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。

公开(公告)号：US4947100A

公开(公告)日：1990-08-07

申请号：US421830

申请日：1989-10-16

申请人： P. John Dhyanchand ,  Vietson Nguyen

发明人： P. John Dhyanchand ,  Vietson Nguyen

IPC分类号： F02N11/04

CPC分类号： F02N11/04

摘要： A power conversion system is operable in a generating mode to convert motive power developed by a prime mover into electrical power and in a starting mode to convert electrical power developed by a source of AC power into motive power for starting the prime mover. The system includes a rectifier having an output coupled to a DC link, first and second inverters, each coupled to the DC link and transformer including first and second sets of primary windings and a set of secondary windings wherein the second set of primary winding is coupled to an output of the second inverter. Contactors are provided for coupling the rectifier to the generator armature windings and the first set of primary windings to an output of the first inverter so that AC power produced by the generator is converted into DC power on the DC link and the DC power is converted into fixed frequency AC power which is developed in the set of secondary windings. The contactors are operable in the starting mode to couple the source of AC power to the set of secondary windings, the first set of primary windings to the rectifier and the output of the first inverter to the generator armature windings so that the AC power induced in the first set of primary windings due to application of AC power to the set of secondary windings is converted into DC power on the DC link and the DC power is converted into AC power at a controlled voltage and frequency which is applied to the generator armature windings.

摘要翻译： 电力转换系统可在发电模式下操作，以将由原动机开发的动力转换为电力，并以起动模式将由AC电源产生的电力转换成用于启动原动机的动力。 该系统包括具有耦合到DC链路的输出的整流器，第一和第二反相器，每个耦合到DC链路和变压器，其包括第一组和第二组初级绕组和一组次级绕组，其中第二组初级绕组耦合 到第二反相器的输出。 提供接触器用于将整流器与发电机电枢绕组和第一组初级绕组耦合到第一逆变器的输出端，使得由发电机产生的交流电力被转换成DC链路上的直流电力，直流电力被转换成 在二次绕组组中开发的固定频率交流电源。 接触器可在启动模式下操作，将AC电源耦合到次级绕组组，第一组初级绕组到整流器，并将第一逆变器的输出耦合到发电机电枢绕组，使得AC 由于将AC电力施加到次级绕组组的第一组初级绕组在DC链路上被转换为DC电力，并且DC电力以受控的电压和频率转换成施加到发电机电枢绕组的受控电压 。

公开(公告)号：US5281905A

公开(公告)日：1994-01-25

申请号：US450643

申请日：1989-12-14

申请人： P. John Dhyanchand ,  Vietson Nguyen

发明人： P. John Dhyanchand ,  Vietson Nguyen

IPC分类号： F02N11/04 ,  H02P3/00

CPC分类号： F02N11/04

摘要： This invention relates to a hybrid AC/DC power source for aircraft power generation and aircraft engine starting. The power source employs an induction motor/generator and a converter for converting high frequency AC power into separate DC and low frequency AC power for use by aircraft electrical systems. The subject invention contemplates the provision of a driver for the motor/generator comprising a circuit for providing excitation to the motor/generator when it is operating as a generator, the circuit also converting AC power produced by the generator into the high frequency AC power for use by the converter. The converter comprises a first rectifier which produces the DC power and a second rectifier and an inverter which together produce the low frequency AC power. The generator produces uncontrolled frequency AC power. Bidirectional switches operate within the circuit to invert DC excitation power to produce power for the AC excitation and to rectify output of the generator into DC. The generator can function as an induction motor to provide motive power to start the aircraft engine. Either external DC power can provide power to the induction motor via the circuit or external AC power can provide power to the induction motor via the circuit.

摘要翻译： 本发明涉及用于飞机发电和飞机发动机起动的混合AC / DC电源。 电源采用感应电动机/发电机和转换器，用于将高频交流电转换为单独的直流和低频交流电，供飞机电气系统使用。 本发明设想提供用于电动机/发电机的驱动器，其包括用于在电动机/发电机作为发电机工作时向电动机/发电机提供励磁的电路，该电路还将由发电机产生的AC电力转换为高频AC电力 由转换器使用。 该转换器包括产生直流电力的第一整流器和一起产生低频AC电力的第二整流器和逆变器。 发电机产生不受控制的频率交流电源。 双向开关在电路内工作，以反转直流励磁功率，为交流励磁供电，并将发电机的输出整流为直流。 发电机可以用作感应电动机，以提供起动飞机发动机的动力。 外部直流电源可以通过电路为感应电动机提供电力，或外部交流电源可以通过电路向感应电动机提供电力。

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。

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。

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。

公开(公告)号：US5657214A

公开(公告)日：1997-08-12

申请号：US709118

申请日：1991-06-03

申请人： Vietson Nguyen ,  P. John Dhyanchand

发明人： Vietson Nguyen ,  P. John Dhyanchand

IPC分类号： H02M7/48 ,  H02M7/49 ,  H02M1/12

CPC分类号： H02M7/49

摘要： An inverter for converting DC power into AC power includes first and second subinverters having a plurality of controllable switches and three-phase outputs coupled to a summing transformer having wye and delta connected sets of primary windings and a set of secondary windings. The switches in the subinverters are controlled so that the subinverters produce first and second sets of pulse-width modulated subinverter waveforms which are summed by the summing transformer to produce the AC power in the secondary winding.

摘要翻译： 用于将DC电力转换成AC电力的逆变器包括具有多个可控开关和三相输出的第一和第二子变换器，三相输出耦合到具有初级绕组和一组次级绕组组的三角形和三角形组合的求和变压器。 子变换器中的开关被控制，使得次级变换器产生第一和第二组脉冲宽度调制的次级反相器波形，其通过求和变压器相加以在次级绕组中产生AC电力。

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。