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公开(公告)号：US4677366A
公开(公告)日：1987-06-30
申请号：US862593
申请日：1986-05-12
CPC分类号： H02M1/4225 , H02M3/156 , Y02B70/126 , Y02P80/112
摘要： A unity power factor power supply which includes a boost converter connected to the alternating current line which is controlled to draw sinusoidal current from the line by operating as a current regulator having a current reference control signal which tracks the line voltage waveform, thereby to minimize the required input current for a given power output.
摘要翻译： 一个单位功率因数电源，其包括连接到交流电源线的升压转换器，该升压转换器被控制以通过作为具有跟踪线路电压波形的电流参考控制信号的电流调节器从线路中抽取正弦电流，从而最小化 给定功率输出所需的输入电流。
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公开(公告)号：US5019957A
公开(公告)日：1991-05-28
申请号：US383594
申请日：1989-07-24
申请人： Bruce L. Wilkinson
发明人： Bruce L. Wilkinson
CPC分类号： H02M1/34 , H02M3/33569 , H02M2001/348
摘要： A transformer isolated switched power supply of the forward converter type which includes a clamping circuit for the switching unit of the power supply which recovers the energy stored in the transformer during each switching cycle without any need to dissipate the energy, and which also serves to reverse the flux in the power transformer during each switching cycle to restore the flux capacity of the power transformer to the same level as in other types of converter circuits.
摘要翻译： 一种正向转换器类型的变压器隔离开关电源，其包括用于电源的开关单元的钳位电路，其在每个开关周期期间恢复存储在变压器中的能量，而不需要耗散能量，并且还用于反向 在每个开关周期期间电力变压器中的通量将电力变压器的通量容量恢复到与其他类型的转换器电路相同的电平。
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公开(公告)号：US4644252A
公开(公告)日：1987-02-17
申请号：US809033
申请日：1985-12-16
申请人： Bruce L. Wilkinson
发明人： Bruce L. Wilkinson
CPC分类号： H02M3/135
摘要： An isolation circuit for preventing the current surges drawn by a direct current cooling fan from appearing in the output of the power supply. The fan has one terminal connected to one terminal of the power supply, and a regulator circuit connects the other terminal of the fan to the other terminal of the power supply. The regulator circuit includes a capacitor connected across the fan to provide a low impedance circulating path for the current surges, and it also includes a network which provides a constant current to the parallel combination of the fan and capacitor.
摘要翻译： 隔离电路，用于防止由直流冷却风扇引起的电流浪涌出现在电源的输出端。 风扇有一个端子连接到电源的一个端子，调节器电路将风扇的另一个端子连接到电源的另一个端子。 调节器电路包括跨过风扇连接的电容器，以提供用于电流浪涌的低阻抗循环路径，并且还包括向风扇和电容器的并联组合提供恒定电流的网络。
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公开(公告)号：US4037974A
公开(公告)日：1977-07-26
申请号：US648177
申请日：1976-01-12
CPC分类号： G01N21/03 , G01N2201/0642
摘要： A sample cell is provided for spectrophotometers which is constructed to prevent stray light from being carried to the detector through the wall of the cell. This is achieved by configuring the cell wall in a manner so that it cannot function as a light pipe for the stray light, or by providing light attenuating means in the cell wall, or by providing an appropriate masking means in the wall.
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公开(公告)号：US3936773A
公开(公告)日：1976-02-03
申请号：US515499
申请日：1974-10-17
申请人： Bruce L. Wilkinson
发明人： Bruce L. Wilkinson
CPC分类号： H03B5/20 , H03B2200/0066 , H03B2200/0078 , H03B2201/02 , H03B27/00
摘要： A voltage controlled sine wave oscillator is provided in which the frequency of the output signal is a linear function of the amplitude of an input control signal. The output signal may be of constant amplitude with changes in frequency, or its amplitude may be a linear function of its frequency. Two-phase quadrature output signals may be provided for multi-phase applications. The oscillator of the invention in the embodiment to be described herein is solid state, and it makes use of operational integrators, analog multipliers, and associated circuitry to generate the outputs.
摘要翻译： 提供了一种电压控制正弦波振荡器，其中输出信号的频率是输入控制信号幅度的线性函数。 输出信号可以具有恒定幅度随频率变化，或者其幅度可能是其频率的线性函数。 可以为多相应用提供两相正交输出信号。 本文中要描述的实施例中的本发明的振荡器是固态的，并且其利用操作积分器，模拟乘法器和相关电路来产生输出。
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公开(公告)号：US4663699A
公开(公告)日：1987-05-05
申请号：US722380
申请日：1985-04-12
申请人： Bruce L. Wilkinson
发明人： Bruce L. Wilkinson
IPC分类号： H02M3/335
CPC分类号： H02M3/33576 , H02M3/33592 , Y02B70/1475
摘要： A high power factor, regulated synchronous converter for converting 110-volt, rectified, 50-60 Hz alternating current into a direct current output, which has enhanced hold up (energy storage). The circuit includes a half-bridge inverter for converting the half-wave rectified voltage into high frequency alternating current in the range of 20-30 KHz. The high frequency alternating current is coupled through an inductance coil to a half-bridge synchronous regulator/rectifier which produces a direct current output. The energy delivered to the half-bridge synchronous regulator/rectifier is stored in a capacitor, and the voltage across the capacitor may be regulated making energy storage independent of the line voltage. Additional synchronous regulator/rectifiers may be coupled to the circuit to produce additional direct current outputs.
摘要翻译： 高功率因数，调节型同步转换器，用于将110伏，整流，50-60赫兹的交流电转换成直流输出，具有增强的保持能量（能量存储）。 该电路包括用于将半波整流电压转换为20-30KHz范围内的高频交流电的半桥逆变器。 高频交流电通过电感线圈耦合到产生直流输出的半桥同步调节器/整流器。 输送到半桥同步调节器/整流器的能量存储在电容器中，电容器两端的电压可以被调节，使得能量存储与线路电压无关。 附加的同步调节器/整流器可以耦合到电路以产生额外的直流输出。
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公开(公告)号：US4384320A
公开(公告)日：1983-05-17
申请号：US342466
申请日：1982-01-25
CPC分类号： H02M3/3376
摘要： A system is provided for driving the switching transistors in a push-pull switching mode inverter-type power supply. The system of the invention provides drive current adjusted to the actual power supply load throughout the entire switching cycle from turn-on to the completion of turn-off for each of the switching transistors. There is essentially zero power dissipation in the various elements which make up the system. Moreover, the system obtains substantially all of its drive power from the outputs of the switching transistors themselves, and it provides transformer isolation for the switching transistors.
摘要翻译： 提供一种用于在推挽式开关模式的逆变器型电源中驱动开关晶体管的系统。 本发明的系统提供了在整个开关周期中调整到实际电源负载的驱动电流，从开启到关闭每个开关晶体管的关断。 构成系统的各种元件的功耗基本上为零。 此外，该系统从开关晶体管本身的输出中获得基本上所有的驱动功率，并为开关晶体管提供变压器隔离。
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