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21. 发明授权

US5953220A System and method for zero phase error tracking of reference in PWM inverters 失效
标题翻译： PWM逆变器参考零相位误差跟踪系统及方法
公开(公告)号：US5953220A
公开(公告)日：1999-09-14
申请号：US217425
申请日：1998-12-21
申请人： Shan-Chin Tsai , Vietson M. Nguyen
发明人： Shan-Chin Tsai , Vietson M. Nguyen
IPC分类号： H02M7/48 , H02M7/537 , H02M1/12 , H03L7/00
CPC分类号： H02M7/48 , H02M7/537 , H02M2001/0022
摘要： In an inverting system, a reference V.sub.REF is coupled to an input of a predictor. The predictor has an output V.sub.P and a transfer function T.sub.P. An inverter of the inverting system has a pulse width modulator, a filter, and a transfer function T.sub.I. The transfer function T.sub.P is substantially equal to 1/T.sub.I. The inverter has an output V.sub.C, and the inverter is coupled to the output V.sub.P so that V.sub.C =V.sub.REF T.sub.P T.sub.I =V.sub.REF. In this manner, the output of the inverter tracks the reference without phase error.
摘要翻译：在反相系统中，参考VREF耦合到预测器的输入端。预测器具有输出VP和传递函数TP。反相系统的反相器具有脉冲宽度调制器，滤波器和传递函数TI。传递函数TP基本上等于1 / TI。逆变器具有输出VC，并且反相器耦合到输出VP，使得VC = VREFTPTI = VREF。以这种方式，逆变器的输出跟踪参考而没有相位误差。

22. 发明授权

US5047914A Current controlled inverter 失效
标题翻译：电流控制变频器
公开(公告)号：US5047914A
公开(公告)日：1991-09-10
申请号：US439685
申请日：1989-11-21
申请人： John J. Dhyanchand , Vietson M. Nguyen
发明人： John J. Dhyanchand , Vietson M. Nguyen
IPC分类号： H02M7/538
CPC分类号： H02M7/53803
摘要： An inverter (100) in accordance with the present invention for producing an AC output potential from a filter (40) containing an inductance (42) through which current flows to a load (12) in accordance with the invention includes first and second switches (Q1 and Q2) in series between a pair of DC reference potentials with each switch having a conductive and a non-conductive state controlled by control signals applied to control terminals of the switch; first and second freewheeling diodes (46) coupled in parallel respectively between first and second terminals of the first and second switches; a current sensor (38) producing a load current signal proportional to current flowing through the inductance to the load; and a controller (102), responsive to an error signal proportional to a difference between an output voltage produced by the inverter applied to the load and a signal proportional to a desired regulated output voltage of the inverter, a current reference signal varying at a frequency equal to the AC output potential and the load current signal, for producing the control signals applied to the switches which turn on the switches only when current is flowing in the freewheeling diode parallel with the switch being turned on.
摘要翻译：根据本发明的用于从根据本发明的包含电流流过负载（12）的电感（42）的滤波器（40）产生AC输出电压的逆变器（100）包括第一和第二开关 Q1和Q2）串联在一对直流参考电位之间，其中每个开关具有由施加到开关的控制端子的控制信号控制的导电和非导通状态; 分别并联在第一和第二开关的第一和第二端子之间的第一和第二续流二极管（46）电流传感器（38），其产生与流过所述电感的电流成比例的负载电流信号到所述负载; 以及控制器（102），响应于与施加到负载的逆变器产生的输出电压和与所述逆变器的期望调节输出电压成比例的信号之间的差成比例的误差信号，以频率变化的电流参考信号等于交流输出电位和负载电流信号，用于产生施加到开关的控制信号，开关仅在电流与开关导通并联的续流二极管中流动时导通开关。

23. 发明授权

US5036449A Power supply and method for producing high voltage high power outputs in response to variable voltage DC inputs 失效
标题翻译：用于响应可变电压DC输入产生高压大功率输出的电源和方法
公开(公告)号：US5036449A
公开(公告)日：1991-07-30
申请号：US447573
申请日：1989-12-07
申请人： John J. Dhyanchand , Vietson M. Nguyen
发明人： John J. Dhyanchand , Vietson M. Nguyen
IPC分类号： H02J1/10 , H02M3/28
CPC分类号： H02J1/102 , H02M3/285
摘要： A power supply for converting a variable DC input potential (12) to a regulated DC output potential in accordance with the invention includes a plurality of DC to DC converters (300), each converter operating in response to a DC input potential having an operating range, having an input for receiving a DC input potential which is variable in magnitude, and an output for producing the DC output potential, the outputs of the converters being coupled together; a variable voltage divider (18) having an input coupled to the variable input potential, a plurality of connected stages (100) coupled to the input potential, at least one control signal applied to the variable voltage divider for controlling a number of stages across which the variable input potential is dropped; a switching circuit (200), coupled between the variable voltage divider and the plurality of DC to DC converters, responsive to at least one switching control signal, for coupling an output potential developed by at least one of the stages to at least one of the converters as a DC input potential so that each converter to which an output potential from one of the stages is coupled has an input potential within an operating range of the converter; and a controller (500), responsive to the variable input potential, for generating the at least one control signal and the at least one switching signal as a function of the DC input potential.
摘要翻译：根据本发明的用于将可变DC输入电位（12）转换为稳定的DC输出电位的电源包括多个DC-DC转换器（300），每个转换器响应于具有工作范围的DC输入电位而工作具有用于接收大小可变的DC输入电位的输入端和用于产生DC输出电位的输出端，所述转换器的输出端耦合在一起; 具有耦合到所述可变输入电位的输入的可变分压器（18），耦合到所述输入电位的多个连接级（100），施加到所述可变分压器的至少一个控制信号，用于控制所述可变分压器可变输入电位下降; 耦合在可变分压器和多个DC-DC转换器之间的开关电路（200），响应于至少一个开关控制信号，将由至少一个级开发的输出电位耦合到至少一个转换器作为DC输入电位，使得来自一个级的输出电位的每个转换器具有在转换器的工作范围内的输入电位; 以及响应于所述可变输入电位的控制器（500），用于根据所述DC输入电位产生所述至少一个控制信号和所述至少一个开关信号。

24. 发明授权

US4651267A Proportional base drive circuit for transistorized bridge inverter 失效
标题翻译：晶体管桥式逆变器的比例基极驱动电路
公开(公告)号：US4651267A
公开(公告)日：1987-03-17
申请号：US745403
申请日：1985-06-14
申请人： Vietson M. Nguyen , P. John Dhyanchand , Pierre S. Thollot
发明人： Vietson M. Nguyen , P. John Dhyanchand , Pierre S. Thollot
IPC分类号： H02H7/122 , H02M7/5383 , H02M7/53846 , H02M7/53862 , H02M7/5387
CPC分类号： H02M7/53862 , H02H7/1227 , H02M7/49 , H02M7/53846 , H03K17/0424
摘要： A proportional base drive circuit which overcomes the problems of the prior art relative to relatively long turn-off time of power switches in an inverter and the absence of protection circuitry therefor includes a current transformer having a primary winding coupled to a main current electrode of a pair of power switches and first and second secondary windings each of which develops regenerative currents proportional to load current. First and second auxiliary switches are coupled between the secondary windings and the control electrodes of the power switches. Means are included for operating the auxiliary switches in synchronism with the power switches so that the power switches operate in rapid fashion. Means are also included for disabling the power switches when an overcurrent condition is sensed.
摘要翻译：克服现有技术相对于逆变器中的功率开关的相对长的关断时间的问题的比例基极驱动电路以及不存在其保护电路的电流互感器包括电流互感器，其具有耦合到主电流电极一对电源开关和第一和第二次级绕组，每个绕组产生与负载电流成比例的再生电流。第一和第二辅助开关耦合在次级绕组和功率开关的控制电极之间。包括用于与电源开关同步操作辅助开关的装置，使得电源开关以快速方式操作。当检测到过电流条件时，还包括用于禁用电源开关的装置。

25. 发明授权

US4599552A Generator voltage regulator 失效
标题翻译：发电机电压调节器
公开(公告)号：US4599552A
公开(公告)日：1986-07-08
申请号：US648721
申请日：1984-09-07
申请人： Graham R. Phillips , Vietson M. Nguyen
发明人： Graham R. Phillips , Vietson M. Nguyen
IPC分类号： H02J7/24 , H02J7/14
CPC分类号： H02J7/247 , Y02T10/92
摘要： A voltage regulator circuit for a three phase AC generator includes an integrator circuit which integrates the voltage across each negative half cycle of generator output and compares it to a reference voltage to adjust the phase angle of an SCR circuit which provides the power to the exciter field of the generator. A bypass circuit is provided for bypassing the regulating circuit at low generator speeds, the bypass circuit including a FET which directly connects the anode and gate of the SCR in the exciter field power supply to directly apply the generator output voltage to the exciter field at low generator speeds and output voltage. A pair of transistors are latched as the output voltage reaches a preselected minimum value to de-energize the FET and enable the regulator circuit to take over control.
摘要翻译：用于三相交流发电机的电压调节器电路包括积分器电路，其将发电机输出的每个负半周期上的电压进行积分，并将其与参考电压进行比较，以调整向电动机励磁场提供功率的SCR电路的相位角的发电机。提供旁路电路用于以低发电机速度绕过调节电路，旁路电路包括直接连接励磁场电源中的SCR的阳极和栅极的FET，以将发电机输出电压直接施加到低频的励磁场发电机转速和输出电压。当输出电压达到预选的最小值时，一对晶体管被锁存，以使FET断电，并使调节器电路能够接管。

26. 发明申请

US20130279216A1 COMPENSATING RIPPLE ON PULSE WITH MODULATOR OUTPUTS 有权
标题翻译：用调制器输出脉冲补偿纹波
公开(公告)号：US20130279216A1
公开(公告)日：2013-10-24
申请号：US13453527
申请日：2012-04-23
申请人： Vietson M. Nguyen , Adam Michael White , Harry Huazhen Chai
发明人： Vietson M. Nguyen , Adam Michael White , Harry Huazhen Chai
IPC分类号： H02M1/14
CPC分类号： H02M1/14 , H02M5/458 , H02M7/487 , H02M2001/0022 , H02M2001/0025
摘要： A ripple compensation apparatus comprises a ripple detection unit to detect a ripple on a dual DC bus, a waveform generation unit to generate a modulated waveform based on a base waveform and the detected ripple, and a multi-phase control signal generation unit to receive the modulated waveform and to generate at least one pulse width modulated control signal based on the modulated waveform.
摘要翻译：纹波补偿装置包括纹波检测单元，用于检测双DC总线上的纹波;波形生成单元，用于基于基本波形和检测到的纹波生成调制波形;以及多相位控制信号生成单元，并且基于调制波形产生至少一个脉宽调制控制信号。

27. 发明授权

US08553381B2 Gradually reducing resistive clamp 有权
标题翻译：逐渐减小电阻钳
公开(公告)号：US08553381B2
公开(公告)日：2013-10-08
申请号：US13117181
申请日：2011-05-27
申请人： Vietson M. Nguyen , John D. Sagona , Waleed M. Said
发明人： Vietson M. Nguyen , John D. Sagona , Waleed M. Said
IPC分类号： H02H9/00 , H02H3/20 , H02H9/04 , H02H3/22
CPC分类号： H02H9/041 , H02H9/042
摘要： A voltage spike protection system minimizes a voltage spike by connecting a resistive clamp to a power source when the voltage spike is detected. The voltage spike detection system disconnects the resistive clamp after a portion of the voltage spike is dissipated.
摘要翻译：电压尖峰保护系统通过在检测到电压尖峰时将电阻钳连接到电源来最大限度地减小电压尖峰。电压尖峰检测系统在电压尖峰的一部分消散之后断开电阻钳位。

28. 发明申请

US20120236439A1 ELECTRICAL ACCUMULATOR UNITS WITH SAFE TURN-OFF 审中-公开
标题翻译：带安全关闭的电动蓄电池单元
公开(公告)号：US20120236439A1
公开(公告)日：2012-09-20
申请号：US13048286
申请日：2011-03-15
申请人： Vietson M. Nguyen
发明人： Vietson M. Nguyen
IPC分类号： H02H9/02 , G05F3/08
CPC分类号： H02J7/0031 , H02J7/34 , H02M1/14 , H02M1/32 , H02M3/158 , H02M3/1584 , H02M2001/322
摘要： An electrical accumulator unit includes a power storage device, a first switch, a power converter, a controller, and a dissipation circuit for dissipating energy remnant in the power converter when the electrical accumulator unit is turned Off. The first switch connects the power storage device to the power converter, which includes at least a second switch that is selectively turned On and Off to regulate the transfer of power between the power storage device and an output of the electrical accumulator unit. The controller turns Off the electrical accumulator device by turning Off the first switch, thereby disconnecting the power storage device from the power converter, and turning On the second switch to connect the dissipation circuit to the power converter in a recirculation circuit path that dissipates energy stored in the power converter.
摘要翻译：蓄电单元包括蓄电装置，第一开关，功率转换器，控制器和用于在蓄电单元关闭时耗散功率转换器中的能量余量的耗散电路。第一开关将蓄电装置连接到功率转换器，功率转换器至少包括一个第二开关，该第二开关被选择性地导通和关闭以调节蓄电装置与蓄电装置的输出之间的电力传递。控制器通过关闭第一个开关关闭蓄电装置，从而将蓄电装置与电力转换器断开，并打开第二个开关，将耗散电路连接到功率转换器，该再循环电路路径消耗能量储存在电源转换器中。

29. 发明申请

US20090284997A1 METHOD TO CREATE PWM SWITCHING WITH NEAR ZERO COMMON MODE NOISE 失效
标题翻译：用零次通用模式噪声创建PWM开关的方法
公开(公告)号：US20090284997A1
公开(公告)日：2009-11-19
申请号：US12119531
申请日：2008-05-13
申请人： Vietson M. Nguyen
发明人： Vietson M. Nguyen
IPC分类号： H02M1/12 , H02M1/14
CPC分类号： H02M7/487 , H02M1/0845
摘要： A method for controlling a three-level inverter with a two-level inverter controller uses a conversion circuit to process the two-level control signals and output a set of three-level control signals.
摘要翻译：用两级逆变器控制器控制三电平逆变器的方法使用转换电路来处理两电平控制信号并输出一组三电平控制信号。

30. 发明申请

US20090016089A1 Electromechanical power transfer system with even phase number dynamoelectric machine and three level inverter 审中-公开
标题翻译：具有均相电机和三电平逆变器的机电输电系统
公开(公告)号：US20090016089A1
公开(公告)日：2009-01-15
申请号：US11825818
申请日：2007-07-09
申请人： Vietson M. Nguyen
发明人： Vietson M. Nguyen
IPC分类号： H02M7/06 , H02M7/537
CPC分类号： H02M7/487
摘要： An electromechanical power transfer system that converts direct current (DC) electrical power to variable mechanical power, comprises: a source of DC that has a neutral ground, a positive potential output with a level of electrical potential that is positive relative to the neutral ground and a negative potential output with a level of electrical potential that is negative relative to the neutral ground; a multiphase alternating current (AC) dynamoelectric machine with an even number of phases; and a neutral point clamped (NPC) inverter system that receives electrical power from the positive and negative potential outputs the DC source to generate multiphase AC power for the dynamoelectric machine with the same number of even phases that exhibits no common mode potential/noise.
摘要翻译：将直流（DC）电功率转换成可变机械功率的机电式功率传输系统包括：具有中性点的DC源，具有相对于中性点的正电位的电势水平的正电位输出，以及具有相对于中性点为负的电位水平的负电位输出; 具有偶数阶段的多相交流（AC）电动机; 并且从正和负电位接收电力的中性点钳位（NPC）逆变器系统输出DC源，以产生具有相同数量的不具有共模电位/噪声的相位数量的电动机的多相AC电力。

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