-
公开(公告)号：US5073848A
公开(公告)日：1991-12-17
申请号：US616965
申请日：1990-11-21
CPC分类号： G05F1/577 , H02H7/125 , H02J1/102 , H02J1/108 , Y10T307/391 , Y10T307/707
摘要： A power distribution system for supplying power to a plurality of point-to-load power supplies includes a plurality of bulk power supplies, each having a separate respective power distribution bus coupled at the output thereof. Each power distribution bus is coupled to each point-of-load power supply through an OR gate such that if one or more of the bulk power supplies fails, or if a fault occurs on one or more of the power distribution buses, then the point-of-load power supplies are unaffected because they continue to receive power from the other bulk power supplies via the respective OR gates. Furthermore, if a power distribution bus becomes short-circuited to ground, the current therein is limited electronically by the respective bulk power supply. Hence, the power distribution buses are protected against overcurrent without the need for a multitude of dc circuit breakers.
摘要翻译： 用于向多个点对点电源供电的配电系统包括多个大容量电源，每个大容量电源具有在其输出端耦合的单独的相应配电总线。 每个配电总线通过或门耦合到每个负载点电源，使得如果一个或多个大容量电源故障，或者如果在一个或多个配电总线上发生故障，则该点 负载电源不受影响，因为它们通过相应的或门继续从其他大容量电源接收电力。 此外，如果配电总线短路到地，则其中的电流由相应的大容量电源电子限制。 因此，配电总线不受过电流的保护，而不需要多个直流断路器。
-
公开(公告)号：US10131234B2
公开(公告)日：2018-11-20
申请号：US13406241
申请日：2012-02-27
摘要： According to an aspect of the invention, a motor drive circuit includes a first energy storage device configured to supply electrical energy, a bi-directional DC-to-DC voltage converter coupled to the first energy storage device, a voltage inverter coupled to the bi-directional DC-to-DC voltage converter, and an input device configured to receive electrical energy from an external energy source. The motor drive circuit further includes a coupling system coupled to the input device, to the first energy storage device, and to the bi-directional DC-to-DC voltage converter. The coupling system has a first configuration configured to transfer electrical energy to the first energy storage device via the bi-directional DC-to-DC voltage converter, and has a second configuration configured to transfer electrical energy from the first energy storage device to the voltage inverter via the bi-directional DC-to-DC voltage converter.
-
公开(公告)号：US5608771A
公开(公告)日：1997-03-04
申请号：US547078
申请日：1995-10-23
摘要： Power is transferred from a stationary power supply to a rotational gantry in a computer tomography (CT) system through a rotary transformer arranged in a ring configuration with an inner diameter that is sufficiently large to receive a patient. The rotary transformer has a toroidal rotor core and a toroidal stator core arranged either concentrically with an air gap extending radially therebetween or side-by-side with an air gap extending axially therebetween. A resonant inverter provides ac power to the rotary transformer which, in turn, drives a high-voltage tank circuit coupled to a x-ray tube, the tank circuit and x-ray tube being mounted on a rotational gantry. Advantageously, this is a contactless power transfer system which eliminates conventional brush and slip ring arrangements and moreover avoids the need for mounting the inverter to rotate with the CT gantry.
摘要翻译： 电力通过布置成具有足够大以容纳患者的内径的环形结构的旋转变压器从计算机断层摄影（CT）系统中的固定电源传送到旋转台架。 旋转变压器具有环形转子芯和环形定子芯，该环形定子芯同心地布置有与其间径向延伸的气隙，或者与其间轴向延伸的气隙并排布置。 谐振逆变器为旋转变压器提供交流电力，旋转变压器又驱动耦合到X射线管的高压电路，电路和X射线管安装在旋转机架上。 有利地，这是一种非接触式电力传输系统，其消除了常规的刷和滑环布置，并且还避免了安装逆变器以与CT机架一起旋转的需要。
-
公开(公告)号：US5359180A
公开(公告)日：1994-10-25
申请号：US956131
申请日：1992-10-02
CPC分类号： F03H1/0018 , G05F1/59 , H02J1/102 , H02J9/061 , H02J1/108 , Y10T307/653 , Y10T307/724
摘要： A power supply system for thrusters (e.g., arcjet thrusters) in a spacecraft system comprises lightweight, redundant power supplies that share the power distribution function to the thrusters. Each power supply comprises a plurality of parallel-connected power supply subunits of which the combined power output capability exceeds the required maximum power demand by at least one subunit capacity for each arcjet thruster in the system. Each power supply subunit comprises a lightweight, high-frequency, soft-switching power supply. For arcjet systems comprising arcjet thrusters that do not operate simultaneously, relays are employed to switch between thrusters.
摘要翻译： 在航天器系统中的用于推进器（例如，电弧喷射推进器）的供电系统包括与推进器共享功率分配功能的轻量级冗余电源。 每个电源包括多个并联连接的电源子单元，其中组合的功率输出能力超过系统中每个电弧喷射推进器的至少一个子单元容量所需的最大功率需求。 每个电源子单元包括轻便的高频软开关电源。 对于包括不同时操作的电弧喷射推进器的电弧喷射系统，采用继电器在推进器之间切换。
-
5.发明授权High-efficiency, high-density, power supply including an input boost power supply 失效高效，高密度的电源，包括输入升压电源
公开(公告)号：US5060130A
公开(公告)日：1991-10-22
申请号：US571382
申请日：1990-08-23
CPC分类号： H02M3/285 , H02J1/102 , H02M3/28 , H02M3/3376 , Y02B70/1433
摘要： A power supply includes a dc-to-dc converter with an integral boost power supply for maintaining the effective converter input voltage within a predetermined steady-state range, even if the input voltage to the power supply exhibits substantial voltage transients. In one preferred embodiment, the boost power supply comprises a boost transformer and a rectifier, and the converter comprises two parallel-coupled resonant converter modules, each including either a half-bridge or full-bridge connection of switching devices and a resonant circuit. The primary winding of the boost transformer is coupled between the junctions joining the switching devices of the resonant converter bridges. When the power supply input voltage is outside the steady-state voltage range, the boost power supply is activated by phase shift control of the voltage across the primary winding of the boost transformer.
摘要翻译： 电源包括具有积分升压电源的DC-DC转换器，用于将有效转换器输入电压保持在预定的稳态范围内，即使电源的输入电压呈现相当大的电压瞬变。 在一个优选实施例中，升压电源包括升压变压器和整流器，并且转换器包括两个并联耦合谐振转换器模块，每个并联耦合谐振转换器模块包括开关器件的半桥或全桥连接以及谐振电路。 升压变压器的初级绕组耦合在连接谐振转换器桥的开关装置的结之间。 当电源输入电压超出稳态电压范围时，升压电源由升压变压器初级绕组两端的电压的相移控制激活。
-
6.发明授权
公开(公告)号：US4758940A
公开(公告)日：1988-07-19
申请号：US45655
申请日：1987-05-04
CPC分类号： H02M3/3376 , Y02B70/1433
摘要： A control circuit for insuring super-resonant operation of a DC-to-AC resonant converter, having a resonance circuit with a resonant frequency F.sub.r, in which a circulating current i.sub.r flows between a first node A, alternatingly connected between an input potential and a primary common potential at an operating frequency F, and a second node B, includes: a subcircuit for generating a first signal representative of the phase of the circulating current i.sub.r ; another subcircuit for generating a second signal representative of the phase of a potential V.sub.AB between the first and second nodes; and a comparator which compares the first and second signals to increase the operating frequency F if the phase of the circulating current i.sub.r leads the phase of the node-to-node potential V.sub.AB. The reasonance circuit can be a series, parallel or series-parallel resonant arrangement, typically driven by a pair of alternatingly-conductive semiconductor switching devices, themselves driven by a voltage-controlled oscillator (VCO). In one embodiment, the VCO frequency is increased whenever a current zero crossing occurs before the end of a VCO waveform half-cycle.
摘要翻译： 一种用于确保具有谐振频率Fr的谐振电路的DC-AC谐振变换器的超谐振操作的控制电路，其中循环电流ir在第一节点A之间流动，第一节点A交替地连接在输入电位和 工作频率F的主要共同电位和第二节点B包括：用于产生表示循环电流ir的相位的第一信号的分支电路; 用于产生表示第一和第二节点之间的电位VAB的相位的第二信号的另一个子电路; 以及比较器，其比较第一和第二信号以增加工作频率F，如果循环电流ir的相位导致节点到节点电位VAB的相位。 合理电路可以是串联，并联或串并联谐振装置，通常由本身由压控振荡器（VCO）驱动的一对交替导电半导体开关器件驱动。 在一个实施例中，每当在VCO波形半周期结束之前发生电流过零点时，VCO频率增加。
-
7.发明授权Regenerative unipolar converter for switched reluctance motors using one main switching device per phase 失效用于开关磁阻电机的再生单极转换器，每相使用一个主开关装置
公开(公告)号：US4684867A
公开(公告)日：1987-08-04
申请号：US615655
申请日：1984-05-31
CPC分类号： H02P3/065 , H02P25/092 , H02P25/0925 , H02P6/24
摘要： In a converter for a switched reluctance motor, a dump capacitor receives freewheeling current from each phase and resupplies the charge to the dc supply. In this manner, residual magnetic energy is recovered and phase current quickly reduced while the converter requires only one main switching device and one freewheeling device per phase and the converter allows a unipolar source to be used.
摘要翻译： 在用于开关磁阻电机的转换器中，转储电容从每相接收续流电流，并将电荷补充到直流电源。 以这种方式，恢复剩余磁能并且相电流快速降低，而转换器仅需要一个主开关器件和每相一个续流器件，并且转换器允许使用单极源。
-
公开(公告)号：US4456839A
公开(公告)日：1984-06-26
申请号：US242761
申请日：1981-03-11
IPC分类号： H03K17/567 , H03K17/73 , H03K17/10 , H03K17/60 , H03K17/72
CPC分类号： H03K17/567 , H03K17/73
摘要： A high gain latching Darlington transistor comprises a gate turn-off thyristor and a load transistor coupled in Darlington configuration. Circuit means including a diode are coupled to the gate turn-off thyristor and the transistor to provide a low loss path for load transistor current which reverse biases the gate-cathode junction of the thyristor at thyristor turn-off to prevent premature device conduction. The latching Darlington transistor configured in this manner thus operates as a conventional gate turn-off thyristor, capable of being pulsed into and out of conduction, but yet exhibits improved dv/dt capability and increased turn-off gain, typically between 10 and 100 times the turn-off gain of the individual gate turn-off thyristor.
摘要翻译： 高增益闭锁达林顿晶体管包括栅极截止晶闸管和以达林顿配置耦合的负载晶体管。 包括二极管的电路装置耦合到栅极截止晶闸管和晶体管，以为负载晶体管电流提供低损耗路径，其在晶闸管截止时反向偏置晶闸管的栅极 - 阴极结，以防止器件过早传导。 以这种方式配置的闭锁达林顿晶体管因此可以作为传统的栅极截止晶闸管工作，能够被脉冲输入和导出，但是具有改进的dv / dt能力和增加的关断增益，通常在10到100倍之间 单个门极关断晶闸管的关断增益。
-
公开(公告)号：US4426564A
公开(公告)日：1984-01-17
申请号：US323610
申请日：1981-11-20
CPC分类号： H05B6/062 , H02M7/53803 , H05B6/1272 , Y02B40/126 , Y02B70/1441
摘要： A parallel resonant induction cooking surface unit comprises a voltage fed inverter which drives a load circuit, comprised of a main induction drive coil, a tuning capacitor coupled in parallel with the main induction drive coil, and an inductor coupled in series with the main induction drive coil, with a square wave voltage, causing the main induction drive coil to generate a time variant magnetic field resulting in eddy currents being induced in the surface of a metallic, food-containing utensil positioned adjacent to the main induction drive coil, and hence, utensil heating. By tuning the load circuit to resonance at or near the square wave frequency, reactive currents therein are minimized, resulting in improved power factor. Moreover, resultant main induction drive coil voltage and current are nearly sinusoidal, thereby achieving reduced electromagnetic interference radiation at frequencies greater than the square wave frequency.
摘要翻译： 并联谐振感应烹调表面单元包括驱动负载电路的电压馈送逆变器，负载电路包括主感应驱动线圈，与主感应驱动线圈并联耦合的调谐电容器和与主感应驱动器串联连接的电感器 线圈，具有方波电压，导致主感应驱动线圈产生时变磁场，导致在与主感应驱动线圈相邻定位的金属食品容纳器具的表面中产生涡流， 器具加热。 通过将负载电路调谐到等于或接近方波频率的谐振，其中的无功电流被最小化，导致改善的功率因数。 此外，所得到的主感应驱动线圈的电压和电流几乎是正弦的，从而在大于方波频率的频率下实现减少的电磁干扰辐射。
-
公开(公告)号：US4424557A
公开(公告)日：1984-01-03
申请号：US334843
申请日：1981-12-28
IPC分类号： H02M7/5387 , H02P13/20 , H02M7/537
CPC分类号： H02M7/53871 , Y10T307/516
摘要： Method and apparatus for evenly distributing the switching duty among power transistors in a full bridge inverter controlled by current band PWM, by switching first the top half of the bridge and then the lower half of the bridge to shape the output current waveform.
摘要翻译： 通过首先切换桥的上半部分，然后切换桥的下半部分以形成输出电流波形，在由当前频带PWM控制的全桥逆变器中均匀分配功率晶体管之间的开关占空比的方法和装置。
-
-
-
-
-
-
-
-
-
搜索结果
85 条记录 (耗时 0.024 秒)
