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    • 1. 发明授权
    • High voltage pulsed power supply with time limiting nonlinear feedback
    • 具有时间限制非线性反馈的高压脉冲电源
    • US4614999A
    • 1986-09-30
    • US656726
    • 1984-10-01
    • Toshihiro OnoderaShigeru TanakaSunao Matsumoto
    • Toshihiro OnoderaShigeru TanakaSunao Matsumoto
    • H05G1/20H05G1/32H02M3/315
    • H05G1/20H05G1/32
    • An apparatus for supplying high voltage pulsed direct current to an X-ray tube includes a transformer, a high frequency inverter circuit and a nonlinear feedback loop. The invention uses the high frequency inverter connected in series with a DC power supply source and the primary winding of the transformer in order to generate high voltage, high frequency AC in the secondary winding. A rectifier connected to the secondary winding supplies high voltage pulsed DC to the X-ray tube. A detector, such as a voltage divider, detects the voltage supplied to the X-ray tube and supplies a representation of it to a nonlinear feedback circuit connected between the detector and the high frequency inverter. The inverter circuit includes at least one switch generated by electrical pulses. The nonlinear feedback circuit controls the duty cycle of the inverter during only a portion of the output voltage range of the high voltage pulsed power supply, preferably only after the output voltage reaches 90% of the rated high voltage to be supplied to the X-ray tube.
    • 用于向X射线管提供高压脉冲直流电的装置包括变压器,高频逆变器电路和非线性反馈回路。 本发明使用与直流电源和变压器初级绕组串联的高频逆变器,以便在次级绕组中产生高电压,高频交流。 连接到次级绕组的整流器向X射线管提供高压脉冲DC。 诸如分压器的检测器检测提供给X射线管的电压并将其表示提供给连接在检测器和高频逆变器之间的非线性反馈电路。 逆变器电路包括由电脉冲产生的至少一个开关。 非线性反馈电路仅在高压脉冲电源的输出电压范围的一部分期间控制逆变器的占空比,优选仅在输出电压达到要提供给X射线的额定高电压的90%之后 管。
    • 2. 发明授权
    • Heating circuit for a filament of an X-ray tube
    • X射线管灯丝的加热回路
    • US4573184A
    • 1986-02-25
    • US655073
    • 1984-09-26
    • Shigeru TanakaToshihiro Onodera
    • Shigeru TanakaToshihiro Onodera
    • H05G1/34
    • H05G1/34
    • The dissipation of the filament power of an X-ray tube is controlled by a heating circuit including a voltage resonance type DC-to-DC converter and a filament current detector/controller. The DC-to-DC converter is comprised of a switch, a capacitor, a damper diode and a transformer. These circuit elements constitute a voltage resonance type switch. A DC voltage is interrupted and applied to the primary winding of the transformer. The AC voltage is induced to the secondary winding of the transformer, thereby heating the filament of the X-ray tube. In accordance with the load curve of the X-ray tube, the filament heating voltage can be controlled within a control range defined by the resonant conditions of the switch.
    • X射线管的灯丝功率耗散由包括电压谐振型DC-DC转换器和灯丝电流检测器/控制器的加热电路控制。 DC-DC转换器由开关,电容器,阻尼二极管和变压器组成。 这些电路元件构成电压谐振型开关。 直流电压中断并施加到变压器的初级绕组。 AC电压被感应到变压器的次级绕组,从而加热X射线管的灯丝。 根据X射线管的负载曲线,可以将灯丝加热电压控制在由开关的谐振条件限定的控制范围内。
    • 4. 发明授权
    • Elastic surface wave devices
    • 弹性表面波装置
    • US4065734A
    • 1977-12-27
    • US705177
    • 1976-07-14
    • Shouzo TakenoMasao MashitaToshihiro Onodera
    • Shouzo TakenoMasao MashitaToshihiro Onodera
    • H03H9/00H03H9/02H03H9/145H03H9/04H01L41/18H03H9/26H03H9/30
    • H03H9/02834H03H9/02574
    • The elastic surface wave device comprises a piezoelectric substrate having a dielectric constant of .epsilon..sub.2, a dielectric film having a dielectric constant of .epsilon..sub.1 and a thickness of h, and deposited on the piezoelectric substrate, and an inter-digital type input-ouput transducer formed on the dielectric film. The ratio of the dielectric constants .epsilon..sub.1 /.epsilon..sub.2, and a function 2.pi./.lambda..multidot.h proportioned to the thickness of the dielectric film are selected to satisfy a condition established in a frustum shaped region bounded by coordinate points P (.epsilon..sub.1 /.epsilon..sub.2 = 1/5,(2.pi./.lambda.).multidot.h = 0.1), Q(.epsilon..sub.1 /.epsilon..sub.2 = 1/5,(2.pi./.lambda.).multidot.h = 0.00016), R(.epsilon..sub.1 /.epsilon..sub.2 = 1/500,(2.pi./.lambda.).multidot.h = 0.0004), and S(.epsilon..sub.1 /.epsilon..sub.2 = 1/500, (2.pi./.lambda.).multidot.h = 0.006) on a graph wherein the ratio .epsilon..sub.1 /.epsilon..sub.2 is represented on the ordinate and the function (2.pi./80 ).multidot.h on the abscissa, where .lambda. represents the wavelength of the elastic surface wave. As a result, the energy of the elastic surface waves is propagated from the input transducer to the output transducer with a sufficiently large power.
    • 弹性表面波装置包括介电常数为ε2的压电基片,介电常数ε为1且厚度为h的电介质膜,并沉积在压电基片上,以及数字型输入输出传感器 形成在电介质膜上。 选择介电常数ε1 /ε2与与电介质膜的厚度成比例的函数2π/λ×h的比率以满足在由坐标点P(ε1 /ε 2 = 1/5,(2π/λ)×h = 0.1),Q(ε1 /ε2 = 1/5,(2π/λ)×h = 0.00016),R(ε1 /ε2 = 500,(2π/λ)xh = 0.0004)和S(ε1 /ε2 = 1/500,(2 pi /λ)xh = 0.006),其中ε1 / 纵坐标和横坐标上的函数(2 pi / 80)xh,其中λ表示弹性表面波的波长。 结果,弹性表面波的能量以足够大的功率从输入传感器传播到输出换能器。
    • 10. 发明授权
    • High voltage resonant DC/DC converter
    • 高压谐振DC / DC转换器
    • US4725938A
    • 1988-02-16
    • US912657
    • 1986-09-29
    • Toshihiro Onodera
    • Toshihiro Onodera
    • H02M3/135H02M3/28H02M7/10H05G1/02H05G1/20H02M3/315
    • H02M7/10H02M3/135H05G1/02H05G1/20
    • A high voltage DC/DC converter including a voltage resonance switching circuit formed by a coreless transformer, a GTO thyristor switching element connected between the primary winding of the transformer and a D.C. source, and a voltage resonance capacitor connected in parallel to the switching element. A rectifier circuit is connected to the secondary winding of the transformer to rectify an output current from the transformer circuit. The resonance frequency of the parallel resonance circuit made of the resonance capacitor and the coreless transformer is selected to be the frequency of that component of the current supplied to the circuit through the switching element, which has a greater amplitude than any other component of the current (including the fundamental frequency and other harmonic).
    • 一种高压DC / DC转换器,包括由无芯变压器形成的电压共振切换电路,连接在变压器的初级绕组和直流电源之间的GTO晶闸管开关元件和与开关元件并联连接的电压谐振电容器。 整流电路连接到变压器的次级绕组,以对来自变压器电路的输出电流进行整流。 由谐振电容器和无芯变压器构成的并联谐振电路的谐振频率被选择为通过开关元件提供给电路的电流的分量的频率,该开关元件的振幅大于电流的任何其它分量 (包括基频和其他谐波)。