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15 条记录 (耗时 0.037 秒)

    Semiconductor flip chip ball grid array package
    3.
    发明授权
    Semiconductor flip chip ball grid array package 有权
    半导体倒装芯片球栅阵列封装

    公开(公告)号：US06266249B1

    公开(公告)日：2001-07-24

    申请号：US09375835

    申请日：1999-08-16

    申请人： Kishor V. Desai ,  Sunil Patel ,  Ramaswamy Ranganathan

    发明人： Kishor V. Desai ,  Sunil Patel ,  Ramaswamy Ranganathan

    IPC分类号： H05K118

    CPC分类号： H01L23/49827 ,  H01L2924/0002 ,  H01L2924/00

    摘要： A semiconductor package is present along with an associated method. The package comprises a substrate with a top surface and a bottom surface, the substrate having a plurality of electrically conductive vias extending from the top surface of the substrate to the bottom surface of the substrate. A semiconductor device having an active surface, the active surface having a plurality of bonding pads, is attached to the substrate by an adhesive that bas holes that align with the vias. The vias are also aligned with the bonding pads. Solder serves to electrically and mechanically couple each of the bonding pads with a corresponding via. Each of the vias, in turn, is coupled to a solder ball formed on the bottom of the substrate.

    摘要翻译： 存在半导体封装以及相关方法。 该封装包括具有顶表面和底表面的衬底，该衬底具有从衬底的顶表面延伸到衬底的底表面的多个导电通孔。 具有活性表面的半导体器件，具有多个接合焊盘的活性表面通过与通孔对准的基底孔的粘合剂附着到基底上。 通孔也与焊盘对准。 焊料用于将每个焊盘与相应的通孔电连接和机械耦合。 每个通孔又连接到形成在基底的底部上的焊球。

    Stepped-waveform inverter with eight subinverters
    4.
    发明授权
    Stepped-waveform inverter with eight subinverters 失效
    带八个次级换流器的步进波形逆变器

    公开(公告)号：US5040105A

    公开(公告)日：1991-08-13

    申请号：US454434

    申请日：1989-12-20

    申请人： P. John Dhyanchand ,  Sunil Patel ,  Chai-Nam Ng ,  Vietson Nguyen

    发明人： P. John Dhyanchand ,  Sunil Patel ,  Chai-Nam Ng ,  Vietson Nguyen

    IPC分类号： H02M7/48 ,  H02M7/49

    CPC分类号： H02M7/49

    摘要： An inverter for use in a variable-speed, constant-frequency power conversion system of the type used in an aircraft, for example, includes a four subinverter pairs, each of which generates a respective set of waveforms. The four subinverter pairs are connected to a summing transformer having eight sets pairs of primary windings and eight sets of secondary windings coupled to the primary windings. A regulator is coupled to the output of the summing transformer and varies the phase angles between the waveforms generated by the four subinverter pairs based upon the voltage and current at the output of the summing transformer in order to regulate the voltage at the output of the summing transformer.

    摘要翻译： 例如，用于在飞机上使用的类型的变速恒定频率功率转换系统中的逆变器包括四个子逆变器对，每个子反相器产生相应的一组波形。 四个副变换器对连接到具有八组初级绕组和八组次级绕组的求和变压器，该组绕组耦合到初级绕组。 调节器耦合到求和变压器的输出，并且基于在求和变压器的输出处的电压和电流来改变由四个副变换器对产生的波形之间的相位角，以便调节在求和的输出处的电压 变压器。

    Feedforward inverter phase control
    5.
    发明授权
    Feedforward inverter phase control 失效
    前馈逆变器相位控制

    公开(公告)号：US5301098A

    公开(公告)日：1994-04-05

    申请号：US911549

    申请日：1992-07-09

    申请人： P. John Dhyanchand ,  Vietson M. Nguyen ,  Sunil Patel ,  Chai-Nam Ng

    发明人： P. John Dhyanchand ,  Vietson M. Nguyen ,  Sunil Patel ,  Chai-Nam Ng

    IPC分类号： H02M7/537

    CPC分类号： H02M7/49 ,  H02M2001/0022

    摘要： An inverter system for inverting variable input DC and providing therefrom controlled output AC including a feedforward sensor for sensing a variable parameter of the input DC, a feedback AC sensor for sensing the controlled output AC and an inverter controller responsive to the variable parameter of the input DC and to the controlled output AC for regulating the magnitude of the controlled output AC.

    摘要翻译： 一种逆变器系统，用于反转可变输入DC并从其提供受控输出AC，其包括用于感测输入DC的可变参数的前馈传感器，用于感测受控输出AC的反馈AC传感器和响应于输入的可变参数的逆变器控制器 DC和控制输出AC，用于调节受控输出AC的幅度。

    Regulation circuit for a stepped-waveform inverter
    6.
    发明授权
    Regulation circuit for a stepped-waveform inverter 失效
    用于阶梯式波形逆变器的调节电路

    公开(公告)号：US5225973A

    公开(公告)日：1993-07-06

    申请号：US581924

    申请日：1990-09-13

    申请人： Sunil Patel ,  Chai-Nam Ng ,  Vietson Nguyen ,  P. John Dhyanchand

    发明人： Sunil Patel ,  Chai-Nam Ng ,  Vietson Nguyen ,  P. John Dhyanchand

    IPC分类号： H02M7/48 ,  H02M7/49

    CPC分类号： H02M7/49

    摘要： A regulator circuit for an inverter having first and second inverter sections that develop first and second AC waveforms which are phase displaced by a variable angle .alpha. wherein the first and second AC waveforms are combined to produce AC output power includes a reference signal generator that develops a reference signal having a transition between two states at a first time, a memory storing a plurality of words each representing a value of .alpha. add a circuit for accessing the memory with a deviation signal such that the memory provides a word at an output thereof. A counter is provided and a timing circuit causes the counter to load the word at a time prior to the first time. At the first time a gating circuit provides a plurality of clock pulses to a clock input of the counter whereby the counter decrements the loaded word as the clock pulses are received by the counter. A zero detect circuit and a one-shot coupled to the output of the counter produce a synchronization signal having a transition between two states at a second time subsequent to the first time when the loaded word is decremented to a particular value. The first and second inverter sections are controlled in accordance with the reference signal and the synchronization signal so that the parameter of the AC power is maintained substantially at a particular level.

    摘要翻译： 一种用于逆变器的调节器电路，具有第一和第二逆变器部分，该第一和第二逆变器部分形成第一和第二交流波形，该第一和第二交流波形被相移一个可变角度α，其中第一和第二交流波形被组合以产生交流输出功率包括： 参考信号在第一时间具有在两个状态之间的转变;存储器，存储多个字，每个字代表α的值，加上一个电路，用于利用偏移信号访问存储器，使得存储器在其输出端提供一个字。 提供一个计数器，并且定时电路使计数器在第一次之前的时间加载单词。 第一次门控电路向计数器的时钟输入提供多个时钟脉冲，由此当计数器接收时钟脉冲时，计数器递减所加载的字。 零检测电路和耦合到计数器的输出的单触发器产生同步信号，该同步信号在第一时间之后的第二时间具有两个状态之间的转换，当所加载的字被递减到特定值时。 根据参考信号和同步信号控制第一和第二逆变器部分，使得AC电力的参数基本保持在特定的水平。

    Stepped-waveform inverter with six subinverters
    7.
    发明授权
    Stepped-waveform inverter with six subinverters 失效
    带有六个次级换流器的步进波形逆变器

    公开(公告)号：US5041957A

    公开(公告)日：1991-08-20

    申请号：US453972

    申请日：1989-12-20

    申请人： P. John Dhyanchand ,  Sunil Patel ,  Chai-Nan Ng ,  Vietson Nguyen

    发明人： P. John Dhyanchand ,  Sunil Patel ,  Chai-Nan Ng ,  Vietson Nguyen

    IPC分类号： H02M7/48 ,  H02M7/49

    CPC分类号： H02M7/49

    摘要： An inverter for use in a power conversion system of the type used in an aircraft, for example, includes a first subinverter pair that generates a first pair of waveforms, a second subinverter pair that generates a second pair of waveforms, and a third subinverter pair that generates a third pair of waveforms. The three subinverter pairs are connected to a summing transformer having first, second and third transformers. A regulator is coupled to the output of the summing transformer and varies the phase angles between the three pairs of waveforms generated by the three subinverter pairs based upon the voltage and current at the output of the summing transformer in order to regulate the voltage at the output of the summing transformer.

    摘要翻译： 例如，在飞机中使用的类型的功率转换系统中使用的逆变器包括产生第一对波形的第一副变换器对，产生第二对波形的第二子逆变器对，以及产生第二副波形对的第二子逆变器对 产生第三对波形。 三个副变换器对连接到具有第一，第二和第三变压器的求和变压器。 调节器耦合到求和变压器的输出，并且基于在求和变压器的输出处的电压和电流来改变由三个副变换器对产生的三对波形之间的相位角，以便调节输出端的电压 的求和变压器。

    Power conversion system using a switched reluctance motor/generator
    8.
    发明授权
    Power conversion system using a switched reluctance motor/generator 失效
    使用开关磁阻电动机/发电机的电力转换系统

    公开(公告)号：US5012177A

    公开(公告)日：1991-04-30

    申请号：US452349

    申请日：1989-12-19

    申请人： P. John Dhyanchand ,  Sunil Patel ,  Chai-Nam Ng ,  Vietson Nguyen

    发明人： P. John Dhyanchand ,  Sunil Patel ,  Chai-Nam Ng ,  Vietson Nguyen

    IPC分类号： H02P9/40

    CPC分类号： H02P9/40 ,  H02P2101/30

    摘要： Prior power conversion system operable in generating and starting modes have utililzed brushless generators which are suitable for only certain applications. In order to overcome this problem, a power conversion system operable in generating and starting modes utilizes a switched reluctance motor/generator which is reliable and inexpensive and which can be used in a variety of environments.

    摘要翻译： 可用于生成和启动模式的现有电力转换系统具有仅适用于某些应用的无刷发电机。 为了克服这个问题，可以在生成和启动模式下操作的电力转换系统利用可靠且便宜并可用于各种环境的开关磁阻电机/发电机。