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1. 发明申请

US20110074413A1 SYSTEM AND METHOD FOR CONTROLLING CURRENT IN GRADIENT COIL OF MAGNETIC RESONANCE IMAGING SYSTEM 有权
标题翻译：用于控制磁共振成像系统梯度线圈电流的系统和方法
公开(公告)号：US20110074413A1
公开(公告)日：2011-03-31
申请号：US12569138
申请日：2009-09-29
申请人： Perumal Venkatesa
发明人： Perumal Venkatesa
IPC分类号： G01R33/48 , G01R33/44 , G01R19/18
CPC分类号： G01R33/3852 , H02M7/487
摘要： In one embodiment, a multilevel inverter for generating an AC output voltage, having at least seven potential levels, from a DC voltage source such that the generated AC voltage produces a current in a gradient coil of a magnetic resonance imaging system is provided. The multilevel inverter comprises an input voltage supply device configured for providing a divided DC voltage, at least eight switching arms for deriving the AC output voltages from the divided DC voltages, each of the switching arms comprising an input terminal receiving the divided DC voltage, a switching device controlling the AC output voltage and an output terminal providing the AC output voltage, at least four diodes, each of the four diodes connected to a single pair of switching arms, the four diodes forming a full bridge having positive and negative nodes, one of the nodes connected to the input voltage supply device and another node connected to the input terminals of the switching arms and a controller coupled to the input voltage supply device and the four diodes, the controller configured for producing plurality of control signals for controlling the AC output voltage.
摘要翻译：在一个实施例中，提供一种多电平逆变器，用于从DC电压源产生具有至少七个电位电平的AC输出电压，使得所产生的AC电压产生磁共振成像系统的梯度线圈中的电流。多电平逆变器包括被配置为提供分压的DC电压的输入电压供给装置，至少八个用于从分压的DC电压导出AC输出电压的开关臂，每个开关臂包括接收分压的DC电压的输入端子，控制AC输出电压的开关装置和提供AC输出电压的输出端子，至少四个二极管，四个二极管中的每一个连接到单对开关臂，四个二极管形成具有正和负节点的全桥，一个连接到所述输入电压供应装置的节点和连接到所述开关臂的输入端子的另一节点以及耦合到所述输入电压供应装置和所述四个二极管的控制器，所述控制器被配置用于产生用于控制所述AC的多个控制信号输出电压。

2. 发明授权

US08278927B2 System and method for controlling current in gradient coil of magnetic resonance imaging system 有权
标题翻译：磁共振成像系统梯度线圈电流控制系统及方法
公开(公告)号：US08278927B2
公开(公告)日：2012-10-02
申请号：US12569138
申请日：2009-09-29
申请人： Perumal Venkatesa
发明人： Perumal Venkatesa
IPC分类号： G01V33/00 , G01R33/44
CPC分类号： G01R33/3852 , H02M7/487
摘要： In one embodiment, a multilevel inverter for generating an AC output voltage, having at least seven potential levels, from a DC voltage source such that the generated AC voltage produces a current in a gradient coil of a magnetic resonance imaging system is provided. The multilevel inverter comprises an input voltage supply device configured for providing a divided DC voltage, at least eight switching arms for deriving the AC output voltages from the divided DC voltages, each of the switching arms comprising an input terminal receiving the divided DC voltage, a switching device controlling the AC output voltage and an output terminal providing the AC output voltage, at least four diodes, each of the four diodes connected to a single pair of switching arms, the four diodes forming a full bridge having positive and negative nodes, one of the nodes connected to the input voltage supply device and another node connected to the input terminals of the switching arms and a controller coupled to the input voltage supply device and the four diodes, the controller configured for producing plurality of control signals for controlling the AC output voltage.
摘要翻译：在一个实施例中，提供一种多电平逆变器，用于从DC电压源产生具有至少七个电位电平的AC输出电压，使得所产生的AC电压产生磁共振成像系统的梯度线圈中的电流。多电平逆变器包括被配置为提供分压的DC电压的输入电压供给装置，至少八个用于从分压的DC电压导出AC输出电压的开关臂，每个开关臂包括接收分压的DC电压的输入端子，控制AC输出电压的开关装置和提供AC输出电压的输出端子，至少四个二极管，四个二极管中的每一个连接到单对开关臂，四个二极管形成具有正和负节点的全桥，一个连接到所述输入电压供应装置的节点和连接到所述开关臂的输入端子的另一节点以及耦合到所述输入电压供应装置和所述四个二极管的控制器，所述控制器被配置用于产生用于控制所述AC的多个控制信号输出电压。

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