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1. 发明申请

US20080224788A1 Method and Apparatus for Pulse width Modulation in a Switching Amplifier 有权
标题翻译：用于开关放大器中脉宽调制的方法和装置
公开(公告)号：US20080224788A1
公开(公告)日：2008-09-18
申请号：US11913113
申请日：2006-05-04
申请人： Sang Jin Park , Yong Hun Cho , Yun Do Kim
发明人： Sang Jin Park , Yong Hun Cho , Yun Do Kim
IPC分类号： H03K7/08
CPC分类号： H04L25/4902 , H03F3/217 , H03K7/08
摘要： There is provided a method and apparatus for output pulse width modulation in a digital amplifier including: a determining step of adding or subtracting a value corresponding to a predetermined offset to or from an input audio signal alternately according to a period of the input audio signal, thereby determining a sign of a resulting value of adding or subtracting; a switching step of outputting the input audio signal to a first port when the determined sign is positive, and outputting the input audio signal to a second port after inverting the input audio signal into a positive number when the determined sign is negative; an adjusting step of adding a value corresponding to a pulse width for a minimum time required for switching to the audio signals output from the first port and the second port, and outputting a resulting value of adding; and a modulating step of performing pulse width modulation on the audio signals output from the adjusting step and outputting a first modulation signal and a second modulation signal. Accordingly, it is possible to reduce residual noises output from the switching amplifier and bias currents applied to load, so that heat generation decreases and amplification efficiency increases.
摘要翻译：提供了一种数字放大器输出脉冲宽度调制方法和装置，包括：根据输入音频信号的周期交替地向输入音频信号输入或从输入音频信号中减去与预定偏移相对应的值的确定步骤，从而确定加法或减法的结果值的符号; 切换步骤，当确定的符号为正时，将输入的音频信号输出到第一端口，并且当所确定的符号为负时，将输入的音频信号输出到第二端口，将输入的音频信号反相为正数; 调整步骤，将与从所述第一端口和所述第二端口输出的音频信号切换所需的最小时间相对应的脉冲宽度的值相加，并输出所得到的加法值; 以及对从调整步骤输出的音频信号进行脉宽调制并输出第一调制信号和第二调制信号的调制步骤。因此，可以减少从开关放大器输出的残余噪声和施加到负载的偏置电流，使得发热降低并且放大效率增加。

2. 发明授权

US07724082B2 Method and apparatus for pulse width modulation in a switching amplifier 有权
标题翻译：开关放大器中的脉宽调制方法和装置
公开(公告)号：US07724082B2
公开(公告)日：2010-05-25
申请号：US11913113
申请日：2006-05-04
申请人： Sang Jin Park , Yong Hun Cho , Yun Do Kim
发明人： Sang Jin Park , Yong Hun Cho , Yun Do Kim
IPC分类号： H03F3/38
CPC分类号： H04L25/4902 , H03F3/217 , H03K7/08
摘要： There is provided a method and apparatus for output pulse width modulation in a digital amplifier including: a determining step of adding or subtracting a value corresponding to a predetermined offset to or from an input audio signal alternately according to a period of the input audio signal, thereby determining a sign of a resulting value of adding or subtracting; a switching step of outputting the input audio signal to a first port based on the determined sign, or outputting the input audio signal to a second port after inverting the input audio signal into a positive number; an adjusting step of adding a value of a predetermined switching time to the audio signals output from the first port and the second port, and outputting a resulting value of adding; and a modulating step of performing pulse width modulation on the audio signals output from the adjusting step and outputting a first modulation signal and a second modulation signal.
摘要翻译：提供了一种数字放大器输出脉冲宽度调制方法和装置，包括：根据输入音频信号的周期交替地向输入音频信号输入或从输入音频信号中减去与预定偏移相对应的值的确定步骤，从而确定加法或减法的结果值的符号; 切换步骤，基于所确定的符号将输入音频信号输出到第一端口，或者在将输入音频信号反转为正数之后将输入音频信号输出到第二端口; 调整步骤，对从所述第一端口和所述第二端口输出的音频信号添加预定切换时间的值，并输出所得到的加法值; 以及对从调整步骤输出的音频信号进行脉宽调制并输出第一调制信号和第二调制信号的调制步骤。

3. 发明授权

US5833442A Scroll-type compressor having improved pressure equalizing passage configuration 失效
标题翻译：涡旋式压缩机具有改善的压力平衡通道构型
公开(公告)号：US5833442A
公开(公告)日：1998-11-10
申请号：US751018
申请日：1996-11-15
申请人： Wan Pyo Park , Hiun Won , Do Sig Choi , Yong Hun Cho
发明人： Wan Pyo Park , Hiun Won , Do Sig Choi , Yong Hun Cho
IPC分类号： F04C27/00 , F04C18/04
CPC分类号： F04C27/005
摘要： A scroll-type compressor has a scroll plate with at least first and second pressure equalizing passages formed in its end plate such that the first and second pressure equalizing passages will be in the same crescent shaped pocket during at least a portion of a crescent shaped pocket's radially inward movement. The minimum pressure in a back pressure pocket will be adequate to maintain a good seal, any pressure increases will increase in accordance with the increased pressure in the crescent shaped pockets. At no point are both of the pressure equalizing passages blocked and, therefore, the pressure in the interior space does not overwhelm the effective functioning of the back pressure pocket.
摘要翻译：涡旋式压缩机具有涡旋板，其具有形成在其端板中的至少第一和第二压力平衡通道，使得第一和第二压力平衡通道在新月形口袋的至少一部分期间将在相同的新月形口袋中径向向内运动。背压袋中的最小压力将足以保持良好的密封，任何压力增加将根据新月形口袋中增加的压力而增加。在任何时候压力平衡通道都不会阻塞，因此内部空间中的压力不会压倒背压袋的有效功能。

4. 发明授权

US09203093B2 Fuel cell electrode 有权
标题翻译：燃料电池电极
公开(公告)号：US09203093B2
公开(公告)日：2015-12-01
申请号：US13176954
申请日：2011-07-06
申请人： Nak Hyun Kwon , In Chul Hwang , Jae Seung Lee , Bum Wook Roh , Yung Eun Sung , Ju Wan Lim , Yoon Hwan Cho , Nam Gee Jung , Hee Man Choe , Yong Hun Cho
发明人： Nak Hyun Kwon , In Chul Hwang , Jae Seung Lee , Bum Wook Roh , Yung Eun Sung , Ju Wan Lim , Yoon Hwan Cho , Nam Gee Jung , Hee Man Choe , Yong Hun Cho
IPC分类号： H01M4/86 , H01M4/88 , H01M8/10
CPC分类号： H01M4/8825 , H01M4/8807 , H01M4/8892 , H01M2008/1095 , Y02E60/50
摘要： The present invention provides an electrode for a polymer electrolyte membrane fuel cell. In one embodiment, a planar nanoporous or microporous metal foam or metal aerogel structure is provided, from which an electrode with a catalyst layer integrally formed by fixing a catalyst in the metal foam or metal aerogel is formed.
摘要翻译：本发明提供一种高分子电解质膜燃料电池用电极。在一个实施方案中，提供了一种平面纳米孔或微孔金属泡沫或金属气凝胶结构，其中形成通过在金属泡沫或金属气凝胶中固定催化剂而整体形成催化剂层的电极。

5. 发明申请

US20120244457A1 FUEL CELL ELECTRODE 有权
标题翻译：燃料电池
公开(公告)号：US20120244457A1
公开(公告)日：2012-09-27
申请号：US13176954
申请日：2011-07-06
申请人： Nak Hyun Kwon , In Chul Hwang , Jae Seung Lee , Bum Wook Roh , Yung Eun Sung , Ju Wan Lim , Yoon Hwan Cho , Nam Gee Jung , Hee Man Choe , Yong Hun Cho
发明人： Nak Hyun Kwon , In Chul Hwang , Jae Seung Lee , Bum Wook Roh , Yung Eun Sung , Ju Wan Lim , Yoon Hwan Cho , Nam Gee Jung , Hee Man Choe , Yong Hun Cho
IPC分类号： H01M4/70 , H01M4/88 , B05C13/02 , B05D5/12 , B05C11/00
CPC分类号： H01M4/8825 , H01M4/8807 , H01M4/8892 , H01M2008/1095 , Y02E60/50
摘要： The present invention provides an electrode for a polymer electrolyte membrane fuel cell. In one embodiment, a planar nanoporous or microporous metal foam or metal aerogel structure is provided, from which an electrode with a catalyst layer integrally formed by fixing a catalyst in the metal foam or metal aerogel is formed.
摘要翻译：本发明提供一种高分子电解质膜燃料电池用电极。在一个实施方案中，提供了一种平面纳米孔或微孔金属泡沫或金属气凝胶结构，其中形成通过在金属泡沫或金属气凝胶中固定催化剂而整体形成催化剂层的电极。

6. 发明申请

US20090005237A1 Method for preparing the mixed electrode catalyst materials for a PEM fuel cell 有权
标题翻译：制备PEM燃料电池用混合电极催化剂材料的方法
公开(公告)号：US20090005237A1
公开(公告)日：2009-01-01
申请号：US11985810
申请日：2007-11-16
申请人： Nak Hyun Kwon , Yung Eun Sung , In Su Park , Yong Hun Cho , In Chul Hwang , Il Hee Cho
发明人： Nak Hyun Kwon , Yung Eun Sung , In Su Park , Yong Hun Cho , In Chul Hwang , Il Hee Cho
IPC分类号： H01M4/88
CPC分类号： H01M4/921 , H01M4/926 , H01M2008/1095
摘要： The present invention relates to a process for preparing electrode catalyst materials for a polymer electrolyte membrane fuel cell (PEMFC), and particularly to a high-performance platinum-non-platinum mixed electrode catalyst (Pt—RuOs/C) having a physically mixed structure of RuOs alloy and platinum materials, which is prepared by adding a small amount of platinum (Pt) to RuOs alloy materials highly dispersed on a carbon support, where the amount of platinum used is drastically reduced as compared to the conventional platinum materials, thus lowering the manufacturing cost.
摘要翻译：本发明涉及一种制备聚合物电解质膜燃料电池（PEMFC）的电极催化剂材料的方法，特别涉及具有物理混合结构的高性能铂 - 非铂混合电极催化剂（Pt-RuO / C）的RuO合金和铂材料，其通过向高度分散在碳载体上的RuO合金材料添加少量铂（Pt）而制备，其中与常规铂材料相比，所使用的铂的量显着降低，因此降低制造成本。

7. 发明授权

US06888403B2 Pulse width modulation type audio amplifier having variable average switching frequency 失效
标题翻译：具有可变平均开关频率的脉宽调制型音频放大器
公开(公告)号：US06888403B2
公开(公告)日：2005-05-03
申请号：US10222400
申请日：2002-08-16
申请人： Yong Hun Cho , Bong Joo Kim
发明人： Yong Hun Cho , Bong Joo Kim
IPC分类号： H03G1/00 , H03F3/217 , H03F3/38
CPC分类号： H03F3/217
摘要： The present invention relates to an audio amplifier using a pulse width modulation, and more particularly, to a pulse width modulation type audio amplifier which an average switching frequency or a cutoff frequency of a low pass filter is variable in accordance with frequency of input signal. The present invention has a method for using average switching frequency of an output pulse by lowering the average switching frequency in accordance with the bandwidth of the input audio signal for relative narrow bandwidth than that of an input audio signal having a usual bandwidth of 20 kHz like as a pulse width modulation type radio signal and a low bandwidth signal for a subwoofer, a method for lowering a cutoff frequency of a low pass filter for restoring an output pulse to a continuous time signal together an average switching frequency of the output pulse, and a method for using respective average switching frequencies different to each other for each channel having respective different bandwidths in a multi-channel amplifier. By using the average switching frequency as lower as possible in accordance with the bandwidth of the input audio signal, the power efficiency is enhanced and the electromagnetic interference affecting peripheral devices can be minimized.
摘要翻译：本发明涉及一种使用脉冲宽度调制的音频放大器，更具体地说，涉及一种根据输入信号的频率可变的低通滤波器的平均切换频率或截止频率可变的脉宽调制型音频放大器。本发明具有通过相对于具有20kHz的通常带宽的输入音频信号的带宽相对于相对窄带宽的输入音频信号的带宽来降低平均切换频率的方法来使用输出脉冲的平均切换频率，作为用于低音炮的脉冲宽度调制型无线电信号和低带宽信号，一种降低低通滤波器的截止频率的方法，用于将输出脉冲恢复为连续时间信号，一起输出脉冲的平均切换频率，以及一种在多声道放大器中对于具有各自不同带宽的每个声道使用彼此不同的各个平均切换频率的方法。通过根据输入音频信号的带宽尽可能地使用平均切换频率，提高了功率效率，并且能够使影响周边设备的电磁干扰最小化。

8. 发明申请

US20110318668A1 MEMBRANE-ELECTRODE ASSEMBLY FOR FUEL CELL, FUEL CELL AND MANUFACTURING THE METHOD THEREOF 审中-公开
标题翻译：用于燃料电池，燃料电池的膜电极组件及其制造方法
公开(公告)号：US20110318668A1
公开(公告)日：2011-12-29
申请号：US13073460
申请日：2011-03-28
申请人： Eon Soo Lee , Yung Eun Sung , Min Jeh Ahn , Yong Hun Cho , Nam Gee Jung , Jae Hyuk Jang
发明人： Eon Soo Lee , Yung Eun Sung , Min Jeh Ahn , Yong Hun Cho , Nam Gee Jung , Jae Hyuk Jang
IPC分类号： H01M8/04 , H01M8/00 , B05D5/12 , H01M8/10
CPC分类号： H01M4/8807 , H01M8/0232 , H01M8/0245 , H01M8/1004 , Y02P70/56
摘要： Disclosed herein are a membrane-electrode assembly for a fuel cell, a fuel cell, and a manufacturing method thereof. The present invention forms a micro current collecting layer between a gas diffusion layer and a micro porous layer and surface-contacts a pair of laminates for an electrode so that each electrolyte layer formed by applying an electrolyte solution thereon contacts with each other, thereby shortening a moving distance of electrons to minimize the current collecting resistance and loss and reduce the interface resistance.
摘要翻译：本文公开了一种用于燃料电池的膜 - 电极组件，燃料电池及其制造方法。本发明在气体扩散层和微孔层之间形成微电流收集层，并且与电极的一对层压体表面接触，使得通过施加电解质溶液形成的每个电解质层彼此接触，从而缩短电子的移动距离使集电电阻和损耗最小化，并降低界面电阻。

9. 发明授权

US07825057B2 Method for preparing the mixed electrode catalyst materials for a PEM fuel cell 有权
标题翻译：制备PEM燃料电池用混合电极催化剂材料的方法
公开(公告)号：US07825057B2
公开(公告)日：2010-11-02
申请号：US11985810
申请日：2007-11-16
申请人： Nak Hyun Kwon , Yung Eun Sung , In Su Park , Yong Hun Cho , In Chul Hwang , Il Hee Cho
发明人： Nak Hyun Kwon , Yung Eun Sung , In Su Park , Yong Hun Cho , In Chul Hwang , Il Hee Cho
IPC分类号： B01J23/40 , B01J23/74 , B01J23/00 , B01J23/42 , B01J23/44 , C22C5/04 , C22C30/00 , H01M4/88 , H01M4/00
CPC分类号： H01M4/921 , H01M4/926 , H01M2008/1095
摘要： The present invention relates to a process for preparing electrode catalyst materials for a polymer electrolyte membrane fuel cell (PEMFC), and particularly to a high-performance platinum-non-platinum mixed electrode catalyst (Pt—RuOs/C) having a physically mixed structure of RuOs alloy and platinum materials, which is prepared by adding a small amount of platinum (Pt) to RuOs alloy materials highly dispersed on a carbon support, where the amount of platinum used is drastically reduced as compared to the conventional platinum materials, thus lowering the manufacturing cost.
摘要翻译：本发明涉及一种制备聚合物电解质膜燃料电池（PEMFC）的电极催化剂材料的方法，特别涉及具有物理混合结构的高性能铂 - 非铂混合电极催化剂（Pt-RuO / C）的RuO合金和铂材料，其通过向高度分散在碳载体上的RuO合金材料添加少量铂（Pt）而制备，其中与常规铂材料相比，所使用的铂的量显着降低，因此降低制造成本。

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