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公开(公告)号：US4129788A
公开(公告)日：1978-12-12
申请号：US790976
申请日：1977-04-26
CPC分类号： H02M3/33561 , Y10T307/25 , Y10T307/593
摘要： A DC to DC converter has an unregulated input and provides a pair of regulated outputs which independently provide variable power on demand to two independent loads at a substantially constant output voltage. The converter includes three major sections, the input oscillator and pulse width modulation section, the isolated negative DC regulator and the isolated positive DC regulator. Each of the DC regulators is current limited and each is provided with overvoltage protection. One of the output regulators provides improved efficiency through the use of a pair of appropriately connected catch diodes which decrease current change through a filtering inductor, and through implementation of a combined regulator preload resistor and AC pulse width modulating switching transistor drive current source. The converter is a compact modular unit having a low profile with circuit components arranged to minimize temperature instability.
摘要翻译： DC-DC转换器具有未调节的输入，并提供一对稳压输出，它们在基本上恒定的输出电压下独立地向两个独立负载提供可变功率。 该转换器包括三个主要部分：输入振荡器和脉冲宽度调制部分，隔离负DC调节器和隔离正DC调节器。 每个DC稳压器都是电流限制的，每个都有过压保护。 其中一个输出稳压器通过使用一对适当连接的捕捉二极管来提高效率，捕获二极管通过滤波电感降低电流变化，并通过实现组合调节器预负载电阻和交流脉宽调制开关晶体管驱动电流源。 该转换器是具有低轮廓的紧凑的模块化单元，其中电路部件布置成使温度不稳定性最小化。
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公开(公告)号：US4771373A
公开(公告)日：1988-09-13
申请号：US71693
申请日：1987-07-09
申请人： Gerrit Rademaker
发明人： Gerrit Rademaker
CPC分类号： H02M7/2176
摘要： A supply circuit for supplying a smoothed direct current to a load comprises a series FET element in series with the load resistance. The supply circuit is fed from the AC supply network via a rectifier 54 and a smoothing capacitor 52 causing a ripple voltage to be present on the input terminals 2-1 and 2-2. The direct voltage component of the input voltage is present across load resistance 60 and the alternating voltage component of the input voltage is present across transistor 10. In the case of known supply voltage circuits the voltage drop across the series element is selected to be equal to the maximum peak-to-peak value of the alternating voltage component thereby causing unnecessary power dissipation to be developed at a minor ripple amplitude. This will cause rapid ageing of the series element. The supply circuit in accordance with the invention comprises a comparator 42 comparing the voltage across FET transistor 10 to a threshold voltage. Comparator 42 controls the charge on the filter capacitors 30 and 32. Consequently, the overall voltage across transistor 10 will never exceed the sum of the threshold voltage and the peak-to-peak voltage of the alternating voltage component of the input voltage.
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13.发明授权Method and apparatus for generating a control power delivered to a load by a polyphase power line 失效用于产生由多相电力线传送到负载的控制功率的方法和装置
公开(公告)号：US4670831A
公开(公告)日：1987-06-02
申请号：US756621
申请日：1985-07-19
CPC分类号： H02M7/1623 , H02P7/293
摘要： A microprocessor determines the zero cross-over times and direction of the phase voltages of the AC power line; a multiplexer has three parallel inputs which are respectively connected to the three phase conductors of the line and an output delivering a voltage formed by successive portions of the phase voltages; a flip-flop sensitive to the change of sign is connected to the output of the multiplexer; and EXCLUSIVE OR gate has an input connected to the output of the flip-flop and an other input to an output of the processor; and a NAND gate has an input connected to the output of the EXCLUSIVE OR gate and another input which receives a signal formed of a succession of square waves forming enabling windows.
摘要翻译： 微处理器确定交流电源线的相电压的零交叉时间和方向; 多路复用器具有分别连接到该线路的三相导线的三个并行输入端和一个输出由相电压的连续部分形成的电压的输出端; 对符号变化敏感的触发器连接到多路复用器的输出; 并且EXCLUSIVE或门具有连接到触发器的输出的输入端和与处理器的输出端的另一输入端; 并且NAND门具有连接到EXCLUSIVE OR门的输出的输入端和接收由形成启用窗口的一系列方波形成的信号的另一输入端。
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公开(公告)号：US4667281A
公开(公告)日：1987-05-19
申请号：US798264
申请日：1985-11-15
申请人： John Lindquist , Dahya Patel
发明人： John Lindquist , Dahya Patel
CPC分类号： H02M3/1563
摘要： A circuit is provided to speed up switching of a capacitively coupled power transistor driven with a signal provided from a pulse width modulator. The speed-up circuit is provided across a buffer amplifier which is in series circuit between the pulse width modulator and the coupling capacitor. The speed-up circuit includes a time delay circuit which is activated when the output of the amplifier goes low. The delay circuit is coupled to actuate a clamp circuit at a predetermined interval after activation. The clamp circuit is connected to the input of the amplifier and, upon actuation, pulls up the voltage at the input of the amplifier so that it is at a level intermediate the extreme values of the pulse width modulator output signal. In a preferred embodiment the timer is a series RC charging circuit and the clamp is a transistor with its base connected to the junction between the capacitor and the resistor. The collector of the transistor is coupled to the input of the amplifier and its emitter is connected to a voltage source through a zener diode.
摘要翻译： 提供电路以加速由脉宽调制器提供的信号驱动的电容耦合功率晶体管的开关。 加速电路设置在缓冲放大器之间，缓冲放大器是脉冲宽度调制器和耦合电容器之间的串联电路。 加速电路包括延时电路，当放大器的输出变为低电平时，该电路被激活。 延迟电路被联接以在激活之后以预定间隔致动钳位电路。 钳位电路连接到放大器的输入，并且在致动时，将放大器输入端的电压拉高，使其处于脉宽调制器输出信号的极值之上的水平。 在优选实施例中，定时器是串联RC充电电路，并且钳位器是其基极连接到电容器和电阻器之间的结的晶体管。 晶体管的集电极耦合到放大器的输入端，其发射极通过齐纳二极管连接到电压源。
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公开(公告)号：US4652987A
公开(公告)日：1987-03-24
申请号：US809988
申请日：1985-12-17
CPC分类号： H02M3/1563
摘要： A regulator for compensating for the IR drop of a rectifier coupled between the secondary winding of a transformer and a load circuit includes a pass transistor connected between the load circuit and the rectifier. A DC reference voltage is developed by a circuit connected across the secondary winding that is not subject to current fluctuations. A differential amplifier is supplied with the reference voltage as one input and the load voltage as another input. The output of the differential amplifier controls the conductivity of the pass transistor. A current limiting transistor is included in the base circuit of the pass transistor and, in turn, is controlled by another differential amplifier supplied with potentials representative of the IR drop across the rectifier. A shut down transistor is provided for cutting of the pass transistor in the event the load circuit voltage drops below a predetermined level.
摘要翻译： 用于补偿耦合在变压器的次级绕组和负载电路之间的整流器的IR降低的调节器包括连接在负载电路和整流器之间的通过晶体管。 直流参考电压由连接在次级绕组上的电路产生，不受电流波动的影响。 差分放大器的参考电压作为一个输入，负载电压作为另一个输入。 差分放大器的输出控制传输晶体管的电导率。 限流晶体管包括在传输晶体管的基极电路中，并且由另一差分放大器控制，该差分放大器提供表示整流器上的IR降的电势。 在负载电路电压低于预定电平的情况下，提供关断晶体管用于切断传输晶体管。
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公开(公告)号：US4347562A
公开(公告)日：1982-08-31
申请号：US161896
申请日：1980-06-23
申请人： James H. Galloway
发明人： James H. Galloway
CPC分类号： H02M7/1626 , H02M1/0845
摘要： A trigger system and method for use in a line commutated power converter as used in either a rectification or an inversion mode of operation and more particularly a trigger system and method for a static converter for accurately controlling the firing angles for controlled rectifiers for converting between multiphase a-c power and d-c power by use of digital signal having magnitudes which are varied for varying firing angles for providing a converted output having a regulated voltage and/or current.
摘要翻译： 一种用于线性换向功率转换器的触发系统和方法，其用于整流或反相操作模式，更具体地涉及一种用于精确控制受控整流器的触发角度的触发系统和方法，用于在多相 通过使用具有为改变触发角度而变化的量值的数字信号提供具有调节电压和/或电流的转换输出的交流电力和直流电力。
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公开(公告)号：US4323960A
公开(公告)日：1982-04-06
申请号：US174004
申请日：1980-07-31
申请人： Lee J. Jones
发明人： Lee J. Jones
CPC分类号： H02M1/4208 , H02M1/10 , H02M3/156 , Y02B70/126
摘要： The disclosed dual mode direct current power supply comprises an AC transformer, a pair of DC output terminals, and first and second rectifier-filter circuits connected in parallel between the transformer and such terminals; the first circuit comprising first rectifiers for producing first rectified pulses, a first capacitor adapted to be charged to the peak voltage of such pulses, and an electronic voltage regulator including a series transistor; the second rectifier-filter circuit including second rectifiers for producing second rectified pulses, a choke input filter including an inductance and a second capacitor adapted to be charged through the inductance to the average voltage of the second pulses, and a series diode; the regulator causing the transistor to be nonconductive at high DC output voltage and then conductive increasingly in response to decreasing output voltage whereby the first rectifier-filter circuit supplies an increasing share of the load current.
摘要翻译： 所公开的双模式直流电源包括AC变压器，一对DC输出端子以及并联在变压器与这种端子之间的第一和第二整流滤波器电路; 所述第一电路包括用于产生第一整流脉冲的第一整流器，适于被充电到所述脉冲的峰值电压的第一电容器和包括串联晶体管的电子电压调节器; 所述第二整流滤波电路包括用于产生第二整流脉冲的第二整流器，包括电感的扼流圈输入滤波器和适于通过所述电感充电至所述第二脉冲的平均电压的第二电容器和串联二极管; 调节器使得晶体管在高直流输出电压下不导通，然后响应于输出电压的降低而越来越多地导通，由此第一整流器滤波器电路提供负载电流的增加份额。
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公开(公告)号：US4276591A
公开(公告)日：1981-06-30
申请号：US043518
申请日：1979-05-29
申请人： Donald L. Quick
发明人： Donald L. Quick
CPC分类号： G05F1/38
摘要： A high power D.C. supply regulated for constant output power to be dissipated in varying loads such as encountered in cathode sputtering systems. A.C. input power is rectified to produce the desired D.C. The output D.C. voltage and load current are measured and a voltage signal proportional to their product is compared with a D.C. input control signal. The comparator "error" output signal controls a pass element that varies a D.C. current through saturable reactors in the A.C. input power lines to regulate the D.C. power into the load. The supply includes a limiting feature that is adjustable to a desired threshold level for limiting D.C. output power, voltage, and/or current so that the limiter will take control from the comparator to hold the supply output at a safe level.
摘要翻译： 用于稳定输出功率的高功率直流电源可以在诸如阴极溅射系统中遇到的变化负载中消散。 A.C.输入功率整流以产生所需的直流电。测量输出直流电压和负载电流，并将与其产品成比例的电压信号与直流输入控制信号进行比较。 比较器“误差”输出信号控制通过元件，其通过交流输入电力线中的可饱和电抗器改变直流电流，以调节负载中的直流电。 电源包括可调节到期望阈值电平以限制直流输出功率，电压和/或电流的限制特征，使得限制器将从比较器进行控制以将电源输出保持在安全水平。
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公开(公告)号：US4249236A
公开(公告)日：1981-02-03
申请号：US72317
申请日：1979-09-04
申请人： Tsutomu Omae , Tosihiko Matuta
发明人： Tsutomu Omae , Tosihiko Matuta
CPC分类号： H02M7/1626 , Y10S388/902
摘要： The firing phase of the power converter which can change power to be supplied to a load is determined by the firing angle instruction produced from the current control circuit in accordance with the magnitude of the current difference between the current target value and the current actual value flowing through the load. The nonlinear compensating circuit produces a correction angle instruction predetermined in accordance with the magnitude of the current actual value in the current intermittent region in which the load current becomes intermittent. In the current intermittent region, the sum of the firing angle instruction from the current control circuit and the correction angle instruction is used to determine the firing phase of the power converter and thereby to compensate for nonlinear response. The nonlinear compensation in the current intermittent region is made only in the transient state when the difference between the current target value and the current actual value exceeds a preset value.Thus, the stability at the steady state condition in the current intermittent region can be increased.
摘要翻译： 可以根据当前目标值和当前实际值流动之间的电流差的大小由从电流控制电路产生的触发角度指令来确定能够改变供给负载的功率的功率转换器的点火阶段 通过负载。 非线性补偿电路根据负载电流变得间歇的当前间歇区域中的当前实际值的大小产生校正角指令。 在当前间歇区域中，使用来自电流控制电路的触发角指令和校正角指令的和来确定功率转换器的点火相位，从而补偿非线性响应。 当前目标值和当前实际值之间的差超过预设值时，仅在瞬态状态下进行当前间歇区域中的非线性补偿。 因此，可以提高当前间歇区域的稳态条件下的稳定性。
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公开(公告)号：US3564388A
公开(公告)日：1971-02-16
申请号：US3564388D
申请日：1968-05-07
申请人： PHILIPS CORP
发明人： NOLF JEAN MARIE
CPC分类号： H02M7/1623 , G05F1/66 , H02M1/081 , H02M7/1555
摘要： A SYSTEM FOR REGULATING THE VOLTAGE TO A LOAD AS A LINEAR FUNCTION OF AN INPUT SIGNAL COMPRISES A CONTROLLED RECTIFIER IN SERIES WITH THE LOAD AND A SOURCE OF FULL WAVE RECTIFIED AC VOLTAGE. A CONTROL CIRCUIT IS CONNECTED TO THE RECTIFIER GATE ELECTRODE TO CONTROL THE FIRING ANGLE AS A FUNCTION OF SAID INPUT SIGNAL. THE CONTROL CIRCUIT INCLUDES A COMPARATOR TO WHICH IS APPLIED THE INPUT SIGNAL AND A CONSINUSOIDAL SAWTOOTH SIGNAL IN SYNCHRONISM WITH THE RECTIFIED AC PULSES, THE AMPLITUDE THEREOF BEING DIRECTLY PROPORTIONAL TO THE AMPLITUDE OF THE RECTIFIED AC PULSES AND STARTING FROM THE ZERO LEVEL OF THE INPUT SIGNAL. UPON EQUALITY OF THE TWO SIGNALS, THE COMPARATOR SUPPLYS A CONTROL SIGNAL TO THE RECTIFIER GATE ELECTRODE.
摘要翻译： 用于将负载的电压调节为输入信号的线性函数的系统包括与负载串联的受控整流器和全波整流AC电压源。 控制电路连接到整流栅电极，以根据所述输入信号控制触发角。 该控制电路包括比较器，该比较器与整流的AC脉冲同步地施加输入信号和一个渐变的锯齿波信号，其幅度与整流的AC脉冲的振幅成正比，并从输入信号的零电平开始 。 在两个信号相等的情况下，比较器向整流栅电极提供控制信号。
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