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1. 发明授权

US5337227A Harmonic neutralization of static inverters by successive stagger 失效
标题翻译：静态逆变器谐波中和通过连续错开
公开(公告)号：US5337227A
公开(公告)日：1994-08-09
申请号：US870128
申请日：1992-04-15
申请人： Eric J. Stacey , John Rosa
发明人： Eric J. Stacey , John Rosa
IPC分类号： H02M7/48 , H02M7/49 , H02M1/12
CPC分类号： H02M7/49
摘要： Quasi-harmonic neutralized inverter systems are provided with interphase transformers connected in a waffle tree configuration and each having a pair of inputs for receiving staggered voltage waveforms, wherein the stagger angle of the voltage waveforms reduces a harmonic component of an output voltage on an output terminal of each interphase transformer. Inverters produce voltage waveforms at phase angles necessary to provide the required stagger angles at the inputs of the interphase transformers in a first stage of the waffle tree configuration. A method for quasi-harmonic neutralization of voltages in an inverter system is also provided, in which interphase transformers, each having a pair of inputs for receiving staggered voltage waveforms, are connected in a waffle tree configuration, such that the stagger angle of the voltage waveforms reduces a harmonic component of an output voltage on an output terminal of each interphase transformer. Voltage waveforms at phase angles necessary to provide the stagger angles are applied to the inputs of the interphase transformers in a first stage of the waffle tree configuration.
摘要翻译：准谐波中和逆变器系统设置有以华夫饼树结构连接的相间变压器，每个具有用于接收交错电压波形的一对输入，其中电压波形的交错角度减小输出端子上的输出电压的谐波分量的每个相间变压器。在华夫饼树配置的第一阶段，逆变器产生在相位变压器的输入处提供所需交错角所必需的相位角的电压波形。还提供了一种用于逆变器系统中的电压的准谐波中和的方法，其中每个具有用于接收交错电压波形的一对输入的相间变压器以华夫饼树结构连接，使得电压的交错角波形可以减少每个相间变压器的输出端子上的输出电压的谐波分量。提供交错角所需的相位角的电压波形在华夫饼树配置的第一阶段被施加到相间变压器的输入端。

2. 发明授权

US4460861A Control system for machine commutated inverter-synchronous motor drives 失效
标题翻译：机械换向同步电机驱动控制系统
公开(公告)号：US4460861A
公开(公告)日：1984-07-17
申请号：US544149
申请日：1983-01-21
申请人： John Rosa
发明人： John Rosa
IPC分类号： H02P27/06 , H02P25/02 , H02P5/36
CPC分类号： H02P25/024
摘要： An adjustable speed machine-commutated inverter-synchronous motor drive includes control of the inverter at a selected rate without positioning. The line converter is controlled so as to maintain a relation I=f(T) and the relation E/l=g(T) is established by applying to the field regulator loop a reference which is a function of T, where T is the torque, I the current drawn by the motor drive and E the excitation voltage. Accordingly, the torque is not sensed. The functions are chosen so that the commutation margin angle is safe under natural commutation by the EMF of the motor and also chosen to improve drive operation.
摘要翻译：可调速换向换向器 - 同步电动机驱动器包括以不选择的速率以选定的速度控制变频器。控制线路转换器以保持关系I = f（T），并且通过向场调节器环施加作为T的函数的参考来建立关系E / l = g（T），其中T是扭矩，I是电动机驱动的电流，E是励磁电压。因此，没有感测到转矩。选择这些功能，使得换向裕度角在电动机的EMF自然换向下是安全的，并且还被选择来改善驱动器操作。

3. 发明授权

US4366532A AC/DC or DC/AC Converter system with improved AC-line harmonic reduction 失效
标题翻译： AC / DC或DC / AC转换器系统，具有改进的AC线路谐波抑制
公开(公告)号：US4366532A
公开(公告)日：1982-12-28
申请号：US262726
申请日：1981-05-11
申请人： John Rosa , Raymond J. Radus
发明人： John Rosa , Raymond J. Radus
IPC分类号： H02M7/06 , H02M7/162 , H02M7/08 , H02M7/17
CPC分类号： H02M7/162
摘要： In a transformer-rectifier converter system, at least one inductance is inserted in the commutation path of two adjacent diode or thyristor devices in a cluster of three devices related to a common DC polarity pole, the reactance due to such inductance being sufficient to lengthen the commutation overlap thereby to minimize AC line harmonics. The invention is applicable to AC/DC as well as to DC/AC conversion.
摘要翻译：在变压器 - 整流器转换器系统中，至少一个电感插入到与公共直流极性极相关的三个装置的集群中的两个相邻的二极管或晶闸管装置的换向路径中，由于这种电感的电抗足以延长换相重叠，从而最小化交流线路谐波。本发明适用于AC / DC以及DC / AC转换。

4. 发明授权

US5068774A 24-pulse hexagon-type AC/DC static converter 失效
标题翻译： 24脉冲六角形AC / DC静态转换器
公开(公告)号：US5068774A
公开(公告)日：1991-11-26
申请号：US620809
申请日：1990-12-03
申请人： John Rosa
发明人： John Rosa
IPC分类号： H02M7/155
CPC分类号： H02M7/1552
摘要： An AC/DC or DC/AC converter includes a single hexagon transformer with each side connected to opposite polarity DC terminals through two pairs of SCR devices gated in sequence synchronously with the frequency of the AC lines, gating in a pair lagging gating of the next SCR device in the adjoining pair, to create a 24-pulse output, while minimizing AC line harmonic contents, especially the 11th and 13th harmonics.
摘要翻译： AC / DC或DC / AC转换器包括单个六边形变压器，其每侧通过两对SCR器件连接到相反极性的直流端子，两对SCR器件与AC线路的频率同步地选通，门控在下一个对的滞后门控 SCR器件在相邻的对中，以产生24脉冲输出，同时最小化AC线谐波含量，特别是第11和第13谐波。

5. 发明授权

US4814964A Variable speed a-c drive 失效
标题翻译：变速a-c驱动
公开(公告)号：US4814964A
公开(公告)日：1989-03-21
申请号：US149234
申请日：1988-01-27
申请人： Colin D. Schauder , John Rosa , Theodore M. Heinrich
发明人： Colin D. Schauder , John Rosa , Theodore M. Heinrich
IPC分类号： H02P1/46 , H02P25/02 , H02P27/06 , H02M5/45
CPC分类号： H02P1/46 , H02P25/024
摘要： A load commutated inverter (LCI) a-c drive system includes a synchronous motor with two 30 degree angularly displaced sets of three-phase windings. Each set of motor windings is powered by a three-phase inverter fed by a three-phase rectifier in a separate d-c loop. The three-phase rectifiers are fed by either a generator with two angularly displaced sets of three-phase windings or by a transformer with a three-phase primary winding, and delta and wye secondary windings separately supplying the two rectifiers. Twelve-pulse operation in the line commutated mode with substantially constant d-c link currents significantly reduces torque pulsations. At low speeds, sinusoidal segment pulsed d-c currents in the d-c links are gated to pairs of windings in the two sets of motor windings which generate component MMFs either 90 degrees or 150 degrees displaced to produce a resultant rotating motor MMF of constant magnitude to completely eliminate torque pulsations. Since the repetition rates of the pulsed d-c link currents in these two instances are 2 and 1.2 times the fundamental motor frequency respectively, the range of motor speeds over which torque pulsations can be completely eliminated is substantially increased, while torque pulsations at all higher speeds are greatly reduced.

6. 发明授权

US4638138A High frequency inverter circuit for melting and induction heating 失效
标题翻译：高频变频电路用于熔化和感应加热
公开(公告)号：US4638138A
公开(公告)日：1987-01-20
申请号：US633775
申请日：1984-07-23
申请人： John Rosa , William E. Frank
发明人： John Rosa , William E. Frank
IPC分类号： H02M7/515 , H05B6/04
CPC分类号： H05B6/04 , H02M7/5157
摘要： A two-pole inverter bridge has an inductor mounted between the two controlled switches in each pole and a resonant load is connected across the poles between ends of the inductors which are similarly situated relative to the terminals. In each pole one antiparallel circuit includes an auxiliary controlled switch and another antiparallel circuit includes only a diode. Fault protection is provided with an auxiliary source mounted between opposite ends of the inductors for applying reverse bias to the controlled switches of the poles whenever a fault in the inverter is detected.
摘要翻译：两极逆变桥具有安装在每个极中的两个受控开关之间的电感器，并且谐振负载连接在电感器两端之间的两极之间，其相对于端子类似地定位。在每个极中，反并联电路包括辅助控制开关，另一个反并联电路仅包括二极管。故障保护提供有安装在电感器的相对端之间的辅助源，每当检测到逆变器的故障时，将反向偏压施加到极的受控开关。

7. 发明授权

US4210860A VAR Generator with current sensitive inductance break point 失效
标题翻译： VAR发电机具有电流敏感电感断点
公开(公告)号：US4210860A
公开(公告)日：1980-07-01
申请号：US942838
申请日：1978-09-15
申请人： John Rosa , Laszlo Gyugyi
发明人： John Rosa , Laszlo Gyugyi
IPC分类号： G05F1/70 , H02J3/18
CPC分类号： H02J3/1828 , Y02E40/12 , Y02E40/30
摘要： The static VAR generator of the fixed capacitor switch-controlled inductor type is taught. The inductive element has a break point in its inductive characteristic. That is, below a certain predetermined current, the inductance is one value and above the latter current the inductance is another value. This has the effect of providing a reduced value of inductive reactance above a certain inductive current level thus making it possible to significantly increase the inductive current above its normal range with a small increase of the switch conduction interval. In one case a saturable iron core reactor is utilized to achieve the break point and in another case two inductive elements are provided--one of which is controlled by a switch which places the latter inductor into circuit arrangement with the first at the time that the current exceeds the predetermined value.
摘要翻译：教授了固定电容开关控制电感器类型的静态VAR发生器。电感元件的感应特性有断点。也就是说，低于一定的预定电流时，电感是一个值，高于后一个电流，电感是另一个值。这具有将感抗降低的值提高到高于某一感应电流水平的效果，从而使得可以以小的开关导通间隔的增加使感应电流显着地增加到其正常范围之上。在一种情况下，利用可饱和铁芯电抗器来实现断点，并且在另一种情况下，提供两个感应元件，其中一个电感元件由开关控制，该开关将后一电感器放置成电路布置，其中电流为电流超过预定值。

8. 发明授权

US3991354A Variable speed drive for induction motor 失效
标题翻译：异步电机变速驱动
公开(公告)号：US3991354A
公开(公告)日：1976-11-09
申请号：US581981
申请日：1975-05-29
申请人： John Rosa , Alec H. B. Walker
发明人： John Rosa , Alec H. B. Walker
IPC分类号： H02P27/04 , H02P7/42
CPC分类号： H02P27/045
摘要： A variable speed drive is provided for a polyphase induction motor. The motor is connected through a contactor to a constant frequency polyphase alternating current power source for starting and for full speed operation but is supplied by a variable frequency source in a single phase operating mode when reduced speed levels are desired. In the single phase operating mode, low speed operation is provided by driving the motor with a cycloconverter which converts power from the polyphase source to single phase alternating current of a predetermined lower frequency. The motor speed decreases from a higher level to a lower level by coasting, with gate signals of the cycloconverter suppressed until a desired lower speed is reached. Initiation of contactor and cycloconverter operation is coordinated by motor speed sensing means.
摘要翻译：为多相感应电动机提供变速驱动器。电动机通过接触器连接到恒定频率的多相交流电源，用于起动和全速运行，但是当需要降低的速度时，由单相运行模式的可变频率源供电。在单相工作模式中，通过使用将多相电源的功率转换成预定的较低频率的单相交流电的循环变频器来驱动电动机来提供低速运行。马达速度通过滑行从较高的水平降低到较低的水平，同时抑制循环换流器的门信号，直到达到所需的较低速度。接触器和循环换流器操作的启动由电动机速度检测装置协调。

9. 发明授权

US4358818A Thyristor-controlled AC/DC converter system 失效
标题翻译：晶闸管控制AC / DC转换器系统
公开(公告)号：US4358818A
公开(公告)日：1982-11-09
申请号：US264871
申请日：1981-05-18
申请人： John Rosa
发明人： John Rosa
IPC分类号： H02M7/155 , G05F1/10 , H02M7/06 , H02M7/12 , H02M7/162 , H02M1/12
CPC分类号： H02M7/1623
摘要： In a thyristor-controlled converter system the non-canonical harmonics are minimized by active filtering through control of the firing angle of the thyristors in accordance with the undesired harmonic component.
摘要翻译：在晶闸管控制的转换器系统中，通过根据不期望的谐波分量控制晶闸管的触发角通过有源滤波来使非规范谐波最小化。

10. 发明授权

US4274135A Gating circuit for high voltage thyristor strings 失效
标题翻译：高压晶闸管串门电路
公开(公告)号：US4274135A
公开(公告)日：1981-06-16
申请号：US6831
申请日：1979-01-26
申请人： John Rosa , Laszlo Gyugyi
发明人： John Rosa , Laszlo Gyugyi
IPC分类号： H02M1/08 , H02M1/092 , H02M5/25 , H03K17/10 , H03K17/725 , H02M7/00
CPC分类号： H02M1/092 , H02M5/25
摘要： Electrical apparatus such as a VAR generator or convertor is taught for high-voltage application. The electrical apparatus includes series stacked silicon controlled rectifiers, some of which operate at high electrical potential. Switching information is provided to the thyristors by way of insulating light pipes. The energy for actuating the gate of the thyristor in each case is provided by a current transformer which in some instances is interconnected with the anode of the thyristor in question to monitor the anode current thereof in a previous half cycle of conduction. In other instances, anode current of another thyristor are monitored. The anode current is converted to stored charge which is later released through a light actuated switch to the gate for energization of the thyristor in question. This means that a thyristor may be repeatedly energized even after many intervals of full cycle conduction where no anode to cathode potential is available for charging a capacitor.
摘要翻译：电气设备如VAR发生器或转换器被教导用于高电压应用。电气设备包括串联堆叠的可控硅整流器，其中一些整流器工作在高电位。开关信息通过绝缘光管提供给晶闸管。在每种情况下用于致动晶闸管的栅极的能量由电流互感器提供，电流互感器在一些情况下与所讨论的可控硅的阳极互连以在前一个半导体周期中监测其阳极电流。在其他情况下，监视另一个晶闸管的阳极电流。阳极电流转换成储存的电荷，后者通过光致动开关释放到栅极，以激励所讨论的晶闸管。这意味着，即使在许多间隔的全周期导通之后，晶闸管也可以反复通电，其中没有阳极至阴极电位可用于对电容器充电。

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