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1. 发明授权

US09389288B2 System and method for maintaining soft switching condition in a gradient coil driver circuit 有权
标题翻译：用于在梯形线圈驱动电路中维持软开关条件的系统和方法
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。

2. 发明申请

US20140077812A1 SYSTEM AND METHOD FOR MAINTAINING SOFT SWITCHING CONDITION IN A GRADIENT COIL DRIVER CIRCUIT 有权
标题翻译：用于维护梯形线圈驱动电路中的软开关状态的系统和方法
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。

3. 发明申请

US20120249145A1 GRADIENT AMPLIFIER SYSTEM 有权
标题翻译：梯级放大器系统
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。

4. 发明授权

US08502539B2 Gradient amplifier system 有权
标题翻译：梯度放大器系统
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。

5. 发明授权

US08866565B2 Systems and methods for providing an electric choke 有权
标题翻译：提供电扼流圈的系统和方法
公开(公告)号：US08866565B2
公开(公告)日：2014-10-21
申请号：US13335582
申请日：2011-12-22
申请人： Rixin Lai , Joseph Smolenski
发明人： Rixin Lai , Joseph Smolenski
IPC分类号： H03H7/42 , H03H7/09
CPC分类号： H03H7/427 , H01F17/062 , H01F2017/065 , H03H7/09 , Y10T29/49071
摘要： Systems and methods for an electric choke are provided. The choke may be provided as part of a power transmission arrangement that includes a cable for electrically coupling a power source and a powered device having a ground node and a wire separate from the cable providing a path for a common-mode current through the ground node. The power transmission arrangement also includes an unbalanced choke coupled between the power source and the powered device, wherein a number of turns of the cable in the choke is different than a number of turns of the wire in the choke.
摘要翻译：提供电扼流圈的系统和方法。扼流器可以被提供作为电力传输装置的一部分，其包括用于电耦合电源的电缆和具有接地节点的电力设备和与电缆分离的电线，提供用于通过接地节点的共模电流的路径。动力传递装置还包括耦合在电源和受电设备之间的不平衡扼流器，其中扼流圈中的电缆的匝数不同于扼流圈中的线的匝数。

6. 发明申请

US20130162370A1 SYSTEMS AND METHODS FOR PROVIDING AN ELECTRIC CHOKE 有权
标题翻译：用于提供电动筷子的系统和方法
公开(公告)号：US20130162370A1
公开(公告)日：2013-06-27
申请号：US13335582
申请日：2011-12-22
申请人： Rixin Lai , Joseph Smolenski
发明人： Rixin Lai , Joseph Smolenski
IPC分类号： H03H7/01
CPC分类号： H03H7/427 , H01F17/062 , H01F2017/065 , H03H7/09 , Y10T29/49071
摘要： Systems and methods for an electric choke are provided. The choke may be provided as part of a power transmission arrangement that includes a cable for electrically coupling a power source and a powered device having a ground node and a wire separate from the cable providing a path for a common-mode current through the ground node. The power transmission arrangement also includes an unbalanced choke coupled between the power source and the powered device, wherein a number of turns of the cable in the choke is different than a number of turns of the wire in the choke.
摘要翻译：提供电扼流圈的系统和方法。扼流器可以被提供作为电力传输装置的一部分，其包括用于电耦合电源的电缆和具有接地节点的电力设备和与电缆分离的电线，提供用于通过接地节点的共模电流的路径。动力传递装置还包括耦合在电源和受电设备之间的不平衡扼流器，其中扼流圈中的电缆的匝数不同于扼流圈中的线的匝数。

7. 发明授权

US08730690B2 Systems and apparatus for reducing electromagnetic interference and methods of assembling the same 有权
标题翻译：用于减少电磁干扰的系统和装置及其组装方法
公开(公告)号：US08730690B2
公开(公告)日：2014-05-20
申请号：US12956835
申请日：2010-11-30
申请人： Rixin Lai , Joseph Smolenski
发明人： Rixin Lai , Joseph Smolenski
IPC分类号： H02H7/122
CPC分类号： H02P27/08 , H02M2001/123
摘要： An electric machine drive system is described. The system includes an inverter, an electric machine coupled to the inverter by at least one output conductor and including a ground connection, and an active common mode current reducing device coupled between the ground connection of the electric machine and the inverter.
摘要翻译：描述了电机驱动系统。该系统包括逆变器，通过至少一个输出导体耦合到逆变器并且包括接地连接的电机以及耦合在电机的接地连接和逆变器之间的有源共模电流降低装置。

8. 发明申请

US20120134188A1 Systems and Apparatus for Reducing Electromagnetic Interference and Methods of Assembling the Same 有权
标题翻译：减少电磁干扰的系统和装置及其组装方法
公开(公告)号：US20120134188A1
公开(公告)日：2012-05-31
申请号：US12956835
申请日：2010-11-30
申请人： Rixin Lai , Joseph Smolenski
发明人： Rixin Lai , Joseph Smolenski
IPC分类号： H02M1/00 , H02M7/42 , H02P27/06 , G05F5/00
CPC分类号： H02P27/08 , H02M2001/123
摘要： An electric machine drive system is described. The system includes an inverter, an electric machine coupled to the inverter by at least one output conductor and including a ground connection, and an active common mode current reducing device coupled between the ground connection of the electric machine and the inverter.
摘要翻译：描述了电机驱动系统。该系统包括逆变器，通过至少一个输出导体耦合到逆变器并且包括接地连接的电机以及耦合在电机的接地连接和逆变器之间的有源共模电流降低装置。

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