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1. 发明授权

US07663849B2 Permanent magnet generator protection scheme 失效
标题翻译：永磁发电机保护方案
公开(公告)号：US07663849B2
公开(公告)日：2010-02-16
申请号：US11505739
申请日：2006-08-17
申请人： Mahesh J. Shah , Chai-Nam Ng , George Seffernick
发明人： Mahesh J. Shah , Chai-Nam Ng , George Seffernick
IPC分类号： H02H7/00
CPC分类号： H02H7/06 , H02P9/102 , H02P9/107 , H02P29/60
摘要： A fault protection system provides fault protection to a permanent magnet (PM) generator. The fault protection system includes one or more overload and short-circuit protection circuits, an unbalanced protection circuit and a thermal protection circuit. The overload and short-circuit protection circuit detects both overload and short-circuit conditions by monitoring current and voltage generated at a single phase by the PM generator. The unbalanced protection circuit monitors and compares current and voltage generated associated with at least two individual phases to determine unbalanced conditions between the phases. The thermal protection circuit detects a thermal overload condition by monitoring the temperature of the PM generator. If the overload and short circuit protection circuit, the unbalanced protection circuit, or the thermal protection circuit detects a fault signal, a control circuit causes a control device to reduce or prevent mechanical power from being supplied to the PM generator, preventing the PM generator from generating power and protecting it from damage.
摘要翻译：故障保护系统为永磁（PM）发生器提供故障保护。故障保护系统包括一个或多个过载和短路保护电路，不平衡保护电路和热保护电路。过载和短路保护电路通过监测PM发电机在单相中产生的电流和电压来检测过载和短路情况。不平衡保护电路监测和比较与至少两个单独相位相关的电流和电压，以确定相之间的不平衡条件。热保护电路通过监测PM发生器的温度来检测热过载状态。如果过载和短路保护电路，不平衡保护电路或热保护电路检测到故障信号，控制电路会使控制装置减少或阻止机械电源供给PM发电机，防止PM发电机发电，防止损坏。

2. 发明申请

US20080043383A1 Permanent magnet generator protection scheme 失效
标题翻译：永磁发电机保护方案
公开(公告)号：US20080043383A1
公开(公告)日：2008-02-21
申请号：US11505739
申请日：2006-08-17
申请人： Mahesh J. Shah , Chai-Nam Ng , George Seffernick
发明人： Mahesh J. Shah , Chai-Nam Ng , George Seffernick
IPC分类号： H02H7/06
CPC分类号： H02H7/06 , H02P9/102 , H02P9/107 , H02P29/60
摘要： A fault protection system provides fault protection to a permanent magnet (PM) generator. The fault protection system includes one or more overload and short-circuit protection circuits, an unbalanced protection circuit and a thermal protection circuit. The overload and short-circuit protection circuit detects both overload and short-circuit conditions by monitoring current and voltage generated at a single phase by the PM generator. The unbalanced protection circuit monitors and compares current and voltage generated associated with at least two individual phases to determine unbalanced conditions between the phases. The thermal protection circuit detects a thermal overload condition by monitoring the temperature of the PM generator. If the overload and short circuit protection circuit, the unbalanced protection circuit, or the thermal protection circuit detects a fault signal, a control circuit causes a control device to reduce or prevent mechanical power from being supplied to the PM generator, preventing the PM generator from generating power and protecting it from damage.
摘要翻译：故障保护系统为永磁（PM）发生器提供故障保护。故障保护系统包括一个或多个过载和短路保护电路，不平衡保护电路和热保护电路。过载和短路保护电路通过监测PM发电机在单相中产生的电流和电压来检测过载和短路情况。不平衡保护电路监测和比较与至少两个单独相位相关的电流和电压，以确定相之间的不平衡条件。热保护电路通过监测PM发生器的温度来检测热过载状态。如果过载和短路保护电路，不平衡保护电路或热保护电路检测到故障信号，控制电路使控制装置减少或防止机械电源供给PM发电机，防止PM发电机发电，防止损坏。

3. 发明授权

US5040105A Stepped-waveform inverter with eight subinverters 失效
标题翻译：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。

4. 发明授权

US5559686A Stepped waveform inverter control 失效
标题翻译：步进波形逆变器控制
公开(公告)号：US5559686A
公开(公告)日：1996-09-24
申请号：US273039
申请日：1994-07-08
申请人： Sunil Patel , Chai-Nam Ng , P. John Dhyanchand , Vietson M. Nguyen , Michael Teagardin
发明人： Sunil Patel , Chai-Nam Ng , P. John Dhyanchand , Vietson M. Nguyen , Michael Teagardin
IPC分类号： H02M7/48 , H02M7/49 , H02M7/539 , H02M1/12
CPC分类号： H02M7/49 , H02M7/539
摘要： A stepped waveform inverter and control therefor utilizes the inverter itself as a divide-by-N counter in a phase-locked loop to assure precise control over the output phase and frequency of the inverter.
摘要翻译：阶梯式波形逆变器及其控制在锁相环中利用逆变器本身作为N分频计数器，以确保对逆变器输出相位和频率的精确控制。

5. 发明授权

US5031086A Hybrid power system 失效
标题翻译：混合动力系统
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。

6. 发明授权

US5027265A Regulator for stepped-waveform inverter 失效
标题翻译：用于阶梯式波形逆变器的调节器
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。

7. 发明授权

US4969081A Inverter switch current sensor with shoot-through current limiting 失效
标题翻译：变频器开关电流传感器，具有直通电流限制
公开(公告)号：US4969081A
公开(公告)日：1990-11-06
申请号：US294352
申请日：1989-01-09
申请人： Sampat S. Shekhawat , Chai-Nam Ng , P. John Dhyanchand
发明人： Sampat S. Shekhawat , Chai-Nam Ng , P. John Dhyanchand
IPC分类号： H02M1/00 , H02M1/38 , H02M1/40 , H02M7/538
CPC分类号： H02M1/40 , H02M1/38 , H02M7/538
摘要： The problem of sensing current through inverter switches is solved by a current transformer which has windings connected with the flyback diodes to demagnetize or reset the current transformer core. Size and weight of the transformer are minimized while avoiding a buildup of flux which would saturate the core.
摘要翻译：通过逆变器开关感测电流的问题由具有与回扫二极管连接的绕组的电流互感器解决以使电流互感器芯退磁或复位。变压器的尺寸和重量被最小化，同时避免了使芯体饱和的焊剂积聚。

8. 发明授权

US5301098A Feedforward inverter phase control 失效
标题翻译：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。

9. 发明授权

US5225973A Regulation circuit for a stepped-waveform inverter 失效
标题翻译：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。

10. 发明授权

US5065303A Transformer-coupled and phase-shifted inverter 失效
标题翻译：变压器耦合和相移逆变器
公开(公告)号：US5065303A
公开(公告)日：1991-11-12
申请号：US556452
申请日：1990-07-24
申请人： Vietson M. Nguyen , Chai-Nam Ng
发明人： Vietson M. Nguyen , Chai-Nam Ng
IPC分类号： H02M7/48 , H02M7/49
CPC分类号： H02M7/49
摘要： A power system in accordance with the present invention includes a first inverter and a second inverter, a first transformer having a primary coupled to an output of the first inverter and a secondary coupled only magnetically to the primary of the first transformer; a second transformer having a primary coupled to the output of the second inverter and a secondary coupled only magnetically to the primary of the second transformer; a controller and a number of series circuits equal to the number of phases, each series circuit comprising the secondary windings of a corresponding phase of each transformer with a first terminal of each series circuit being coupled to a reference potential and a second terminal being a phase output for the power system.
摘要翻译：根据本发明的电力系统包括第一逆变器和第二逆变器，第一变压器具有初级耦合到第一逆变器的输出，并且次级耦合到仅与第一变压器的初级磁耦合; 第二变压器，其具有耦合到所述第二反相器的输出的初级和仅耦合到所述第二变压器的初级的二次耦合; 一个控制器和多个等于相数的串联电路，每个串联电路包括每个变压器的相应相位的次级绕组，每个串联电路的第一端子耦合到参考电位，第二端子是相位输出电力系统。

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