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    • 12. 发明授权
    • Phase-difference synchronization controlling circuit of parallel
switching mode power supply
    • 并联开关电源的相差同步控制电路
    • US5369564A
    • 1994-11-29
    • US64471
    • 1993-05-20
    • Seung Choi
    • Seung Choi
    • H02M3/335H02M3/28
    • H02M3/285
    • A power circuit of SMPS (Switching Mode Power Supply) is disclosed. Particularly, a phase-difference synchronization controlling circuit of a power circuit for operating in parallel two or more SMPSs is disclosed. The phase-difference synchronization controlling circuit comprises a first PWM controller, a second PWM controller, phase-difference synchronization controlling means connected between an output terminal of the first PWM controller and an output control terminal of the second PWM controller, first and second transformers whose one-sided ends of respective primary windings are connected to a supply voltage Vdc, and first and second switching transistors and coupled between the first and second transformers and a ground. By the above constitution, the output phases of two power circuits are synchronized, and at the same time, PWM pulses are alternatively outputted with a phase difference of 180.degree., so that two power supplies can be operated in parallel with DC power source supplied from a power source supplier of small capacity.
    • 公开了一种SMPS(开关电源)的电源电路。 特别地,公开了并联运行两个以上SMPS的电源电路的相位差同步控制电路。 相位差同步控制电路包括第一PWM控制器,第二PWM控制器,连接在第一PWM控制器的输出端和第二PWM控制器的输出控制端之间的相位差同步控制装置,第一和第二变压器, 各个初级绕组的单侧端连接到电源电压Vdc,第一和第二开关晶体管连接在第一和第二变压器和地之间。 通过上述结构,两个电源电路的输出相位同步,同时以180°的相位差交替输出PWM脉冲,使得两个电源可以与从 一个容量小的电源供应商。
    • 17. 发明申请
    • Atomic layer deposition apparatus
    • 原子层沉积装置
    • US20060137608A1
    • 2006-06-29
    • US11318786
    • 2005-12-27
    • Seung ChoiChun LeeKwang Park
    • Seung ChoiChun LeeKwang Park
    • C23C16/00
    • C23C16/45544C23C16/14C23C16/45512C23C16/45536C23C16/45565C23C16/45591C23C16/515
    • An atomic layer deposition (ALD) apparatus is, suitable for thermal ALD and plasma-enhanced ALD of conductive and non-conductive films. The ALD apparatus can maintain electrical insulation of a gas dispersion structure, such as a showerhead assembly, which acts as an RF electrode to generate plasma inside a reaction chamber while depositing electrically conductive films in the reaction chamber. Fine tubules of micro-feeding tube assembly prevents plasma generation in them and reactive gases each have separate flow paths through the micro-feeding tube assembly. Process gases out of the micro-feeding tube assembly enter narrow grooves of a helical flow inducing plate and form helical flows which mix well each other. Symmetrically mounted pads on showerhead assembly and flow guiding plate maintain a symmetrical gap through which an inert gas flows continuously to keep reactive gases outside the gap and unwanted film deposition in the gap. Longer operating time before maintenance (cleaning) and thus higher productivity can be achieved.
    • 原子层沉积(ALD)装置适用于导电和非导电膜的热ALD和等离子体增强ALD。 ALD设备可以保持气体分散结构的电绝缘,例如淋浴头组件,其用作RF电极,以在反应室内沉积导电膜的同时在反应室内产生等离子体。 微型进料管组件的细小管防止了其中的等离子体产生,并且反应性气体各自具有通过微型进料管组件的分离的流动路径。 从微型进料管组件流出的工艺气体进入螺旋流引导板的窄槽并形成相互混合的螺旋流。 喷头组件和导流板上的对称安装的垫保持对称间隙,惰性气体通过该间隙连续流动以将反应气体保持在间隙之外并且在间隙中不期望的膜沉积。 在维护(清洁)之前更长的操作时间,从而实现更高的生产率。
    • 19. 发明申请
    • Drum type washer
    • 鼓式洗衣机
    • US20050126230A1
    • 2005-06-16
    • US11008141
    • 2004-12-10
    • Seung Choi
    • Seung Choi
    • D06F37/40D06F33/02D06F37/20D06F37/30H02K1/18H02K7/04H02K7/14H02K11/00H02K29/08D06F37/00
    • D06F37/304D06F37/206D06F37/302D06F2202/065H02K1/2786H02K29/08
    • The present invention provides a drum type washer, by which a drum opening can be correctly aligned with a tub opening without a physical contact with a drum or motor using a position detection sensor. The present invention includes a tub having a tub opening on an upper side and brackets on front and rear ends to support bearings, respectively, a drum provided within the tub to have a washing chamber inside, a door provided over the tub to open/close the tub opening, a motor rotating the drum, the motor including a rotor provided to an outside of the motor to make a rotation, the rotor including a rotor frame made of a steel plate in one body, a multitude of magnets attached to an inner circumference of the rotor frame, and a position decision magnet coupled to one side of the rotor frame and a stator provided within the rotor to receive a current, the stator including a hole sensing unit having a speed detection hole sensor detecting a plurality of the magnets and a position detection hole sensor detecting the position decision magnet, and a washing shaft coupled to a front center of the drum to be connected to the motor, and an assist shaft coupled to a rear center of the drum.
    • 本发明提供了一种滚筒式洗衣机,通过该滚筒式洗衣机,可以使用位置检测传感器将滚筒开口与滚筒开口正确地对准,而不用与滚筒或马达进行物理接触。 本发明包括一个在上侧具有桶开口的桶,在前端和后端具有支架,分别支撑轴承,设置在桶中的桶以在其内部具有洗涤室,设置在桶上以打开/关闭的门 所述滚筒开口,使所述滚筒旋转的马达,所述马达包括设置在所述马达外部以进行旋转的转子,所述转子包括由一个主体中的钢板制成的转子框架,多个磁体附接到内部 转子框架的圆周和耦合到转子框架的一侧的位置判定磁体和设置在转子内以接收电流的定子,定子包括具有检测多个磁体的速度检测孔传感器的孔检测单元 以及位置检测孔传感器,其检测位置决定磁体,以及洗涤轴,其耦合到所述滚筒的前中心以连接到所述马达,以及辅助轴,其耦合到所述滚筒的后中心。
    • 20. 发明授权
    • Electromagnetic matched filter based multiple access communications systems
    • 基于电磁匹配滤波器的多址通信系统
    • US06885713B2
    • 2005-04-26
    • US09752392
    • 2000-12-29
    • Tim OlsonUlf OsterbergDennis HealySeung Choi
    • Tim OlsonUlf OsterbergDennis HealySeung Choi
    • H04J14/02H04L25/03H04B1/10
    • H04J14/02H04L25/03834
    • An electromagnetic matched filter based multiple access communications system having a source of modulated pulses from a digital data stream; an initial filter which shapes the incoming modulated pulse into a desired pulse for transmission across the communication medium; a second filter, identical to the initial filter, which is matched to the pulse which exit the communication medium, a detector which converts the modulated pulse stream into the original digital data stream, and signals which are designed with specific mathematical properties which make the system efficient and minimizes crosstalk between channels. The signals decay rapidly from the central lobe at a higher than 1/x rate and the zero points of the autocorrelation function having high order multiplicities. The type of system allows multiplexing of multiple data streams with much greater flexibility, robustness, and density.
    • 一种基于电磁匹配滤波器的多址通信系统,具有来自数字数据流的调制脉冲源; 初始滤波器,其将输入的调制脉冲整形为期望的脉冲以在通信介质上传输; 与初始滤波器相同的第二滤波器,其与离开通信介质的脉冲匹配;将调制脉冲流转换成原始数字数据流的检测器,以及设计有特定数学特性的信号,其使系统 高效并最小化通道之间的串扰。 信号以高于1 / x的速率从中心波瓣迅速衰减,并且自相关函数的零点具有高阶多项式。 系统的类型允许多个数据流的复用具有更大的灵活性,鲁棒性和密度。