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1. 发明授权

US4875148A Control for producing a low magnitude voltage at the output of a PWM inverter 失效
标题翻译：控制在PWM逆变器的输出端产生低电平的电压
公开(公告)号：US4875148A
公开(公告)日：1989-10-17
申请号：US285117
申请日：1988-12-16
申请人： Derrick I. Roe , Christopher J. Rozman , Bradley J. Recker
发明人： Derrick I. Roe , Christopher J. Rozman , Bradley J. Recker
IPC分类号： H02M7/5387 , H02M7/5395
CPC分类号： H02M7/5387 , H02M7/5395
摘要： At times, it may be necessary to operate switches of a PWM inverter to provide a low output voltage. However, in order to produce such a low voltage, it may be necessary to operate the switches near their minimum on time limit, which can in turn lead to damage or destruction of the switches. In order to overcome this problem, a control for an inverter which produces an output voltage having two levels wherein the inverter includes first and second switches coupled to an inverter output produces first and second switch control signals each having alternating switch on and switch off portions wherein each switch on portion is of a duration in excess of the minimum on time limit of the switches. The first and second switches are operated in accordance with the first and second switch control signals, respectively, to produce the output voltage wherein the switches are operated in a particular switch state for a duration less than the minimum on time limit of the switches to cause the output voltage to assume one of the levels during such time. Inasmuch as the switches are operated for periods of time in excess of the minimum on time limit, the risk of damage to or destruction of the switches is minimized.
摘要翻译：有时，可能需要操作PWM逆变器的开关以提供低输出电压。然而，为了产生这样的低电压，可能需要将开关操作在接近于最小限度的时间限制附近，这可能导致开关的损坏或破坏。为了克服这个问题，产生具有两个电平的输出电压的逆变器的控制，其中逆变器包括耦合到逆变器输出端的第一和第二开关产生每个具有交替开关和断开部分的第一和第二开关控制信号，每个开启部分的持续时间超过开关的最小限制时间。第一和第二开关分别根据第一和第二开关控制信号进行操作以产生输出电压，其中开关在特定的开关状态下操作持续时间小于开关的最小开启时间限制输出电压在此期间承担一个电平。由于开关的运行时间超过时间限制的最小值，所以开关的损坏或破坏的风险最小化。

2. 发明授权

US4956598A Low distortion control for a VSCF generating system 失效
标题翻译： VSCF发电系统的低失真控制
公开(公告)号：US4956598A
公开(公告)日：1990-09-11
申请号：US285423
申请日：1988-12-16
申请人： Bradley J. Recker , Thong-Meng Cheng , Derrick I. Roe , Christopher J. Rozman
发明人： Bradley J. Recker , Thong-Meng Cheng , Derrick I. Roe , Christopher J. Rozman
IPC分类号： H02P9/14 , H02M5/27
CPC分类号： H02M5/272 , Y10T307/289 , Y10T307/68
摘要： Prior variable speed constant frequency (VSCF) generating systems which utilize an inverter to derive constant frequency power from variable frequency power developed by a generator driven by a prime mover have controlled system output voltage by controlling the excitation of the generator. Such a control technique, however, does not provide voltage regulation of individual phases and minimize undesirable distortion in the system output. In order to overcome the foregoing problem, a control for a VSCF system having a generator and an inverter which receives DC power from a rectifier coupled to the generator controls switches in the inverter to maintain the voltage of the AC power developed by the inverter at a desired level and controls the power applied to an exciter of the generator to maintain the voltage of the DC power at a particular level relative to the voltage of the AC power developed thereby. Distortion in the inverter output is thereby minimized.
摘要翻译：利用逆变器从由原动机驱动的发电机产生的可变频率功率导出恒定频率功率的先前的变速恒频（VSCF）发电系统通过控制发电机的激励来控制系统的输出电压。然而，这样的控制技术不提供单相的电压调节并且使系统输出中的不期望的失真最小化。为了克服上述问题，具有发电机和逆变器的VSCF系统的控制从连接到发电机的整流器接收直流电力控制逆变器中的开关，以将由逆变器产生的交流电力的电压维持在并且控制施加到发电机的激励器的功率，以将DC功率的电压相对于由此产生的AC电力的电压维持在特定的水平。因此变频器输出端的失真最小化。

3. 发明授权

US4905134A Paralleling method and control for a VSCF system 失效
标题翻译： VSCF系统的并联方法和控制
公开(公告)号：US4905134A
公开(公告)日：1990-02-27
申请号：US291501
申请日：1988-12-29
申请人： Bradley J. Recker , Christopher J. Rozman , Derrick I. Roe
发明人： Bradley J. Recker , Christopher J. Rozman , Derrick I. Roe
IPC分类号： H02J3/38 , H02J3/46 , H02M5/27 , H02M5/44
CPC分类号： H02M5/272 , H02J3/46 , Y10T307/615 , Y10T307/625
摘要： Prior variable speed constant frequency (VSCF) system controls which operate the VSCF system while it is coupled in parallel with an external AC source across a load have controlled inverter output voltage based only upon the reactive current level supplied by the inverter. This has in turn resulted in the possibility of unstable system operation under load. In order to overcome the foregoing problem, a control for controlling the supply of power to a load from an inverter coupled in parallel with an AC power source across the load senses the real and reactive components of the current supplied by the inverter and the phase displacement of the power developed by the inverter relative to the power developed by the AC power source to derive an angular displacement signal. The frequency and phase of the inverter output are controlled in dependence upon the real current component supplied by the inverter and the angular displacement signal while the magnitude of the inverter output is controlled in dependence upon the real and reactive current components. The present control is capable of operating a VSCF inverter in a stable fashion under load.
摘要翻译：在VSCF系统与负载外部的交流电源并联的情况下，运行VSCF系统的先前的变速恒定频率（VSCF）系统控制只能根据逆变器提供的无功电流来控制逆变器的输出电压。这反过来也导致系统运行不稳定的可能性。为了克服上述问题，用于控制来自与跨过负载的交流电源并联连接的逆变器的负载供电的控制感测由逆变器提供的电流的实际和无功分量以及相位移由逆变器开发的功率相对于由AC电源产生的功率来导出角位移信号。逆变器输出的频率和相位根据由逆变器提供的实际电流分量和角位移信号进行控制，同时根据实际和无功电流分量控制逆变器输出的幅度。本控制能够以稳定的方式在负载下操作VSCF逆变器。

4. 发明授权

US4875149A Phase separation control 失效
标题翻译：相分离控制
公开(公告)号：US4875149A
公开(公告)日：1989-10-17
申请号：US285118
申请日：1988-12-16
申请人： Christopher J. Rozman , Derrick I. Roe , Bradley J. Recker
发明人： Christopher J. Rozman , Derrick I. Roe , Bradley J. Recker
IPC分类号： H02J3/26 , H02J3/38 , H02M5/458
CPC分类号： H02M5/458
摘要： Polyphase inverters for converting AC power into polyphase AC output power typically experience phase shifts due to unbalanced phase loading. The resulting phase error is undesirable and should be eliminated, if possible. In order to overcome the foregoing problem, a control for maintaining N-1 phase outputs at desired angular displacements relative to a reference phase output determines the angular deviation of each of the N-1 phase outputs from the desired angular displacement for such phase output and adjusts a control waveform in time for each of a number of switches based upon the angular deviation of the phase output produced by such switch so that the angular deviations are minimized.
摘要翻译：用于将交流电转换为多相交流输出功率的多相逆变器通常由于相位负载不平衡而经历相移。如果可能，所得的相位误差是不期望的并且应当被消除。为了克服上述问题，相对于参考相位输出在期望的角位移保持N-1相输出的控制确定了N-1相输出中的每一个与用于这种相位输出的期望角位移的角偏差，基于由这种开关产生的相位输出的角偏差来调整多个开关中的每一个的控制波形，使得角度偏差最小化。

5. 发明授权

US4937462A No break power transfer control for a VSCF power generating system 失效
标题翻译： VSCF发电系统不断断电力传输控制
公开(公告)号：US4937462A
公开(公告)日：1990-06-26
申请号：US300820
申请日：1989-01-23
申请人： Bradley J. Recker , Christopher J. Rozman , Derrick I. Roe
发明人： Bradley J. Recker , Christopher J. Rozman , Derrick I. Roe
IPC分类号： H02J3/42
CPC分类号： H02J3/42 , Y02T50/54 , Y02T50/545 , Y10T307/313 , Y10T307/516 , Y10T307/735
摘要： In aircraft applications, it may be necessary or desirable to transfer one or more loads between a variable speed, constant frequency (VSCF) power generating system and a further source of AC power. Prior controls for effecting such transfer, however, have been unduly complex. In order to overcome this problem, a control for a VSCF system senses the deviation of a parameter of the power developed by an inverter of the system relative to a parameter of the power developed by an AC power source and controls the inverter in accordance with such deviation to cause the parameter of the power developed thereby to approach the parameter of the power developed by the AC power source. The inverter and the AC power source are connected in parallel across one or more loads when the parameter deviation is within a certain range. Either the inverter or the AC power source is thereafter disconnected a certain time after the two were connected in parallel to complete the power transfer.
摘要翻译：在飞机应用中，可能需要或希望在变速，恒定频率（VSCF）发电系统和另外的交流电源之间传送一个或多个负载。然而，进行此类转移的先前控制措施过于复杂。为了解决这个问题，VSCF系统的控制意识到由系统的逆变器开发的功率参数相对于由AC电源产生的功率的参数的偏差，并根据这种控制来控制逆变器导致由此产生的功率的参数接近由AC电源产生的功率的参数的偏差。当参数偏差在一定范围内时，逆变器和交流电源并联连接一个或多个负载。此后，在两个并联连接之后，变频器或交流电源断开一定时间以完成电力传输。

6. 发明授权

US5012437A Digitally controlled oscillator 失效
标题翻译：数字控制振荡器
公开(公告)号：US5012437A
公开(公告)日：1991-04-30
申请号：US442899
申请日：1989-11-29
申请人： Bradley J. Recker , Derrick I. Roe , Christopher J. Rozman
发明人： Bradley J. Recker , Derrick I. Roe , Christopher J. Rozman
IPC分类号： H03K5/00 , H03L7/099
CPC分类号： H03L7/0994 , H03K5/00006
摘要： A digitally controlled oscillator (DCO) includes a binary full adder having a first set of inputs coupled to input lines, a second set of inputs, a set of summation outputs and a carry output. A latch is provided having a set of latch inputs each coupled to one of the outputs of the binary full adder, a clock input and a set of latched outputs each coupled to one of the second set of inputs of the binary full adder wherein the binary full adder sums the bits of a latched period command signal which is provided on the input lines with bits appearing at the latched outputs and provides a summed value to the summation and carry outputs. A finite state machine is coupled to the carry output of the binary full adder and to the clock input of the latch wherein the machine produces the oscillator signal having a period determined by the period command signal.
摘要翻译：数字控制振荡器（DCO）包括二进制全加器，其具有耦合到输入线的第一组输入，第二组输入，一组求和输出和进位输出。提供了一个锁存器，其具有一组锁存器输入，每个锁存器输入端耦合到二进制全加器的输出之一，时钟输入端和一组锁存输出端，每一个耦合到二进制全加器的第二组输入端，其中二进制全加器将输出线上提供的锁存周期指令信号的位与出现在锁存输出端的位相加，并将求和值提供给求和并传送输出。有限状态机耦合到二进制全加器的进位输出和锁存器的时钟输入，其中机器产生具有由周期指令信号确定的周期的振荡器信号。

7. 发明授权

US5036451A Inverter control with individual phase regulation 失效
标题翻译：变频器控制具有单相调节功能
公开(公告)号：US5036451A
公开(公告)日：1991-07-30
申请号：US458499
申请日：1989-12-28
申请人： Christopher J. Rozman , Bradley J. Recker , Derrick I. Roe
发明人： Christopher J. Rozman , Bradley J. Recker , Derrick I. Roe
IPC分类号： H02M7/5387
CPC分类号： H02M7/53873
摘要： An inverter control for an N phase inverter includes a single memory which stores a plurality of bytes, circuitry coupled to the memory for developing a series of memory addresses for each phase output of the inverter, each series of memory addresses defining a phase output waveform to be produced and circuitry coupled to the developing circuitry for accessing the memory with a memory address from each series thereof during each of a number of accessing cycles so that N bytes are provided at an output of the memory during each accessing cycle. A demultiplexer is coupled to the memory for deriving gating signals for switches in the inverter from the bytes provided at the output of the memory.
摘要翻译：用于N相逆变器的逆变器控制器包括存储多个字节的单个存储器，耦合到存储器的电路，用于开发用于逆变器的每个相位输出的一系列存储器地址，每一系列存储器地址限定相位输出波形以及电路耦合到显影电路，用于在每个访问周期中的每一个期间从其每个系列的存储器地址访问存储器，使得在每个访问周期期间在存储器的输出处提供N个字节。解复用器耦合到存储器，用于从设置在存储器的输出处的字节导出逆变器中的开关的选通信号。

8. 发明授权

US4882120A DC content control for an inverter 失效
标题翻译：逆变器的直流内容控制
公开(公告)号：US4882120A
公开(公告)日：1989-11-21
申请号：US285119
申请日：1988-12-16
申请人： Derrick I. Roe , Christopher J. Rozman , Bradley J. Recker
发明人： Derrick I. Roe , Christopher J. Rozman , Bradley J. Recker
IPC分类号： H02M7/537 , H02M7/5387
CPC分类号： H02M7/53875 , H02M2007/4803
摘要： Power inverters for converting DC power into AC power often produce a DC component in the inverter output which is objectionable. In order to overcome this problem, an inverter control according to the present invention detects the magnitude of the DC component in the inverter AC output power and adjusts the time of selected rising and falling edges of control waveforms for switches in the inverter to reduce the magnitude of the DC component.
摘要翻译：用于将直流电转换为交流电的电力逆变器通常会在逆变器输出中产生不利的直流分量。为了克服这个问题，根据本发明的逆变器控制检测逆变器AC输出功率中的DC分量的大小，并且调整逆变器中的开关的控制波形的选定上升沿和下降沿的时间以减小幅度的直流分量。

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