公开(公告)号：US06928936B1

公开(公告)日：2005-08-16

申请号：US10806066

申请日：2004-03-22

申请人： Ashis Mukherjee ,  Subhasis Biswas ,  Manish Kumar ,  Santi Gopal Sahu ,  Nandita Choudhury ,  Ashim Choudhury ,  Kalyan Sen

发明人： Ashis Mukherjee ,  Subhasis Biswas ,  Manish Kumar ,  Santi Gopal Sahu ,  Nandita Choudhury ,  Ashim Choudhury ,  Kalyan Sen

IPC分类号： F23H3/00 ,  F23K3/02

CPC分类号： F23K3/02

摘要： The present invention provides a device for feeding pulverized coal to a furnace, such as a drop tube furnace. The feeding system consists of a feed hopper, a pneumatic vibrator positioned on the periphery of the feeder hopper, a needle valve arrangement in the said feed hopper, a depth gauge micrometer, a distribution chamber with primary and secondary airline at the bottom of the said feed hopper. Adjusting the pressure of compressed air allows setting of the frequency of vibration of the pneumatic vibrator. The needle valve arrangement in conjunction with the vibratory hopper controls the feed rate. The rate of coal flow is measured by the depth gauge micrometer. The distribution chamber with primary and secondary airline at the bottom of the said feed hopper allows uniform mixing of air with coal before being charged into the furnace reactor.

摘要翻译： 本发明提供了一种用于将粉煤送入诸如滴管炉等炉的装置。 进料系统由进料斗，进料斗周边的气动振动器，所述进料斗中的针阀装置，深度计千分表组成，分配室具有位于所述进料斗底部的第一和第二航空公司 进料斗。 调节压缩空气的压力允许设定气动振动器的振动频率。 与振动漏斗配合的针阀装置控制进给速度。 煤流量由深度测微计测量。 在所述进料斗底部具有一级和二级航空公司的分配室允许空气与煤均匀混合，然后将其装入炉式反应器中。

公开(公告)号：US06841976B1

公开(公告)日：2005-01-11

申请号：US10317635

申请日：2002-12-12

申请人： Kalyan Sen ,  Mey Ling Sen

发明人： Kalyan Sen ,  Mey Ling Sen

IPC分类号： G05F1/70 ,  H02J3/18 ,  H02J3/24 ,  G05F1/100

CPC分类号： H02J3/1878 ,  G05F1/70 ,  H02J3/24 ,  Y02E40/30

摘要： A multi-line power flow transformer implements power flow control among multiple transmission lines in an n-phase power system. The transformer has an exciter unit with n primary windings. Each primary winding is on a core and receives a transmission voltage of a respective one of the phases of the power system. The transformer also has a series compensating unit for each transmission line. Each series compensating unit has n secondary windings on the core of each primary winding. Each secondary winding has a voltage induced thereon by the corresponding primary winding. For each phase, the secondary windings of the series compensating unit assigned to the phase are coupled in series to sum the induced voltages formed thereon. The summed voltage is a compensating voltage for the phase.

摘要翻译： 多线路电力变压器在n相电力系统中实现多条传输线路之间的功率流量控制。 变压器具有n个初级绕组的励磁单元。 每个初级绕组在一个磁芯上并且接收电力系统的各个相位的传输电压。 变压器还具有用于每条传输线的串联补偿单元。 每个串联补偿单元在每个初级绕组的芯上具有n个次级绕组。 每个次级绕组具有由相应的初级绕组在其上感应的电压。 对于每个相，分配给该相的串联补偿单元的次级绕组串联耦合以对其上形成的感应电压求和。 总和电压是相位的补偿电压。

公开(公告)号：US20060044847A1

公开(公告)日：2006-03-02

申请号：US10928657

申请日：2004-08-26

申请人： Gary Baumgart ,  Kalyan Sen

发明人： Gary Baumgart ,  Kalyan Sen

IPC分类号： H02M5/45

CPC分类号： H02M1/12 ,  H02J3/1814 ,  H02J3/1857 ,  H02M5/45 ,  Y02B70/1483 ,  Y02E40/18 ,  Y02E40/26

摘要： A control and regulation system for use with a harmonic neutralization frequency changer system. In the generalized frequency changer system, a direct converter frequency changer is used to convert bulk power, but unwanted harmonics are introduced. Input and output power distortion is monitored by a control system, and groups of high performance inverters inject shunt/series harmonic currents/voltages into a specially designed transformer to neutralize the power distortion to a specific acceptable level. Two control strategies are used including one that is based on discrete narrow band harmonic regulation and another that is based on wide band harmonic control. Each of these control strategies can be used at the input and/or output of the frequency changer and can be injected using shunt-current and series-voltage schemes.

摘要翻译： 一种用于谐波中和变频器系统的控制和调节系统。 在广义变频器系统中，直接转换器变频器用于转换大功率，但引入了不需要的谐波。 输入和输出功率失真由控制系统监控，高性能逆变器组将分流/串联谐波电流/电压注入专门设计的变压器，以将功率失真中和到特定的可接受水平。 使用两种控制策略，包括基于离散窄带谐波调节的控制策略，另一种基于宽带谐波控制。 这些控制策略中的每一个都可以用于变频器的输入和/或输出，并且可以使用分流电流和串联电压方案进行注入。