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公开(公告)号：US20190058404A1
公开(公告)日：2019-02-21
申请号：US15678282
申请日：2017-08-16
IPC分类号： H02M3/335 , H05G1/32 , G01R19/165
摘要： In the present invention, a high-voltage DC/DC converter suitable for powering x-ray tubes and the like provides control of a voltage applied to a resonant circuit at least in part according to a timing of a monitored voltage on the resonator thereby compensating for variations in the parameter stability of the resonant circuit, nonlinearity in the resonant gain curve and frequency dependencies.
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公开(公告)号：US09970889B2
公开(公告)日：2018-05-15
申请号：US14658913
申请日：2015-03-16
摘要： The present inventors have recognized that fall times between high-kV to low-kV levels (during a “dual energy” or “fast-kV” energy scan) are linked to the discharge of HV (high voltage) capacitance. In an embodiment of the invention, a high voltage generator may be activated during fall transitions from first to second energy levels in order to substantially maintain a predetermined fall transition time. Accordingly, substantially equal energy distributions between high-kV and low-kV levels may be achieved.
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公开(公告)号：US20160192466A1
公开(公告)日：2016-06-30
申请号：US14658943
申请日：2015-03-16
CPC分类号： H05G1/58 , G01N2223/419 , H05G1/32
摘要： Rise times and fall times provided by a high voltage generator are controlled to maintain image quality during such scans. The rise and fall times are controlled by first measuring rise and fall times at each transition. Then, a closed-loop controller is used to adjust control parameters of the high voltage generator, based on an error determined from the measurement, to achieve substantially constant rise and fall times. This invention may be based on the implementation of two closed-loop controllers on rise and fall time of fast-kV exposures. As a result, image quality may be improved and system calibration time may be reduced.
摘要翻译： 控制由高压发生器提供的上升时间和下降时间以在这种扫描期间保持图像质量。 上升和下降时间通过首先测量每个转换的上升和下降时间来控制。 然后，使用闭环控制器，基于从测量确定的误差来调节高压发生器的控制参数，以实现基本恒定的上升和下降时间。 本发明可以基于两个闭环控制器对快速kV暴露的上升和下降时间的实现。 结果，可以提高图像质量，并且可以减少系统校准时间。
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公开(公告)号：US20160192465A1
公开(公告)日：2016-06-30
申请号：US14658913
申请日：2015-03-16
摘要： The present inventors have recognized that fall times between high-kV to low-kV levels (during a “dual energy” or “fast-kV” energy scan) are linked to the discharge of HV (high voltage) capacitance. In an embodiment of the invention, a high voltage generator may be activated during fall transitions from first to second energy levels in order to substantially maintain a predetermined fall transition time. Accordingly, substantially equal energy distributions between high-kV and low-kV levels may be achieved.
摘要翻译： 本发明人认识到，在高kV至低kV电平之间（在“双能量”或“快速kV”能量扫描期间）的下降时间与HV（高电压）电容的放电有关。 在本发明的一个实施例中，高压发生器可以在从第一到第二能级的跳变转变期间被激活，以便基本保持预定的下降转变时间。 因此，可以实现高kV和低kV电平之间的基本上相等的能量分布。
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公开(公告)号：US10530261B2
公开(公告)日：2020-01-07
申请号：US15678282
申请日：2017-08-16
摘要： In the present invention, a high-voltage DC/DC converter suitable for powering x-ray tubes and the like provides control of a voltage applied to a resonant circuit at least in part according to a timing of a monitored voltage on the resonator thereby compensating for variations in the parameter stability of the resonant circuit, nonlinearity in the resonant gain curve and frequency dependencies.
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公开(公告)号：US09992855B2
公开(公告)日：2018-06-05
申请号：US14658943
申请日：2015-03-16
CPC分类号： H05G1/58 , G01N2223/419 , H05G1/32
摘要： Rise times and fall times provided by a high voltage generator are controlled to maintain image quality during such scans. The rise and fall times are controlled by first measuring rise and fall times at each transition. Then, a closed-loop controller is used to adjust control parameters of the high voltage generator, based on an error determined from the measurement, to achieve substantially constant rise and fall times. This invention may be based on the implementation of two closed-loop controllers on rise and fall time of fast-kV exposures. As a result, image quality may be improved and system calibration time may be reduced.
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