公开(公告)号：US09389288B2

公开(公告)日：2016-07-12

申请号：US13618909

申请日：2012-09-14

申请人： Juan Antonio Sabate ,  Rixin Lai ,  Lei Wang

发明人： Juan Antonio Sabate ,  Rixin Lai ,  Lei Wang

IPC分类号： G01R33/34 ,  G01R33/341 ,  G01R33/385

CPC分类号： G01R33/34 ,  G01R33/341 ,  G01R33/3852 ,  G01R33/3854

摘要： In one embodiment, a system includes a gradient coil driver configured to supply electrical signals to a gradient coil of a magnetic resonance imaging system. The gradient coil driver includes an electronic circuit. The electronic circuit includes a first H-bridge circuit electrically coupled to a power source. The first H-bridge includes a plurality of metal-oxide-semiconductor field-effect transistor (MOSFET) switches; and a plurality of diodes electrically coupled in parallel with each MOSFET switch. Each diode of the plurality of diodes is configured to conduct current to cause zero voltage potential across a source and a drain of one of the plurality of MOSFET switches. The first H-bridge also includes a load configured to regulate currents flowing through each of the plurality of diodes and each MOSFET switch of the plurality of MOSFET switches.

摘要翻译： 在一个实施例中，系统包括被配置为向磁共振成像系统的梯度线圈提供电信号的梯度线圈驱动器。 梯度线圈驱动器包括电子电路。 电子电路包括电耦合到电源的第一H桥电路。 第一H桥包括多个金属氧化物半导体场效应晶体管（MOSFET）开关; 以及与每个MOSFET开关并联电耦合的多个二极管。 多个二极管中的每个二极管被配置为传导电流以在多个MOSFET开关之一的源极和漏极两端产生零电压电位。 第一H桥还包括配置成调节流过多个MOSFET开关中的多个二极管和每个MOSFET开关中的每一个的电流的负载。

公开(公告)号：US20140077812A1

公开(公告)日：2014-03-20

申请号：US13618909

申请日：2012-09-14

申请人： Juan Antonio Sabate ,  Rixin Lai ,  Lei Wang

发明人： Juan Antonio Sabate ,  Rixin Lai ,  Lei Wang

IPC分类号： G01R33/34 ,  G01R33/341

CPC分类号： G01R33/34 ,  G01R33/341 ,  G01R33/3852 ,  G01R33/3854

摘要： In one embodiment, a system includes a gradient coil driver configured to supply electrical signals to a gradient coil of a magnetic resonance imaging system. The gradient coil driver includes an electronic circuit. The electronic circuit includes a first H-bridge circuit electrically coupled to a power source. The first H-bridge includes a plurality of metal-oxide-semiconductor field-effect transistor (MOSFET) switches; and a plurality of diodes electrically coupled in parallel with each MOSFET switch. Each diode of the plurality of diodes is configured to conduct current to cause zero voltage potential across a source and a drain of one of the plurality of MOSFET switches. The first H-bridge also includes a load configured to regulate currents flowing through each of the plurality of diodes and each MOSFET switch of the plurality of MOSFET switches.

摘要翻译： 在一个实施例中，系统包括被配置为向磁共振成像系统的梯度线圈提供电信号的梯度线圈驱动器。 梯度线圈驱动器包括电子电路。 电子电路包括电耦合到电源的第一H桥电路。 第一H桥包括多个金属氧化物半导体场效应晶体管（MOSFET）开关; 以及与每个MOSFET开关并联电耦合的多个二极管。 多个二极管中的每个二极管被配置为传导电流以在多个MOSFET开关之一的源极和漏极两端产生零电压电位。 第一H桥还包括配置成调节流过多个MOSFET开关中的多个二极管和每个MOSFET开关中的每一个的电流的负载。

公开(公告)号：US20120249145A1

公开(公告)日：2012-10-04

申请号：US13076823

申请日：2011-03-31

申请人： Rixin Lai ,  Luis Jose Garces ,  Juan Antonio Sabate ,  Juan Manuel Rivas Davila ,  Song Chi ,  Wesley Michael Skeffington

发明人： Rixin Lai ,  Luis Jose Garces ,  Juan Antonio Sabate ,  Juan Manuel Rivas Davila ,  Song Chi ,  Wesley Michael Skeffington

IPC分类号： G01R33/44 ,  H03F3/68

CPC分类号： G01R33/3852

摘要： A gradient amplifier system is presented. An embodiment of a gradient amplifier system that includes a power stage having a plurality of bridge amplifiers, where each of the plurality of bridge amplifiers operates at a first switching frequency. The gradient amplifier system further includes a gradient coil coupled to an output terminal of the power stage and configured to produce a magnetic field proportional to a coil current signal supplied by the power stage. In addition, the gradient amplifier system includes a controller stage coupled to an input terminal of the power stage and configured to generate a pulse width modulated gate signal based on the coil current signal and a reference current signal, where the pulse width modulated gate signal is generated at a second switching frequency upon occurrence of a slew rate associated with the reference current signal is below a determined threshold rate and an amplitude level associated with the reference current signal is above a determined level. Further, the controller stage is configured to apply the generated pulse width modulated gate signal to the power stage for changing an operating frequency of each of the plurality of bridge amplifiers from the first switching frequency to the second switching frequency.

摘要翻译： 提出了一种梯度放大器系统。 一种梯度放大器系统的实施例，其包括具有多个桥接放大器的功率级，其中多个桥接放大器中的每一个以第一开关频率工作。 梯度放大器系统还包括耦合到功率级的输出端并被配置为产生与由功率级提供的线圈电流信号成比例的磁场的梯度线圈。 此外，梯度放大器系统包括耦合到功率级的输入端子并被配置为基于线圈电流信号和参考电流信号产生脉宽调制门信号的控制器级，其中脉宽调制门信号为 在与参考电流信号相关联的转换速率出现时以第二开关频率产生的信号低于所确定的阈值速率，并且与参考电流信号相关联的幅度电平高于所确定的电平。 此外，控制级被配置为将产生的脉宽调制门信号施加到功率级，用于将多个桥接放大器中的每一个的工作频率从第一开关频率改变为第二开关频率。

公开(公告)号：US08502539B2

公开(公告)日：2013-08-06

申请号：US13076823

申请日：2011-03-31

申请人： Rixin Lai ,  Luis Jose Garces ,  Juan Antonio Sabate ,  Juan Manuel Rivas Davila ,  Song Chi ,  Wesley Michael Skeffington

发明人： Rixin Lai ,  Luis Jose Garces ,  Juan Antonio Sabate ,  Juan Manuel Rivas Davila ,  Song Chi ,  Wesley Michael Skeffington

IPC分类号： G01V3/00

CPC分类号： G01R33/3852

摘要： A gradient amplifier system is presented. An embodiment of a gradient amplifier system that includes a power stage having a plurality of bridge amplifiers, where each of the plurality of bridge amplifiers operates at a first switching frequency. The gradient amplifier system further includes a gradient coil coupled to an output terminal of the power stage and configured to produce a magnetic field proportional to a coil current signal supplied by the power stage. In addition, the gradient amplifier system includes a controller stage coupled to an input terminal of the power stage and configured to generate a pulse width modulated gate signal based on the coil current signal and a reference current signal, where the pulse width modulated gate signal is generated at a second switching frequency upon occurrence of a slew rate associated with the reference current signal is below a determined threshold rate and an amplitude level associated with the reference current signal is above a determined level. Further, the controller stage is configured to apply the generated pulse width modulated gate signal to the power stage for changing an operating frequency of each of the plurality of bridge amplifiers from the first switching frequency to the second switching frequency.

摘要翻译： 提出了一种梯度放大器系统。 一种梯度放大器系统的实施例，其包括具有多个桥接放大器的功率级，其中多个桥接放大器中的每一个以第一开关频率工作。 梯度放大器系统还包括耦合到功率级的输出端并被配置为产生与由功率级提供的线圈电流信号成比例的磁场的梯度线圈。 此外，梯度放大器系统包括耦合到功率级的输入端子并被配置为基于线圈电流信号和参考电流信号产生脉宽调制门信号的控制器级，其中脉宽调制门信号为 在与参考电流信号相关联的转换速率出现时以第二开关频率产生的信号低于所确定的阈值速率，并且与参考电流信号相关联的幅度电平高于所确定的电平。 此外，控制级被配置为将产生的脉宽调制门信号施加到功率级，用于将多个桥接放大器中的每一个的工作频率从第一开关频率改变为第二开关频率。

公开(公告)号：US06930483B2

公开(公告)日：2005-08-16

申请号：US10632283

申请日：2003-08-01

申请人： Juan Antonio Sabate ,  Robert Louis Steigerwald ,  Michael Joseph Schutten

发明人： Juan Antonio Sabate ,  Robert Louis Steigerwald ,  Michael Joseph Schutten

IPC分类号： G01R33/36 ,  G01V3/00

CPC分类号： G01R33/3614

摘要： A method of operating a system having a coil includes providing a switched amplified current to the coil, and adding a second current to the switched amplified current, wherein the second current is substantially out of phase with the switched amplified current such that the coil receives current with substantially no switching frequency ripple.

摘要翻译： 一种操作具有线圈的系统的方法包括向线圈提供开关放大电流，并向开关放大电流增加第二电流，其中第二电流与开关放大电流基本上不同相，使得线圈接收电流 基本上没有开关频率纹波。

公开(公告)号：US20090231890A1

公开(公告)日：2009-09-17

申请号：US12075588

申请日：2008-03-11

申请人： Michael Joseph Schutten ,  Robert Louis Steigerwald ,  John Stanley Glaser ,  Juan Antonio Sabate ,  Michael Andrew de Rooij

发明人： Michael Joseph Schutten ,  Robert Louis Steigerwald ,  John Stanley Glaser ,  Juan Antonio Sabate ,  Michael Andrew de Rooij

IPC分类号： H02M1/12 ,  H02M7/02

CPC分类号： H02M1/126 ,  H02M1/4225 ,  Y02B70/126 ,  Y02E10/56

摘要： A boost inductor value reduction circuit is integrated into a traditional boost power converter to greatly reduce undesirable high frequency harmonics from being fed back to the input side of the boost power converter. The boost inductor value reduction circuit is very small when compared with traditional filter techniques, is less costly than traditional filter techniques, and does not degrade the boost power converter control performance. It can also be used to reduce the size of the boost inductor without compromising the converter performance for use in energy efficient sensitive applications such as photovoltaic inverters.

摘要翻译： 升压电感值降低电路集成到传统升压功率转换器中，以大大减少不期望的高频谐波从反馈到升压功率转换器的输入侧。 与传统的滤波器技术相比，升压电感值降低电路非常小，与传统的滤波器技术相比成本较低，并且不会降低升压功率转换器的控制性能。 它也可以用于减小升压电感器的尺寸，而不会影响转换器性能，用于节能敏感应用，如光伏逆变器。

公开(公告)号：US07327092B2

公开(公告)日：2008-02-05

申请号：US11290670

申请日：2005-11-30

申请人： Antonio Caiafa ,  Juan Antonio Sabate

发明人： Antonio Caiafa ,  Juan Antonio Sabate

IPC分类号： H05B37/00

CPC分类号： H05G1/10 ,  H05G1/52 ,  Y10T307/647

摘要： A circuit for driving the current for inductive loads such as an electron beam deflection coil for an x-ray generator system. The circuit includes two selectable voltage levels provided by a high level and a low level source. A plurality of switches selects the voltage level and determines the polarity of the current through the coil. The high level source is selected when the load is charging or discharging. The low level source is selected when the load is operating in a constant current mode, where a high frequency switching device controls the voltage through the load by switching the low level source to generate a PWM waveform according to a reference current duty cycle. A feedback loop monitors the current through the load to adjust the duty cycle of the PWM waveform to more accurately control the current through the load.

摘要翻译： 用于驱动用于感应负载的电流的电路，例如用于X射线发生器系统的电子束偏转线圈。 该电路包括由高电平和低电平源提供的两个可选择的电压电平。 多个开关选择电压电平并确定通过线圈的电流的极性。 当负载充电或放电时，选择高电平源。 当负载在恒流模式下工作时，选择低电平源，其中高频开关器件通过切换低电平源来控制负载中的电压，以根据参考电流占空比产生PWM波形。 反馈回路监控负载中的电流，以调整PWM波形的占空比，以更准确地控制通过负载的电流。

公开(公告)号：US08330299B2

公开(公告)日：2012-12-11

申请号：US13171683

申请日：2011-06-29

申请人： Robert Louis Steigerwald ,  Ahmed Elasser ,  Juan Antonio Sabate ,  Maja Harfman Todorovic ,  Mohammed Agamy

发明人： Robert Louis Steigerwald ,  Ahmed Elasser ,  Juan Antonio Sabate ,  Maja Harfman Todorovic ,  Mohammed Agamy

IPC分类号： H01H9/54

CPC分类号： H02M3/3372 ,  H02J3/383 ,  H02M3/158 ,  H02M2001/0093 ,  Y02E10/563 ,  Y10T307/944

摘要： A power generation system configured to provide direct current (DC) power to a DC link is described. The system includes a first power generation unit configured to output DC power. The system also includes a first DC to DC converter comprising an input section and an output section. The output section of the first DC to DC converter is coupled in series with the first power generation unit. The first DC to DC converter is configured to process a first portion of the DC power output by the first power generation unit and to provide an unprocessed second portion of the DC power output of the first power generation unit to the output section.

摘要翻译： 描述了被配置为向DC链路提供直流（DC）电力的发电系统。 该系统包括被配置为输出直流电力的第一发电单元。 该系统还包括第一DC-DC转换器，其包括输入部分和输出部分。 第一DC-DC转换器的输出部分与第一发电单元串联耦合。 第一DC-DC转换器被配置为处理由第一发电单元输出的直流电力的第一部分，并且向输出部提供第一发电单元的直流电力输出的未处理的第二部分。

公开(公告)号：US20120049635A1

公开(公告)日：2012-03-01

申请号：US12869945

申请日：2010-08-27

申请人： Owen Jannis Schelenz ,  Kathleen Ann O'Brien ,  Juan Antonio Sabate

发明人： Owen Jannis Schelenz ,  Kathleen Ann O'Brien ,  Juan Antonio Sabate

IPC分类号： H02J3/04 ,  H02M7/42

CPC分类号： H02J3/385 ,  G05F1/67 ,  Y02E10/58 ,  Y10T307/707

摘要： A power generation system includes photovoltaic (PV) modules for generating power and power converters coupled to receive power from the PV modules. The power generation system further includes converter controllers to control the power converters, each converter controller includes a maximum power point tracking control element. A master controller in the power generation system is configured to coordinate power outputs of the power converters by controlling the timing and numbers of power converters having power-voltage (P-V) curves sweeping between maximum power points and power points off the maximum power points.

摘要翻译： 发电系统包括用于产生功率和功率转换器的光伏（PV）模块，耦合到从光伏组件接收功率。 发电系统还包括用于控制功率转换器的转换器控制器，每个转换器控制器包括最大功率点跟踪控制元件。 发电系统中的主控制器被配置为通过控制在最大功率点和最大功率点之间的功率点之间扫描的电源电压（P-V）曲线的功率转换器的时序和数量来协调功率转换器的功率输出。

公开(公告)号：US20100271081A1

公开(公告)日：2010-10-28

申请号：US12495048

申请日：2009-06-30

申请人： Antonio Caiafa ,  Jeffrey Joseph Nasadoski ,  John Stanley Glaser ,  Juan Antonio Sabate ,  Richard Alfred Beaupre

发明人： Antonio Caiafa ,  Jeffrey Joseph Nasadoski ,  John Stanley Glaser ,  Juan Antonio Sabate ,  Richard Alfred Beaupre

IPC分类号： H03K3/00

CPC分类号： H03K17/687 ,  H03K2017/6875 ,  H03K2217/0036

摘要： One embodiment is a gate drive circuitry for switching a semiconductor device having a non-isolated input, the gate drive circuitry having a first circuitry configured to turn-on the semiconductor device by imposing a current on a gate of the semiconductor device so as to forward bias an inherent parasitic diode of the semiconductor device. There is a second circuitry configured to turn-off the semiconductor device by imposing a current on the gate of the semiconductor device so as to reverse bias the parasitic diode of the semiconductor device wherein the first circuitry and the second circuitry are coupled to the semiconductor device respectively through a first switch and a second switch.

摘要翻译： 一个实施例是用于切换具有非隔离输入的半导体器件的栅极驱动电路，栅极驱动电路具有第一电路，其被配置为通过在半导体器件的栅极上施加电流来接通半导体器件，以便向前 偏置半导体器件的固有寄生二极管。 存在第二电路，其被配置为通过在半导体器件的栅极上施加电流来关断半导体器件，以便反向偏置半导体器件的寄生二极管，其中第一电路和第二电路耦合到半导体器件 分别通过第一开关和第二开关。