公开(公告)号：US20070268002A1

公开(公告)日：2007-11-22

申请号：US11637336

申请日：2006-12-12

申请人： Huang Guang ,  Jian Liu ,  Li Hua ,  Brian Gaza ,  Robert Wentink

发明人： Huang Guang ,  Jian Liu ,  Li Hua ,  Brian Gaza ,  Robert Wentink

IPC分类号： H02P9/00

CPC分类号： F03D7/0244 ,  F03D7/0272 ,  F05B2270/1011 ,  F05B2270/304 ,  F05B2270/327 ,  H02P9/006 ,  H02P9/06 ,  H02P9/305 ,  H02P2101/15 ,  Y02E10/723

摘要： A protection circuit for a wind turbine generator that includes a PWM Brake that works in conjunction with known Brake Relays is disclosed. The Brake Relay is used to short the generator output terminals at a first threshold voltage. The PWM Brake includes one or more switching devices, coupled across the generator output. The PWM Brake is under the control of a PWM Brake Control Circuit which actuates the PWM Brake at a second threshold voltage that is relatively lower than the first threshold voltage. In accordance with an important aspect of the invention, the PWM Brake Control Circuit includes a novel speed sensing circuit for providing a signal representative of the speed of the turbine generator The novel speed sensing circuit eliminates the need to mount a speed sensor on the pole top mounted turbine generator. As such, the need for adding cabling from the pole top mounted wind turbine generator is eliminated. The novel speed sensing circuit provides a signal representative of the rotational speed of the turbine generator based upon the duty cycle of a pulse width modulated (PWM) signal that is derived from the drive signal developed by the PWM Control Circuit. This signal is used to alternatively actuate and close the Brake Relay to minimize actuation of the centrifugal switch.

摘要翻译： 公开了一种用于风力涡轮发电机的保护电路，其包括与已知的制动继电器相结合的PWM制动器。 制动继电器用于将发电机输出端子以第一阈值电压进行短路。 PWM制动器包括耦合在发电机输出端的一个或多个开关装置。 PWM制动器在PWM制动控制电路的控制下，该PWM制动控制电路以相对低于第一阈值电压的第二阈值电压来致动PWM制动。 根据本发明的一个重要方面，PWM制动控制电路包括一个新的速度检测电路，用于提供代表涡轮发电机转速的信号。新的速度检测电路消除了在极顶上安装速度传感器的需要 安装的涡轮发电机。 因此，消除了从极顶安装的风力涡轮发电机添加电缆的需要。 基于由PWM控制电路开发的驱动信号导出的脉冲宽度调制（PWM）信号的占空比，新颖的速度感测电路提供代表涡轮发电机转速的信号。 该信号用于交替地致动和关闭制动继电器以使离心开关的致动最小化。

公开(公告)号：US20050275381A1

公开(公告)日：2005-12-15

申请号：US10897285

申请日：2004-07-22

申请人： Huang Guang ,  Xia Jie ,  Li Hua ,  Robert Wentink

发明人： Huang Guang ,  Xia Jie ,  Li Hua ,  Robert Wentink

IPC分类号： H02J7/00 ,  H02J7/02 ,  H02J7/14

CPC分类号： H02J7/0006 ,  H02J7/0052 ,  H02J7/022

摘要： A battery charger with a discrete switched regulator provides relatively high efficiency and relatively low cost. Unlike known battery chargers which incorporate switched regulator ICs, the battery charger in accordance with the present invention utilizes the microprocessor for a dual function. In particular, the microprocessor not only controls the charging characteristics of the battery charging circuit but also directly controls the power output of the battery charger by direct control of the discrete switched regulator circuit. By using a discrete switched regulator circuit and redefining the role of the microprocessor, the battery charger in accordance with the present invention is relatively less expensive than known battery chargers which incorporate switched regulator ICs.

摘要翻译： 具有分立开关稳压器的电池充电器提供相对较高的效率和相对较低的成本。 与具有开关式调节器IC的已知电池充电器不同，根据本发明的电池充电器利用微处理器实现双重功能。 特别地，微处理器不仅控制电池充电电路的充电特性，而且还通过直接控制离散开关调节器电路来直接控制电池充电器的功率输出。 通过使用分立的开关调节器电路并重新定义微处理器的作用，根据本发明的电池充电器相对于已知的具有开关稳压器IC的电池充电器相对较便宜。

公开(公告)号：US20080024090A1

公开(公告)日：2008-01-31

申请号：US11836946

申请日：2007-08-10

申请人： Huang Guang ,  Robert Wentink ,  Xia Jie ,  Li Hua

发明人： Huang Guang ,  Robert Wentink ,  Xia Jie ,  Li Hua

IPC分类号： H02J7/00

CPC分类号： H02J7/0086 ,  H02J7/0077 ,  Y02B40/90 ,  Y02E70/40

摘要： A rapid charging circuit for a lithium ion battery. The battery charger in accordance with the present invention compensates for the voltage drops across the various resistance elements in the battery circuit by setting the charging voltage to a level to compensate for the initial resistance of the series resistances in the circuit and an additional resistance selected to take into account the anticipated increase in resistance of the various circuit elements over time. The battery charger in accordance with the present invention periodically monitors the open-circuit voltage of the battery cell and reduces the charging voltage to when the battery cell voltage reaches the optimal value. Thus, during a constant current charging mode, the battery cell is driven at a relatively optimal charging current to reduce the charging time. As such, the system is able to optimize the charging current supplied to a battery cell during a constant current mode of operation while compensating for circuit elements whose resistance may vary over time due to temperature or other factors, such as corrosion, while at the same time avoiding exceeding the maximum recommended voltage for the battery cell.

公开(公告)号：US20080012533A1

公开(公告)日：2008-01-17

申请号：US11836961

申请日：2007-08-10

申请人： Huang Guang ,  Robert Wentink ,  Xia Jie ,  Li Hua

发明人： Huang Guang ,  Robert Wentink ,  Xia Jie ,  Li Hua

IPC分类号： H02J7/00

CPC分类号： H02J7/0086 ,  H02J7/0077 ,  Y02B40/90 ,  Y02E70/40

摘要： A rapid charging circuit for a lithium ion battery. The battery charger in accordance with the present invention compensates for the voltage drops across the various resistance elements in the battery circuit by setting the charging voltage to a level to compensate for the initial resistance of the series resistances in the circuit and an additional resistance selected to take into account the anticipated increase in resistance of the various circuit elements over time. The battery charger in accordance with the present invention periodically monitors the open-circuit voltage of the battery cell and reduces the charging voltage to when the battery cell voltage reaches the optimal value. Thus, during a constant current charging mode, the battery cell is driven at a relatively optimal charging current to reduce the charging time. As such, the system is able to optimize the charging current supplied to a battery cell during a constant current mode of operation while compensating for circuit elements whose resistance may vary over time due to temperature or other factors, such as corrosion, while at the same time avoiding exceeding the maximum recommended voltage for the battery cell.

摘要翻译： 一种用于锂离子电池的快速充电电路。 根据本发明的电池充电器通过将充电电压设置为补偿电路中的串联电阻的初始电阻的电平来补偿电池电路中的各种电阻元件上的电压降，并且将额外的电阻选择为 考虑到随着时间的推移，各种电路元件的电阻的预期增加。 根据本发明的电池充电器周期性地监测电池单元的开路电压，并且当电池电池电压达到最佳值时将充电电压降低。 因此，在恒定电流充电模式期间，以相对最佳的充电电流驱动电池单元以减少充电时间。 因此，该系统能够在恒定电流工作模式期间优化提供给电池单体的充电电流，同时补偿电阻可能由于温度或其他因素（例如腐蚀）而随时间而变化的电路元件，同时 时间避免超过电池单元的最大推荐电压。

公开(公告)号：US20070075682A1

公开(公告)日：2007-04-05

申请号：US11241718

申请日：2005-09-30

申请人： Huang Guang ,  Robert Wentink ,  Xia Jie ,  Li Hua

发明人： Huang Guang ,  Robert Wentink ,  Xia Jie ,  Li Hua

IPC分类号： H02J7/00

CPC分类号： H02J7/0086 ,  H02J7/0077 ,  Y02B40/90 ,  Y02E70/40

摘要： A rapid charging circuit for a lithium ion battery. The battery charger in accordance with the present invention compensates for the voltage drops across the various resistance elements in the battery circuit by setting the charging voltage to a level to compensate for the initial resistance of the series resistances in the circuit and an additional resistance selected to take into account the anticipated increase in resistance of the various circuit elements over time. The battery charger in accordance with the present invention periodically monitors the open-circuit voltage of the battery cell and reduces the charging voltage to when the battery cell voltage reaches the optimal value. Thus, during a constant current charging mode, the battery cell is driven at a relatively optimal charging current to reduce the charging time. As such, the system is able to optimize the charging current supplied to a battery cell during a constant current mode of operation while compensating for circuit elements whose resistance may vary over time due to temperature or other factors, such as corrosion, while at the same time avoiding exceeding the maximum recommended voltage for the battery cell.

摘要翻译： 一种用于锂离子电池的快速充电电路。 根据本发明的电池充电器通过将充电电压设置为补偿电路中的串联电阻的初始电阻的电平来补偿电池电路中的各种电阻元件上的电压降，并且将额外的电阻选择为 考虑到随着时间的推移，各种电路元件的电阻的预期增加。 根据本发明的电池充电器周期性地监测电池单元的开路电压，并且当电池电池电压达到最佳值时将充电电压降低。 因此，在恒定电流充电模式期间，以相对最佳的充电电流驱动电池单元以减少充电时间。 因此，该系统能够在恒定电流工作模式期间优化提供给电池单体的充电电流，同时补偿电阻可能由于温度或其他因素（例如腐蚀）而随时间而变化的电路元件，同时 时间避免超过电池单元的最大推荐电压。

公开(公告)号：US20050275373A1

公开(公告)日：2005-12-15

申请号：US10863920

申请日：2004-06-09

申请人： Huang Guang ,  Li Hua ,  Robert Wentink

发明人： Huang Guang ,  Li Hua ,  Robert Wentink

IPC分类号： H02J7/00 ,  H02J7/02 ,  H02J7/14

CPC分类号： H02J7/0013 ,  H02J7/00 ,  H02J7/0006 ,  H02J7/022

摘要： A multiple cell battery charger configured with a parallel topography is disclosed. In accordance with an important aspect of the invention, the multiple cell battery charger requires fewer active components than known battery chargers while at the same time protecting multiple battery cells from overcharge and discharge. The multiple cell battery charger in accordance with the present invention is a constant voltage battery charger that includes a regulator for providing a regulated source of direct current (DC) voltage to the battery cells to be charged. In accordance with the present invention, each battery cell is connected in series with a switching device, such as a field effect transistor (FET) and optionally a current sensing device. In a charging mode, the serially connected FET conducts, thus enabling the battery cell to be charged. The battery voltage is sensed by a microprocessor. When the microprocessor senses that the battery cell is fully charged, the FET is turned off, thus disconnecting the battery cell from the circuit. Since the battery cell is disconnected from the circuit, no additional active devices are required to protect the battery cell from discharge. As such, a single active device per cell, such as the FET, provides multiple functions without requiring additional devices. Accordingly, the battery charger in accordance with the present invention utilizes fewer active components than known battery chargers and is thus much less be expensive to manufacture.

摘要翻译： 公开了一种配置有平行形貌的多单元电池充电器。 根据本发明的重要方面，多节电池充电器比已知的电池充电器需要更少的有源元件，同时保护多个电池单元免于过充电和放电。 根据本发明的多节电池充电器是一种恒压电池充电器，其包括用于向要充电的电池单元提供稳压的直流（DC）电压源的调节器。 根据本发明，每个电池单元与诸如场效应晶体管（FET）和可选的电流感测装置的开关装置串联连接。 在充电模式中，串联的FET导通，从而使得电池单元被充电。 电池电压由微处理器感测。 当微处理器感测到电池单体完全充电时，FET被关闭，从而将电池单元从电路断开。 由于电池单元与电路断开连接，不需要额外的有源器件来保护电池单元免于放电。 因此，每个单元（例如FET）的单个有源器件提供多种功能，而不需要额外的器件。 因此，根据本发明的电池充电器比已知的电池充电器使用更少的有源元件，因此制造成本较低。

公开(公告)号：US20050275369A1

公开(公告)日：2005-12-15

申请号：US10896654

申请日：2004-07-22

申请人： Huang Guang ,  Li Hua ,  Robert Wentink

发明人： Huang Guang ,  Li Hua ,  Robert Wentink

IPC分类号： H02J7/00 ,  H02J7/02 ,  H02J7/14

CPC分类号： H02J7/0006 ,  H02J7/022

摘要： A battery charger that is configured to charge different size battery cells and automatically determine the size of the battery cell to be charged. The battery charger includes at least one charging circuit and a microprocessor. The charging circuit, in turn, includes a serially connected switching device and a current sensing resistor and a first and second pair of battery terminals that are configured to receive different size battery cells. The first pair of battery terminals is serially connected to a size detection resistor. The serial combination of the first pair of battery terminals and the size detection resistor is connected in parallel with a second pair of battery terminals. The parallel combination is connected in series with the charging circuit. At a nominal charging current, the voltage at the battery terminals will vary by the voltage drop across the size detection resistor. Accordingly, by measuring the voltage at the battery terminals, the system can determine which pair of battery terminals is connected to a battery cell. By configuring the first pair of battery terminals to receive a first battery cell size, for example, size AAA, and serially coupling the first pair of battery terminals to the size detection resistor, and configuring the second pair of battery terminals to receive a second size of battery cell, for example, size AA, the battery cell size can easily be detected electronically by measuring the voltage at the battery terminals.

摘要翻译： 配置为对不同尺寸的电池单元充电并自动确定要充电的电池单元的尺寸的电池充电器。 电池充电器包括至少一个充电电路和微处理器。 充电电路又包括串联连接的开关装置和电流检测电阻器以及配置成接收不同尺寸的电池单元的第一和第二对电池端子。 第一对电池端子串联连接到尺寸检测电阻。 第一对电池端子和尺寸检测电阻器的串联组合与第二对电池端子并联连接。 并联组合与充电电路串联连接。 在额定充电电流下，电池端子上的电压将随着尺寸检测电阻的电压降而变化。 因此，通过测量电池端子的电压，系统可以确定哪一对电池端子连接到电池单元。 通过配置第一对电池端子以接收第一电池单元尺寸，例如尺寸AAA，并且将第一对电池端子串联耦合到尺寸检测电阻器，以及配置第二对电池端子以接收第二尺寸 的电池单元，例如尺寸AA，可以通过测量电池端子处的电压来容易地以电子方式检测电池单元尺寸。

公开(公告)号：US20130346513A1

公开(公告)日：2013-12-26

申请号：US13531399

申请日：2012-06-22

申请人： Hongzhong Jia ,  Xiaojun Liang ,  Li Hua ,  Goranka Bjedov

发明人： Hongzhong Jia ,  Xiaojun Liang ,  Li Hua ,  Goranka Bjedov

IPC分类号： G06F15/16

CPC分类号： H04L67/148 ,  H04L12/1813 ,  H04L51/04 ,  H04L67/1027 ,  H04L67/1036

摘要： Migrating a chat messaging service provided for a chat user is disclosed. At a second chat server from a first chat server, static information associated with a chat user is received. The static information is received before the chat user is indicated as being associated with a migration state. At the second chat server from the first chat server, dynamic information associated with the chat user is received. At least a portion of the dynamic information is received after the chat user is indicated as being associated with the migration state. After the chat user is no longer indicated as being associated with the migration state, a chat message for the chat user is received at the second chat server.

摘要翻译： 公开了为聊天用户提供的聊天消息服务的迁移。 在来自第一聊天服务器的第二聊天服务器处，接收与聊天用户相关联的静态信息。 在聊天用户被指示为与迁移状态相关联之前接收静态信息。 在来自第一聊天服务器的第二聊天服务器处，接收与聊天用户相关联的动态信息。 在将聊天用户指示为与迁移状态相关联之后，接收至少一部分动态信息。 在聊天用户不再被指示为与迁移状态相关联之后，在第二聊天服务器处接收到聊天用户的聊天消息。

公开(公告)号：US20130258042A1

公开(公告)日：2013-10-03

申请号：US13435185

申请日：2012-03-30

申请人： Wang Shun ,  Li Hua ,  Zhou Ziyu ,  Wang Lianghui

发明人： Wang Shun ,  Li Hua ,  Zhou Ziyu ,  Wang Lianghui

IPC分类号： H04N7/15

CPC分类号： H04N7/152 ,  H04L12/1827 ,  H04L67/22

摘要： In an online conference session involving a presenter at an endpoint device and a plurality of attendees at respective endpoint devices, screenshots of content displayed at the endpoint device of the presenter and content displayed at the endpoint devices of each of the attendees are captured on a periodic basis. First data is stored that represents screenshots of content displayed at the endpoint device of the presenter and of content displayed at the endpoint devices of each of the attendees for each screenshot capture instance. Second data is stored that represents captured screenshots at each of a plurality of screenshot capture instances at the endpoint device for each attendee during the conference session. An attention metric is generated for one or more attendees based on the first data and second data.

摘要翻译： 在涉及终端设备的演示者和相应端点设备的多个与会者的在线会议会话中，在演示者的端点设备上显示的内容的屏幕截图和每个参加者的终端设备上显示的内容被捕获在周期性 基础。 存储第一数据，其表示在每个截图捕捉实例的每个参加者的终端设备处显示的内容的屏幕截图和在每个参与者的端点设备处显示的内容。 存储在会议会话期间为每个参与者在端点设备处的多个屏幕截图捕获实例的每一个处表示捕获的截图的第二数据。 基于第一数据和第二数据为一个或多个与会者生成关注度量。

公开(公告)号：US20120252504A1

公开(公告)日：2012-10-04

申请号：US13076438

申请日：2011-03-31

申请人： Yosef Firstenberg ,  Li Hua

发明人： Yosef Firstenberg ,  Li Hua

IPC分类号： H04W4/02

CPC分类号： H04W4/021 ,  H04W4/21 ,  H04W4/60

摘要： The claimed subject matter provides a method for publishing location information. The method includes receiving the location information from an entity. The entity may be associated with a geographic location. The method further includes identifying one or more entities to be notified of the location information. Additionally, the method includes sending the location information to the identified entities.

摘要翻译： 所要求保护的主题提供了发布位置信息的方法。 该方法包括从实体接收位置信息。 实体可以与地理位置相关联。 该方法还包括识别要被通知位置信息的一个或多个实体。 另外，该方法包括将位置信息发送到所识别的实体。