公开(公告)号：US3707665A

公开(公告)日：1972-12-26

申请号：US3707665D

申请日：1971-11-12

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： GYUGYI LASZLO

IPC: H02M1/00 ,  H02M1/42 ,  H02M5/27 ,  H02M5/22

CPC classification number: H02M1/4216 ,  H02M5/271 ,  Y02B70/126

Abstract: The invention relates to the operation of a frequency changer system comprised of bilateral switching elements in which the conduction intervals of the bilateral switching elements are shifted with respect to a selected time reference to vary the input displacement factor, or input power factor, of the frequency changer system.

Abstract translation: 本发明涉及一种包括双向开关元件的变频器系统的操作，其中双向开关元件的导通间隔相对于所选择的时间基准偏移，以改变频率的输入位移因子或输入功率因数 更换系统。

公开(公告)号：US3444451A

公开(公告)日：1969-05-13

申请号：US3444451D

申请日：1966-08-26

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： SCHLABACH LELAND A ,  GYUGYI LASZLO

IPC: H02M7/515 ,  H02M7/525 ,  H02P27/06 ,  H02P7/62

CPC classification number: H02P27/06 ,  H02M7/5152 ,  H02M7/525 ,  H02P27/047

公开(公告)号：US3641417A

公开(公告)日：1972-02-08

申请号：US3641417D

申请日：1970-09-15

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： GYUGYI LASZLO

IPC: H02M1/12 ,  H02M5/27 ,  H02M5/30

CPC classification number: H02M5/271 ,  H02M1/12

Abstract: The invention relates to an electrical filter circuit operatively coupled between the output of a polyphase power source exhibiting measurable impedance and the inputs of a cycloconverter apparatus; the filtering circuit including coupled inductors connected between phases of the power source to shunt the unwanted frequency components generated by the cycloconverter apparatus in order to decrease the distortion of the terminal voltage of the polyphase power source, and to improve the input power factor of the cycloconverter.

Abstract translation: 本发明涉及可操作地耦合在具有可测量阻抗的多相电源的输出与循环换流器装置的输入之间的电气滤波器电路; 滤波电路包括连接在电源的相位之间的耦合电感器，以分流由循环换流器装置产生的不需要的频率分量，以便减少多相电源的端电压的失真，并改善循环换流器的输入功率因数 。

公开(公告)号：US3585489A

公开(公告)日：1971-06-15

申请号：US3585489D

申请日：1969-06-20

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： PELLY BRIAN R ,  GYUGYI LASZLO

IPC: H02M5/27 ,  H02M5/22

CPC classification number: H02M5/271

Abstract: The invention comprises a low-power variable frequency AC generator with inherently controllable output voltage means and inherent phase reversal capabilities. The AC generator includes switching circuits which are controlled by the output pulses of an adjustable frequency pulse generator to establish the period within which each phase of a polyphase voltage source is in conduction. Additional control circuitry is provided to subdivide the period allotted for each phase conduction into a conduction and nonconduction subperiods to thereby control the amplitude of the output voltage waveform. The adjustable frequency pulse generator is controlled by a DC voltage and the frequency of the output pulses is proportional to this voltage.

公开(公告)号：US3876888A

公开(公告)日：1975-04-08

申请号：US34164273

申请日：1973-03-15

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： GYUGYI LASZLO ,  STACEY ERIC J

IPC: H02M1/08 ,  H02M5/27 ,  H03K4/02 ,  H03K5/00

CPC classification number: H03K4/026

Abstract: An operational amplifier is used to synthesize a sine wave from a plurality of phase displaced rectangular waveforms of magnitude selected for minimum distortion. The rectangular waveforms are applied to the inverting (summing) input terminal of the operational amplifier while the non-inverting input terminal is maintained at a direct voltage resulting in an output of the synthesized rectangular waveforms that is symmetrical about the voltage level of the non-inverting input terminal. Application of this waveform to a simple first order filter, such as an integrator provided by a feedback network on the same opamp, results in a smooth sine wave of high precision suitable for various applications such as in cycloconverters.

公开(公告)号：US3875494A

公开(公告)日：1975-04-01

申请号：US38032973

申请日：1973-07-18

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： GYUGYI LASZLO

IPC: H02M7/48

CPC classification number: H02M7/48 ,  Y10T307/707

Abstract: Direct current (DC) power is converted to alternating current (AC) power by a series combination of first DC to AC converter (inverter) and a cycloconverter connected in parallel with a second DC to AC converter (inverter). All three of the converters are naturally commutated. A commutation voltage for both the cycloconverter and the first inverter is provided by a reactive power source. To augment operation for some uses, the output of the cycloconverter is connected to an inductor, and the AC side of the first inverter is connected to neutral by a capacitor. The cycloconverter is controlled to maintain a near unity power factor.

Abstract translation: 通过第一直流 - 交流变换器（逆变器）的串联组合和与第二直流 - 交流变换器（逆变器）并联连接的循环变频器将直流（DC）功率转换成交流（AC）功率。 所有三个转换器都是自然换向的。 循环换流器和第一反相器的换向电压由无功电源提供。 为了增加一些用途的操作，循环换流器的输出连接到电感器，并且第一反相器的AC侧由电容器连接到空档。 控制循环换流器以保持近乎一致的功率因数。

公开(公告)号：US3526789A

公开(公告)日：1970-09-01

申请号：US3526789D

申请日：1967-11-29

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： GYUGYI LASZLO ,  PELLY BRIAN R ,  ROSA JOHN

IPC: H02M1/084 ,  H02M7/162 ,  H03K23/84 ,  H03K1/12

CPC classification number: H02M7/1623 ,  H03K23/84

公开(公告)号：US3707667A

公开(公告)日：1972-12-26

申请号：US3707667D

申请日：1971-11-12

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： GYUGYI LASZLO

IPC: H02M5/27 ,  H02M5/22

CPC classification number: H02M5/271

Abstract: The invention relates to a frequency changer (or cycloconverter) system employing conduction controlled bilateral switches operating in a controlled switching mode to maintain a unity input displacement factor for the frequency changer system independent of load power factor and output voltage. The input displacement factor, which is often referred to as the input power factor, of the frequency changer system is defined to be the angle between the input, or source, voltage and the fundamental component of the input current drawn by the frequency changer system.

Abstract translation: 本发明涉及一种变频器（或循环换流器）系统，其采用以受控切换模式工作的导通控制双向开关，以保持与负载功率因数和输出电压无关的变频器系统的单位输入位移系数。 变频器系统的输入位移系数（通常被称为输入功率因数）定义为变频器系统输入或输入电压与输入电流的基波分量之间的角度。

公开(公告)号：US3707666A

公开(公告)日：1972-12-26

申请号：US3707666D

申请日：1971-11-12

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： GYUGYI LASZLO

IPC: H02M5/27 ,  H02M5/22

CPC classification number: H02M5/271

Abstract: The invention relates to a frequency changer (or cycloconverter) system employing conduction controlled bilateral switches operating in a controlled switching mode to maintain a unity input displacement factor for the frequency changer system independent of load power factor and output voltage. The input displacement factor, which is often referred to as the input power factor, of the frequency changer system is defined to be the angle between the input, or source, voltage and the fundamental component of the input current drawn by the frequency changer system.

公开(公告)号：US3585486A

公开(公告)日：1971-06-15

申请号：US3585486D

申请日：1969-06-20

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： GYUGYI LASZLO ,  PELLY BRIAN R

IPC: H02M5/27 ,  H02M5/14 ,  H02M5/30

CPC classification number: H02M5/271

Abstract: A converter system utilizing a control converter operated during both the positive and negative current half cycles of the output voltage to initiate firing pulses for a power converter which can be operated in either a noncirculating current mode or a circulating current mode.