公开(公告)号：US5600548A

公开(公告)日：1997-02-04

申请号：US289485

申请日：1994-08-11

申请人： Vietson Nguyen ,  P. John Dhyanchand

发明人： Vietson Nguyen ,  P. John Dhyanchand

IPC分类号： H02M7/48 ,  H02M7/5387 ,  H02M1/12

CPC分类号： H02M7/48 ,  H02M7/53873 ,  H02M2007/4803

摘要： A control for an inverter having a switch which is operated in accordance with a PWM waveform having spaced rising and falling edges includes circuitry which detects the magnitude and polarity of a DC component in the AC output power produced by the inverter and an adder/subtractor which adjusts at least one of a rising and falling edge of the waveform to reduce the magnitude of the DC component.

摘要翻译： 具有根据具有间隔的上升沿和下降沿的PWM波形操作的开关的逆变器的控制包括检测由逆变器产生的AC输出功率中的DC分量的大小和极性的电路，以及加法器/减法器， 调整波形的上升沿和下降沿中的至少一个以减小DC分量的幅度。

公开(公告)号：US5041958A

公开(公告)日：1991-08-20

申请号：US454433

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 power conversion system of the type used in an aircraft, for example, includes a first subinverter pair that generates a first pair of waveforms and a second subinverter pair that generates a second pair of waveforms. The two subinverter pairs are connected to a summing transformer having two pairs of primary windings and a plurality 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 two 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亚逆变器对和产生第二对波形的第二子逆变器对。 两个副变换器对连接到具有两对初级绕组和耦合到初级绕组的多个次级绕组的求和变压器。 调节器耦合到求和变压器的输出，并根据在求和变压器的输出端的电压和电流来改变由两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。

公开(公告)号：US5031086A

公开(公告)日：1991-07-09

申请号：US454009

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： A hybrid power system which converts variable-frequency power developed by a brushless generator into DC power which is supplied to a DC load and constant-frequency AC power which is supplied to an AC load includes an AC/DC converter coupled to a main generator portion armature winding of the generator which converts the variable-frequency power produced by the generator into the DC power and a DC/AC converter coupled to the AC/DC converter which converts the DC power into the constant-frequency AC power. A first regulator is coupled to an exciter portion field winding of the generator for supplying current thereto in dependence upon a parameter of the DC power to maintain such parameter substantially at a regulated DC value. A second regulator is coupled to the DC/AC converter for controlling same in accordance with a parameter of the constant-frequency AC power to maintain such parameter substantially at a regulated AC value.

摘要翻译： 将由无刷发电机产生的可变频率功率转换为直流负载的DC电力和提供给AC负载的恒定频率AC电力的混合动力系统包括：AC / DC转换器，其耦合到主发电机部分 发电机的电枢绕组将由发电机产生的可变频率功率转换为直流电力，以及耦合到AC / DC转换器的DC / AC转换器，其将DC功率转换为恒定频率AC电力。 第一调节器耦合到发电机的激励器部分励磁绕组，用于根据DC功率的参数提供电流，以将该参数保持在稳定的DC值。 第二调节器耦合到DC / AC转换器，用于根据恒定频率AC功率的参数进行控制，以将该参数保持在稳定的AC值。

公开(公告)号：US5027265A

公开(公告)日：1991-06-25

申请号：US453975

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： A regulator for a stepped-waveform inverter having first and second subinverters which produce waveforms having a variable phase displacement therebetween and a summing transformer which sums the outputs of the subinverters includes circuitry for detecting a deviation of a parameter of the AC output power produced by the inverter from a reference and circuitry coupled to the detecting circuitry for deriving a phase command signal from the detected deviation. A comparator compares the phase command signal with a ramp signal to obtain a comparison signal and circuitry operates the first and second subinverters responsive to the comparison signal to cause the phase displacement to vary in accordance with the phase command signal.

摘要翻译： 一种用于阶梯波形逆变器的调节器，具有产生具有可变相位位移的波形的第一和第二子逆变器，以及将所述次级逆变器的输出相加的求和变换器包括用于检测由所述逆变器产生的交流输出功率的参数的偏差的电路 来自参考的反相器和耦合到检测电路的电路，用于从检测到的偏差导出相位命令信号。 比较器将相位命令信号与斜坡信号进行比较以获得比较信号，并且电路根据比较信号操作第一和第二子反相器，以使相位位移根据相位指令信号而变化。

公开(公告)号：US4973902A

公开(公告)日：1990-11-27

申请号：US448251

申请日：1989-12-11

申请人： John Dhyanchand ,  Vietson Nguyen

发明人： John Dhyanchand ,  Vietson Nguyen

IPC分类号： H02H7/06

CPC分类号： H02H7/06

摘要： A variable speed, constant frequency aircraft power system uses current sensing diodes to rectify the power generator output. The current flow through pairs of diodes is compared to generate phase currents to detect feeder faults.

摘要翻译： 变速恒频飞机电力系统使用电流感应二极管来整流发电机输出。 将通过成对的二极管的电流进行比较以产生相电流以检测馈线故障。