width of the pulse laser is 100 ns or less, and a single pulse peak energy density is 0.Type: GrantFiled: June 21, 2018Date of Patent: October 4, 2022Assignee: BAOSHAN IRON & STEEL CO., LTD.Inventors: Shuangjie Chu, Guobao Li, Yongjie Yang, Zipeng Zhao, Changsong Ma, Kanyi Shen, Meihong Wu, Yaming Ji, Huabing Zhang, Zhuochao Hu
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Publication number: 20220275470Abstract: Disclosed is a high-magnetic-induction oriented silicon steel, wherein the chemical elements thereof are, in mass percentage: Si: 2.0-4.0%; C: 0.03-0.07%; Al: 0.015-0.035%; N: 0.003-0.010%; Nb: 0.0010-0.0500%, the balance being Fe and inevitable impurities. The manufacturing method for the high-magnetic-induction oriented silicon steel includes the steps of: (1) smelting and casting; (2) heating a slab; (3) hot rolling; (4) cold rolling; (5) decarbonizing and annealing; (6) nitriding treatment; (7) applying an MgO coating; (8) high temperature annealing; and (9) applying an insulating coating; wherein a high-magnetic-induction oriented silicon steel is obtained by the manufacturing method, having an average primary grain size of 14-22 ?m and a primary grain size variation coefficient of higher than 1.Type: ApplicationFiled: August 11, 2020Publication date: September 1, 2022Applicant: BAOSHAN IRON & STEEL CO., LTD.Inventors: Huabing ZHANG, Guobao LI, Kanyi SHEN, Baojun LIU, Changjun HOU, Xinqiang ZHANG, Jianbing CHEN, Meihong WU, Changsong MA, Desheng LIU
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Patent number: 11355275Abstract: A laser-scribed grain-oriented silicon steel resistant to stress-relief annealing and a manufacturing method therefor. Parallel linear grooves (20) are formed on one or both sides of grain-oriented silicon steel (10) by laser etching. The linear grooves (20) are perpendicular to, or at an angle to, the rolling direction of the steel plate. A maximum height of edge protrusions of the linear grooves (20) does not exceed 5 ?m, and a maximum height of spatters in etch-free regions between adjacent linear grooves (20) does not exceed 5 ?m, and the proportion of an area occupied by spatters in the vicinity of the linear grooves (20) does not exceed 5%. The steel has low manufacturing costs, and the etching effect of the finished steel is retained during a stress-relief annealing process. The steel is suitable for manufacturing of wound iron core transformers.Type: GrantFiled: January 24, 2018Date of Patent: June 7, 2022Assignee: BAOSHAN IRON & STEEL CO., LTD.Inventors: Zipeng Zhao, Guobao Li, Yongjie Yang, Meihong Wu, Changsong Ma, Yaming Ji, Chen Ling, Weiyong Xie, Jianguo Guo
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Publication number: 20210023659Abstract: A heat-resistant magnetic domain refined grain-oriented silicon steel, a single-sided surface or a double-sided surface of which has several parallel grooves which are formed in a grooving manner, each groove extends in the width direction of the heat-resistant magnetic domain refined grain-oriented silicon steel, and the several parallel grooves are uniformly distributed along the rolling direction of the heat-resistant magnetic domain refined grain-oriented silicon steel. Each groove which extends in the width direction of the heat-resistant magnetic domain refined grain-oriented silicon steel is formed by splicing several sub-grooves which extend in the width direction of the heat-resistant magnetic domain refined grain-oriented silicon steel.Type: ApplicationFiled: June 20, 2018Publication date: January 28, 2021Inventors: Shuangjie CHU, Zipeng ZHAO, Yongjie YANG, Changsong MA, Meihong WU, Yaming JI, Aihua MA, Weiyong XIE, Hai LIU, Jianguo GUO
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Publication number: 20200362433Abstract: Disclosed is a method for manufacturing stress-relief-annealing-resistant, low-iron-loss grain-oriented silicon steel, the method comprising: carrying out, by means of a pulse laser, scanning grooving on a single surface or two surfaces of a silicon steel sheet after cold rolling, or after decarburizing annealing, or after high temperature annealing or after hot stretching, temper rolling and annealing, and forming several grooves parallel with each other in a rolling direction of the silicon steel sheet, wherein a single pulse time width of the pulse laser is 100 ns or less, and a single pulse peak energy density is 0.Type: ApplicationFiled: June 21, 2018Publication date: November 19, 2020Inventors: Shuangjie CHU, Guobao LI, Yongjie YANG, Zipeng ZHAO, Changsong MA, Kanyi SHEN, Meihong WU, Yaming JI, Huabing ZHANG, Zhuochao HU
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Publication number: 20200058434Abstract: A laser-scribed grain-oriented silicon steel resistant to stress-relief annealing and a manufacturing method therefor. Parallel linear grooves (20) are formed on one or both sides of grain-oriented silicon steel (10) by laser etching. The linear grooves (20) are perpendicular to, or at an angle to, the rolling direction of the steel plate. A maximum height of edge protrusions of the linear grooves (20) does not exceed 5 ?m, and a maximum height of spatters in etch-free regions between adjacent linear grooves (20) does not exceed 5 ?m, and the proportion of an area occupied by spatters in the vicinity of the linear grooves (20) does not exceed 5%. The steel has low manufacturing costs, and the etching effect of the finished steel is retained during a stress-relief annealing process. The steel is suitable for manufacturing of wound iron core transformers.Type: ApplicationFiled: January 24, 2018Publication date: February 20, 2020Applicant: BAOSHAN IRON & STEEL CO., LTD.Inventors: Zipeng ZHAO, Guobao LI, Yongjie YANG, Meihong WU, Changsong MA, Yaming JI, Chen LING, Weiyong XIE, Jianguo GUO
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Patent number: 8917030Abstract: An electronic ballast for a lighting unit may include a Power Factor Correction (PFC) circuit, an inverter, and a control circuit for controlling startup of the inverter, wherein the control circuit is coupled between the PFC circuit and the inverter and includes a switching device coupled in a startup loop for the inverter; a unidirectional conductive device coupled between a PFC power supply circuit for providing an operation current to a PFC controller of the PFC circuit and an input of the PFC controller for preventing a startup current flowing through the PFC circuit from triggering the switching device; and a triggering device coupled to the switching device and a connection point between the unidirectional conductive device and the PFC power supply circuit for controlling switch-on and switch-off of the switching device.Type: GrantFiled: August 25, 2011Date of Patent: December 23, 2014Assignee: OSRAM GmbHInventors: Hong Dai, Yuancheng Guo, Wei Gao, Changsong Ma
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Publication number: 20130224064Abstract: A non-oriented electrical steel sheet without corrugated defect and a manufacturing method thereof is provided, the weight percentage of the chemical composition of the non-oriented electrical steel sheet is that C is no more than 0.005%, Si is 1.2-2.2%, Mn is 0.2-0.4%, P is no more than 0.2%, S is no more than 0.005%, Al is 0.2-0.6%, N is no more than 0.005%, O is no more than 0.005%, and a balance substantially being Fe, a slab can be obtained by hot metal preprocessing, smelting with converter, RH refining, and continuous casting and pouring, wherein a secondary cooling water amount is controlled, the water flowrate of cooling water is controlled to 100-190 l/min, the average superheat of liquid steel in the continuous casting process is controlled to 10-45° C., the slab is heated and hot rolled; wherein the furnace tap temperature of the slab is 1050-1150 ° C., the temperature difference between random two points in the length direction when the slab is heated, is lower than 25° C.Type: ApplicationFiled: April 14, 2011Publication date: August 29, 2013Inventors: Feng Zhang, Xiao Chen, Wei Cao, Yezhong Sun, Changsong Ma, Jianru Zhu, Zhuolei Chen, Xiandong Liu
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Publication number: 20130169185Abstract: An electronic ballast for a lighting unit may include: a Power Factor Correction (PFC) circuit, an inverter, and a control circuit for controlling startup of the inverter, wherein the control circuit is coupled between the PFC circuit and the inverter and includes: a switching device coupled in a startup loop for the inverter; a unidirectional conductive device coupled between a PFC power supply circuit for providing an operation current to a PFC controller of the PFC circuit and an input of the PFC controller, for preventing a startup current flowing through the PFC circuit from triggering the switching device; and a triggering device coupled to the switching device and a connection point between the unidirectional conductive device and the PFC power supply circuit, for controlling switch-on and -off of the switching device.Type: ApplicationFiled: August 25, 2011Publication date: July 4, 2013Applicant: OSRAM GMBHInventors: Hong Dai, Yuancheng Guo, Wei Gao, Changsong Ma