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    • 15. 发明申请
    • DRIVER CIRCUIT FOR DRIVING A LOAD CIRCUIT
    • 用于驱动负载电路的驱动电路
    • WO2011070481A2
    • 2011-06-16
    • PCT/IB2010/055517
    • 2010-12-01
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBHDEPPE, CarstenHATTRUP, Christian
    • DEPPE, CarstenHATTRUP, Christian
    • H05B41/28H02J7/345
    • Driver circuits (1) for driving load circuits (2, 3) receive source signals from sources and provide feeding signals to the load circuits (2,3) and charging signals to capacitor circuits (21). These capacitor circuits (21) provide supporting signals to the load circuits (2, 3) in addition to the feeding signals. By providing the driver circuits (1) with control circuits (22) for controlling the supporting signals, the capacitor circuits (21) can become less bulky / costly and/or will limit the lifetime of the driver circuits (1) to a smaller extent. Further, these driver circuits (1) may get improved efficiencies. Said controlling may comprise controlling moments in time at which the supporting signals are offered to the load circuits (2, 3) or not, and/or may comprise controlling sizes of the supporting signals, and/or may be done in response to detection results from detectors (23) for detecting parameters of one or more signals. Said controlling may comprise switching via switches (24).
    • 用于驱动负载电路(2,3)的驱动电路(1)从源接收源信号,并向负载电路(2,3)提供馈送信号,并向电容器电路(21)提供充电信号。 除了馈送信号之外,这些电容器电路(21)还向负载电路(2,3)提供支持信号。 通过为驱动电路(1)提供用于控制支持信号的控制电路(22),电容器电路(21)可以变得较不庞大/昂贵,和/或将驱动电路(1)的寿命限制在更小的程度上 。 此外,这些驱动器电路(1)可以提高效率。 所述控制可以包括将支持信号提供给负载电路(2,3)的时间的控制时刻和/或可以包括控制支持信号的大小和/或可以响应于检测结果来完成 来自用于检测一个或多个信号的参数的检测器(23)。 所述控制可以包括通过开关(24)的切换。
    • 16. 发明申请
    • POWER SUPPLY SYSTEM
    • 电源系统
    • WO2002097957A2
    • 2002-12-05
    • PCT/IB2002/001888
    • 2002-05-28
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.PHILIPS CORPORATE INTELLECTUAL PROPERTY GMBHSCHEEL, ThomasHATTRUP, ChristianMAERTENS, OlafGERCKE, Thorsten
    • SCHEEL, ThomasHATTRUP, ChristianMAERTENS, OlafGERCKE, Thorsten
    • H02M3/337
    • H02M7/5236H02M2001/0012H05G1/10H05G1/58
    • Two proposals are made for power supply systems comprising at least one resonant inverter and one control unit. According to the first proposal the power supply system comprises two inverters and produces two output voltages, the control circuit processing as an actual value on the one hand the sum of and on the other hand the difference between the two output voltages. According to the second proposal a control circuit does not directly process the controlled variables for a power supply system comprising at least one inverter, but difference units for controlled variables determine the deviations from a preceding sampling instant and these difference values are processed. Also the correcting variable calculated in this way is a difference value which is converted into a correcting variable value by a correcting variable summing unit. The two proposals can be advantageously combined. As an important improvement is proposed the use of a limiting controller which generally becomes active in case of imminent transgression of a maximum value and which limits the actuation. The control circuit is preferably used as a digital control circuit for a state space control.
    • 对于包括至少一个谐振逆变器和一个控制单元的电力供应系统提出了两个建议。 根据第一个提议,电源系统包括两个反相器并产生两个输出电压,一方面将控制电路作为实际值进行处理,另一方面是两个输出电压之间的差值。 根据第二方案,控制电路不直接处理包括至少一个逆变器的电源系统的受控变量,但是用于受控变量的差分单元确定与先前采样时刻的偏差,并且处理这些差值。 此外,以这种方式计算的校正变量是通过校正变量求和单元被转换为校正变量值的差值。 这两个方案可以有利地组合。 作为重要的改进,提出了一种限制控制器的使用,该限制控制器通常在即将发生最大值并且限制致动的情况下变得有效。 控制电路优选地用作用于状态空间控制的数字控制电路。
    • 17. 发明申请
    • GRADIENT AMPLIFIER WITH COMPENSATION FOR DEAD TIME AND FORWARD VOLTAGE
    • 具有补偿时间和正向电压的梯度放大器
    • WO2013046099A1
    • 2013-04-04
    • PCT/IB2012/054991
    • 2012-09-20
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH
    • SCHEEL, ThomasHATTRUP, Christian
    • G01R33/385H03F3/217
    • G01R33/387G01R33/3852G01R33/543G01R33/56572H03F3/2173
    • The present invention relates to a method for compensating non-linearities of a gradient amplifier (1) for powering a gradient coil (16), wherein the non-linearities are caused by the finite dead time of the amplifier and/or by a forward voltage drop, the gradient amplifier (1) comprising a controllable full bridge (8) and an output filter (9), whereby the full bridge (8) is controlled to provide a desired coil current (i c ), comprising the steps of receiving a desired duty cycle (a eff ) of the gradient amplifier (1), measuring an input current (ifilt) and an output voltage (ucfilt) of the output filter (9), evaluating an modulator duty cycle (a mod ) as a function of the desired duty cycle (a eff ) and the measured input current (ifilt) and the measured output voltage (ucfilt), and providing the modulator duty cycle (a mod ) for controlling the full bridge (8). The present invention further relates to a gradient amplifier (1) for powering a gradient coil (16) comprising a controllable full bridge (8) comprising at least two half bridges (10), each half bridge (10) having at least two power switches (11) connected in series, whereby each half bridge (10) is tapped at its center point between two the power switches (11), and an output filter (9) connected to the tapped center points of the half bridges (10), a controller unit (4) for providing a desired duty cycle (a eff ) of the gradient amplifier (1), a compensation block (5) for providing an modulator duty cycle (a mod ) as a compensation of the desired duty cycle (a eff ) according to any of the above method claims, and a modulator (6) for controlling the power switches (11) according to the modulator duty cycle (a mod ) provided by the compensation unit (5).
    • 本发明涉及一种用于补偿用于对梯形线圈(16)供电的梯度放大器(1)的非线性的方法,其中非线性由放大器的有限死区时间和/或正向电压 包括可控全桥(8)和输出滤波器(9)的梯度放大器(1),由此控制全桥(8)以提供期望的线圈电流(ic),包括以下步骤:接收期望的 测量斜波放大器(1)的占空比(aeff),测量输出滤波器(9)的输入电流(ifilt)和输出电压(ucfilt),评估作为所需占空比的函数的调制器占空比(amod) 周期(aeff)和测量的输入电流(ifilt)和测量的输出电压(ucfilt),并提供用于控制全桥(8)的调制器占空比(amod)。 本发明还涉及一种用于为包括至少两个半桥(10)的可控全桥(8)供电的梯度线圈(16)供电的梯度放大器(1),每个半桥(10)具有至少两个功率开关 (11),其中每个半桥(10)在其两个功率开关(11)之间的中心点被分接,以及连接到半桥(10)的抽头中心点的输出滤波器(9) 用于提供所述梯度放大器(1)的期望占空比(aeff)的控制器单元(4),用于提供调制器占空比(amod)作为期望占空比(aeff)的补偿的补偿块(5) 用于根据由补偿单元(5)提供的调制器占空比(amod)来控制功率开关(11)的调制器(6)。