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公开(公告)号：US4638149A
公开(公告)日：1987-01-20
申请号：US507659
申请日：1983-06-27
申请人： Frank J. Wessel , Donald J. Hancock
发明人： Frank J. Wessel , Donald J. Hancock
CPC分类号： G05F3/04 , F03H1/0018
摘要： Power-processing unit uses AC buses (30, 32) to supply all current dependent needs such as connections (54, 56) to an ion thruster through an inductor (88) and the primary of a transformer (90), to assure limited currents to such loads. Where temperature control is also required, such as to the main discharge vaporizer heater connection (36, 38), switches (100, 102) are serially connected with inductor (96) and the primary of transformer (98). Temperature sensor (104) controls the switches (100, 102) for temperature regulation.
摘要翻译： 功率处理单元使用AC总线（30,32）通过电感器（88）和变压器（90）的初级线路将所有当前依赖的需求（例如连接（54,56））提供给离子推进器，以确保有限的电流 到这样的负载。 如果还需要温度控制，例如主排气蒸发器加热器连接（36,38），开关（100,102）与电感器（96）和变压器（98）的初级串联连接。 温度传感器（104）控制用于温度调节的开关（100,102）。
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公开(公告)号：US4835669A
公开(公告)日：1989-05-30
申请号：US249135
申请日：1988-09-26
CPC分类号： H02M3/33507
摘要： A dual mode flyback power supply 10 capable of automatically transitioning between operational modes in response to changes in the impedance of a load 12 connected thereto. The dual mode power supply 10 of the present invention includes an input voltage source 15 for providing input voltage and current. The power supply 10 also includes a first transformer 20 having primary N1, secondary N2 and tertiary N3 windings for supplying a first current to a load 12 operatively coupled to the secondary winding N2. The primary winding N1 is coupled to the input voltage source 15. A feedback circuit 50 provides a first signal in response to the current through the load 12 and a second signal in response to the load voltage exceeding a threshold voltage. The power supply 10 of the present invention further includes a switch 30 for controlling the input current through the primary winding N1 of the first transformer 20 in response to the first and second signals. A second transformer 25 having a primary winding operatively coupled to the tertiary winding N3 of the first transformer 20 supplies a second current to the load 12 in response to the current through the tertiary winding N3.
摘要翻译： 双模回扫电源10能够响应于与其连接的负载12的阻抗的变化而在操作模式之间自动转换。 本发明的双模式电源10包括用于提供输入电压和电流的输入电压源15。 电源10还包括具有初级N1，次级N2和三级N3绕组的第一变压器20，用于向可操作地耦合到次级绕组N2的负载12提供第一电流。 初级绕组N1耦合到输入电压源15.反馈电路50响应于通过负载12的电流提供第一信号，并响应于负载电压超过阈值电压而提供第二信号。 本发明的电源10还包括开关30，用于响应于第一和第二信号控制通过第一变压器20的初级绕组N1的输入电流。 具有可操作地耦合到第一变压器20的三次绕组N3的初级绕组的第二变压器25响应于通过第三绕组N3的电流而向负载12提供第二电流。
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3.发明授权
公开(公告)号：US4977329A
公开(公告)日：1990-12-11
申请号：US197237
申请日：1988-05-23
IPC分类号： H01L41/08 , H01L41/107 , H05K9/00
CPC分类号： H05K9/0018 , H01L41/107
摘要： Disclosed herein is an arrangement for shielding individual electronic units from undesired microwave or millimeter wave radiation while providing a means of transferring input and output signals and operating power through the shield wall. A metal box encapsulates an electronic unit. Input and output signals are fed into and transferred from the electronics unit through the shield wall using optical links and photo transmitting and receiving components. Power is transferred through the shield box wall using piezo crystals secured to the outside and inside of the shield box wall and a dielectric rod connected between the two piezo crystals through a hole in the wall. Electrical energy therefore can be transferred into mechanical energy transferred through the box wall to the piezo crystal within where it is received and transferred back into electrical energy. Accordingly, metal feedthroughs are not needed, eliminating any paths for radiation to enter the shield box.
摘要翻译： 本文公开了一种用于屏蔽各个电子单元免受不期望的微波或毫米波辐射的设置，同时提供传输输入和输出信号以及通过屏蔽壁工作电力的装置。 金属盒封装电子单元。 输入和输出信号通过光纤链路和照片发送和接收组件通过屏蔽墙馈送到电子单元并从电子单元传输。 电力通过屏蔽箱壁传递，使用固定在屏蔽箱壁的外部和内部的压电晶体，以及通过壁中的孔连接在两个压电晶体之间的介电棒。 因此，电能可以转移到通过箱壁传递到机械能的压电晶体中，在其中它被接收并转移回电能。 因此，不需要金属馈通，消除了辐射进入屏蔽盒的任何路径。
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公开(公告)号：US4733530A
公开(公告)日：1988-03-29
申请号：US892559
申请日：1986-08-04
申请人： John R. Beattie , Donald J. Hancock
发明人： John R. Beattie , Donald J. Hancock
CPC分类号： H01J27/022 , F03H1/0012 , F03H1/0037
摘要： An emission current control system for balancing the individual emission currents from an array of hollow cathodes has current sensors for determining the current drawn by each cathode from a power supply. Each current sensor has an output signal which has a magnitude proportional to the current. The current sensor output signals are averaged, the average value so obtained being applied to a respective controller for controlling the flow of an ion source material through each cathode. Also applied to each controller are the respective sensor output signals for each cathode and a common reference signal. The flow of source material through each hollow cathode is thereby made proportional to the current drawn by that cathode, the average current drawn by all of the cathodes, and the reference signal. Thus, the emission current of each cathode is controlled such that each is made substantially equal to the emission current of each of the other cathodes. When utilized as a component of a multiple hollow cathode ion propulsion motor, the emission current control system of the invention provides for balancing the thrust of the motor about the thrust axis and also for preventing premature failure of a hollow cathode source due to operation above a maximum rated emission current.
摘要翻译： 用于平衡来自空心阴极阵列的各个发射电流的发射电流控制系统具有用于确定由每个阴极从电源吸取的电流的电流传感器。 每个电流传感器具有与电流成正比的输出信号。 当前的传感器输出信号被平均，所得到的平均值被施加到相应的控制器，用于控制通过每个阴极的离子源材料的流动。 也适用于每个控制器是用于每个阴极的相应传感器输出信号和公共参考信号。 因此，源材料通过每个中空阴极的流动与由该阴极吸取的电流，由所有阴极吸引的平均电流和参考信号成比例。 因此，控制每个阴极的发射电流，使得每个阴极的发射电流基本上等于每个其它阴极的发射电流。 当用作多空心阴极离子推进电动机的组件时，本发明的发射电流控制系统提供了平衡电动机围绕推力轴线的推力，并且还用于防止由于上述操作以上的中空阴极源的过早失效 最大额定发射电流。
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公开(公告)号：US4757432A
公开(公告)日：1988-07-12
申请号：US560343
申请日：1983-12-12
申请人： Donald J. Hancock
发明人： Donald J. Hancock
IPC分类号： H02M3/337
CPC分类号： H02M7/53871 , H02M2007/4815 , Y02B70/1441
摘要： Current flow in a transistorized series resonant inverter is switched in an inherently simple and stable manner by time integrating the difference between the electrical output and a reference and varying the switching frequency of the inverter so as to null the time integrated difference in a feedback control loop. Each transistor is on for about half the resonant period of the tank circuit so that it is cut off at or slightly after the zero-crossing of the sinusoidal collector current.
摘要翻译： 晶体管串联谐振逆变器中的电流通过时间积分电输出和参考之间的差异并改变逆变器的开关频率，以固有的简单和稳定的方式切换，从而使反馈控制回路中的时间积分差无效 。 每个晶体管导通大约一半的谐振周期的谐振电路，使其在正弦集电极电流的过零点之后或之后被切断。
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