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1. 发明申请

WO2008132509A3 BIPOLAR TRANSISTOR DRIVERS 审中-公开
标题翻译：双极晶体管驱动器
公开(公告)号：WO2008132509A3
公开(公告)日：2008-12-24
申请号：PCT/GB2008050300
申请日：2008-04-25
申请人： CAMBRIDGE SEMICONDUCTOR LTD , GARNER DAVID M , LALITHAMBIKA VINOD A , RYAN PAUL , JACQUES RUSSELL
发明人： GARNER DAVID M , LALITHAMBIKA VINOD A , RYAN PAUL , JACQUES RUSSELL
IPC分类号： H03K17/082
CPC分类号： H03K17/0422 , H02M3/33507 , H03F3/2171 , H03F3/45183 , H03F2203/45322 , H03F2203/45352 , H03F2203/45396 , H03F2203/45466 , H03F2203/45506 , H03K17/0406 , H03K17/0826 , H03K17/0828 , H03K17/567 , H03K17/64 , Y02B70/1433
摘要： We describe a switching power converter comprising a bipolar switching device (BJT or IGBT) switching an inductive load, and including a closed-loop control system. The control system comprises a voltage sensing system to sense a voltage on a collector terminal of the sw itching device and provide a voltage sense signal; a controller; and a drive modulation system coupled to an output of the controller for modulating a drive to the control terminal of said bipolar switching device responsive to a controller control signal; wherein said controller is configured to monitor changes in the sensed voltage during a period when said switching device is switched on and to control said drive modulation system to control the degree of saturation of said bipolar switching device when the device is switched on and hence improve turn-off times.
摘要翻译：我们描述了包括切换感性负载的双极开关器件（BJT或IGBT）以及包括闭环控制系统的开关功率转换器。该控制系统包括：电压感测系统，用于感测开关装置的集电极端子上的电压并提供电压感测信号; 控制器; 以及驱动调制系统，其耦合到所述控制器的输出端，用于响应于控制器控制信号来调制到所述双极开关装置的控制端子的驱动; 其中所述控制器被配置成监测所述开关装置接通期间的感测电压的变化，并且控制所述驱动调制系统以在所述装置接通时控制所述双极开关装置的饱和度并因此改善转向 - 时间。

2. 发明申请

WO2008120012A3 FORWARD POWER CONVERTER CONTROLLERS 审中-公开
标题翻译：前转换器控制器
公开(公告)号：WO2008120012A3
公开(公告)日：2008-11-27
申请号：PCT/GB2008050220
申请日：2008-03-27
申请人： CAMBRIDGE SEMICONDUCTOR LTD , JACQUES RUSSELL , RYAN PAUL , MCKAY CATRIONA , DE SILVA DEVARAHANDI INDIKA MA , GARNER DAVID M , LALITHAMBIKA VINOD A
发明人： JACQUES RUSSELL , RYAN PAUL , MCKAY CATRIONA , DE SILVA DEVARAHANDI INDIKA MAHESH , GARNER DAVID M , LALITHAMBIKA VINOD A
IPC分类号： H02M3/335 , H02M1/32
CPC分类号： H02M3/33538 , H02M1/32 , H02M3/33507 , Y02B70/1433
摘要： This invention relates to control techniques and controllers for resonant discontinuous forward power converters (RDFCs). A method of controlling a resonant discontinuous forward converter (RDFC), said converter including a transformer (702) with primary (702p) and secondary (702s) matched polarity windings and a switch (704) to, in operation, cyclically switch DC power to said primary winding (702p) of said transformer (702), said converter further having a DC output coupled to said secondary winding (702s) of said converter said method comprising: sensing a primary winding signal during an on period of said switch (704), said primary winding signal representing a current in said primary winding (702p), comparing said sensed primary winding signal wit a threshold value; and controlling one or both of an on and off duration of said switch (704) in response to said comparison.
摘要翻译：本发明涉及用于谐振不连续正向功率转换器（RDFC）的控制技术和控制器。一种控制谐振不连续正向转换器（RDFC）的方法，所述转换器包括具有初级（702p）和次级（702s）匹配极性绕组的变压器（702）和开关（704），以在操作中将DC电力循环地切换到所述转换器（702）的所述初级绕组（702p），所述转换器还具有耦合到所述转换器的所述次级绕组（702s）的DC输出，所述方法包括：在所述开关（704）的接通周期期间感测初级绕组信号，所述初级绕组信号表示所述初级绕组（702p）中的电流，将所述感测到的初级绕组信号与阈值进行比较; 以及响应于所述比较来控制所述开关（704）的接通和关断持续时间中的一个或两个。

3. 发明申请

WO2008132508A2 BIPOLAR TRANSISTOR DRIVERS 审中-公开
标题翻译：双极晶体管驱动器
公开(公告)号：WO2008132508A2
公开(公告)日：2008-11-06
申请号：PCT/GB2008050299
申请日：2008-04-25
申请人： CAMBRIDGE SEMICONDUCTOR LTD , RYAN PAUL , JACQUES RUSSELL
发明人： RYAN PAUL , JACQUES RUSSELL
IPC分类号： H03K17/082
CPC分类号： H03K17/567 , H03K17/04213 , H03K17/0422 , H03K17/0828 , H03K17/687 , H03K17/6877 , H03K17/691 , H03K2217/0036
摘要： We describe a methods of controlling the drive to a BJT or IGBT transistor to control the saturation of said transistor to achieve fast turn-off. An embodiment of the method comprises determining a quantity of charge in the transistor for a combination of collector current and a time for which said collector current flows, and delivering a pulse of current or voltage to a control terminal of said BJT or IGBT transistor such that a total quantity of charge delivered to a base of said BJT or to an internal base of said IGBT in said pulse of base or gate current or voltage is sufficient to maintain said collector current for said time and to sustain said transistor in saturation or quasi - saturation up to or after the end of said base current or gate voltage pulse until the end of said time.
摘要翻译：我们描述了控制到BJT或IGBT晶体管的驱动以控制所述晶体管的饱和以实现快速关断的方法。该方法的一个实施例包括确定晶体管中用于集电极电流和所述集电极电流流过的时间的组合的电荷量，并且向所述BJT或IGBT晶体管的控制端子传送电流或电压脉冲，使得在所述基极或栅极电流或电压脉冲中输送到所述BJT的基极或所述IGBT的内部基极的总电荷量足以维持所述时间的所述集电极电流并维持所述晶体管处于饱和或准 - 在所述基极电流或栅极电压脉冲结束之前或之后直到所述时间结束为止饱和。

4. 发明申请

WO2008132501A3 SWITCHING POWER CONVERTERS 审中-公开
标题翻译：切换电源转换器
公开(公告)号：WO2008132501A3
公开(公告)日：2008-12-24
申请号：PCT/GB2008050289
申请日：2008-04-24
申请人： CAMBRIDGE SEMICONDUCTOR LTD , RYAN PAUL
发明人： RYAN PAUL
IPC分类号： H02M3/156 , H02M1/32
CPC分类号： H02M3/156 , H02M1/32 , H02M3/335 , Y02B70/1425 , Y02B70/1433
摘要： We describe systems for forward power converters, in particular a bi - level current sense circuit to enable a single current sense input to provide two different current sense levels. The circuit comprises: a single current sense input connected to a current sense r esistor via a second resistor, for coupling in series with a power switch to generate a current sense signal for current through the switch; first and second comparators sharing a connection to the current sense input and having respective first and second outputs coupled to a controller, these being configured to compare a voltage on said shared input connection against different respective first and second threshold values; and a current generator coupled to said shared input connection. This enables third and fourth bi - level current sense threshold values to be set independently by said current sense and second resistors without changing said first and second threshold values.
摘要翻译：我们描述用于正向功率转换器的系统，特别是双电平电流检测电路，以使得单个电流检测输入能够提供两个不同的电流感测电平。该电路包括：通过第二电阻器连接到电流检测电阻器的单个电流感测输入，用于与电源开关串联耦合以产生用于通过开关的电流的电流感测信号; 第一和第二比较器共享与电流感测输入的连接，并且具有耦合到控制器的相应的第一和第二输出，这些被配置为将所述共享输入连接上的电压与不同的相应的第一和第二阈值进行比较; 以及耦合到所述共享输入连接的电流发生器。这使得能够由所述电流检测和第二电阻器独立设置第三和第四双电平电流检测阈值，而不改变所述第一和第二阈值。

5. 发明申请

WO2009010802A3 FORWARD POWER CONVERTERS 审中-公开
标题翻译：前向功率转换器
公开(公告)号：WO2009010802A3
公开(公告)日：2009-04-09
申请号：PCT/GB2008050583
申请日：2008-07-17
申请人： CAMBRIDGE SEMICONDUCTOR LTD , RYAN PAUL
发明人： RYAN PAUL
IPC分类号： H02M3/335
CPC分类号： H02M3/33553 , H02M3/33576 , Y02B70/1433
摘要： This invention relates to method s and apparatus for regulating the output voltage and/or current of switch mode power converter, in particular forward converters. A method of regulating the output voltage of a forward switch mode power converter, said power converter having a power input, a power output to provide said output voltage, a transformer with matched polarity primary and secondary windings coupled between said power input and said power output; and a switch to cyclically switch power from said power input on and off to said primary winding of said transformer to transfer power to said power output and a secondary side rectifier; the method comprising: sensing a voltage on said primary winding or on an auxiliary winding of said transformer during a period when said switch is of f and said secondary side rectifier is conducting; and controlling a proportion of time for which said switch is on, responsive to said sensing, to control said output voltage.
摘要翻译：本发明涉及用于调节开关模式功率转换器，特别是正激转换器的输出电压和/或电流的方法和装置。一种调节正向开关模式功率变换器的输出电压的方法，所述功率变换器具有功率输入，用于提供所述输出电压的功率输出，具有耦合在所述功率输入和所述功率输出之间的匹配极性初级和次级绕组的变压器 ; 以及开关，用于将来自所述电源输入的电力循环地切换到所述变压器的所述初级绕组以将电力传输到所述电力输出端和次级侧整流器; 所述方法包括：在所述开关为f且所述次级侧整流器导通期间感测所述初级绕组或所述变压器的辅助绕组上的电压; 以及响应于所述感测来控制所述开关接通的时间比例，以控制所述输出电压。

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