公开(公告)号：US4879624A

公开(公告)日：1989-11-07

申请号：US137582

申请日：1987-12-24

申请人： Gregory D. Jones ,  William R. Owens ,  Clifford G. Thiel ,  Clive M. Danby

发明人： Gregory D. Jones ,  William R. Owens ,  Clifford G. Thiel ,  Clive M. Danby

IPC分类号： H02H3/02 ,  H02J9/06 ,  H03K17/082 ,  H03K17/13

CPC分类号： H02J9/06 ,  H02H3/021 ,  H03K17/0822 ,  H03K17/133 ,  Y10T307/615 ,  Y10T307/735

摘要： A system is disclosed for sequentially disconnecting multiple phases of a first power source (12) from an electrical load (14) requiring a minimum of interruption and connecting a second power source (28) to the electrical load. A first embodiment of the invention disconnects immediately the phase in which a trip condition requiring disconnection of the first source power is detected and disconnects phases of a first power source (12) in which a trip condition is not detected upon the detection of zero current flow in those phases. In a second embodiment of the invention, each of the phases of the first power source (12) is disconnected immediately from the electrical load (14) upon the detection of a trip condition in any one of the phases requiring disconnection of the first power source. In both embodiments of the invention, the phases of the second backup power source (28) are connected upon the detection of the occurrence of zero voltage points in the respective phases. One of the features present in this system is an inhibiting signal which is created when the second backup power source, not on line, goes bad which prohibits a disconnection of the first power supply from the electrical load.

摘要翻译： 公开了一种用于将第一电源（12）的多个相位与要求最小中断并将第二电源（28）连接到电负载的电负载（14）顺序断开的系统。 本发明的第一实施例立即断开检测到需要断开第一源功率的跳闸条件的相位，并且在检测到零电流时检测到没有检测到跳闸条件的第一电源（12）的相位断开 在这些阶段。 在本发明的第二实施例中，当检测到需要断开第一电源的任何一个相中的跳闸条件时，第一电源（12）的每个相位立即从电负载（14）断开， 。 在本发明的两个实施例中，第二备用电源（28）的相位在检测到各个相位中零电压点的发生时被连接。 在该系统中存在的特征之一是当第二备用电源不在线时产生的禁止信号，其阻止第一电源从电负载断开。

公开(公告)号：US4812943A

公开(公告)日：1989-03-14

申请号：US137583

申请日：1987-12-24

申请人： Gregory D. Jones ,  William R. Owens ,  Clifford G. Thiel ,  Clive M. Danby

发明人： Gregory D. Jones ,  William R. Owens ,  Clifford G. Thiel ,  Clive M. Danby

IPC分类号： G01R19/165 ,  H02H3/08 ,  H02H3/093

CPC分类号： H02H3/0935 ,  H02H9/02 ,  H02H9/041

摘要： An overcurrent protection system (10) for a power supply is disclosed. The system monitors the instantaneous flow of current between a power supply (12) and an electrical load (16) to detect when the flow of current exceeds a maximum rated amount. A counter (30) is used for counting the number of times that samples of the flow of current exceed the maximum rated amount synchronous with zero current crossing to generate a trip signal when a predetermined count is reached which disconnects the power supply (12) from the load. The counter (30) is decremented each time a predetermined time interval elapses in which the flow of current above the maximum rate is not detected as measured from a point of zero current flow between the power supply (12) and the electrical load (14). The invention may be used for both AC and DC power supplies.

摘要翻译： 公开了一种用于电源的过电流保护系统（10）。 系统监测电源（12）和电气负载（16）之间的电流的瞬时流量，以检测何时电流超过最大额定值。 计数器（30）用于计数当流过电流超过最大额定量时与零电流交叉同步的次数，以在达到预定计数时断开电源（12）的计数，以产生跳闸信号 负载。 每当从电源（12）和电负载（14）之间的零电流流量测量时，经过预定时间间隔的计数器（30）被递减，在该预定时间间隔内没有检测到高于最大速率的电流， 。 本发明可以用于交流和直流电源。

公开(公告)号：US4814934A

公开(公告)日：1989-03-21

申请号：US137735

申请日：1987-12-24

申请人： Gregory D. Jones ,  William R. Owens ,  Clifford G. Thiel ,  Clive M. Danby

发明人： Gregory D. Jones ,  William R. Owens ,  Clifford G. Thiel ,  Clive M. Danby

IPC分类号： G01R19/165 ,  H02H3/20 ,  H02H3/247 ,  H02J9/06 ,  H02H3/24

CPC分类号： H02J9/061

摘要： A voltage fault detector (10) for producing a trip signal causing switching from a first AC voltage source (12) to a second AC voltage source (14) is disclosed. A plurality of comparators (18,20,22) monitor a signal which is proportional to the magnitude of the voltage of a first AC voltage source (12) to determine if sample values fall within predetermined ranges. A counter (30) counts the number of samples falling outside the predetermined range to generate the trip signal when the count reaches a predetermined limit. The counter (30) is augmented for each sample which is outside the predetermined range and decremented for each sample which is within the predetermined range. A plurality of latches (24,26,28) are respectively coupled to a different one of the comparators for applying the output level signal from one of the comparators to the counter at predetermined times under the control of clock signal pulse trains generated by a combinational logic circuit (32) which are respectively applied to a different one of the plurality of latches. The voltage fault detector (10) may be used to monitor the condition of one or more phases of a backup voltage source.

摘要翻译： 公开了一种用于产生导致从第一AC电压源（12）切换到第二AC电压源（14）的跳闸信号的电压故障检测器（10）。 多个比较器（18,20,22）监视与第一AC电压源（12）的电压的大小成比例的信号，以确定采样值是否落在预定范围内。 当计数达到预定极限时，计数器（30）计数落在预定范围之外的样本数以产生跳闸信号。 针对在预定范围之外的每个样品增加计数器（30），并且对于在预定范围内的每个样品递减计数器（30）。 多个锁存器（24,26,28）分别耦合到不同的一个比较器，用于在由组合的时钟信号脉冲串的控制下的预定时间施加来自比较器之一的输出电平信号 逻辑电路（32）分别施加到多个锁存器中的不同的一个。 电压故障检测器（10）可用于监视备用电压源的一个或多个相的状态。

公开(公告)号：US5006772A

公开(公告)日：1991-04-09

申请号：US439720

申请日：1989-11-21

申请人： Clive M. Danby

发明人： Clive M. Danby

IPC分类号： H02P8/34

CPC分类号： H02P8/34

摘要： A position monitor is provided for use in conjunction with a stepper motor wherein two imputs are provided to the monitor from the stepper motor phase windings. A first signal is provided which indicates, by pulses, the rising and falling edges of in the magnitudes of both phase winding signals. A second signal is provided to indicate the direction of rotation of the stepper motor. The first and second signals are used as inputs to a plurality of counters which maintain a digital value representing the position of the stepper rotor. The digital value is converted to an analog value and amplified for use as a signal representing, by its magnitude, the precise position of the rotor of the stepper motor. The monitor therefore maintains a digital value and outputs a voltage signal which represent the position of a stepper motor rotor as it rotates through a plurality of clockwise and/or counter-clockwise revolutions.

摘要翻译： 提供了与步进电机一起使用的位置监视器，其中从步进电机相绕组向监视器提供两个输入。 提供第一信号，其通过脉冲指示两个相绕组信号的幅度的上升沿和下降沿。 提供第二信号以指示步进电机的旋转方向。 第一和第二信号用作保持表示步进转子的位置的数字值的多个计数器的输入。 数字值被转换为模拟值，并被放大以用作其幅度表示步进电动机的转子的精确位置的信号。 因此，监视器保持数字值，并输出表示步进电动机转子在多个顺时针和/或逆时针转动时旋转的位置的电压信号。

公开(公告)号：US5434771A

公开(公告)日：1995-07-18

申请号：US167436

申请日：1993-12-14

申请人： Clive M. Danby ,  Robert G. Glass

发明人： Clive M. Danby ,  Robert G. Glass

IPC分类号： H02M7/48 ,  H02M7/493 ,  H02M7/515

CPC分类号： H02M7/493

摘要： A control for an inverter system having first and second inverters that produce inverter outputs wherein the inverter outputs are combined by an interphase transformer (IPT) to produce an AC output includes circuitry for detecting a magnitude of a harmonic component in the AC output waveform and circuitry for developing first and second PWM control waveforms for controlling the first and second inverters, respectively. The second PWM control waveform is phase delayed relative to the first PWM control waveform to in turn regulate the magnitude of the harmonic component and DC content across the IPT is controlled to prevent damage to the IPT.

摘要翻译： 具有产生逆变器输出的逆变器输出的逆变器系统的控制，其中逆变器输出由相间变压器（IPT）组合以产生AC输出包括用于检测AC输出波形中的谐波分量的大小的电路和电路 用于开发用于分别控制第一和第二逆变器的第一和第二PWM控制波形。 第二个PWM控制波形相对于第一个PWM控制波形相位延迟，进而调节谐波分量的幅度，并控制IPT上的直流含量，以防止损坏IPT。

公开(公告)号：US4811136A

公开(公告)日：1989-03-07

申请号：US137575

申请日：1987-12-24

申请人： Gregory D. Jones ,  William R. Owens ,  Clifford G. Thiel ,  Clive M. Danby

发明人： Gregory D. Jones ,  William R. Owens ,  Clifford G. Thiel ,  Clive M. Danby

IPC分类号： G06F1/30 ,  H02H3/08 ,  H02H3/20 ,  H02J9/06 ,  H02H3/38

CPC分类号： H02H3/207 ,  G06F1/30 ,  H02H3/083 ,  H02J9/06

摘要： A power supply system for processing current and voltage faults is disclosed. Each phase of a first power source (12) and each phase of a second power source (28) has a pair of switches (60, 64) for controlling the conduction of current from the phase of the power source to a phase load (29). In each of the phases of the first power source (12), a first switch (60) is controlled by a first control signal which has a high level when a voltage fault or current fault condition does not exist. When either a voltage fault or a current fault condition exists, the first switch (60) is turned off. The second switch (64) is turned on by a second control signal during a determination of whether a current fault exists. Furthermore, a logic network causes the first control signal to assume the second level in response to any one of an RMS over/under voltage fault, an instantaneous overcurrent fault, an I.sup.2 t fault, or an instantaneous voltage fault occurring in the phase to which the switches are connected or in any one of the other phases in the first power source. Upon the detection of a voltage fault condition, the first power source (12) is disconnected from the load and a second power source is connected to the load. All of the phases of the first power source are disconnected either immediately in response to the detection of a fault in any one of the phases or, alternatively, the phase with the fault is immediately disconnected and the remaining phases without a fault are disconnected at the zero current crossing points of the AC signal of the phases. The phases of the second source are connected at a point when the voltage of the phase is zero.

摘要翻译： 公开了一种用于处理电流和电压故障的电源系统。 第一电源（12）和第二电源（28）的每相的每相具有一对开关（60,64），用于控制从电源的相位到相位负载的电流的导通（29 ）。 在第一电源（12）的每个相中，当不存在电压故障或电流故障条件时，第一开关（60）由具有高电平的第一控制信号控制。 当存在电压故障或当前故障状况时，第一开关（60）关闭。 在确定当前故障是否存在的过程中，第二开关（64）由第二控制信号导通。 此外，逻辑网络使得第一控制信号响应于RMS过/欠电压故障，瞬时过电流故障，I2t故障或瞬时电压故障中的任何一个而呈现第二电平， 开关连接或在第一电源中的任何其他相中。 在检测到电压故障状况时，第一电源（12）与负载断开，第二电源连接到负载。 第一电源的所有阶段都将立即断开，以响应任何一个相中的故障的检测，或者，故障相位立即断开，并且没有故障的剩余相位在 相电流交流信号的零电流交叉点。 第二源的相位在相位电压为零时的点连接。