-
公开(公告)号：US20150180343A1
公开(公告)日：2015-06-25
申请号：US14414861
申请日：2012-07-27
申请人： Oscar Persson , Xuefeng Yang , Magnus Karlsson
发明人： Oscar Persson , Xuefeng Yang , Magnus Karlsson
IPC分类号： H02M3/158
CPC分类号： H02M3/1588 , H02M1/36 , H02M3/1584 , H02M3/285 , H02M3/33592 , Y02B70/1466 , Y02B70/1475
摘要： A method and a control unit for changing a working mode of a synchronous rectifier. The synchronous rectifier comprises at least one controllable switch having a diode in parallell thereof. The synchronous rectifier is operatively connected to a reactive circuit, and is arranged to receive at least one control signal at a control terminal, for controlling at least one controllable switch. The at least one control signal is pulse-width modulated with a defined duty-cycle. The method comprises adjusting the pulse-width of the at least one control signal between zero percent duty-cycle and the defined duty-cycle at a frequency above a cut-off frequency of the reactive circuit. Thereby, reducing the effect of a forward voltage drop over said diode in the synchronous rectifier.
摘要翻译： 一种用于改变同步整流器的工作模式的方法和控制单元。 同步整流器包括至少一个具有并联二极管的可控开关。 同步整流器可操作地连接到无功电路，并被布置成在控制端接收至少一个控制信号，用于控制至少一个可控开关。 所述至少一个控制信号以限定的占空比进行脉冲宽度调制。 该方法包括以高于无功电路的截止频率的频率调整零百分比占空比与限定占空比之间的至少一个控制信号的脉冲宽度。 从而减少同步整流器中所有二极管的正向压降的影响。
-
公开(公告)号：US08887299B2
公开(公告)日：2014-11-11
申请号：US12522989
申请日：2007-12-11
申请人： Yi Wang , Zhi Tang , Dengsha Yuan , Xuefeng Yang
发明人： Yi Wang , Zhi Tang , Dengsha Yuan , Xuefeng Yang
CPC分类号： G06F21/10 , G06F21/57 , G06F2221/2137 , G06F2221/2151
摘要： A digital content rights management method and system belongs to the digital content rights management technique field. The method of the invention includes the steps: registering the system, generating the time stamp, verifying the time stamp when the system starts up, acquiring the certificate, verifying the time before accessing the digital content. The system of the invention comprises a device for accessing the digital content and a server, wherein the device for accessing the digital content comprises: a registering module, a time stamp generating module, a time stamp verification module, a certificate of authorization acquiring module, and a time verification module. The method and system have solved the problem that the digital content can still be used beyond the time limit.
摘要翻译： 数字内容权限管理方法和系统属于数字内容权限管理技术领域。 本发明的方法包括以下步骤：登录系统，生成时间戳，验证系统启动时的时间戳，获取证书，验证访问数字内容之前的时间。 本发明的系统包括用于访问数字内容的设备和服务器，其中用于访问数字内容的设备包括：注册模块，时间戳生成模块，时间戳验证模块，授权获取模块证书， 和时间验证模块。 该方法和系统解决了数字内容超出时限的问题。
-
公开(公告)号：US20100086130A1
公开(公告)日：2010-04-08
申请号：US12522989
申请日：2007-12-11
申请人： Yi Wang , Zhi Tang , Dengsha Yuan , Xuefeng Yang
发明人： Yi Wang , Zhi Tang , Dengsha Yuan , Xuefeng Yang
CPC分类号： G06F21/10 , G06F21/57 , G06F2221/2137 , G06F2221/2151
摘要： A digital content rights management method and system belongs to the digital content rights management technique field. The method of the invention includes the steps: registering the system, generating the time stamp, verifying the time stamp when the system starts up, acquiring the certificate, verifying the time before accessing the digital content. The system of the invention comprises a device for accessing the digital content and a server, wherein the device for accessing the digital content comprises: a registering module, a time stamp generating module, a time stamp verification module, a certificate of authorization acquiring module, and a time verification module. The method and system have solved the problem that the digital content can still be used beyond the time limit.
摘要翻译： 数字内容权限管理方法和系统属于数字内容权限管理技术领域。 本发明的方法包括以下步骤：登录系统，生成时间戳，验证系统启动时的时间戳，获取证书，验证访问数字内容之前的时间。 本发明的系统包括用于访问数字内容的设备和服务器，其中，用于访问数字内容的设备包括：注册模块，时间戳生成模块，时间戳验证模块，授权获取模块证书， 和时间验证模块。 该方法和系统解决了数字内容超出时限的问题。
-
公开(公告)号：US20230127312A1
公开(公告)日：2023-04-27
申请号：US17752765
申请日：2022-05-24
申请人： Xuefeng Yang
发明人： Xuefeng Yang
摘要： The invention discloses a novel efficient power generation device of tide-wave energy, comprising a floating body provided on the sea surface, a support device provided on the coast, and a lever device connecting the floating body with the support device; the lever device comprises a force transmission rod and a main lever provided with a connecting device; the power generation device comprises a driving device, one end of which is connected with the connecting device to rotate the driving device and the other end is connected with the external electric motor device. The invention enables the up-and-down motions of the floating body through the acting force of the tide, to drive the up-and-down motion of the force transmission rod. The lever device connected with the support device by hinge, rotates the driving device through the connecting device, to rotate the external electric motor device to provide electric power.
-
-
-
搜索结果
4 条记录 (耗时 0.009 秒)
