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公开(公告)号：US3707667A
公开(公告)日：1972-12-26
申请号：US3707667D
申请日：1971-11-12
发明人： GYUGYI LASZLO
CPC分类号： H02M5/271
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US3707666A
公开(公告)日：1972-12-26
申请号：US3707666D
申请日：1971-11-12
发明人： GYUGYI LASZLO
CPC分类号： H02M5/271
摘要： 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.
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53.发明授权Polyphase alternating current frequency variator for induction and synchronous type motor 失效用于感应和同步型电动机的多相交替电流变频器
公开(公告)号：US3665273A
公开(公告)日：1972-05-23
申请号：US3665273D
申请日：1969-08-11
摘要： A frequency variator for controlling the speed of polyphase alternating current induction and synchronous type motors. The frequency of the A.C. power supply to the motor is varied by controlling the firing of power control gates in series with the motor windings in an ordered sequence.
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公开(公告)号：US3659168A
公开(公告)日：1972-04-25
申请号：US3659168D
申请日：1971-02-22
申请人： GEN MOTORS CORP
发明人： SALIHI JALAL T , SHIMER DANIEL W
CPC分类号： H02M7/525 , B60L11/00 , B60L2220/12 , H02M5/271 , H02P23/08 , Y02T10/646 , Y02T10/648
摘要： In this system, a controlled rectifier converter interconnects an alternating current voltage source with an AC induction motor. To effect voltage amplitude control, trigger signals are pulsed to the various controlled rectifiers of the converter during their respective 120* conductive intervals. The resultant duty cycle modulation affords control of the level of the voltage applied to the induction motor. At low frequencies, a plurality of power pulses are provided by the converter during each 60* of conduction, whereas at high frequencies, a single power pulse is supplied for each 60* of conduction. A smooth transition is provided between these two operating modes to ensure smooth, continuous motor control and operation throughout the operating range of the motor. This smooth transition is facilitated by synchronizing the power pulses in relation to the two 60* increments comprising the 120* conductive intervals for the respective controlled rectifiers.
摘要翻译： 在该系统中，受控整流器转换器将交流电压源与AC感应电动机互连。 为了实现电压幅度控制，触发信号在其各自的120°导通间隔期间被脉冲输送到转换器的各个可控整流器。 所得的占空比调制提供对施加到感应电动机的电压的电平的控制。 在低频时，在每个60°的导通期间，转换器提供多个功率脉冲，而在高频时，为每个60°的导通提供单个功率脉冲。 在这两种运行模式之间提供平滑过渡，以确保电动机整个运行范围内平稳，连续的电机控制和运行。 通过将功率脉冲相对于包含相应受控整流器的120°导通间隔的两个60°增量相互协调来实现平滑过渡。
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公开(公告)号：US3611087A
公开(公告)日：1971-10-05
申请号：US3611087D
申请日：1970-05-12
CPC分类号： H02M5/27
摘要： As is well known, a six-phase thyristor circuit of a so-called cycloconverter provided with 36 thyristors allows an output frequency at the order of 15 to 20 c.p.s. to be produced with the network frequency being equal to 60 c.p.s. A frequency-controlled AC drive of the invention is based on the use of modulation apparatus of nonreversible magnetic amplifiers with an output of second harmonics and diodes, which simultaneously perform functions of demodulators and internal feedback tubes. Thyristors are employed for varying the direction of current in the windings of the motors. For a three-phase motor provided with six-phase magnetic amplifiers, there are required in total 6 thyristors and 36 noncontrolled diodes. Thus an output frequency is obtained ranging from 0 to 90 percent of the network frequency. Hence, at a frequency of 60 c.p.s. it is possible to achieve a gradual variation in frequency from 0 to 50-55 c.p.s. Efficiency of the modulators based on double magnetic amplifiers attains even with low powers a value of the order of 80 percent. Even with low frequencies and voltages, the output voltage will approximate a sinusoidal one. The present invention may be used at increased network frequencies of the order of 400 to 500 c.p.s. for driving induction and synchronous alternating current motors of an increased rotation speed.
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公开(公告)号：US3588668A
公开(公告)日：1971-06-28
申请号：US3588668D
申请日：1968-08-16
申请人： FRANCOIS COVA
发明人： COVA FRANCOIS
CPC分类号： H02M5/271
摘要： A BLOCKING DEVICE PREVENTS THE SIMULTANEOUS OPERATION OF TWO RECTIFYING GROUPS OF THE CYCLOCONVERTER. A PILOT DEVICE FURNISHES FROM A POLYPHASE SUPPLY NETWORK A PILOT NETWORK WHICH IS PREFECTLY IN PHASE WITH THE SUPPLY NETWORK. A LOGIC CONTACT DEVICE DELIVERS TO THE CONTROL ELECTRODES OF THE THYRISTORS OF EACH RECTIFYING GROUP WHICH MUST BE CONDUCTIVE PULSES THROUGHOUT THE CONDUCTION TIME THIS OR EACH OF THE RECTIFYING GROUPS.
摘要翻译： 阻塞装置防止同步操作循环换流器的两个整流组。 导频设备从多相电源网络提供与供电网络完全同步的导频网络。 逻辑接触装置传送到每个整流组的晶闸管的控制电极，在该整流组或每个整流组的整个导通时间内必须是导通脉冲。
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57.发明授权An electrical converter system employing a control converter for controlling the operation of a power converter 失效使用控制转换器控制电源转换器运行的电气转换器系统
公开(公告)号：US3585486A
公开(公告)日：1971-06-15
申请号：US3585486D
申请日：1969-06-20
发明人： GYUGYI LASZLO , PELLY BRIAN R
CPC分类号： H02M5/271
摘要： 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.
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公开(公告)号：US3585485A
公开(公告)日：1971-06-15
申请号：US3585485D
申请日：1969-06-20
发明人： GYUGYI LASZLO , ROSA JOHN , PELLY BRIAN R
CPC分类号： H02M5/271
摘要： An improved method of firing angle control of thyristor type converters and particularly cycloconverters each of the component waveforms of the converter as well as the composite output waveform of the converter are summed with a reference waveform and the difference resulting from each of the summations is integrated. The firing angles of the thyristors are established when a predetermined relationship exists between the integral corresponding to the composite output waveform and the integrals corresponding to the component waveforms. A system of control is employed wherein the firing points are determined as a function of the integral of the converter output waveform.
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公开(公告)号：US3568033A
公开(公告)日：1971-03-02
申请号：US3568033D
申请日：1969-10-06
发明人： GYUGYI LASZLO
CPC分类号： H02M5/271
摘要： Invention comprises apparatus and method for controlling the transfer of conduction between positive and negative banks of a cycloconverter circuit relative to the zero crossover point of the fundamental component of the AC output current waveform of the cycloconverter to insure a continuous cycloconverter current.
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60.发明授权
公开(公告)号：US3546562A
公开(公告)日：1970-12-08
申请号：US3546562D
申请日：1968-06-17
发明人： HAVAS GEORGE , DEWAN SHASHI BHUSHAN
CPC分类号： H02M5/271
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