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公开(公告)号：US09927494B2
公开(公告)日：2018-03-27
申请号：US14417813
申请日：2013-07-12
申请人： Eaton Limited
摘要： A method and apparatus for detecting a missing phase in a 3-phase twelve-pulse autotransformer rectifier unit (ATRU) which, in use, receives a 3-phase input and delivers a nominal DC output on which a common-mode voltage is impressed. At least one of the frequency and amplitude of the common-mode voltage are monitored thereby to determine whether there is a missing phase in the input. The frequency and/or amplitude of the common-mode voltage may also be monitored thereby to determine whether there is a loss of input voltage.
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公开(公告)号：US20160308582A1
公开(公告)日：2016-10-20
申请号：US15103088
申请日：2014-12-05
发明人： Martin BUND , Claus SCHOEPFER
CPC分类号： H04B3/542 , B60R16/02 , H02H3/05 , H02H3/253 , H02J3/1892 , H02J13/0051 , H04B3/46 , H04B3/54 , H04B2203/5408 , H04B2203/5466 , Y02E60/783 , Y02E60/7892 , Y04S40/123 , Y04S40/146
摘要： A system for transmitting power and data, particularly including a half-wave control, includes a control unit connected to grid phases, the system having a phase-failure detection device which has bistable multivibrators, especially bistable multivibrators assigned to a respective grid phase. Each bistable multivibrator has an input for setting and an input for resetting, one of the inputs being connected to a digitizing device for digitizing the positive half-waves of a respective grid phase, the other of the inputs being connected to a digitizing device for digitizing the negative half-waves of a respective grid phase. The effective value of the output voltage of the bistable multivibrator is compared by a comparison device to a threshold value to detect a phase failure.
摘要翻译： 用于发送功率和数据的系统，特别是包括半波控制的系统包括连接到电网相的控制单元，该系统具有相位故障检测装置，该装置具有双稳态多谐振荡器，特别是分配给相应电网相的双稳态多谐振荡器。 每个双稳态多谐振荡器具有用于设置的输入和用于复位的输入，其中一个输入连接到用于数字化相应电网相的正半波的数字化装置，另一个输入连接到用于数字化的数字化装置 相应电网相的负半波。 将双稳态多谐振荡器的输出电压的有效值通过比较装置与阈值进行比较，以检测相位故障。
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公开(公告)号：US20130208382A1
公开(公告)日：2013-08-15
申请号：US13727198
申请日：2012-12-26
IPC分类号： H02H3/253
CPC分类号： H02H3/253 , H02M1/081 , H02M1/15 , H02M1/40 , H02M5/2573 , H05B39/048 , H05B39/08 , Y02B20/148 , Y10S315/04
摘要： A protection circuit for protecting a dimmer circuit controlling an inductive load including an imbalance detector for detecting an asymmetrical operation in the load and circuit control means for causing the dimmer circuit to reduce a DC component in the load upon detection of the asymmetrical operation. A load imbalance detector is also disclosed having a load DC component detector, a comparator and a signal generating means for generating a circuit shut down signal if the DC component exceeds a pre-set DC threshold.
摘要翻译： 一种保护电路，用于保护控制包括不平衡检测器的电感负载的调光电路，用于检测负载中的不对称运行和电路控制装置，用于在检测到不对称操作时使调光器电路减小负载中的直流分量。 还公开了一种负载不平衡检测器，其具有负载DC分量检测器，比较器和用于在DC分量超过预定DC阈值时产生电路关闭信号的信号发生装置。
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公开(公告)号：US20130107401A1
公开(公告)日：2013-05-02
申请号：US13285717
申请日：2011-10-31
申请人： Robert W. Helt
发明人： Robert W. Helt
IPC分类号： H02H7/09
CPC分类号： H02H7/09 , F24F11/30 , H02H3/247 , H02H3/253 , H02H7/0805
摘要： A method is provided for controlling operation of an air conditioning unit. The method comprises supplying line voltage to activate a motor configured to operate the air conditioning unit, and monitoring a supply of control voltage in order to control operation of the air conditioning unit, the supply of control voltage being derived from line voltage. In response to detecting a control voltage below a predetermined threshold and/or by a predetermined percentage, a time delay is initiated. The method further comprises deactivating the motor if a predetermined increase in control voltage is not detected before the time delay expires.
摘要翻译： 提供了一种用于控制空调单元的操作的方法。 该方法包括提供线路电压以激活配置为操作空调单元的电动机，以及监视控制电压的供应，以便控制空调单元的运行，控制电压的提供由线路电压导出。 响应于检测到低于预定阈值和/或预定百分比的控制电压，启动时间延迟。 该方法还包括如果在时间延迟到期之前未检测到控制电压的预定增加，则停用电动机。
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5.发明申请公开(公告)号：US20080180087A1
公开(公告)日：2008-07-31
申请号：US11669786
申请日：2007-01-31
IPC分类号： G01R23/02
CPC分类号： H02H3/253
摘要： Systems and methods that detect a phase loss condition in a three-phase electrical power source are presented. The system includes a detection component that measures and/or monitors a magnitude and frequency of a voltage of a power source, and a controller component that compares measured and/or monitored voltage characteristics to characteristics associated with phase loss.
摘要翻译： 提出了检测三相电源中的相位损失状态的系统和方法。 该系统包括测量和/或监测电源电压的幅度和频率的检测部件，以及将测量和/或监视的电压特性与与相位损耗相关联的特性进行比较的控制器部件。
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6.发明申请Method and apparatus for improving operational reliability during a loss of a phase voltage 有权在相电压损失时提高运行可靠性的方法和装置公开(公告)号：US20060276979A1
公开(公告)日：2006-12-07
申请号：US11432904
申请日：2006-05-12
申请人： Elmo Price
发明人： Elmo Price
IPC分类号： G06F19/00
摘要： The present invention is directed to a method and apparatus for improving operational reliability during a loss of a phase voltage (LOV) in a multi-phase power system, wherein a voltage representative of the LOV phase is calculated. The representative voltage is used for computing a reference polarizing voltage suitable for a protection unit.
摘要翻译： 本发明涉及一种用于在多相电力系统中相位电压（LOV）的损失期间改善操作可靠性的方法和装置，其中计算代表LOV相位的电压。 代表性电压用于计算适用于保护单元的参考极化电压。
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公开(公告)号：US20020093778A1
公开(公告)日：2002-07-18
申请号：US10012159
申请日：2001-10-29
发明人： Peter Meckler
IPC分类号： H01H009/00
摘要： An undervoltage tripping device for a multipolar low-voltage switching device is described. The tripping device contains an electromagnetic tripping mechanism for effectuating a tripping of the multipolar low-voltage switching device given a drop below a predeterminable voltage limit value. The tripping mechanism has a magnetic circuit with a spring-loaded armature and a trip coil including a number of winding portions corresponding to a number of phases of a multiphase power supply circuit. A rectifier bridge is powered by the multiphase power supply circuit. The rectifier bridge has a number of rectifier branches corresponding to the number of the phases of the multiphase power supply circuit. The rectifier bridge is connected to the tripping mechanism and the rectifier branches jointly power the tripping mechanism. The tripping mechanism effectuates an all-pole tripping of the low-voltage switching device given a failure of one of the phases of the multiphase power supply circuit.
摘要翻译： 描述了用于多极低压开关装置的欠电压跳闸装置。 跳闸装置包含电磁跳闸机构，用于在给定低于可预定的电压限制值的情况下，实现多极低压开关装置的跳闸。 跳闸机构具有带有弹簧加载电枢的磁路和包括与多相电源电路的多个相位对应的多个绕组部分的跳闸线圈。 整流桥由多相电源电路供电。 整流桥具有与多相电源电路的相数相对应的多个整流器分支。 整流桥连接到跳闸机构，整流器分支联合为脱扣机构供电。 鉴于多相电源电路中的一个相的故障，跳闸机构可以实现低电压开关器件的全极跳闸。
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8.发明授权
公开(公告)号：US5563758A
公开(公告)日：1996-10-08
申请号：US412818
申请日：1995-03-29
CPC分类号： H02H3/24 , H02H3/253 , H02H9/04 , H02H7/1252
摘要： A power supply circuit receives and rectifies a three phase power source. A first capacitor is coupled to filter and store the rectified three phases and supply the stored energy to a DC/DC converter. The first capacitor is large enough, when all three phases are present, to filter the rectified input power and supply rated voltage to the DC/DC converter between peaks in the phases, but not too large as to adversely affect the power factor. However, when one phase drops out, additional capacitance is required to maintain rated voltage to the DC/DC converter during the periodic absence of the one phase. Thus, a switch and a second capacitor are connected in series with each other and in parallel with the first capacitor. In response to absence of one of the phases, the switch is activated to couple the second capacitor to filter and store the rectified two phases and supply the stored energy to the DC/DC converter. The additional capacitance of the second capacitor is sufficient to maintain rated voltage to the DC/DC converter during the absence of the one phase.
摘要翻译： 电源电路接收并整流三相电源。 耦合第一电容器以过滤并存储经整流的三相，并将存储的能量提供给DC / DC转换器。 当存在所有三相时，第一个电容器足够大，可以对整流的输入电源进行滤波，并在相间的峰值之间为DC / DC转换器提供额定电压，但不要太大，从而不利地影响功率因数。 然而，当一相脱落时，需要额外的电容来在一阶段的周期性不存在期间维持DC / DC转换器的额定电压。 因此，开关和第二电容器彼此串联并且与第一电容器并联连接。 响应于没有其中一个相位，开关被激活以耦合第二电容器以过滤并存储经整流的两相，并将存储的能量提供给DC / DC转换器。 第二电容器的附加电容足以在不存在一相期间保持对DC / DC转换器的额定电压。
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公开(公告)号：US5243489A
公开(公告)日：1993-09-07
申请号：US912437
申请日：1992-08-21
申请人： John J. Dougherty
发明人： John J. Dougherty
IPC分类号： H02H3/253
CPC分类号： H02H3/253
摘要： A protection circuit for three-phase power systems incorporates overcurrent protection along with phase loss and phase imbalance by means of common current sensing transformers. The phase loss and phase imbalance are determined by a pairwise comparison algorithm.
摘要翻译： 用于三相电力系统的保护电路通过公共电流检测变压器包含过电流保护以及相位损失和相位不平衡。 相位失衡和相位不平衡由成对比较算法确定。
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公开(公告)号：US4823226A
公开(公告)日：1989-04-18
申请号：US098101
申请日：1987-09-17
申请人： Ryan T. Reed , Earl J. Curran, Jr.
发明人： Ryan T. Reed , Earl J. Curran, Jr.
摘要： A phase loss detection circuit for a three phase electrical system providing three phase power as to a motor, the three phase electrical being subject to a phase loss condition and a transient condition is disclosed. The transient condition includes starting transients, stopping transients or severe load transients. The phase loss detection circuit distinguishes between a phase loss condition and a transient condition and indicates when a loss of phase has occurred. The phase loss detection circuit comprises a detector for detecting an instantaneous voltage of the electrical system, a sensor for generating an instantaneous voltage signal representing the instantaneous detected voltage, a detector for detecting a peak detected voltage of the electrical system, a generator for generating a peak detected voltage signal representing said peak detected voltage, a comparator for comparing the peak detected voltage with the instantaneous voltage and generating a compared signal, the compared signal comprising a first polarity during steady state operation, a second, opposite polarity during the transient condition and an alternating polarity during the phase loss condition, and a detector for detecting the alternating polarity, thereby indicating the phase loss condition.
摘要翻译： 公开了一种用于三相电力系统的相位损失检测电路，其提供关于电动机的三相电力，三相电气受到相位损失状况和瞬态状态的影响。 瞬态条件包括启动瞬变，停止瞬变或严重负载瞬变。 相位丢失检测电路区分相位损失状态和瞬态状态，并指示何时发生相位损失。 相位丢失检测电路包括用于检测电气系统的瞬时电压的检测器，用于产生表示瞬时检测电压的瞬时电压信号的传感器，用于检测电气系统的峰值检测电压的检测器， 峰值检测电压信号，表示所述峰值检测电压;比较器，用于将峰值检测电压与瞬时电压进行比较，并产生比较信号，所述比较信号在稳态操作期间包括第一极性，在瞬态条件期间包括第二极性， 在相丢失状态下具有交替极性，以及用于检测交流极性的检测器，从而指示相位损失状态。
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