公开(公告)号：US4390938A

公开(公告)日：1983-06-28

申请号：US272597

申请日：1981-06-11

申请人： Eric J. Stacey

发明人： Eric J. Stacey

IPC分类号： H02M5/27 ,  H02M1/08

CPC分类号： H02M5/272

摘要： In power conversion apparatus such as a naturally commutated cycloconverter for use in converting the output of a variable speed generator to a constant frequency, there is provided an end stop control circuit for ensuring commutation of power switching devices that includes timing wave generators for both rectification and inversion end stops. The timing wave generators are phase locked with the generator outputs but are controllable by end stop bias signal derived from a variable system parameter that may be independent of the source, such as load current to provide prompt protection against converter malfunctions due to excess load currents.Further provided is an excess current detector employing, for each phase, a pair of high slew rate, high current unipolar output op amps connected in a voltage follower configuration with a common pull-up resistor and a common load capacitor to develop a peak current signal representing the greater of the positive and negative peaks of the alternating phase current.

公开(公告)号：US4317975A

公开(公告)日：1982-03-02

申请号：US972881

申请日：1978-12-26

申请人： Takumi Mizukawa ,  Keizo Amagami ,  Mitsuyuki Kiuchi ,  Hirokazu Yoshida ,  Tatsuo Saka

发明人： Takumi Mizukawa ,  Keizo Amagami ,  Mitsuyuki Kiuchi ,  Hirokazu Yoshida ,  Tatsuo Saka

IPC分类号： H05B6/12 ,  G05F1/45 ,  H02M1/08 ,  H02M5/27 ,  H05B6/06 ,  H05B6/08

CPC分类号： H05B6/062 ,  G05F1/45 ,  H02M1/08 ,  H02M5/27

摘要： Induction heating apparatus using gate-controlled switching devices includes a zero crossing point detector for detecting the occurrence of each zero crossing point of high frequency energization current, and a timing circuit which provides timing action in response to the detected zero crossing point. The timing action is controlled by a power control circuit which detects the level of energy delivered to a load within a range from the inherent turn-off time of the gate-controlled switching devices to a desired value.

摘要翻译： 使用栅极控制开关器件的感应加热装置包括用于检测高频通电电流的每个过零点的出现的过零点检测器，以及响应于检测到的过零点提供定时动作的定时电路。 定时动作由功率控制电路控制，功率控制电路检测在从门控开关装置的固有关断时间到期望值的范围内传送到负载的能量的水平。

公开(公告)号：US4314321A

公开(公告)日：1982-02-02

申请号：US143554

申请日：1980-04-25

申请人： Josef Galliker

发明人： Josef Galliker

IPC分类号： H02M5/27 ,  H02M5/00

CPC分类号： H02M5/271

摘要： An ozonizer power feeding device comprising a multiphase power source having at least one terminal for each phase, a thyristor circuit coupled to the terminals of the power source and including at least two thyristors for each phase connected at one side thereof in an anti-parallel configuration to a respective terminal of the source, a transformer having at least one primary coil coupled to the other sides of the anti-parallel connected thyristors and a secondary coil adapted to be connected to an ozonizer for feeding power to the ozonizer, and a joint control unit coupled to each of the thyristors for controlling the conduction time thereof in dependence on the waveforms provided at the terminals of the source in order to derive a composite waveform applied to the transformer primary, wherein the composite waveform has a high frequency than that of any of the phases of the power source, thereby increasing ozone production which is proportional to the frequency of the applied power.

摘要翻译： 一种臭氧发生器供电装置，包括具有每相的至少一个端子的多相电源，晶闸管电路，其耦合到所述电源的端子，并且包括至少两个晶闸管，用于在其一侧以反并联配置连接的每相 到源极的相应端子，具有耦合到反并联连接晶闸管的另一侧的至少一个初级线圈的变压器和适于连接到用于向臭氧发生器供电的臭氧发生器的次级线圈，以及联合控制 耦合到每个晶闸管的单元，用于根据提供在源的端子处的波形来控制其导通时间，以便导出施加到变压器初级的复合波形，其中复合波形的频率高于任何 的电源的相位，从而增加与施加的功率的频率成比例的臭氧产生。

公开(公告)号：US4310791A

公开(公告)日：1982-01-12

申请号：US141214

申请日：1980-04-17

申请人： Masahiko Akamatsu

发明人： Masahiko Akamatsu

IPC分类号： H02P21/00 ,  H02M5/27 ,  H02P23/08 ,  H02P27/04 ,  H02P27/06 ,  H02P5/34 ,  H02P7/42

CPC分类号： H02P23/08

摘要： A variable frequency power supply device supplies an AC power to a squirrel-cage motor through an AC parameter control. The control receives a command active current resulting from a command torque and a command exciting current to generate a resultant current and its phase. The command torque is produced from the actual and command motor speeds and the exciting current is caused from the actual motor speed. The control also receives a command frequency determined by the actual motor frequency and a command slip frequency also resulting from the command torque. The control controls the firing phases of thyristors in the power supply device in response to the command current, phase and frequency. The control may generate a voltage for supplying the active current and an exciting voltage to similarly control the firing phases of the thyristors. In the latter case, the exciting voltage may be added with its differential to compensate for a rapid change in active current.

摘要翻译： 变频电源装置通过AC参数控制向鼠笼式电动机提供交流电力。 该控制接收由指令转矩和指令激励电流产生的指令有效电流以产生合成电流及其相位。 指令转矩由实际和指令电机转速产生，励磁电流由实际电机转速引起。 该控制还接收由实际电动机频率确定的指令频率和由指令转矩产生的指令滑差频率。 该控制器响应于指令电流，相位和频率控制电源装置中的晶闸管的点火阶段。 控制可以产生用于提供有功电流的电压和激励电压以类似地控制晶闸管的点火相位。 在后一种情况下，激励电压可以加上其差分以补偿有功电流的快速变化。

公开(公告)号：US4295190A

公开(公告)日：1981-10-13

申请号：US95899

申请日：1979-11-19

申请人： Eric J. Stacey ,  Donal E. Baker

发明人： Eric J. Stacey ,  Donal E. Baker

IPC分类号： H02M5/27

CPC分类号： H02M5/271

摘要： Firing pulses to the thyristors in the nonload carrying bank of a naturally commutated power circuit of a static power converter are inhibited only after the current therethrough actually goes to zero. Where the thyristors are arranged in pulse groups, the firing pulses to each group are inhibited separately and in some instances not all groups in the nonload carrying bank are inhibited. Termination of current flow through a thyristor group is determined by comparing the group output voltage with a composite signal representative of the intended group voltage which is generated by summing selected portions of the source voltages applied to the group. Further firing of the thyristors in the group is inhibited only after the difference between these two signals exceeds a preset threshold value for an interval at least equal in duration to the thyristor reverse recovery time.

摘要翻译： 静态功率转换器的自然换向电源电路的无负载组中的晶闸管的发射脉冲仅在其中的电流实际上变为零之后才被抑制。 在晶闸管以脉冲组布置的情况下，对每组的点火脉冲被分开地禁止，并且在某些情况下不能阻止非负载组中的所有组。 通过将组输出电压与表示通过对施加到组施加的源电压的选定部分进行求和而产生的预期组电压的复合信号进行比较来确定通过晶闸管组的电流的终止。 只有在这两个信号之间的差异超过预设的阈值以至于与晶闸管反向恢复时间至少相等的间隔时，该组中的晶闸管的进一步点火被抑制。

公开(公告)号：US4281371A

公开(公告)日：1981-07-28

申请号：US127601

申请日：1980-03-05

申请人： Donal E. Baker

发明人： Donal E. Baker

IPC分类号： G05F1/10 ,  H02M5/27 ,  H02P13/30

CPC分类号： H02M5/271

摘要： The quality of the output waveform of a cycloconverter is greatly improved by a feedback loop that compensates for the inherent nonlinearity of the converter forward gain. A feedback signal, preferably proportional to the current through the shunt capacitor of the converter output filter, is multiplied by a compensating signal generated by full wave rectification of the cycloconverter AC reference signal with the resultant signal summed in opposition with the reference signal before it is applied to the converter control circuit. Alternatively a more precise compensating signal can be generated through 90.degree. phase shifting and negative going full wave rectification of the sinusoidal cycloconverter reference signal.

摘要翻译： 通过补偿转换器正向增益的固有非线性的反馈环路，可以大大提高循环变频器输出波形的质量。 与通过转换器输出滤波器的并联电容器的电流成比例的反馈信号乘以由循环转换器AC参考信号的全波整流产生的补偿信号，其中所得到的信号在参考信号之前与参考信号相反， 应用于转换器控制电路。 或者，可以通过正弦循环变换器参考信号的90°相移和负全波整流产生更精确的补偿信号。

公开(公告)号：US4211912A

公开(公告)日：1980-07-08

申请号：US927649

申请日：1978-07-24

申请人： Mitsuyuki Kiuchi ,  Shigeo Hamaoka

发明人： Mitsuyuki Kiuchi ,  Shigeo Hamaoka

IPC分类号： H03B19/00 ,  H02M5/27 ,  H05B6/06 ,  H05B5/04

CPC分类号： H05B6/062 ,  H02M5/27

摘要： An induction heating apparatus includes a pair of thyristors inversely parallel connected to receive power from a low frequency energy source, a commutating circuit and a gating control circuit for supplying control pulses to the thyristors to produce a forward halfwave current through the commutating circuit which in return produces a backward commutating current to the thyristors. The gating control circuit includes a pulse transformer having a pair of secondary windings connected to the thyristors and a primary winding responsive to control pulses supplied from a pulse generator to produce a positive gating pulse in each of the secondary windings to drive one of the thyristors into conduction depending on the polarity of the source voltage to produce the forward current. The control pulse has a longer duration than the maximum duration of the forward halfwave current so that upon cessation of the forward current the other thyristor is gated into conduction to allow the backward commutating current to pass therethrough to complete an oscillation cycle. A counterelectromotive force is generated in the secondary windings in response to the trailing edge of the positive gating pulse to negatively bias the thyristor to quickly turn it off.

摘要翻译： 感应加热装置包括一对可逆并联连接以从低频能源接收功率的晶闸管，换向电路和选通控制电路，用于向晶闸管提供控制脉冲以产生通过换向电路的正向半波电流 产生向晶闸管的反向换向电流。 选通控制电路包括具有连接到晶闸管的一对次级绕组的脉冲变压器和响应于从脉冲发生器提供的控制脉冲以在每个次级绕组中产生正门控脉冲的初级绕组，以驱动其中一个晶闸管 导通取决于源电压的极性产生正向电流。 控制脉冲具有比正向半波电流的最大持续时间更长的持续时间，使得在正向电流停止时，另一晶闸管选通导通，以允许反向换向电流通过其中以完成振荡周期。 响应于正门控脉冲的后沿在次级绕组中产生反电动势，以对晶闸管负偏置以快速将其关闭。

公开(公告)号：US4162522A

公开(公告)日：1979-07-24

申请号：US849916

申请日：1977-11-09

申请人： Nathan A. Moerman

发明人： Nathan A. Moerman

IPC分类号： G05F1/38 ,  H01F29/14 ,  H01F38/02 ,  H02M5/27 ,  H02M5/16

CPC分类号： H01F38/02 ,  G05F1/38 ,  H01F29/14 ,  H02M5/27 ,  H01F2029/143 ,  H01F2038/026

摘要： Apparatus for conversion of alternating current at a first frequency to alternating current at a second (lower) frequency in a power control circuit by means of progressive variation of magnetic flux in associated magnetic paths. Control is achieved by progressive saturation or domain rotation for selected portions of the magnetic paths to yield a uniformly controllable permeance within the magnetic paths. Feedback circuits provide a means for external control of the output in combination with a reference source.

摘要翻译： 用于在功率控制电路中通过相关磁路中的磁通量的逐渐变化将第一频率的交流电转换为第二（较低）频率的交流电的装置。 通过对磁路的选定部分的逐渐饱和或域旋转实现控制，以在磁路内产生均匀可控的磁导。 反馈电路提供了与参考源组合的输出的外部控制的手段。

公开(公告)号：US4147910A

公开(公告)日：1979-04-03

申请号：US803968

申请日：1977-06-06

申请人： Mitsuyuki Kiuchi ,  Takumi Mizukawa ,  Keizo Amagami ,  Hirokazu Yoshida

发明人： Mitsuyuki Kiuchi ,  Takumi Mizukawa ,  Keizo Amagami ,  Hirokazu Yoshida

IPC分类号： H02M5/27 ,  G05F1/455 ,  H05B5/04

CPC分类号： G05F1/455

摘要： In an induction heating cooking apparatus, the frequency of electromagnetic energy is varied in response to a desired power setting level within an allowable range and the duty cycle of the energy is varied in response to the setting level while the frequency is set at the lower limit of the allowable range. The combined effects of frequency and duty cycle controls permit the power to vary from as low as 50 watts to as high as 2 kilowatts.

摘要翻译： 在感应加热烹调设备中，电磁能的频率响应期望的功率设定水平而变化，并且能量的占空比响应设定水平而变化，而频率设定在下限 的允许范围。 频率和占空比控制的综合影响允许功率从低至50瓦特变化到高达2千瓦。

公开(公告)号：US4074348A

公开(公告)日：1978-02-14

申请号：US663131

申请日：1976-03-02

申请人： Theodor Salzmann ,  Wolfgang Timpe ,  Manfred Weibelzahl

发明人： Theodor Salzmann ,  Wolfgang Timpe ,  Manfred Weibelzahl

IPC分类号： H02M5/27

CPC分类号： H02M5/271

摘要： A circuit arrangement is disclosed comprising a converter for converting a three-phase system of sinusoidal voltages into three trapezoidal control voltages for controlling control units serving three direct cycloconverters. More particularly, in accord with the invention, the converter acts on the sinusoidal control voltages such that during each region from .pi./3 to 2.pi./3 of a half-wave of each particular voltage that voltage is reduced to .sqroot.3/2 times its peak value, while the other two voltages are amplified or increased by an amount equal to the difference between the aforesaid peak value and .sqroot.3/2 times such peak value.